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de452ad | 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 55 56 57 | // 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.
package main
// Test that SIGPROF received in C code does not crash the process
// looking for the C code's func pointer.
// This is a regression test for issue 14599, where profiling fails when the
// function is the first C function. Exported functions are the first C
// functions, so we use an exported function. Exported functions are created in
// lexicographical order of source files, so this file is named aprof.go to
// ensure its function is first.
// extern void CallGoNop();
import "C"
import (
"bytes"
"fmt"
"runtime/pprof"
"time"
)
func init() {
register("CgoCCodeSIGPROF", CgoCCodeSIGPROF)
}
//export GoNop
func GoNop() {}
func CgoCCodeSIGPROF() {
c := make(chan bool)
go func() {
<-c
start := time.Now()
for i := 0; i < 1e7; i++ {
if i%1000 == 0 {
if time.Since(start) > time.Second {
break
}
}
C.CallGoNop()
}
c <- true
}()
var buf bytes.Buffer
pprof.StartCPUProfile(&buf)
c <- true
<-c
pprof.StopCPUProfile()
fmt.Println("OK")
}
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