std: abort the process on failure to allocate a TLS key #141455
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The panic machinery uses TLS, so panicking if no TLS keys are left can lead to infinite recursion (see rust-lang#140798 (comment)). Rather than having separate logic for the panic count and the thread name, just always abort the process if a TLS key allocation fails. This also has the benefit of aligning the key-based TLS implementation with the documentation, which does not mention that a panic could also occur because of resource exhaustion.
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The reasoning at #140798 (comment) makes sense to me and this diff is straightforward enough, r=me with green CI. It would be nice if somebody (@Berrysoft?) could confirm that we get an abort rather than the overflow with this patch. (if this comment posts about 4 times, blame it on the apparent github outage) |
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The panic machinery uses TLS, so panicking if no TLS keys are left can lead to infinite recursion (see #140798 (comment)). Rather than having separate logic for the panic count and the thread name, just always abort the process if a TLS key allocation fails. This also has the benefit of aligning the key-based TLS implementation with the documentation, which does not mention that a panic could also occur because of resource exhaustion.