特定线程上的gdb nostop SIGSEGV [英] gdb nostop SIGSEGV on a specific thread

问题描述

我有一个程序专门在一个线程上进行段错误处理，但是我遇到另一个线程在进行段错误处理的问题，我想用GDB来捕获它，我发现我可以做到这一点:

I have a program that purposely segfaults on one threads, but I have a problem that the other thread is segfaulting, I'd like to catch it with GDB, I saw that I can:

handle SIGSEGV nostop noprint

但是我只想在故意这样做的线程上这样做.是否可能?

but I'd like to do that only on the thread that purposely does that.. is it possible?

我将解释: 我有2个线程，一个线程是segfaulting(然后恢复(mprotect只读，然后释放内存))，它工作正常，另一个线程做了其他事情，但是可悲的是，有一个bug且它是segfaulting，我想抓住segfault，而不是发生在另一个线程中的其他段.

I'll explain: I have 2 threads, one thread is segfaulting(and recovers(mprotect read only and then releasing memory)), that works fine, the other thread does something else, but sadly, there is a bug and it is segfaulting, I want to catch that segfault, and not the other ones that occur in the other thread.

推荐答案

据我所知，具体取决于操作系统，我假定答案是linux，答案是否"！

As I know, depending on the OS, and I assume linux for my answer and the answer is 'NO'!

Posix异常每个线程可以有一个sigmask，但每个任务只能有一个处理程序.因此，不可能为每个线程设置不同的处理. sigaction将处理整个过程.因此，我看不到gdb更改此方法的方法.

Posix exceptions can have a sigmask per thread but only one handler per task. So it is not possible to set different handling for each thread. sigaction will handle it for the complete process. So I see no way for gdb to change this.

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