mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-04 02:18:37 +00:00
7c542ccd39
seem to be simply duplication of the x86 instruction set tests into the addrcheck and helgrind trees. I'm not sure what this duplication achieves. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3264
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
|
|
Make sure that leak-check's pointer tracing avoids traps
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "memcheck/memcheck.h"
|
|
#include <sys/mman.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
int main()
|
|
{
|
|
const int ptrbits = sizeof(void *) * 8;
|
|
const int stepbits = 14;
|
|
const int stepsize = (1 << stepbits);
|
|
const int nptrs = 1 << (ptrbits - stepbits);
|
|
|
|
char **volatile ptrs;
|
|
int i;
|
|
int fd;
|
|
char *map;
|
|
|
|
ptrs = malloc(nptrs * sizeof(char *));
|
|
for(i = 0; i < nptrs; i++)
|
|
ptrs[i] = (char *)(i << stepbits);
|
|
|
|
/* lay some traps */
|
|
map = mmap(0, stepsize * 2, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
|
|
if (map == (char *)-1)
|
|
perror("trap 1 failed");
|
|
|
|
map = mmap(0, stepsize * 2, PROT_WRITE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
|
|
if (map == (char *)-1)
|
|
perror("trap 2 failed");
|
|
|
|
/* non-zero mmap of a zero-length file -> SIGBUS */
|
|
fd = open("./pointer-trace-test-file", O_RDWR | O_CREAT | O_EXCL, 0600);
|
|
unlink("./pointer-trace-test-file");
|
|
|
|
map = mmap(0, stepsize * 2, PROT_WRITE|PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (map == (char *)-1)
|
|
perror("trap 3 failed");
|
|
//printf("trap 3 = %p-%p\n", map, map+stepsize*2);
|
|
|
|
map = mmap(0, 256*1024, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
|
|
if (map == (char *)-1)
|
|
perror("trap 4 failed");
|
|
else {
|
|
munmap(map, 256*1024);
|
|
VALGRIND_MAKE_READABLE(map, 256*1024); /* great big fat lie */
|
|
}
|
|
|
|
VALGRIND_DO_LEAK_CHECK;
|
|
|
|
ptrs = 0;
|
|
|
|
return 0;
|
|
}
|