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authorRich Felker <dalias@aerifal.cx>2020-07-06 18:46:57 -0400
committerRich Felker <dalias@aerifal.cx>2020-07-06 18:46:57 -0400
commit52ee0dd6d5ccefcbf9b55748896c85801bfafd17 (patch)
tree81c28d3754b408c4c067316591aeba85c8fa3d8a /src/ldso
parent7cc9496a18c3fa665c286b8be41d790c795e0171 (diff)
downloadmusl-52ee0dd6d5ccefcbf9b55748896c85801bfafd17.tar.gz
fix async-cancel-safety of pthread_cancel
the previous commit addressing async-signal-safety issues around pthread_kill did not fully fix pthread_cancel, which is also required (albeit rather irrationally) to be async-cancel-safe. without blocking implementation-internal signals, it's possible that, when async cancellation is enabled, a cancel signal sent by another thread interrupts pthread_kill while the killlock for a targeted thread is held. as a result, the calling thread will terminate due to cancellation without ever unlocking the targeted thread's killlock, and thus the targeted thread will be unable to exit.
Diffstat (limited to 'src/ldso')
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