src/test/test-sigbus.c

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