go gprof 源码
golang gprof 代码
文件路径：/src/runtime/testdata/testprogcgo/gprof.go
// Copyright 2021 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 taking a goroutine profile with C traceback.
/*
// Defined in gprof_c.c.
void CallGoSleep(void);
void gprofCgoTraceback(void* parg);
void gprofCgoContext(void* parg);
*/
import "C"
import (
"fmt"
"io"
"runtime"
"runtime/pprof"
"time"
"unsafe"
)
func init() {
register("GoroutineProfile", GoroutineProfile)
}
func GoroutineProfile() {
runtime.SetCgoTraceback(0, unsafe.Pointer(C.gprofCgoTraceback), unsafe.Pointer(C.gprofCgoContext), nil)
go C.CallGoSleep()
go C.CallGoSleep()
go C.CallGoSleep()
time.Sleep(1 * time.Second)
prof := pprof.Lookup("goroutine")
prof.WriteTo(io.Discard, 1)
fmt.Println("OK")
}
//export GoSleep
func GoSleep() {
time.Sleep(time.Hour)
}
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