c - 我正在尝试释放结构数组但得到 free() : invalid next size (fast): 0x0000000000afa010

Question

struct cacheline
{
    int x[16];
};
struct cacheline *block = malloc(sizeof(struct cacheline) *size); //malloc for array of stucts
    write_start = clock();
    for (k=0;k<=1000;k=k+1){
        for (i=1;i<=size;i=i+1){
            for(j=0;j<16;j=j+1){
                    block[i].x[j] = j+1; ///some operation
            }
        }
    }
write_stop = clock();
Elapsed_write_time = (double)(write_stop - write_start)/1000 * 16;
printf("Elapsed time: %f\n",Elapsed_write_time);
free(block); //free the araray of structs

我正在尝试释放结构数组，但出现以下错误。

Answer 1

您写到了数组末尾。最后一个元素是 block[999] 但您的代码也会写入 block[1000]。