Truncate thread names on Linux and Apple targets These targets have system limits on the thread names, 16 and 64 bytes respectively, and `pthread_setname_np` returns an error if the name is longer. However, we're not in a context that can propagate errors when we call this, and we used to implicitly truncate on Linux with `prctl`, so now we manually truncate these names ahead of time. r? ``````@thomcc`````` |
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