l3fwd-cat: calling unsafe functions from signal handler

https://bugs.dpdk.org/show_bug.cgi?id=1194

Bug ID: 1194
Summary: l3fwd-cat: calling unsafe functions from signal
handler
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: examples
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---

The handling of SIGINT and SIGTERM in the l2fwd-cat example is unsafe and non-portable. The signal handler could be called by any thread at any time.

The current method (copy/paste from testpmd?) is to call cat_exit() in the signal handler. This may race with other threads and cause problems.

The better solution is to set a flag in signal handler and then do the shutdown aft er the main loop exits.

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