57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package capture
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
"runtime/debug"
|
|
"time"
|
|
)
|
|
|
|
const crashLogFileName = "crashlogC.log"
|
|
|
|
func goSafe(label string, cancel context.CancelFunc, fn func()) {
|
|
go func() {
|
|
defer recoverAndLog(label, cancel)
|
|
fn()
|
|
}()
|
|
}
|
|
|
|
func recoverAndLog(label string, cancel context.CancelFunc) {
|
|
if r := recover(); r != nil {
|
|
reason := fmt.Sprintf("%s panic: %v", label, r)
|
|
stack := debug.Stack()
|
|
path := writeCrashLog(reason, stack)
|
|
log.Printf("[panic] %s (see %s)", reason, path)
|
|
if cancel != nil {
|
|
cancel()
|
|
}
|
|
}
|
|
}
|
|
|
|
func writeCrashLog(reason string, stack []byte) string {
|
|
dir := os.TempDir()
|
|
_ = os.MkdirAll(dir, 0700)
|
|
path := filepath.Join(dir, crashLogFileName)
|
|
|
|
file, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
|
|
if err != nil {
|
|
log.Printf("[panic] failed to open crash log %s: %v", path, err)
|
|
return path
|
|
}
|
|
defer file.Close()
|
|
|
|
timestamp := time.Now().UTC().Format(time.RFC3339)
|
|
_, _ = fmt.Fprintf(file, "\n=== %s ===\n", timestamp)
|
|
_, _ = fmt.Fprintf(file, "GOOS=%s GOARCH=%s\n", runtime.GOOS, runtime.GOARCH)
|
|
_, _ = fmt.Fprintf(file, "Reason: %s\n", reason)
|
|
if len(stack) > 0 {
|
|
_, _ = fmt.Fprintf(file, "Stack:\n%s\n", string(stack))
|
|
}
|
|
|
|
return path
|
|
}
|