Line data    Source code

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