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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package reflect
import (
"sync"
"unsafe"
)
// MakeRO returns a copy of v with the read-only flag set.
func MakeRO(v Value) Value {
v.flag |= flagStickyRO
return v
}
// IsRO reports whether v's read-only flag is set.
func IsRO(v Value) bool {
return v.flag&flagStickyRO != 0
}
var CallGC = &callGC
const PtrSize = ptrSize
// FuncLayout calls funcLayout and returns a subset of the results for testing.
//
// Bitmaps like stack, gc, inReg, and outReg are expanded such that each bit
// takes up one byte, so that writing out test cases is a little clearer.
// If ptrs is false, gc will be nil.
func FuncLayout(t Type, rcvr Type) (frametype Type, argSize, retOffset uintptr, stack, gc, inReg, outReg []byte, ptrs bool) {
var ft *rtype
var abid abiDesc
if rcvr != nil {
ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.(*rtype))), rcvr.(*rtype))
} else {
ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.(*rtype))), nil)
}
// Extract size information.
argSize = abid.stackCallArgsSize
retOffset = abid.retOffset
frametype = ft
// Expand stack pointer bitmap into byte-map.
for i := uint32(0); i < abid.stackPtrs.n; i++ {
stack = append(stack, abid.stackPtrs.data[i/8]>>(i%8)&1)
}
// Expand register pointer bitmaps into byte-maps.
bool2byte := func(b bool) byte {
if b {
return 1
}
return 0
}
for i := 0; i < intArgRegs; i++ {
inReg = append(inReg, bool2byte(abid.inRegPtrs.Get(i)))
outReg = append(outReg, bool2byte(abid.outRegPtrs.Get(i)))
}
if ft.kind&kindGCProg != 0 {
panic("can't handle gc programs")
}
// Expand frame type's GC bitmap into byte-map.
ptrs = ft.ptrdata != 0
if ptrs {
nptrs := ft.ptrdata / ptrSize
gcdata := ft.gcSlice(0, (nptrs+7)/8)
for i := uintptr(0); i < nptrs; i++ {
gc = append(gc, gcdata[i/8]>>(i%8)&1)
}
}
return
}
func TypeLinks() []string {
var r []string
sections, offset := typelinks()
for i, offs := range offset {
rodata := sections[i]
for _, off := range offs {
typ := (*rtype)(resolveTypeOff(unsafe.Pointer(rodata), off))
r = append(r, typ.String())
}
}
return r
}
var GCBits = gcbits
func gcbits(interface{}) []byte // provided by runtime
func MapBucketOf(x, y Type) Type {
return bucketOf(x.(*rtype), y.(*rtype))
}
func CachedBucketOf(m Type) Type {
t := m.(*rtype)
if Kind(t.kind&kindMask) != Map {
panic("not map")
}
tt := (*mapType)(unsafe.Pointer(t))
return tt.bucket
}
type EmbedWithUnexpMeth struct{}
func (EmbedWithUnexpMeth) f() {}
type pinUnexpMeth interface {
f()
}
var pinUnexpMethI = pinUnexpMeth(EmbedWithUnexpMeth{})
func FirstMethodNameBytes(t Type) *byte {
_ = pinUnexpMethI
ut := t.uncommon()
if ut == nil {
panic("type has no methods")
}
m := ut.methods()[0]
mname := t.(*rtype).nameOff(m.name)
if *mname.data(0, "name flag field")&(1<<2) == 0 {
panic("method name does not have pkgPath *string")
}
return mname.bytes
}
type OtherPkgFields struct {
OtherExported int
otherUnexported int
}
func IsExported(t Type) bool {
typ := t.(*rtype)
n := typ.nameOff(typ.str)
return n.isExported()
}
func ResolveReflectName(s string) {
resolveReflectName(newName(s, "", false))
}
type Buffer struct {
buf []byte
}
func clearLayoutCache() {
layoutCache = sync.Map{}
}
func SetArgRegs(ints, floats int, floatSize uintptr) (oldInts, oldFloats int, oldFloatSize uintptr) {
oldInts = intArgRegs
oldFloats = floatArgRegs
oldFloatSize = floatRegSize
intArgRegs = ints
floatArgRegs = floats
floatRegSize = floatSize
clearLayoutCache()
return
}
|
