OpenCoverage

explicit_bzero.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/openssh/src/openbsd-compat/explicit_bzero.c

Source code

Switch to Preprocessed file

Line Source Count

1 /* OPENBSD ORIGINAL: lib/libc/string/explicit_bzero.c */ -

2 /* $OpenBSD: explicit_bzero.c,v 1.1 2014/01/22 21:06:45 tedu Exp $ */ -

3 /* -

4 * Public domain. -

5 * Written by Ted Unangst -

6 */ -

7 -

8 #include "includes.h" -

9 -

10 #include <string.h> -

11 -

12 /* -

13 * explicit_bzero - don't let the compiler optimize away bzero -

14 */ -

15 -

16 #ifndef HAVE_EXPLICIT_BZERO -

17 -

18 #ifdef HAVE_MEMSET_S -

19 -

20 void -

21 explicit_bzero(void *p, size_t n) -

22 { -

23 if (n == 0) -

24 return; -

25 (void)memset_s(p, n, 0, n); -

26 } -

27 -

28 #else /* HAVE_MEMSET_S */ -

29 -

30 /* -

31 * Indirect bzero through a volatile pointer to hopefully avoid -

32 * dead-store optimisation eliminating the call. -

33 */ -

34 static void (* volatile ssh_bzero)(void *, size_t) = bzero; -

35 -

36 void -

37 explicit_bzero(void *p, size_t n) -

38 { -

if (n == 0)

n == 0	Description
TRUE	evaluated 1356 times by 3 tests Evaluated by: ssh-keygen test_kex test_sshkey
FALSE	evaluated 5762854 times by 8 tests Evaluated by: ssh-keygen sshd test_bitmap test_hostkeys test_kex test_sshbuf test_sshkey test_utf8

1356-5762854

return;

executed 1356 times by 3 tests: return;

Executed by:

ssh-keygen
test_kex
test_sshkey

1356

41 /* -

42 * clang -fsanitize=memory needs to intercept memset-like functions -

43 * to correctly detect memory initialisation. Make sure one is called -

44 * directly since our indirection trick above successfully confuses it. -

45 */ -

46 #if defined(__has_feature) -

47 # if __has_feature(memory_sanitizer) -

48 memset(p, 0, n); -

49 # endif -

50 #endif -

51 -

52 ssh_bzero(p, n); -

}

executed 5762854 times by 8 tests: end of block

Executed by:

ssh-keygen
sshd
test_bitmap
test_hostkeys
test_kex
test_sshbuf
test_sshkey
test_utf8

5762854

54 -

55 #endif /* HAVE_MEMSET_S */ -

56 -

57 #endif /* HAVE_EXPLICIT_BZERO */ -

Source code

Switch to Preprocessed file

Generated by Squish Coco 4.2.2