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authorUlrich Drepper <drepper@redhat.com>1999-09-18 23:21:25 +0000
committerUlrich Drepper <drepper@redhat.com>1999-09-18 23:21:25 +0000
commit9cf44e65641b946949db0bbf3059901ff2ef08cb (patch)
treec46268cea32dfcb5e08b5e7846281cc1babfab08 /linuxthreads/signals.c
parentc68d04feb7fca7f45eb30c286812092653e24ca1 (diff)
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Update.
1999-09-18 Ulrich Drepper <drepper@cygnus.com> * pthread.c (pthread_handle_sigrestart_rt): New function. Use this instead of pthread_handle_sigrestart if the signal is an RT signal. * signals.c: Handle passing through of sighandler arguments also for real-time signals.
Diffstat (limited to 'linuxthreads/signals.c')
-rw-r--r--linuxthreads/signals.c51
1 files changed, 43 insertions, 8 deletions
diff --git a/linuxthreads/signals.c b/linuxthreads/signals.c
index 1293ce5..df375e8 100644
--- a/linuxthreads/signals.c
+++ b/linuxthreads/signals.c
@@ -19,6 +19,7 @@
#include "pthread.h"
#include "internals.h"
#include "spinlock.h"
+#include <ucontext.h>
#include <sigcontextinfo.h>
int pthread_sigmask(int how, const sigset_t * newmask, sigset_t * oldmask)
@@ -69,7 +70,11 @@ int pthread_kill(pthread_t thread, int signo)
/* User-provided signal handlers */
typedef void (*arch_sighandler_t) __PMT ((int, SIGCONTEXT));
-static arch_sighandler_t sighandler[NSIG];
+static union
+{
+ arch_sighandler_t old;
+ void (*rt) (int, struct siginfo *, struct ucontext *);
+} sighandler[NSIG];
/* The wrapper around user-provided signal handlers */
static void pthread_sighandler(int signo, SIGCONTEXT ctx)
@@ -88,7 +93,30 @@ static void pthread_sighandler(int signo, SIGCONTEXT ctx)
in_sighandler = THREAD_GETMEM(self, p_in_sighandler);
if (in_sighandler == NULL)
THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME);
- sighandler[signo](signo, SIGCONTEXT_EXTRA_ARGS ctx);
+ sighandler[signo].old(signo, SIGCONTEXT_EXTRA_ARGS ctx);
+ if (in_sighandler == NULL)
+ THREAD_SETMEM(self, p_in_sighandler, NULL);
+}
+
+/* The same, this time for real-time signals. */
+static void pthread_sighandler_rt(int signo, struct siginfo *si,
+ struct ucontext *uc)
+{
+ pthread_descr self = thread_self();
+ char * in_sighandler;
+ /* If we're in a sigwait operation, just record the signal received
+ and return without calling the user's handler */
+ if (THREAD_GETMEM(self, p_sigwaiting)) {
+ THREAD_SETMEM(self, p_sigwaiting, 0);
+ THREAD_SETMEM(self, p_signal, signo);
+ return;
+ }
+ /* Record that we're in a signal handler and call the user's
+ handler function */
+ in_sighandler = THREAD_GETMEM(self, p_in_sighandler);
+ if (in_sighandler == NULL)
+ THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME);
+ sighandler[signo].rt(signo, si, uc);
if (in_sighandler == NULL)
THREAD_SETMEM(self, p_in_sighandler, NULL);
}
@@ -110,7 +138,12 @@ int sigaction(int sig, const struct sigaction * act,
newact = *act;
if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL
&& sig > 0 && sig < NSIG)
- newact.sa_handler = (__sighandler_t) pthread_sighandler;
+ {
+ if (sig >= SIGRTMIN)
+ newact.sa_handler = (__sighandler_t) pthread_sighandler_rt;
+ else
+ newact.sa_handler = (__sighandler_t) pthread_sighandler;
+ }
newactp = &newact;
}
else
@@ -120,9 +153,11 @@ int sigaction(int sig, const struct sigaction * act,
if (sig > 0 && sig < NSIG)
{
if (oact != NULL)
- oact->sa_handler = (__sighandler_t) sighandler[sig];
+ oact->sa_handler = (__sighandler_t) sighandler[sig].old;
if (act)
- sighandler[sig] = (arch_sighandler_t) act->sa_handler;
+ /* For the assignment is does not matter whether it's a normal
+ or real-time signal. */
+ sighandler[sig].old = (arch_sighandler_t) act->sa_handler;
}
return 0;
}
@@ -153,9 +188,9 @@ int sigwait(const sigset_t * set, int * sig)
s != __pthread_sig_cancel &&
s != __pthread_sig_debug) {
sigdelset(&mask, s);
- if (sighandler[s] == NULL ||
- sighandler[s] == (arch_sighandler_t) SIG_DFL ||
- sighandler[s] == (arch_sighandler_t) SIG_IGN) {
+ if (sighandler[s].old == NULL ||
+ sighandler[s].old == (arch_sighandler_t) SIG_DFL ||
+ sighandler[s].old == (arch_sighandler_t) SIG_IGN) {
sa.sa_handler = pthread_null_sighandler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;