src/test/test-sigbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2014 Lennart Poettering
   4 ***/
   5
   6 #include <sys/mman.h>
   7
   8 #include "fd-util.h"
   9 #include "sigbus.h"
  10 #include "util.h"
  11 #if HAVE_VALGRIND_VALGRIND_H
  12 #include <valgrind/valgrind.h>
  13 #endif
  14
  15 int main(int argc, char *argv[]) {
  16         _cleanup_close_ int fd = -1;
  17         char template[] = "/tmp/sigbus-test-XXXXXX";
  18         void *addr = NULL;
  19         uint8_t *p;
  20
  21 #if HAVE_VALGRIND_VALGRIND_H
  22         if (RUNNING_ON_VALGRIND)
  23                 return EXIT_TEST_SKIP;
  24 #endif
  25
  26 #ifdef __SANITIZE_ADDRESS__
  27         return EXIT_TEST_SKIP;
  28 #endif
  29         sigbus_install();
  30
  31         assert_se(sigbus_pop(&addr) == 0);
  32
  33         assert_se((fd = mkostemp(template, O_RDWR|O_CREAT|O_EXCL)) >= 0);
  34         assert_se(unlink(template) >= 0);
  35         assert_se(posix_fallocate(fd, 0, page_size() * 8) >= 0);
  36
  37         p = mmap(NULL, page_size() * 16, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  38         assert_se(p != MAP_FAILED);
  39
  40         assert_se(sigbus_pop(&addr) == 0);
  41
  42         p[0] = 0xFF;
  43         assert_se(sigbus_pop(&addr) == 0);
  44
  45         p[page_size()] = 0xFF;
  46         assert_se(sigbus_pop(&addr) == 0);
  47
  48         p[page_size()*8] = 0xFF;
  49         p[page_size()*8+1] = 0xFF;
  50         p[page_size()*10] = 0xFF;
  51         assert_se(sigbus_pop(&addr) > 0);
  52         assert_se(addr == p + page_size() * 8);
  53         assert_se(sigbus_pop(&addr) > 0);
  54         assert_se(addr == p + page_size() * 10);
  55         assert_se(sigbus_pop(&addr) == 0);
  56
  57         sigbus_reset();
  58 }