如何使用SIGSEGV的信号处理程序调试程序 [英] How to debug program with signal handler for SIGSEGV

问题描述

我正在为应用程序编写插件，有时会抛出SIGSEGV.但是，该应用程序捕获到信号SIGSEGV.换句话说，该插件是一个动态库.该错误发生在我的插件和动态库中.但是应用程序处理了sSIGSEGV并正常退出.因此，对我来说调试和获取所有堆栈帧的回溯是非常困难的.任何的想法?

I am writing a plugin for a application, occasionally a SIGSEGV would be throw out. However, the application catches the signal SIGSEGV. In other word, The plugin is a dynamical library. The error occurs in my plugin and dynamical library. But the applcation handle the sSIGSEGV and exit normally. So, it is quite difficult for me to debug and get the backtrace of all stack frames. Any idea?

当前，我正在使用gdb作为调试工具.

Currently I am using gdb as debug tool.

推荐答案

GDB 将在应用程序执行之前捕获SIGSEGV.

GDB will catch SIGSEGV before the application does.

您在评论洛根答案时所描述的内容没有任何意义.

What you described in comment to Logan's answer makes no sense.

我怀疑真正发生的事情是该应用程序创建了一个新进程，并且仅在另一个进程中获得了SIGSEGV，而不是您将GDB附加到的那个进程.

I suspect what's really happening is that the application creates a new process, and only gets SIGSEGV in that other process, not the one you attached GDB to.

如果我的猜测正确，以下命令可能会有用:

The following commands may be useful if my guess is correct:

(gdb) catch fork
(gdb) catch vfork
(gdb) set follow-fork-mode child

您可能还想编辑和扩展您的问题:

You might also want to edit and expand your question:

• 您怎么知道 首先是SIGSEGV?
• 发布与GDB的交互日志也可能很有用.

• how do you know there is a SIGSEGV to begin with?
• Posting a log of your interaction with GDB may also prove useful.

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