• Ian Lance Taylor's avatar
    runtime: unblock special glibc signals on each thread · ffd7d317
    Ian Lance Taylor authored
    Glibc uses some special signals for special thread operations.  These
    signals will be used in programs that use cgo and invoke certain glibc
    functions, such as setgid.  In order for this to work, these signals
    need to not be masked by any thread.  Before this change, they were
    being masked by programs that used os/signal.Notify, because it
    carefully masks all non-thread-specific signals in all threads so that a
    dedicated thread will collect and report those signals (see ensureSigM
    in signal1_unix.go).
    
    This change adds the two glibc special signals to the set of signals
    that are unmasked in each thread.
    
    Fixes #12498.
    
    Change-Id: I797d71a099a2169c186f024185d44a2e1972d4ad
    Reviewed-on: https://go-review.googlesource.com/14297Reviewed-by: 's avatarDavid Crawshaw <crawshaw@golang.org>
    ffd7d317
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