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2008-08-06 Jan Kratochvil <jan.kratochvil@redhat.com>

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* util.c (CLONE_VM): Define if not defined already.
	(setbpt): Clear CLONE_VM in the case we already clear CLONE_VFORK for
	SYS_clone and SYS_clone2.
	Reported by Michal Nowak.
	Fixes RH#455078.
This commit is contained in:
Jan Kratochvil 2008-08-06 21:43:35 +00:00
parent 3aba527d45
commit 8fc9575e0b
1 changed files with 13 additions and 6 deletions

19
util.c

@ -1284,6 +1284,9 @@ struct tcb *tcp;
#ifndef CLONE_VFORK
# define CLONE_VFORK 0x00004000
#endif
#ifndef CLONE_VM
# define CLONE_VM 0x00000100
#endif
#ifndef CLONE_STOPPED
# define CLONE_STOPPED 0x02000000
#endif
@ -1537,15 +1540,19 @@ struct tcb *tcp;
#ifdef SYS_clone2
case SYS_clone2:
#endif
/* ia64 calls directly `clone (CLONE_VFORK)' contrary to
x86 SYS_vfork above. Even on x86 we turn the vfork
semantics into plain fork - each application must not
depend on the vfork specifics according to POSIX. We
would hang waiting for the parent resume otherwise. */
/* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
contrary to x86 SYS_vfork above. Even on x86 we turn the
vfork semantics into plain fork - each application must not
depend on the vfork specifics according to POSIX. We would
hang waiting for the parent resume otherwise. We need to
clear also CLONE_VM but only in the CLONE_VFORK case as
otherwise we would break pthread_create. */
if ((arg_setup (tcp, &state) < 0
|| set_arg0 (tcp, &state,
(tcp->u_arg[arg0_index] | CLONE_PTRACE)
& ~CLONE_VFORK) < 0
& ~(tcp->u_arg[arg0_index] & CLONE_VFORK
? CLONE_VFORK | CLONE_VM : 0)) < 0
|| arg_finish_change (tcp, &state) < 0))
return -1;
tcp->flags |= TCB_BPTSET;