File: blockfault.c

package info (click to toggle)
valgrind 1%3A3.6.0~svn11254%2Bnmu1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 36,460 kB
  • ctags: 39,734
  • sloc: ansic: 339,440; sh: 15,713; xml: 15,183; cpp: 6,982; asm: 6,630; perl: 5,105; makefile: 3,576; exp: 678; haskell: 250
file content (33 lines) | stat: -rw-r--r-- 676 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "tests/sys_mman.h"

static void handler(int sig, siginfo_t *info, void *v)
{
	printf("info: sig=%d code=%d addr=%p\n",
	       info->si_signo, info->si_code, info->si_addr);
	exit(0);
}

/* Blocking a fault, ie SIGSEGV, won't work, and is the same as having
   the default handler */
int main()
{
	int* unmapped_page = get_unmapped_page();
	struct sigaction sa;
	sigset_t mask;

	sa.sa_sigaction = handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_SIGINFO;
	
	sigaction(SIGSEGV, &sa, NULL);

	sigfillset(&mask);
	sigprocmask(SIG_BLOCK, &mask, NULL);

	*(volatile int *)unmapped_page = 213;

	return 0;
}