Re: Is gcc thread-unsafe?

From: Chris Friesen
Date: Fri Oct 26 2007 - 13:55:53 EST


Andrew Haley wrote:

We're listening, really. It's unacceptable that gcc should break
code.

In that case a conversion of a conditional branch to an unconditional write to a visible variable is not an acceptable behaviour. Aside from the kernel issues, it would break any number of threaded userspace apps.

As was mentioned elsewhere, it's akin to sprinkling

int j = i; i = j;

throughout the code. If "i" is accessed by multiple threads, this is not allowed unless a lock is held.

Chris
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