blob: 985fd3851993d0d72b21c738e2c20e19ca072c8d (
plain)
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
|
/*
* Copyright (C) 2011 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 "stack.h"
#include "compiler.h"
#include "object.h"
int oatVRegOffsetFromMethod(art::Method* method, int reg);
namespace art {
bool Frame::HasMethod() const {
return GetMethod() != NULL && (!GetMethod()->IsCalleeSaveMethod());
}
void Frame::Next() {
size_t frame_size = GetMethod()->GetFrameSizeInBytes();
DCHECK_NE(frame_size, 0u);
DCHECK_LT(frame_size, 1024u);
byte* next_sp = reinterpret_cast<byte*>(sp_) + frame_size;
sp_ = reinterpret_cast<Method**>(next_sp);
if (*sp_ != NULL) {
DCHECK((*sp_)->GetClass() == Method::GetMethodClass() ||
(*sp_)->GetClass() == Method::GetConstructorClass());
}
}
uintptr_t Frame::GetReturnPC() const {
byte* pc_addr = reinterpret_cast<byte*>(sp_) + GetMethod()->GetReturnPcOffsetInBytes();
return *reinterpret_cast<uintptr_t*>(pc_addr);
}
uintptr_t Frame::GetVReg(Method* method, int vreg) const {
DCHECK(method == GetMethod());
int offset = oatVRegOffsetFromMethod(method, vreg);
byte* vreg_addr = reinterpret_cast<byte*>(sp_) + offset;
return *reinterpret_cast<uintptr_t*>(vreg_addr);
}
uintptr_t Frame::LoadCalleeSave(int num) const {
// Callee saves are held at the top of the frame
Method* method = GetMethod();
DCHECK(method != NULL);
size_t frame_size = method->GetFrameSizeInBytes();
byte* save_addr = reinterpret_cast<byte*>(sp_) + frame_size - ((num + 1) * kPointerSize);
#if defined(__i386__)
save_addr -= kPointerSize; // account for return address
#endif
return *reinterpret_cast<uintptr_t*>(save_addr);
}
Method* Frame::NextMethod() const {
byte* next_sp = reinterpret_cast<byte*>(sp_) + GetMethod()->GetFrameSizeInBytes();
return *reinterpret_cast<Method**>(next_sp);
}
} // namespace art
|