1*49cdfc7eSAndroid Build Coastguard Worker // SPDX-License-Identifier: GPL-2.0-only
2*49cdfc7eSAndroid Build Coastguard Worker /*
3*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
4*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2012 Wanlong Gao <[email protected]>
5*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2012 Cyril Hrubis <[email protected]>
6*49cdfc7eSAndroid Build Coastguard Worker */
7*49cdfc7eSAndroid Build Coastguard Worker
8*49cdfc7eSAndroid Build Coastguard Worker /*\
9*49cdfc7eSAndroid Build Coastguard Worker * [Description]
10*49cdfc7eSAndroid Build Coastguard Worker *
11*49cdfc7eSAndroid Build Coastguard Worker * Call clone() with CLONE_VFORK flag set. verify that
12*49cdfc7eSAndroid Build Coastguard Worker * execution of parent is suspended until child finishes
13*49cdfc7eSAndroid Build Coastguard Worker */
14*49cdfc7eSAndroid Build Coastguard Worker
15*49cdfc7eSAndroid Build Coastguard Worker #define _GNU_SOURCE
16*49cdfc7eSAndroid Build Coastguard Worker
17*49cdfc7eSAndroid Build Coastguard Worker #include <stdlib.h>
18*49cdfc7eSAndroid Build Coastguard Worker #include <sched.h>
19*49cdfc7eSAndroid Build Coastguard Worker #include "tst_test.h"
20*49cdfc7eSAndroid Build Coastguard Worker #include "clone_platform.h"
21*49cdfc7eSAndroid Build Coastguard Worker
22*49cdfc7eSAndroid Build Coastguard Worker static volatile int child_exited;
23*49cdfc7eSAndroid Build Coastguard Worker static void *child_stack;
24*49cdfc7eSAndroid Build Coastguard Worker
child_fn(void * unused LTP_ATTRIBUTE_UNUSED)25*49cdfc7eSAndroid Build Coastguard Worker static int child_fn(void *unused LTP_ATTRIBUTE_UNUSED)
26*49cdfc7eSAndroid Build Coastguard Worker {
27*49cdfc7eSAndroid Build Coastguard Worker int i;
28*49cdfc7eSAndroid Build Coastguard Worker
29*49cdfc7eSAndroid Build Coastguard Worker for (i = 0; i < 100; i++) {
30*49cdfc7eSAndroid Build Coastguard Worker sched_yield();
31*49cdfc7eSAndroid Build Coastguard Worker usleep(1000);
32*49cdfc7eSAndroid Build Coastguard Worker }
33*49cdfc7eSAndroid Build Coastguard Worker
34*49cdfc7eSAndroid Build Coastguard Worker child_exited = 1;
35*49cdfc7eSAndroid Build Coastguard Worker _exit(0);
36*49cdfc7eSAndroid Build Coastguard Worker }
37*49cdfc7eSAndroid Build Coastguard Worker
verify_clone(void)38*49cdfc7eSAndroid Build Coastguard Worker static void verify_clone(void)
39*49cdfc7eSAndroid Build Coastguard Worker {
40*49cdfc7eSAndroid Build Coastguard Worker child_exited = 0;
41*49cdfc7eSAndroid Build Coastguard Worker
42*49cdfc7eSAndroid Build Coastguard Worker TST_EXP_PID_SILENT(ltp_clone(CLONE_VM | CLONE_VFORK | SIGCHLD, child_fn, NULL,
43*49cdfc7eSAndroid Build Coastguard Worker CHILD_STACK_SIZE, child_stack), "clone with vfork");
44*49cdfc7eSAndroid Build Coastguard Worker
45*49cdfc7eSAndroid Build Coastguard Worker if (!TST_PASS)
46*49cdfc7eSAndroid Build Coastguard Worker return;
47*49cdfc7eSAndroid Build Coastguard Worker
48*49cdfc7eSAndroid Build Coastguard Worker TST_EXP_VAL(child_exited, 1);
49*49cdfc7eSAndroid Build Coastguard Worker }
50*49cdfc7eSAndroid Build Coastguard Worker
51*49cdfc7eSAndroid Build Coastguard Worker static struct tst_test test = {
52*49cdfc7eSAndroid Build Coastguard Worker .test_all = verify_clone,
53*49cdfc7eSAndroid Build Coastguard Worker .bufs = (struct tst_buffers []) {
54*49cdfc7eSAndroid Build Coastguard Worker {&child_stack, .size = CHILD_STACK_SIZE},
55*49cdfc7eSAndroid Build Coastguard Worker {},
56*49cdfc7eSAndroid Build Coastguard Worker },
57*49cdfc7eSAndroid Build Coastguard Worker };
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