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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/* Copyright (C) 2005-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
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/>. */
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <tst-stack-align.h>
#include <unistd.h>
static int res, fds[2], result;
static bool test_destructors;
extern void in_dso (int *, bool *, int *);
static void __attribute__ ((constructor)) con (void)
{
res = TEST_STACK_ALIGN () ? -1 : 1;
}
static void __attribute__ ((destructor)) des (void)
{
if (!test_destructors)
return;
char c = TEST_STACK_ALIGN () ? 'B' : 'A';
write (fds[1], &c, 1);
}
static int
do_test (void)
{
if (!res)
{
puts ("binary's constructor has not been run");
result = 1;
}
else if (res != 1)
{
puts ("binary's constructor has been run without sufficient alignment");
result = 1;
}
if (TEST_STACK_ALIGN ())
{
puts ("insufficient stack alignment in do_test");
result = 1;
}
in_dso (&result, &test_destructors, &fds[1]);
if (pipe (fds) < 0)
{
printf ("couldn't create pipe: %m\n");
return 1;
}
pid_t pid = fork ();
if (pid < 0)
{
printf ("fork failed: %m\n");
return 1;
}
if (!pid)
{
close (fds[0]);
test_destructors = true;
exit (0);
}
close (fds[1]);
unsigned char c;
ssize_t len;
int des_seen = 0, dso_des_seen = 0;
while ((len = TEMP_FAILURE_RETRY (read (fds[0], &c, 1))) > 0)
{
switch (c)
{
case 'B':
puts ("insufficient alignment in binary's destructor");
result = 1;
/* FALLTHROUGH */
case 'A':
des_seen++;
break;
case 'D':
puts ("insufficient alignment in DSO destructor");
result = 1;
/* FALLTHROUGH */
case 'C':
dso_des_seen++;
break;
default:
printf ("unexpected character %x read from pipe", c);
result = 1;
break;
}
}
close (fds[0]);
if (des_seen != 1)
{
printf ("binary destructor run %d times instead of once\n", des_seen);
result = 1;
}
if (dso_des_seen != 1)
{
printf ("DSO destructor run %d times instead of once\n", dso_des_seen);
result = 1;
}
int status;
pid_t termpid;
termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
if (termpid == -1)
{
printf ("waitpid failed: %m\n");
result = 1;
}
else if (termpid != pid)
{
printf ("waitpid returned %ld != %ld\n",
(long int) termpid, (long int) pid);
result = 1;
}
else if (!WIFEXITED (status) || WEXITSTATUS (status))
{
puts ("child hasn't exited with exit status 0");
result = 1;
}
return result;
}
#include <support/test-driver.c>
|
