go export 源码
golang export 代码
文件路径：/src/cmd/compile/internal/gc/export.go
// 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 (
"fmt"
"go/constant"
"cmd/compile/internal/base"
"cmd/compile/internal/ir"
"cmd/compile/internal/typecheck"
"cmd/compile/internal/types"
"cmd/internal/bio"
)
func dumpasmhdr() {
b, err := bio.Create(base.Flag.AsmHdr)
if err != nil {
base.Fatalf("%v", err)
}
fmt.Fprintf(b, "// generated by compile -asmhdr from package %s\n\n", types.LocalPkg.Name)
for _, n := range typecheck.Target.Asms {
if n.Sym().IsBlank() {
continue
}
switch n.Op() {
case ir.OLITERAL:
t := n.Val().Kind()
if t == constant.Float || t == constant.Complex {
break
}
fmt.Fprintf(b, "#define const_%s %v\n", n.Sym().Name, n.Val().ExactString())
case ir.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.Size()))
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()
}
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