inital commit

2026-03-05 00:04:26 -06:00
commit f8515a2883
269 changed files with 47081 additions and 0 deletions
@@ -0,0 +1,56 @@
+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
+}