99 lines
3.1 KiB
Go
99 lines
3.1 KiB
Go
|
// Copyright 2016 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.
|
||
|
|
|
||
|
|
// +build ignore
|
||
|
|
|
||
|
|
// mkpost processes the output of cgo -godefs to
|
||
|
|
// modify the generated types. It is used to clean up
|
||
|
|
// the sys API in an architecture specific manner.
|
||
|
|
//
|
||
|
|
// mkpost is run after cgo -godefs; see README.md.
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"fmt"
|
||
|
|
"go/format"
|
||
|
|
"io/ioutil"
|
||
|
|
"log"
|
||
|
|
"os"
|
||
|
|
"regexp"
|
||
|
|
)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// Get the OS and architecture (using GOARCH_TARGET if it exists)
|
||
|
|
goos := os.Getenv("GOOS")
|
||
|
|
goarch := os.Getenv("GOARCH_TARGET")
|
||
|
|
if goarch == "" {
|
||
|
|
goarch = os.Getenv("GOARCH")
|
||
|
|
}
|
||
|
|
// Check that we are using the new build system if we should be.
|
||
|
|
if goos == "linux" && goarch != "sparc64" {
|
||
|
|
if os.Getenv("GOLANG_SYS_BUILD") != "docker" {
|
||
|
|
os.Stderr.WriteString("In the new build system, mkpost should not be called directly.\n")
|
||
|
|
os.Stderr.WriteString("See README.md\n")
|
||
|
|
os.Exit(1)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
b, err := ioutil.ReadAll(os.Stdin)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Intentionally export __val fields in Fsid and Sigset_t
|
||
|
|
valRegex := regexp.MustCompile(`type (Fsid|Sigset_t) struct {(\s+)X__val(\s+\S+\s+)}`)
|
||
|
|
b = valRegex.ReplaceAll(b, []byte("type $1 struct {${2}Val$3}"))
|
||
|
|
|
||
|
|
// If we have empty Ptrace structs, we should delete them. Only s390x emits
|
||
|
|
// nonempty Ptrace structs.
|
||
|
|
ptraceRexexp := regexp.MustCompile(`type Ptrace((Psw|Fpregs|Per) struct {\s*})`)
|
||
|
|
b = ptraceRexexp.ReplaceAll(b, nil)
|
||
|
|
|
||
|
|
// Replace the control_regs union with a blank identifier for now.
|
||
|
|
controlRegsRegex := regexp.MustCompile(`(Control_regs)\s+\[0\]uint64`)
|
||
|
|
b = controlRegsRegex.ReplaceAll(b, []byte("_ [0]uint64"))
|
||
|
|
|
||
|
|
// Remove fields that are added by glibc
|
||
|
|
// Note that this is unstable as the identifers are private.
|
||
|
|
removeFieldsRegex := regexp.MustCompile(`X__glibc\S*`)
|
||
|
|
b = removeFieldsRegex.ReplaceAll(b, []byte("_"))
|
||
|
|
|
||
|
|
// Convert [65]int8 to [65]byte in Utsname members to simplify
|
||
|
|
// conversion to string; see golang.org/issue/20753
|
||
|
|
convertUtsnameRegex := regexp.MustCompile(`((Sys|Node|Domain)name|Release|Version|Machine)(\s+)\[(\d+)\]u?int8`)
|
||
|
|
b = convertUtsnameRegex.ReplaceAll(b, []byte("$1$3[$4]byte"))
|
||
|
|
|
||
|
|
// Remove spare fields (e.g. in Statx_t)
|
||
|
|
spareFieldsRegex := regexp.MustCompile(`X__spare\S*`)
|
||
|
|
b = spareFieldsRegex.ReplaceAll(b, []byte("_"))
|
||
|
|
|
||
|
|
// Remove cgo padding fields
|
||
|
|
removePaddingFieldsRegex := regexp.MustCompile(`Pad_cgo_\d+`)
|
||
|
|
b = removePaddingFieldsRegex.ReplaceAll(b, []byte("_"))
|
||
|
|
|
||
|
|
// Remove padding, hidden, or unused fields
|
||
|
|
removeFieldsRegex = regexp.MustCompile(`\bX_\S+`)
|
||
|
|
b = removeFieldsRegex.ReplaceAll(b, []byte("_"))
|
||
|
|
|
||
|
|
// Remove the first line of warning from cgo
|
||
|
|
b = b[bytes.IndexByte(b, '\n')+1:]
|
||
|
|
// Modify the command in the header to include:
|
||
|
|
// mkpost, our own warning, and a build tag.
|
||
|
|
replacement := fmt.Sprintf(`$1 | go run mkpost.go
|
||
|
|
// Code generated by the command above; see README.md. DO NOT EDIT.
|
||
|
|
|
||
|
|
// +build %s,%s`, goarch, goos)
|
||
|
|
cgoCommandRegex := regexp.MustCompile(`(cgo -godefs .*)`)
|
||
|
|
b = cgoCommandRegex.ReplaceAll(b, []byte(replacement))
|
||
|
|
|
||
|
|
// gofmt
|
||
|
|
b, err = format.Source(b)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
os.Stdout.Write(b)
|
||
|
|
}
|