What are some common ways to debug segmentation faults in multi-threaded c++ applications?

Question

I am new to threads and have put together a basic command line application using pthread's. I use pthread_create passing a struct as the final param; starting a new thread which calls "void *thread_routine (void *arg)". I have made a few observations worth noting. - The program doesn't always provide the same results - about 10% of the time the program seg faults

What are some good techniques to use when debugging multi-threaded applications in c++?

I think you would get more extended answers on programmers.stackexchange.com — Sergey Kalinichenko, Mar 04 '12 at 16:35

score 0 · Answer 1 · answered Mar 04 '12 at 16:34

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Watch for your shared memmory access and use logging to find errors.

answered Mar 04 '12 at 16:34

jhruby

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score 0 · Answer 2 · answered Mar 04 '12 at 16:38

Segfault is only the visible part of the iceberg. It might be a result of race conditions, and in this case you should focus on ensuring that threads are properly synchronized. Then the remaining segfault should be different than the ones of a single-threaded application.

score 0 · Answer 3 · edited May 23 '17 at 12:03

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You can apposite debugging support tools such as GDB which work fine also for multi-threaded programs. Check out these links:

edited May 23 '17 at 12:03

Community

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answered Mar 04 '12 at 22:10

Matteo

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What are some common ways to debug segmentation faults in multi-threaded c++ applications?

3 Answers3