/
debug_support.go
78 lines (71 loc) · 1.43 KB
/
debug_support.go
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package appctl
import (
"fmt"
"os"
"runtime"
"runtime/pprof"
"sync"
"github.com/enfein/mieru/pkg/stderror"
)
var (
cpuProfileFile *os.File
mu sync.Mutex
)
func getThreadDump() []byte {
mu.Lock()
defer mu.Unlock()
buf := make([]byte, 16384)
for {
n := runtime.Stack(buf, true)
if n < len(buf) {
buf = buf[:n]
break
}
buf = make([]byte, 4*len(buf))
}
return buf
}
func startCPUProfile(filePath string) error {
mu.Lock()
defer mu.Unlock()
if filePath == "" {
return fmt.Errorf("file path is empty")
}
if cpuProfileFile != nil {
return stderror.ErrAlreadyStarted
}
cpuProfileFile, err := os.Create(filePath)
if err != nil {
return fmt.Errorf("os.Create() failed: %w", err)
}
if err := pprof.StartCPUProfile(cpuProfileFile); err != nil {
return fmt.Errorf("pprof.StartCPUProfile() failed: %w", err)
}
return nil
}
func stopCPUProfile() {
mu.Lock()
defer mu.Unlock()
pprof.StopCPUProfile()
if cpuProfileFile != nil {
cpuProfileFile.Close()
}
cpuProfileFile = nil
}
func getHeapProfile(filePath string) error {
mu.Lock()
defer mu.Unlock()
if filePath == "" {
return fmt.Errorf("file path is empty")
}
heapFile, err := os.Create(filePath)
if err != nil {
return fmt.Errorf("os.Create() failed: %w", err)
}
defer heapFile.Close()
runtime.GC()
if err := pprof.WriteHeapProfile(heapFile); err != nil {
return fmt.Errorf("pprof.WriteHeapProfile() failed: %w", err)
}
return nil
}