Hi.
I'm getting an invalid read of size 8 warning with the code (check.c)
below.Everything seems to be fine, and the warning about reading beyond the
allocated source pointer comes only when I'm copying the source to a particular
index of the destination.
My environment:- MacOSX Darwin 10.8.0 Darwin Kernel Version 10.8.0-
valgrind-3.7.0- gcc version: i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple
Inc. build 5666) (dot 3)
Any clues on why this could happen?
Thanks.- tan
check.c-------------------------------------------------------------------#include
<stdio.h>#include <stdlib.h>#include <pthread.h>#include <assert.h>#include
<time.h>#include <unistd.h>#include <string.h>
#define NUM_E 3
typedef struct mvk_lruc_kv { long l1; long l2; char
c[129];} mvk_lruc_kv_t;
int main(void) { mvk_lruc_kv_t *p1 = malloc(NUM_E *
sizeof(mvk_lruc_kv_t)); mvk_lruc_kv_t *p2 = malloc(30 *
sizeof(mvk_lruc_kv_t));
printf("sizeof(mvk_lruc_kv_t)=%ld, %p, %p, %p, %p\n",
sizeof(mvk_lruc_kv_t), p2, p2+1, p2+2, p1);
memset(p1, 0, sizeof(mvk_lruc_kv_t));
int i = 0; for(i=0; i<(30-NUM_E); i++) {
printf("at index %d\n", i); memcpy(p2+i, p1,
NUM_E*sizeof(mvk_lruc_kv_t)); printf("end at index %d\n", i);
}
return i;}
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