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authorRich Felker <dalias@aerifal.cx>2011-02-19 10:51:13 -0500
committerRich Felker <dalias@aerifal.cx>2011-02-19 10:51:13 -0500
commita49c119276742d7d212fb88f83a8f559ca549e72 (patch)
treea7da9765943b2858b98beee765258ae3b69a8ea2 /src/signal
parentfb11b6b85e1e01daf17228be32d7f98b47517363 (diff)
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prevent sigprocmask/pthread_sigmask from blocking implementation signals
this code was wrongly disabled because the old version was trying to be too clever and didn't work. replaced it with a simple version for now.
Diffstat (limited to 'src/signal')
-rw-r--r--src/signal/sigprocmask.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/signal/sigprocmask.c b/src/signal/sigprocmask.c
index e89f8765..db27f12a 100644
--- a/src/signal/sigprocmask.c
+++ b/src/signal/sigprocmask.c
@@ -1,6 +1,7 @@
#include <signal.h>
#include "syscall.h"
#include "libc.h"
+#include "pthread_impl.h"
int __libc_sigprocmask(int how, const sigset_t *set, sigset_t *old)
{
@@ -10,11 +11,12 @@ int __libc_sigprocmask(int how, const sigset_t *set, sigset_t *old)
int __sigprocmask(int how, const sigset_t *set, sigset_t *old)
{
sigset_t tmp;
- /* Quickly mask out bits 32 and 33 (thread control signals) */
- if (0 && how != SIG_UNBLOCK && (set->__bits[4/sizeof *set->__bits] & 3UL<<(32&8*sizeof *set->__bits-1))) {
+ /* Disallow blocking thread control signals */
+ if (how != SIG_UNBLOCK) {
tmp = *set;
set = &tmp;
- tmp.__bits[4/sizeof *set->__bits] &= ~(3UL<<(32&8*sizeof *set->__bits-1));
+ sigdelset(&tmp, SIGCANCEL);
+ sigdelset(&tmp, SIGSYSCALL);
}
return __libc_sigprocmask(how, set, old);
}