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//go:build pprof
// +build pprof
package fzf
import (
"fmt"
"os"
"runtime"
"runtime/pprof"
"github.com/junegunn/fzf/src/util"
)
func (o *Options) initProfiling() error {
if o.CPUProfile != "" {
f, err := os.Create(o.CPUProfile)
if err != nil {
return fmt.Errorf("could not create CPU profile: %w", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
return fmt.Errorf("could not start CPU profile: %w", err)
}
util.AtExit(func() {
pprof.StopCPUProfile()
if err := f.Close(); err != nil {
fmt.Fprintln(os.Stderr, "Error: closing cpu profile:", err)
}
})
}
stopProfile := func(name string, f *os.File) {
if err := pprof.Lookup(name).WriteTo(f, 0); err != nil {
fmt.Fprintf(os.Stderr, "Error: could not write %s profile: %v\n", name, err)
}
if err := f.Close(); err != nil {
fmt.Fprintf(os.Stderr, "Error: closing %s profile: %v\n", name, err)
}
}
if o.MEMProfile != "" {
f, err := os.Create(o.MEMProfile)
if err != nil {
return fmt.Errorf("could not create MEM profile: %w", err)
}
util.AtExit(func() {
runtime.GC()
stopProfile("allocs", f)
})
}
if o.BlockProfile != "" {
runtime.SetBlockProfileRate(1)
f, err := os.Create(o.BlockProfile)
if err != nil {
return fmt.Errorf("could not create BLOCK profile: %w", err)
}
util.AtExit(func() { stopProfile("block", f) })
}
if o.MutexProfile != "" {
runtime.SetMutexProfileFraction(1)
f, err := os.Create(o.MutexProfile)
if err != nil {
return fmt.Errorf("could not create MUTEX profile: %w", err)
}
util.AtExit(func() { stopProfile("mutex", f) })
}
return nil
}
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