Commit Graph

4 Commits

Author SHA1 Message Date
Rich Felker 99b8a25e94 overhaul implementation-internal signal protections
the new approach relies on the fact that the only ways to create
sigset_t objects without invoking UB are to use the sig*set()
functions, or from the masks returned by sigprocmask, sigaction, etc.
or in the ucontext_t argument to a signal handler. thus, as long as
sigfillset and sigaddset avoid adding the "protected" signals, there
is no way the application will ever obtain a sigset_t including these
bits, and thus no need to add the overhead of checking/clearing them
when sigprocmask or sigaction is called.

note that the old code actually *failed* to remove the bits from
sa_mask when sigaction was called.

the new implementations are also significantly smaller, simpler, and
faster due to ignoring the useless "GNU HURD signals" 65-1024, which
are not used and, if there's any sanity in the world, never will be
used.
2011-05-07 23:23:58 -04:00
Rich Felker 92b52b70e8 remove -Wno-pointer-sign example from dist/config.mak 2011-03-25 16:50:49 -04:00
Rich Felker 6d333355e7 document in config.mak sample that x86_64 is supported 2011-02-17 18:30:41 -05:00
Rich Felker 0b44a0315b initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00