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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* Copyright © 2015 Raspberry Pi Foundation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The copyright holders make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "utils.h"
#if FENCE_MALLOC_ACTIVE && defined (HAVE_SIGACTION)
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
pixman_bool_t verbose;
static void
segv_handler (int sig, siginfo_t *si, void *unused)
{
_exit (EXIT_SUCCESS);
}
static void
die (const char *msg, int err)
{
if (err)
perror (msg);
else
fprintf (stderr, "%s\n", msg);
abort ();
}
static void
prinfo (const char *fmt, ...)
{
va_list ap;
if (!verbose)
return;
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
}
static void
do_expect_signal (void (*fn)(void *), void *data)
{
struct sigaction sa;
sa.sa_flags = SA_SIGINFO;
sigemptyset (&sa.sa_mask);
sa.sa_sigaction = segv_handler;
if (sigaction (SIGSEGV, &sa, NULL) == -1)
die ("sigaction failed", errno);
if (sigaction (SIGBUS, &sa, NULL) == -1)
die ("sigaction failed", errno);
(*fn)(data);
_exit (EXIT_FAILURE);
}
/* Check that calling fn(data) causes a segmentation fault.
*
* You cannot portably return from a SIGSEGV handler in any way,
* so we fork, and do the test in the child process. Child's
* exit status will reflect the result. Its SEGV handler causes it
* to exit with success, and return failure otherwise.
*/
static pixman_bool_t
expect_signal (void (*fn)(void *), void *data)
{
pid_t pid, wp;
int status;
pid = fork ();
if (pid == -1)
die ("fork failed", errno);
if (pid == 0)
do_expect_signal (fn, data); /* never returns */
wp = waitpid (pid, &status, 0);
if (wp != pid)
die ("waitpid did not work", wp == -1 ? errno : 0);
if (WIFEXITED (status) && WEXITSTATUS (status) == EXIT_SUCCESS)
return TRUE;
return FALSE;
}
static void
read_u8 (void *data)
{
volatile uint8_t *p = data;
*p;
}
static pixman_bool_t
test_read_fault (uint8_t *p, int offset)
{
prinfo ("*(uint8_t *)(%p + %d)", p, offset);
if (expect_signal (read_u8, p + offset))
{
prinfo ("\tsignal OK\n");
return TRUE;
}
prinfo ("\tFAILED\n");
return FALSE;
}
static void
test_read_ok (uint8_t *p, int offset)
{
prinfo ("*(uint8_t *)(%p + %d)", p, offset);
/* If fails, SEGV. */
read_u8 (p + offset);
prinfo ("\tOK\n");
}
static pixman_bool_t
test_read_faults (pixman_image_t *image)
{
pixman_bool_t ok = TRUE;
pixman_format_code_t format = pixman_image_get_format (image);
int width = pixman_image_get_width (image);
int height = pixman_image_get_height (image);
int stride = pixman_image_get_stride (image);
uint8_t *p = (void *)pixman_image_get_data (image);
int row_bytes = width * PIXMAN_FORMAT_BPP (format) / 8;
prinfo ("%s %dx%d, row %d B, stride %d B:\n",
format_name (format), width, height, row_bytes, stride);
assert (height > 3);
test_read_ok (p, 0);
test_read_ok (p, row_bytes - 1);
test_read_ok (p, stride);
test_read_ok (p, stride + row_bytes - 1);
test_read_ok (p, 2 * stride);
test_read_ok (p, 2 * stride + row_bytes - 1);
test_read_ok (p, 3 * stride);
test_read_ok (p, (height - 1) * stride + row_bytes - 1);
ok &= test_read_fault (p, -1);
ok &= test_read_fault (p, row_bytes);
ok &= test_read_fault (p, stride - 1);
ok &= test_read_fault (p, stride + row_bytes);
ok &= test_read_fault (p, 2 * stride - 1);
ok &= test_read_fault (p, 2 * stride + row_bytes);
ok &= test_read_fault (p, 3 * stride - 1);
ok &= test_read_fault (p, height * stride);
return ok;
}
static pixman_bool_t
test_image_faults (pixman_format_code_t format, int min_width, int height)
{
pixman_bool_t ok;
pixman_image_t *image;
image = fence_image_create_bits (format, min_width, height, TRUE);
ok = test_read_faults (image);
pixman_image_unref (image);
return ok;
}
int
main (int argc, char **argv)
{
pixman_bool_t ok = TRUE;
if (getenv ("VERBOSE") != NULL)
verbose = TRUE;
ok &= test_image_faults (PIXMAN_a8r8g8b8, 7, 5);
ok &= test_image_faults (PIXMAN_r8g8b8, 7, 5);
ok &= test_image_faults (PIXMAN_r5g6b5, 7, 5);
ok &= test_image_faults (PIXMAN_a8, 7, 5);
ok &= test_image_faults (PIXMAN_a4, 7, 5);
ok &= test_image_faults (PIXMAN_a1, 7, 5);
if (ok)
return EXIT_SUCCESS;
return EXIT_FAILURE;
}
#else /* FENCE_MALLOC_ACTIVE */
int
main (int argc, char **argv)
{
/* Automake return code for test SKIP. */
return 77;
}
#endif /* FENCE_MALLOC_ACTIVE */
|
