8dc2499aa6
gotools/ * Makefile.am (go_cmd_cgo_files): Add ast_go118.go (check-go-tool): Copy golang.org/x/tools directories. * Makefile.in: Regenerate. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/384695
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build linux
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package pprof
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import (
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"fmt"
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"regexp"
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"strconv"
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"syscall"
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)
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var versionRe = regexp.MustCompile(`^(\d+)(?:\.(\d+)(?:\.(\d+))).*$`)
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func linuxKernelVersion() (major, minor, patch int, err error) {
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var uname syscall.Utsname
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if err := syscall.Uname(&uname); err != nil {
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return 0, 0, 0, err
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}
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buf := make([]byte, 0, len(uname.Release))
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for _, b := range uname.Release {
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if b == 0 {
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break
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}
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buf = append(buf, byte(b))
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}
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rl := string(buf)
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m := versionRe.FindStringSubmatch(rl)
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if m == nil {
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return 0, 0, 0, fmt.Errorf("error matching version number in %q", rl)
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}
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v, err := strconv.ParseInt(m[1], 10, 64)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing major version %q in %s: %w", m[1], rl, err)
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}
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major = int(v)
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if len(m) >= 3 {
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v, err := strconv.ParseInt(m[2], 10, 64)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing minor version %q in %s: %w", m[2], rl, err)
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}
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minor = int(v)
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}
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if len(m) >= 4 {
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v, err := strconv.ParseInt(m[3], 10, 64)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing patch version %q in %s: %w", m[3], rl, err)
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}
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patch = int(v)
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}
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return
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}
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