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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
/* Wanalyzer-out-of-bounds tests for buffer over-reads. */
/* Avoid folding of memcpy. */
typedef void * (*memcpy_t) (void *dst, const void *src, size_t n);
static memcpy_t __attribute__((noinline))
get_memcpy (void)
{
return memcpy;
}
void test1 (void)
{
int id_sequence[3];
memset (id_sequence, 0, 3 * sizeof(int));
printf ("%i", id_sequence[3]); /* { dg-line test1 } */
/* { dg-warning "stack-based buffer over-read" "warning" { target *-*-* } test1 } */
/* { dg-message "read of 4 bytes from after the end of 'id_sequence'" "num bad bytes note" { target *-*-* } test1 } */
/* { dg-message "valid subscripts for 'id_sequence' are '\\\[0\\\]' to '\\\[2\\\]'" "valid subscript note" { target *-*-* } test1 } */
}
void test2 (void)
{
int n = 4;
int arr[n];
memset (arr, 0, n * sizeof (int));
int sum = 0;
for (int i = n - 1; i >= 0; i--)
sum += arr[i];
}
void test3 (void)
{
int n = 4;
int arr[4];
memset (arr, 0, n * sizeof (int));
int sum = 0;
for (int i = n; i > 0; i--)
sum += arr[i]; /* { dg-line test3 } */
/* { dg-warning "stack-based buffer over-read" "warning" { target *-*-* } test3 } */
/* { dg-message "" "note" { target *-*-* } test3 } */
}
void test4 (void)
{
int n = 4;
int *arr = malloc (n * sizeof (int));
if (!arr)
return;
memset (arr, 0, n * sizeof(int));
int sum = 0;
for (int i = n - 1; i >= 0; i--)
sum += *(arr + i);
free (arr);
}
void test5 (void)
{
int n = 4;
int *arr = malloc (n * sizeof (int));
if (!arr)
return;
memset (arr, 0, n * sizeof(int));
int sum = 0;
for (int i = n; i > 0; i--)
sum += *(arr + i); /* { dg-line test5 } */
free (arr);
/* { dg-warning "heap-based buffer over-read" "bounds warning" { target *-*-* } test5 } */
/* { dg-message "read of 4 bytes from after the end of the region" "num bad bytes note" { target *-*-* } test5 } */
}
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