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Fri Apr  5 17:43:41 1996  Miles Bader  <miles@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/i386/sigreturn.c (__sigreturn): Store
	MACH_PORT_DEAD in the thread reply-port variable before destroying
	the signal handler's reply port to avoid infinite recursion.
	* sysdeps/mach/hurd/mig-reply.c (__mig_dealloc_reply_port): Only
	attempt to destroy PORT if it's a valid port name.
This commit is contained in:
Miles Bader 1996-04-06 01:51:07 +00:00
parent aa0e1b599c
commit 786db2208e
2 changed files with 20 additions and 2 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
Fri Apr 5 17:43:41 1996 Miles Bader <miles@gnu.ai.mit.edu>
* sysdeps/mach/hurd/i386/sigreturn.c (__sigreturn): Store
MACH_PORT_DEAD in the thread reply-port variable before destroying
the signal handler's reply port to avoid infinite recursion.
* sysdeps/mach/hurd/mig-reply.c (__mig_dealloc_reply_port): Only
attempt to destroy PORT if it's a valid port name.
Wed Apr 3 17:10:44 1996 Roland McGrath <roland@whiz-bang.gnu.ai.mit.edu>
* extra-lib.mk: Put libs in $(common-objpfx) instead of $(objpfx).

14
sysdeps/mach/hurd/i386/sigreturn.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
/* Copyright (C) 1991, 1992, 1994, 1995, 1996 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
@ -80,7 +80,17 @@ __sigreturn (struct sigcontext *scp)
reply_port =
(mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY);
if (*reply_port)
__mach_port_destroy (__mach_task_self (), *reply_port);
{
mach_port_t port = *reply_port;
/* Assigning MACH_PORT_DEAD here tells libc's mig_get_reply_port not to
get another reply port, but avoids mig_dealloc_reply_port trying to
deallocate it after the receive fails (which it will, because the
reply port will be bogus, whether we do this or not). */
*reply_port = MACH_PORT_DEAD;
__mach_port_destroy (__mach_task_self (), port);
}
*reply_port = scp->sc_reply_port;
if (scp->sc_fpused)