1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "class_ext-inl.h"
#include "art_method-inl.h"
#include "base/casts.h"
#include "base/enums.h"
#include "base/utils.h"
#include "class-inl.h"
#include "class_root.h"
#include "dex/dex_file-inl.h"
#include "gc/accounting/card_table-inl.h"
#include "object-inl.h"
#include "object_array.h"
#include "stack_trace_element.h"
#include "well_known_classes.h"
namespace art {
namespace mirror {
uint32_t ClassExt::ClassSize(PointerSize pointer_size) {
uint32_t vtable_entries = Object::kVTableLength;
return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 0, 0, pointer_size);
}
void ClassExt::SetObsoleteArrays(ObjPtr<PointerArray> methods,
ObjPtr<ObjectArray<DexCache>> dex_caches) {
CHECK_EQ(methods.IsNull(), dex_caches.IsNull());
auto obsolete_dex_cache_off = OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_dex_caches_);
auto obsolete_methods_off = OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_methods_);
DCHECK(!Runtime::Current()->IsActiveTransaction());
SetFieldObject<false>(obsolete_dex_cache_off, dex_caches);
SetFieldObject<false>(obsolete_methods_off, methods);
}
// We really need to be careful how we update this. If we ever in the future make it so that
// these arrays are written into without all threads being suspended we have a race condition! This
// race could cause obsolete methods to be missed.
bool ClassExt::ExtendObsoleteArrays(Thread* self, uint32_t increase) {
// TODO It would be good to check that we have locked the class associated with this ClassExt.
StackHandleScope<5> hs(self);
Handle<ClassExt> h_this(hs.NewHandle(this));
Handle<PointerArray> old_methods(hs.NewHandle(h_this->GetObsoleteMethods()));
Handle<ObjectArray<DexCache>> old_dex_caches(hs.NewHandle(h_this->GetObsoleteDexCaches()));
ClassLinker* cl = Runtime::Current()->GetClassLinker();
size_t new_len;
if (old_methods == nullptr) {
CHECK(old_dex_caches == nullptr);
new_len = increase;
} else {
CHECK_EQ(old_methods->GetLength(), old_dex_caches->GetLength());
new_len = increase + old_methods->GetLength();
}
Handle<PointerArray> new_methods(hs.NewHandle<PointerArray>(
cl->AllocPointerArray(self, new_len)));
if (new_methods.IsNull()) {
// Fail.
self->AssertPendingOOMException();
return false;
}
Handle<ObjectArray<DexCache>> new_dex_caches(hs.NewHandle<ObjectArray<DexCache>>(
ObjectArray<DexCache>::Alloc(self,
cl->FindClass(self,
"[Ljava/lang/DexCache;",
ScopedNullHandle<ClassLoader>()),
new_len)));
if (new_dex_caches.IsNull()) {
// Fail.
self->AssertPendingOOMException();
return false;
}
if (!old_methods.IsNull()) {
// Copy the old contents.
new_methods->Memcpy(0,
old_methods.Get(),
0,
old_methods->GetLength(),
cl->GetImagePointerSize());
new_dex_caches->AsObjectArray<Object>()->AssignableCheckingMemcpy<false>(
0, old_dex_caches->AsObjectArray<Object>(), 0, old_dex_caches->GetLength(), false);
}
// Set the fields.
h_this->SetObsoleteArrays(new_methods.Get(), new_dex_caches.Get());
return true;
}
ClassExt* ClassExt::Alloc(Thread* self) {
return down_cast<ClassExt*>(GetClassRoot<ClassExt>()->AllocObject(self).Ptr());
}
void ClassExt::SetVerifyError(ObjPtr<Object> err) {
if (Runtime::Current()->IsActiveTransaction()) {
SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err);
} else {
SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err);
}
}
void ClassExt::SetOriginalDexFile(ObjPtr<Object> bytes) {
DCHECK(!Runtime::Current()->IsActiveTransaction());
SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(ClassExt, original_dex_file_), bytes);
}
} // namespace mirror
} // namespace art
|