Alexander Sandler Alexander Sandler - 1 month ago 8
Linux Question

Getting a backtrace of other thread

In Linux, to get a backtrace you can use backtrace() library call, but it only returns backtrace of current thread. Is there any way to get a backtrace of some other thread, assuming I know it's TID (or pthread_t) and I can guarantee it sleeps?

It seems that libunwind (http://www.nongnu.org/libunwind/) project can help. The problem is that it is not supported by CentOS, so I prefer not to use it.

Any other ideas?
Thanks.

Answer

Signal Handling with the help of backtrace can solve your purpose.

I mean if you have a PID of the Thread, you can raise a signal for that thread. and in the handler you can use the backtrace. since the handler would be executing in that partucular thread, the backtrace there would be the output what you are needed.

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