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Added a sleep on the parent so that the parent cannot die while the child

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needs to access information from it.
This commit is contained in:
manu 2002-08-12 20:11:38 +00:00
parent 3e5aabbe90
commit 08b6896ef2
1 changed files with 24 additions and 5 deletions
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29
sys/compat/irix/irix_prctl.c
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@ -1,4 +1,4 @@
/* $NetBSD: irix_prctl.c,v 1.14 2002/08/02 23:02:51 manu Exp $ */
/* $NetBSD: irix_prctl.c,v 1.15 2002/08/12 20:11:38 manu Exp $ */
/*-
* Copyright (c) 2001-2002 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: irix_prctl.c,v 1.14 2002/08/02 23:02:51 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: irix_prctl.c,v 1.15 2002/08/12 20:11:38 manu Exp $");
#include <sys/errno.h>
#include <sys/types.h>
@ -75,6 +75,7 @@ struct irix_sproc_child_args {
int isc_inh;
struct proc *isc_parent;
struct irix_share_group *isc_share_group;
int isc_child_done;
};
static void irix_sproc_child __P((struct irix_sproc_child_args *));
static int irix_sproc __P((void *, unsigned int, void *, caddr_t, size_t,
@ -375,6 +376,7 @@ irix_sproc(entry, inh, arg, sp, len, pid, p, retval)
isc->isc_inh = inh;
isc->isc_parent = p;
isc->isc_share_group = isg;
isc->isc_child_done = 0;
if (inh & IRIX_PR_SADDR)
ied->ied_shareaddr = 1;
@ -383,6 +385,15 @@ irix_sproc(entry, inh, arg, sp, len, pid, p, retval)
(void *)irix_sproc_child, (void *)isc, retval, &p2)) != 0)
return error;
/*
* The child needs the parent to stay alive until it has
* copied a few things from it. We sleep whatever happen
* until the child is done.
*/
while (!isc->isc_child_done)
(void)tsleep(&isc->isc_child_done, PZERO, "sproc", 0);
free(isc, M_TEMP);
retval[0] = (register_t)p2->p_pid;
retval[1] = 0;
@ -425,7 +436,8 @@ irix_sproc_child(isc)
error = uvm_map_extract(&parent->p_vmspace->vm_map,
vm_min, vm_len, &p2->p_vmspace->vm_map, &dstaddrp, 0);
if (error != 0) {
free(isc, M_TEMP);
isc->isc_child_done = 1;
wakeup(&isc->isc_child_done);
killproc(p2, "failed to initialize share group VM");
}
@ -436,7 +448,8 @@ irix_sproc_child(isc)
/* Remap the process private arena (unshared) */
error = irix_prda_init(p2);
if (error != 0) {
free(isc, M_TEMP);
isc->isc_child_done = 1;
wakeup(&isc->isc_child_done);
killproc(p2, "failed to initialize share group VM");
}
}
@ -500,7 +513,13 @@ irix_sproc_child(isc)
if (inh & IRIX_PR_SADDR)
ied->ied_shareaddr = 1;
free(isc, M_TEMP);
/*
* wakeup the parent as it can now die without
* causing a panic in the child.
*/
isc->isc_child_done = 1;
wakeup(&isc->isc_child_done);
/*
* Return to userland for a newly created process
*/