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daemon: debug segv correct use of dereferencing NULL.

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This commit is contained in:
Richard W.M. Jones
2012-01-09 16:55:49 +00:00
parent e0c3093795
commit 01e717b3c1
1 changed files with 7 additions and 1 deletions
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8
daemon/debug.c
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@@ -198,7 +198,13 @@ debug_fds (const char *subcmd, int argc, char *const *const argv)
static char *
debug_segv (const char *subcmd, int argc, char *const *const argv)
{
*(int*)0 = 0;
/* http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html
* "Dereferencing a NULL Pointer: contrary to popular belief,
* dereferencing a null pointer in C is undefined. It is not defined
* to trap [...]"
*/
volatile int *ptr = NULL;
*ptr = 1;
return NULL;
}