未生成核心转储文件 [英] Core dump file is not generated

问题描述

每次我的应用程序崩溃时，都不会生成核心转储文件.我记得几天前，在另一台服务器上 生成了它.我正在使用 bash 中的屏幕运行应用程序，如下所示:

Every time, my application crash a core dump file is not generated. I remember that few days ago, on another server it was generated. I'm running the app using screen in bash like this:

#!/bin/bash
ulimit -c unlimited
while true; do ./server; done

如您所见，我正在使用 ulimit -c unlimited 如果我想生成核心转储，这很重要，但是当我遇到分段错误时它仍然不会生成它.我怎样才能让它发挥作用?

As you can see I'm using ulimit -c unlimited which is important if I want to generate a core dump, but it still doesn't generate it, when I got an segmentation fault. How can I make it work?

推荐答案

确保您的当前目录(在崩溃时 -- server 可能会更改目录)是可写的.如果服务器调用 setuid，则该目录必须是该用户可写的.

Make sure your current directory (at the time of crash -- server may change directories) is writable. If the server calls setuid, the directory has to be writable by that user.

同时检查 /proc/sys/kernel/core_pattern.这可能会将核心转储重定向到另一个目录，并且 那个 目录必须是可写的.更多信息这里.

Also check /proc/sys/kernel/core_pattern. That may redirect core dumps to another directory, and that directory must be writable. More info here.

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