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
|
/*
* Copyright (C) 2018 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 "var_handles.h"
#include "common_throws.h"
#include "dex/dex_instruction.h"
#include "handle.h"
#include "method_handles-inl.h"
#include "mirror/method_type-inl.h"
#include "mirror/var_handle.h"
namespace art {
namespace {
bool VarHandleInvokeAccessorWithConversions(Thread* self,
ShadowFrame& shadow_frame,
Handle<mirror::VarHandle> var_handle,
Handle<mirror::MethodType> callsite_type,
const mirror::VarHandle::AccessMode access_mode,
const InstructionOperands* const operands,
JValue* result)
REQUIRES_SHARED(Locks::mutator_lock_) {
StackHandleScope<1> hs(self);
Handle<mirror::MethodType> accessor_type(hs.NewHandle(
var_handle->GetMethodTypeForAccessMode(self, access_mode)));
const size_t num_vregs = accessor_type->NumberOfVRegs();
const int num_params = accessor_type->GetPTypes()->GetLength();
ShadowFrameAllocaUniquePtr accessor_frame =
CREATE_SHADOW_FRAME(num_vregs, nullptr, shadow_frame.GetMethod(), shadow_frame.GetDexPC());
ShadowFrameGetter getter(shadow_frame, operands);
static const uint32_t kFirstDestinationReg = 0;
ShadowFrameSetter setter(accessor_frame.get(), kFirstDestinationReg);
if (!PerformConversions(self, callsite_type, accessor_type, &getter, &setter, num_params)) {
return false;
}
RangeInstructionOperands accessor_operands(kFirstDestinationReg,
kFirstDestinationReg + num_vregs);
if (!var_handle->Access(access_mode, accessor_frame.get(), &accessor_operands, result)) {
return false;
}
return ConvertReturnValue(callsite_type, accessor_type, result);
}
} // namespace
bool VarHandleInvokeAccessor(Thread* self,
ShadowFrame& shadow_frame,
Handle<mirror::VarHandle> var_handle,
Handle<mirror::MethodType> callsite_type,
const mirror::VarHandle::AccessMode access_mode,
const InstructionOperands* const operands,
JValue* result) {
if (var_handle.IsNull()) {
ThrowNullPointerExceptionFromDexPC();
return false;
}
if (!var_handle->IsAccessModeSupported(access_mode)) {
ThrowUnsupportedOperationException();
return false;
}
mirror::VarHandle::MatchKind match_kind =
var_handle->GetMethodTypeMatchForAccessMode(access_mode, callsite_type.Get());
if (LIKELY(match_kind == mirror::VarHandle::MatchKind::kExact)) {
return var_handle->Access(access_mode, &shadow_frame, operands, result);
} else if (match_kind == mirror::VarHandle::MatchKind::kWithConversions) {
return VarHandleInvokeAccessorWithConversions(self,
shadow_frame,
var_handle,
callsite_type,
access_mode,
operands,
result);
} else {
DCHECK_EQ(match_kind, mirror::VarHandle::MatchKind::kNone);
ThrowWrongMethodTypeException(var_handle->PrettyDescriptorForAccessMode(access_mode),
callsite_type->PrettyDescriptor());
return false;
}
}
} // namespace art
|
