github.com/gogf/gkafka@v1.0.1-0.20190702070843-033a14468069/third/golang.org/x/sys/unix/mkpost.go (about) 1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build ignore 6 7 // mkpost processes the output of cgo -godefs to 8 // modify the generated types. It is used to clean up 9 // the sys API in an architecture specific manner. 10 // 11 // mkpost is run after cgo -godefs; see README.md. 12 package main 13 14 import ( 15 "bytes" 16 "fmt" 17 "go/format" 18 "io/ioutil" 19 "log" 20 "os" 21 "regexp" 22 ) 23 24 func main() { 25 // Get the OS and architecture (using GOARCH_TARGET if it exists) 26 goos := os.Getenv("GOOS") 27 goarch := os.Getenv("GOARCH_TARGET") 28 if goarch == "" { 29 goarch = os.Getenv("GOARCH") 30 } 31 // Check that we are using the Docker-based build system if we should be. 32 if goos == "linux" { 33 if os.Getenv("GOLANG_SYS_BUILD") != "docker" { 34 os.Stderr.WriteString("In the Docker-based build system, mkpost should not be called directly.\n") 35 os.Stderr.WriteString("See README.md\n") 36 os.Exit(1) 37 } 38 } 39 40 b, err := ioutil.ReadAll(os.Stdin) 41 if err != nil { 42 log.Fatal(err) 43 } 44 45 // Intentionally export __val fields in Fsid and Sigset_t 46 valRegex := regexp.MustCompile(`type (Fsid|Sigset_t) struct {(\s+)X__val(\s+\S+\s+)}`) 47 b = valRegex.ReplaceAll(b, []byte("type $1 struct {${2}Val$3}")) 48 49 // Intentionally export __fds_bits field in FdSet 50 fdSetRegex := regexp.MustCompile(`type (FdSet) struct {(\s+)X__fds_bits(\s+\S+\s+)}`) 51 b = fdSetRegex.ReplaceAll(b, []byte("type $1 struct {${2}Bits$3}")) 52 53 // If we have empty Ptrace structs, we should delete them. Only s390x emits 54 // nonempty Ptrace structs. 55 ptraceRexexp := regexp.MustCompile(`type Ptrace((Psw|Fpregs|Per) struct {\s*})`) 56 b = ptraceRexexp.ReplaceAll(b, nil) 57 58 // Replace the control_regs union with a blank identifier for now. 59 controlRegsRegex := regexp.MustCompile(`(Control_regs)\s+\[0\]uint64`) 60 b = controlRegsRegex.ReplaceAll(b, []byte("_ [0]uint64")) 61 62 // Remove fields that are added by glibc 63 // Note that this is unstable as the identifers are private. 64 removeFieldsRegex := regexp.MustCompile(`X__glibc\S*`) 65 b = removeFieldsRegex.ReplaceAll(b, []byte("_")) 66 67 // Convert [65]int8 to [65]byte in Utsname members to simplify 68 // conversion to string; see golang.org/issue/20753 69 convertUtsnameRegex := regexp.MustCompile(`((Sys|Node|Domain)name|Release|Version|Machine)(\s+)\[(\d+)\]u?int8`) 70 b = convertUtsnameRegex.ReplaceAll(b, []byte("$1$3[$4]byte")) 71 72 // Convert [1024]int8 to [1024]byte in Ptmget members 73 convertPtmget := regexp.MustCompile(`([SC]n)(\s+)\[(\d+)\]u?int8`) 74 b = convertPtmget.ReplaceAll(b, []byte("$1[$3]byte")) 75 76 // Remove spare fields (e.g. in Statx_t) 77 spareFieldsRegex := regexp.MustCompile(`X__spare\S*`) 78 b = spareFieldsRegex.ReplaceAll(b, []byte("_")) 79 80 // Remove cgo padding fields 81 removePaddingFieldsRegex := regexp.MustCompile(`Pad_cgo_\d+`) 82 b = removePaddingFieldsRegex.ReplaceAll(b, []byte("_")) 83 84 // Remove padding, hidden, or unused fields 85 removeFieldsRegex = regexp.MustCompile(`\b(X_\S+|Padding)`) 86 b = removeFieldsRegex.ReplaceAll(b, []byte("_")) 87 88 // Remove the first line of warning from cgo 89 b = b[bytes.IndexByte(b, '\n')+1:] 90 // Modify the command in the header to include: 91 // mkpost, our own warning, and a build tag. 92 replacement := fmt.Sprintf(`$1 | go run mkpost.go 93 // Code generated by the command above; see README.md. DO NOT EDIT. 94 95 // +build %s,%s`, goarch, goos) 96 cgoCommandRegex := regexp.MustCompile(`(cgo -godefs .*)`) 97 b = cgoCommandRegex.ReplaceAll(b, []byte(replacement)) 98 99 // gofmt 100 b, err = format.Source(b) 101 if err != nil { 102 log.Fatal(err) 103 } 104 105 os.Stdout.Write(b) 106 }