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gdb apparently misses SIGTRAP

From: Sudhakar Gosukonda <list dot sudhakar at gmail dot com>
To: gdb at sourceware dot org
Date: Wed, 8 Feb 2017 13:03:15 +0530
Subject: gdb apparently misses SIGTRAP
Authentication-results: sourceware.org; auth=none

Hi,

I have gdb-7.11.1. If I do step next ('n'), calls like epoll_wait and
sem_wait are hanging. In case of epoll_wait, in the wireshark trace I
could see the packets are received. From another terminal if I send
SIGTRAP then I get control back with the data being received.

Any ideas why this could be happening and more importantly how to avoid it?

thanks
sudhakar

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