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Code Issues Releases Activity

MFP4 (106538 + 106541):

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Implement CLONE_VFORK. This fixes the clone05 LTP test.

Submitted by:	rdivacky
This commit is contained in:
Alexander Leidinger 2006-10-15 13:39:40 +00:00
parent 2482245b0c
commit 0a62e03542
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=163374
4 changed files with 22 additions and 0 deletions
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1
sys/amd64/linux32/linux.h
View File

@ -830,6 +830,7 @@ typedef int l_mqd_t;
#define CLONE_FILES 0x400
#define CLONE_SIGHAND 0x800
#define CLONE_PID 0x1000 /* this flag does not exist in linux anymore */
#define CLONE_VFORK 0x4000
#define CLONE_PARENT 0x00008000
#define CLONE_THREAD 0x10000
#define CLONE_SETTLS 0x80000

10
sys/amd64/linux32/linux32_machdep.c
View File

@ -640,6 +640,16 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
td->td_retval[0] = p2->p_pid;
td->td_retval[1] = 0;
if (args->flags & CLONE_VFORK) {
/* wait for the children to exit, ie. emulate vfork */
PROC_LOCK(p2);
p2->p_flag |= P_PPWAIT;
while (p2->p_flag & P_PPWAIT)
msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
PROC_UNLOCK(p2);
}
return (0);
}

1
sys/i386/linux/linux.h
View File

@ -793,6 +793,7 @@ typedef int l_mqd_t;
#define CLONE_FILES 0x400
#define CLONE_SIGHAND 0x800
#define CLONE_PID 0x1000 /* this flag does not exist in linux anymore */
#define CLONE_VFORK 0x4000
#define CLONE_PARENT 0x00008000
#define CLONE_THREAD 0x10000
#define CLONE_SETTLS 0x80000

10
sys/i386/linux/linux_machdep.c
View File

@ -532,6 +532,16 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
td->td_retval[0] = p2->p_pid;
td->td_retval[1] = 0;
if (args->flags & CLONE_VFORK) {
/* wait for the children to exit, ie. emulate vfork */
PROC_LOCK(p2);
p2->p_flag |= P_PPWAIT;
while (p2->p_flag & P_PPWAIT)
msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
PROC_UNLOCK(p2);
}
return (0);
}