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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
// Copyright 2009 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 gc
import (
"cmd/compile/internal/types"
"cmd/internal/bio"
"cmd/internal/src"
"fmt"
)
var (
Debug_export int // if set, print debugging information about export data
)
func exportf(bout *bio.Writer, format string, args ...interface{}) {
fmt.Fprintf(bout, format, args...)
if Debug_export != 0 {
fmt.Printf(format, args...)
}
}
var asmlist []*Node
// exportsym marks n for export (or reexport).
func exportsym(n *Node) {
if n.Sym.OnExportList() {
return
}
n.Sym.SetOnExportList(true)
if Debug['E'] != 0 {
fmt.Printf("export symbol %v\n", n.Sym)
}
exportlist = append(exportlist, n)
}
func initname(s string) bool {
return s == "init"
}
func autoexport(n *Node, ctxt Class) {
if n.Sym.Pkg != localpkg {
return
}
if (ctxt != PEXTERN && ctxt != PFUNC) || dclcontext != PEXTERN {
return
}
if n.Type != nil && n.Type.IsKind(TFUNC) && n.IsMethod() {
return
}
if types.IsExported(n.Sym.Name) || initname(n.Sym.Name) {
exportsym(n)
}
if asmhdr != "" && !n.Sym.Asm() {
n.Sym.SetAsm(true)
asmlist = append(asmlist, n)
}
}
func dumpexport(bout *bio.Writer) {
// The linker also looks for the $$ marker - use char after $$ to distinguish format.
exportf(bout, "\n$$B\n") // indicate binary export format
off := bout.Offset()
iexport(bout.Writer)
size := bout.Offset() - off
exportf(bout, "\n$$\n")
if Debug_export != 0 {
fmt.Printf("BenchmarkExportSize:%s 1 %d bytes\n", myimportpath, size)
}
}
func importsym(ipkg *types.Pkg, s *types.Sym, op Op) *Node {
n := asNode(s.PkgDef())
if n == nil {
// iimport should have created a stub ONONAME
// declaration for all imported symbols. The exception
// is declarations for Runtimepkg, which are populated
// by loadsys instead.
if s.Pkg != Runtimepkg {
Fatalf("missing ONONAME for %v\n", s)
}
n = dclname(s)
s.SetPkgDef(asTypesNode(n))
s.Importdef = ipkg
}
if n.Op != ONONAME && n.Op != op {
redeclare(lineno, s, fmt.Sprintf("during import %q", ipkg.Path))
}
return n
}
// pkgtype returns the named type declared by symbol s.
// If no such type has been declared yet, a forward declaration is returned.
// ipkg is the package being imported
func importtype(ipkg *types.Pkg, pos src.XPos, s *types.Sym) *types.Type {
n := importsym(ipkg, s, OTYPE)
if n.Op != OTYPE {
t := types.New(TFORW)
t.Sym = s
t.Nod = asTypesNode(n)
n.Op = OTYPE
n.Pos = pos
n.Type = t
n.SetClass(PEXTERN)
}
t := n.Type
if t == nil {
Fatalf("importtype %v", s)
}
return t
}
// importobj declares symbol s as an imported object representable by op.
// ipkg is the package being imported
func importobj(ipkg *types.Pkg, pos src.XPos, s *types.Sym, op Op, ctxt Class, t *types.Type) *Node {
n := importsym(ipkg, s, op)
if n.Op != ONONAME {
if n.Op == op && (n.Class() != ctxt || !types.Identical(n.Type, t)) {
redeclare(lineno, s, fmt.Sprintf("during import %q", ipkg.Path))
}
return nil
}
n.Op = op
n.Pos = pos
n.SetClass(ctxt)
if ctxt == PFUNC {
n.Sym.SetFunc(true)
}
n.Type = t
return n
}
// importconst declares symbol s as an imported constant with type t and value val.
// ipkg is the package being imported
func importconst(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type, val Val) {
n := importobj(ipkg, pos, s, OLITERAL, PEXTERN, t)
if n == nil { // TODO: Check that value matches.
return
}
n.SetVal(val)
if Debug['E'] != 0 {
fmt.Printf("import const %v %L = %v\n", s, t, val)
}
}
// importfunc declares symbol s as an imported function with type t.
// ipkg is the package being imported
func importfunc(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) {
n := importobj(ipkg, pos, s, ONAME, PFUNC, t)
if n == nil {
return
}
n.Func = new(Func)
t.SetNname(asTypesNode(n))
if Debug['E'] != 0 {
fmt.Printf("import func %v%S\n", s, t)
}
}
// importvar declares symbol s as an imported variable with type t.
// ipkg is the package being imported
func importvar(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) {
n := importobj(ipkg, pos, s, ONAME, PEXTERN, t)
if n == nil {
return
}
if Debug['E'] != 0 {
fmt.Printf("import var %v %L\n", s, t)
}
}
// importalias declares symbol s as an imported type alias with type t.
// ipkg is the package being imported
func importalias(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) {
n := importobj(ipkg, pos, s, OTYPE, PEXTERN, t)
if n == nil {
return
}
if Debug['E'] != 0 {
fmt.Printf("import type %v = %L\n", s, t)
}
}
func dumpasmhdr() {
b, err := bio.Create(asmhdr)
if err != nil {
Fatalf("%v", err)
}
fmt.Fprintf(b, "// generated by compile -asmhdr from package %s\n\n", localpkg.Name)
for _, n := range asmlist {
if n.Sym.IsBlank() {
continue
}
switch n.Op {
case OLITERAL:
t := n.Val().Ctype()
if t == CTFLT || t == CTCPLX {
break
}
fmt.Fprintf(b, "#define const_%s %#v\n", n.Sym.Name, n.Val())
case OTYPE:
t := n.Type
if !t.IsStruct() || t.StructType().Map != nil || t.IsFuncArgStruct() {
break
}
fmt.Fprintf(b, "#define %s__size %d\n", n.Sym.Name, int(t.Width))
for _, f := range t.Fields().Slice() {
if !f.Sym.IsBlank() {
fmt.Fprintf(b, "#define %s_%s %d\n", n.Sym.Name, f.Sym.Name, int(f.Offset))
}
}
}
}
b.Close()
}
|
