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// Copyright 2020 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package tool
import (
"os"
"runtime"
"runtime/pprof"
)
// installProfiling simplifies cpu/memory profiling for command line tools.
func installProfiling(cpuprof, memprof string) func() {
res := func() {}
if cpuprof != "" {
f, err := os.Create(cpuprof)
if err != nil {
Failf("failed to create cpuprofile file: %v", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
Failf("failed to start cpu profile: %v", err)
}
res = func() {
pprof.StopCPUProfile()
f.Close()
}
}
if memprof != "" {
prev := res
res = func() {
prev()
f, err := os.Create(memprof)
if err != nil {
Failf("failed to create memprofile file: %v", err)
}
defer f.Close()
runtime.GC()
if err := pprof.WriteHeapProfile(f); err != nil {
Failf("failed to write mem profile: %v", err)
}
}
}
return res
}
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