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Use spin lock operations on sigstate lock.

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Don't expect _hurd_self_sigstate to lock it.
This commit is contained in:
Roland McGrath 1995-02-07 04:25:56 +00:00
parent 23afbf2338
commit 8548d4c084
2 changed files with 12 additions and 10 deletions
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11
sysdeps/mach/hurd/alpha/sigreturn.c
View File

@ -37,7 +37,8 @@ __sigreturn (struct sigcontext *scp)
return -1;
}
ss = _hurd_self_sigstate (); /* SS->lock now locked. */
ss = _hurd_self_sigstate ();
__spin_lock (&ss->lock);
/* Restore the set of blocked signals, and the intr_port slot. */
ss->blocked = scp->sc_mask;
@ -56,10 +57,10 @@ __sigreturn (struct sigcontext *scp)
the SCP context is doing an interruptible RPC, but the signal
thread will examine us while we are blocked in the sig_post RPC. */
ss->intr_port = MACH_PORT_NULL;
__mutex_unlock (&ss->lock);
__sig_post (_hurd_msgport, 0, __mach_task_self ());
__spin_unlock (&ss->lock);
__msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
/* If a pending signal was handled, sig_post never returned. */
__mutex_lock (&ss->lock);
__spin_lock (&ss->lock);
}
if (scp->sc_onstack)
@ -69,7 +70,7 @@ __sigreturn (struct sigcontext *scp)
abort ();
}
else
__mutex_unlock (&ss->lock);
__spin_unlock (&ss->lock);
/* Destroy the MiG reply port used by the signal handler, and restore the
reply port in use by the thread when interrupted. */

11
sysdeps/mach/hurd/mips/sigreturn.c
View File

@ -33,7 +33,8 @@ __sigreturn (struct sigcontext *scp)
return -1;
}
ss = _hurd_self_sigstate (); /* SS->lock now locked. */
ss = _hurd_self_sigstate ();
__spin_lock (&ss->lock);
/* Restore the set of blocked signals, and the intr_port slot. */
ss->blocked = scp->sc_mask;
@ -52,10 +53,10 @@ __sigreturn (struct sigcontext *scp)
the SCP context is doing an interruptible RPC, but the signal
thread will examine us while we are blocked in the sig_post RPC. */
ss->intr_port = MACH_PORT_NULL;
__mutex_unlock (&ss->lock);
__sig_post (_hurd_msgport, 0, __mach_task_self ());
__spin_unlock (&ss->lock);
__msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
/* If a pending signal was handled, sig_post never returned. */
__mutex_lock (&ss->lock);
__spin_lock (&ss->lock);
}
if (scp->sc_onstack)
@ -65,7 +66,7 @@ __sigreturn (struct sigcontext *scp)
abort ();
}
else
__mutex_unlock (&ss->lock);
__spin_unlock (&ss->lock);
/* Destroy the MiG reply port used by the signal handler, and restore the
reply port in use by the thread when interrupted. */