From 99b8a25e941e54537bf39ca2f265c345f393f112 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 7 May 2011 23:23:58 -0400 Subject: 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. --- src/internal/pthread_impl.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'src/internal/pthread_impl.h') diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h index 049f5dfb..24cbeb25 100644 --- a/src/internal/pthread_impl.h +++ b/src/internal/pthread_impl.h @@ -75,9 +75,12 @@ struct __timer { #include "pthread_arch.h" -#define SIGCANCEL 32 -#define SIGSYSCALL 33 -#define SIGTIMER 34 +#define SIGTIMER 32 +#define SIGCANCEL 33 +#define SIGSYSCALL 34 + +#define SIGPT_SET ((sigset_t){{[sizeof(long)==4] = 3<<(32*(sizeof(long)>4))}}) +#define SIGTIMER_SET ((sigset_t){{ 0x80000000 }}) int __set_thread_area(void *); int __libc_sigaction(int, const struct sigaction *, struct sigaction *); -- cgit v1.2.1