1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <fcntl.h>
4 #include <sys/mman.h>
5 #include <unistd.h>
6
7 #if HAVE_VALGRIND_VALGRIND_H
8 # include <valgrind/valgrind.h>
9 #endif
10
11 #include "fd-util.h"
12 #include "fs-util.h"
13 #include "memory-util.h"
14 #include "sigbus.h"
15 #include "tests.h"
16
main(int argc,char * argv[])17 int main(int argc, char *argv[]) {
18 _cleanup_close_ int fd = -1;
19 char template[] = "/tmp/sigbus-test-XXXXXX";
20 void *addr = NULL;
21 uint8_t *p;
22
23 test_setup_logging(LOG_INFO);
24
25 #if HAS_FEATURE_ADDRESS_SANITIZER
26 return log_tests_skipped("address-sanitizer is enabled");
27 #endif
28 #if HAVE_VALGRIND_VALGRIND_H
29 if (RUNNING_ON_VALGRIND)
30 return log_tests_skipped("This test cannot run on valgrind");
31 #endif
32
33 sigbus_install();
34
35 assert_se(sigbus_pop(&addr) == 0);
36
37 assert_se((fd = mkostemp(template, O_RDWR|O_CREAT|O_EXCL)) >= 0);
38 assert_se(unlink(template) >= 0);
39 assert_se(posix_fallocate_loop(fd, 0, page_size() * 8) >= 0);
40
41 p = mmap(NULL, page_size() * 16, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
42 assert_se(p != MAP_FAILED);
43
44 assert_se(sigbus_pop(&addr) == 0);
45
46 p[0] = 0xFF;
47 assert_se(sigbus_pop(&addr) == 0);
48
49 p[page_size()] = 0xFF;
50 assert_se(sigbus_pop(&addr) == 0);
51
52 p[page_size()*8] = 0xFF;
53 p[page_size()*8+1] = 0xFF;
54 p[page_size()*10] = 0xFF;
55 assert_se(sigbus_pop(&addr) > 0);
56 assert_se(addr == p + page_size() * 8);
57 assert_se(sigbus_pop(&addr) > 0);
58 assert_se(addr == p + page_size() * 10);
59 assert_se(sigbus_pop(&addr) == 0);
60
61 sigbus_reset();
62 }
63