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Re: [patch] libstdc++/58038 libstdc++/60421 fix overflows in std::this_thread::sleep_for()

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Sat, 11 Apr 2015 12:50:51 +0100
Subject: Re: [patch] libstdc++/58038 libstdc++/60421 fix overflows in std::this_thread::sleep_for()
Authentication-results: sourceware.org; auth=none
References: <20150326195919 dot GM9755 at redhat dot com>

On 26/03/15 19:59 +0000, Jonathan Wakely wrote:

We have a couple of bugs where durations with unsigned representations
result in negative or huge time_t values, which result in not sleeping
at all or sleeping for billions of years (or merely for decades if you
have a 32-bit time_t).

This change simply returns early for time points in the past or
negative durations.

Tested x86_64-linux, powerpc64le-linux, committed to trunk.


Also committed to the 4.9 branch.

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