1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/* Test for proper error/errno handling in clone.
Copyright (C) 2006-2024 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
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* BZ #2386, BZ #31402 */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>
#include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
#include <support/check.h>
volatile unsigned v = 0xdeadbeef;
int child_fn(void *arg)
{
puts ("FAIL: in child_fn(); should not be here");
exit(1);
}
static int
__attribute__((noinline))
do_clone (int (*fn)(void *), void *stack)
{
int result;
unsigned int a = v;
unsigned int b = v;
unsigned int c = v;
unsigned int d = v;
unsigned int e = v;
unsigned int f = v;
unsigned int g = v;
unsigned int h = v;
unsigned int i = v;
unsigned int j = v;
unsigned int k = v;
unsigned int l = v;
unsigned int m = v;
unsigned int n = v;
unsigned int o = v;
result = clone (fn, stack, 0, NULL);
/* Check that clone does not clobber call-saved registers. */
TEST_VERIFY (a == v && b == v && c == v && d == v && e == v && f == v
&& g == v && h == v && i == v && j == v && k == v && l == v
&& m == v && n == v && o == v);
return result;
}
static void
__attribute__((noinline))
do_test_single (int (*fn)(void *), void *stack)
{
printf ("%s (fn=%p, stack=%p)\n", __FUNCTION__, fn, stack);
errno = 0;
int result = do_clone (fn, stack);
TEST_COMPARE (errno, EINVAL);
TEST_COMPARE (result, -1);
}
static int
do_test (void)
{
char st[128 * 1024] __attribute__ ((aligned));
void *stack = NULL;
#if _STACK_GROWS_DOWN
stack = st + sizeof (st);
#elif _STACK_GROWS_UP
stack = st;
#else
# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
#endif
do_test_single (child_fn, NULL);
do_test_single (NULL, stack);
do_test_single (NULL, NULL);
return 0;
}
#include <support/test-driver.c>
|
