mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 01:33:36 +08:00
4e6d234712
This fixes an off-by-one argc interpretation error (argv[0] is included in the count) in stdlib/tst-qsort2.c causing a segfault if the program is called with one command-line argument only (argv[2] is NULL in that case).
90 lines
1.6 KiB
C
90 lines
1.6 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
char *array;
|
|
char *array_end;
|
|
size_t member_size;
|
|
|
|
int
|
|
compare (const void *a1, const void *b1)
|
|
{
|
|
const char *a = a1;
|
|
const char *b = b1;
|
|
|
|
if (! (array <= a && a < array_end
|
|
&& array <= b && b < array_end))
|
|
{
|
|
puts ("compare arguments not inside of the array");
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
int ret = b[0] - a[0];
|
|
if (ret)
|
|
return ret;
|
|
if (member_size > 1)
|
|
return b[1] - a[1];
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
test (size_t nmemb, size_t size)
|
|
{
|
|
array = malloc (nmemb * size);
|
|
if (array == NULL)
|
|
{
|
|
printf ("%zd x %zd: no memory", nmemb, size);
|
|
return 1;
|
|
}
|
|
|
|
array_end = array + nmemb * size;
|
|
member_size = size;
|
|
|
|
char *p;
|
|
size_t i;
|
|
size_t bias = random ();
|
|
for (i = 0, p = array; i < nmemb; i++, p += size)
|
|
{
|
|
p[0] = (char) (i + bias);
|
|
if (size > 1)
|
|
p[1] = (char) ((i + bias) >> 8);
|
|
}
|
|
|
|
qsort (array, nmemb, size, compare);
|
|
|
|
for (i = 0, p = array; i < nmemb - 1; i++, p += size)
|
|
{
|
|
if (p[0] < p[size]
|
|
|| (size > 1 && p[0] == p[size] && p[1] < p[size + 1]))
|
|
{
|
|
printf ("%zd x %zd: failure at offset %zd\n", nmemb,
|
|
size, i);
|
|
free (array);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
free (array);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
int ret = 0;
|
|
if (argc >= 3)
|
|
ret |= test (atoi (argv[1]), atoi (argv[2]));
|
|
else
|
|
{
|
|
ret |= test (10000, 1);
|
|
ret |= test (200000, 2);
|
|
ret |= test (2000000, 3);
|
|
ret |= test (2132310, 4);
|
|
ret |= test (1202730, 7);
|
|
ret |= test (1184710, 8);
|
|
ret |= test (272710, 12);
|
|
ret |= test (14170, 32);
|
|
ret |= test (4170, 320);
|
|
}
|
|
|
|
return ret;
|
|
}
|