File: vdso.go

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (54 lines) | stat: -rw-r--r-- 1,004 bytes parent folder | download | duplicates (3) 
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
 
// Copyright 2019 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.

// Invoke signal hander in the VDSO context (see issue 32912).

package main

import (
	"fmt"
	"os"
	"runtime/pprof"
	"time"
)

func init() {
	register("SignalInVDSO", signalInVDSO)
}

func signalInVDSO() {
	f, err := os.CreateTemp("", "timeprofnow")
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

	if err := pprof.StartCPUProfile(f); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

	t0 := time.Now()
	t1 := t0
	// We should get a profiling signal 100 times a second,
	// so running for 1 second should be sufficient.
	for t1.Sub(t0) < time.Second {
		t1 = time.Now()
	}

	pprof.StopCPUProfile()

	name := f.Name()
	if err := f.Close(); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

	if err := os.Remove(name); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

	fmt.Println("success")
}