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authorRoland McGrath <roland@gnu.org>1996-01-04 00:06:01 +0000
committerRoland McGrath <roland@gnu.org>1996-01-04 00:06:01 +0000
commit6df1b2474adfc23c9cfff5a4496108bea0c37511 (patch)
tree48bd35ba5b0d766560edde694efec2b791ada613 /hurd/hurdsig.c
parent71733723fb421bd54467d1a27096463ed1dcc2ed (diff)
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Rewritten.cvs/libc-960103
Diffstat (limited to 'hurd/hurdsig.c')
-rw-r--r--hurd/hurdsig.c54
1 files changed, 28 insertions, 26 deletions
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c
index cecc415..290dba8 100644
--- a/hurd/hurdsig.c
+++ b/hurd/hurdsig.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -74,10 +74,11 @@ _hurd_thread_sigstate (thread_t thread)
ss->thread = thread;
__spin_lock_init (&ss->lock);
- /* Initialze default state. */
+ /* Initialize default state. */
__sigemptyset (&ss->blocked);
__sigemptyset (&ss->pending);
memset (&ss->sigaltstack, 0, sizeof (ss->sigaltstack));
+ ss->preempters = NULL;
ss->suspended = 0;
ss->intr_port = MACH_PORT_NULL;
ss->context = NULL;
@@ -231,6 +232,7 @@ interrupted_reply_port_location (struct machine_thread_all_state *thread_state,
return portloc;
}
+#include <hurd/sigpreempt.h>
#include "intr-msg.h"
/* SS->thread is suspended.
@@ -404,9 +406,8 @@ abort_all_rpcs (int signo, struct machine_thread_all_state *state, int live)
}
}
-
-struct hurd_signal_preempt *_hurd_signal_preempt[NSIG];
-struct mutex _hurd_signal_preempt_lock;
+struct hurd_signal_preempter *_hurdsig_preempters;
+sigset_t _hurdsig_preempted_set;
/* Mask of stop signals. */
#define STOPSIGS (sigmask (SIGTTIN) | sigmask (SIGTTOU) | \
@@ -423,9 +424,8 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
error_t err;
struct machine_thread_all_state thread_state;
enum { stop, ignore, core, term, handle } act;
+ struct hurd_signal_preempter *pe;
sighandler_t handler;
- struct hurd_signal_preempt *pe;
- sighandler_t (*preempt) (thread_t, int, long int, int) = NULL;
sigset_t pending;
int ss_suspended;
@@ -521,35 +521,37 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
thread_state.set = 0; /* We know nothing. */
- /* Check for a preempted signal. Preempted signals
- can arrive during critical sections. */
- __mutex_lock (&_hurd_signal_preempt_lock);
- for (pe = _hurd_signal_preempt[signo]; pe != NULL; pe = pe->next)
- if (pe->handler && sigcode >= pe->first && sigcode <= pe->last)
- {
- preempt = pe->handler;
- break;
- }
- __mutex_unlock (&_hurd_signal_preempt_lock);
+ __spin_lock (&ss->lock);
+
+ /* Check for a preempted signal. Preempted signals can arrive during
+ critical sections. */
- handler = SIG_DFL;
- if (preempt)
- /* Let the preempting handler examine the thread.
- If it returns SIG_DFL, we run the normal handler;
- otherwise we use the handler it returns. */
- handler = (*preempt) (ss->thread, signo, sigcode, sigerror);
+ handler = SIG_ERR;
+ for (pe = ss->preempters; pe && handler == SIG_ERR; pe = pe->next)
+ if (HURD_PREEMPT_SIGNAL_P (pe, signo, sigcode))
+ handler = (*pe->preempter) (pe, ss, &signo, &sigcode, &sigerror);
+
+ if (handler == SIG_ERR && (__sigmask (signo) & _hurdsig_preempted_set))
+ {
+ __mutex_lock (&_hurd_siglock);
+ for (pe = _hurdsig_preempters; pe && handler == SIG_ERR; pe = pe->next)
+ if (HURD_PREEMPT_SIGNAL_P (pe, signo, sigcode))
+ handler = (*pe->preempter) (pe, ss, &signo, &sigcode, &sigerror);
+ __mutex_unlock (&_hurd_siglock);
+ }
ss_suspended = 0;
- if (handler != SIG_DFL)
+ if (handler == SIG_IGN)
+ /* Ignore the signal altogether. */
+ act = ignore;
+ if (handler != SIG_ERR)
/* Run the preemption-provided handler. */
act = handle;
else
{
/* No preemption. Do normal handling. */
- __spin_lock (&ss->lock);
-
if (!untraced && (_hurd_exec_flags & EXEC_TRACED))
{
/* We are being traced. Stop to tell the debugger of the signal. */