Add debug docs.

README.md

@@ -226,6 +226,11 @@ If you encounter any problem with EAF, please use command `emacs -q` with a mini
 
 If the problem persists, please [report bug here](https://github.com/manateelazycat/emacs-application-framework/issues/new).
 
+If you got segfault error, please use the following way to collect crash information:
+1. Install gdb and turn on option `eaf-enable-debug`
+2. Use command `eaf-stop-process` stop current process
+3. Restart eaf, send issue with `*eaf*` buffer content when next crash
+
 ## Join Us
 Do you want to make Emacs a real "operating system"?
 

README.zh-CN.md

@@ -218,6 +218,11 @@ Markdown预览程序依赖grip，你需要访问[Github Personal access token](h
 
 如果```emacs -q```环境下问题依旧，请到[这里](https://github.com/manateelazycat/emacs-application-framework/issues/new)反馈。
 
+如果你遇到崩溃的问题, 请用下面的方式来收集崩溃信息:
+1. 先安装gdb并打开选项 `eaf-enable-debug`
+2. 使用命令 `eaf-stop-process` 停止EAF进程
+3. 重新打开EAF, 并在下次崩溃时发送 `*eaf*` 的内容
+
 ## 加入我们
 你想把Emacs开发成一个操作系统吗？