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On 11/22/2017 09:34 PM, Josh Triplett wrote:
Given that, I wanted to start a thread about the idea of making getpid() caching, and for that matter other potential uses of pthread_atfork(), robust using MADV_WIPEONFORK when available.
One major issue with the existing PID cache was the interaction with vfork, for calling abort/assert from the subprocess. MADV_WIPEONFORK mappings are not cleared on vfork, so such a PID cache would still return the wrong value in this context.
Thanks, Florian
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