小编Nvi*_*kly的帖子

我一直在争论一个似乎是realloc与valgrind不能很好合作的奇怪案例.似乎我要么分配太多,要么使用realloc不正确.我认真对待valgrind错误,这样的错误让我深感担忧.

最小的工作示例:

#include <stdlib.h>

typedef struct test {
    size_t n;
    size_t r;
    int **ptrs;
} test;

test *new_test() {
    test *t = malloc(sizeof(test));
    t->n = 0; //number of elements
    t->r = 1; //reserve
    t->ptrs = calloc(t->r, sizeof(*(t->ptrs))); //calloc inits so we don't have to
    return t;
}

void push_back_test(test *t, int *ptr) {
    if (t->n == t->r) {
        t->r <<= 1;
        int **temp_ptr = realloc(t->ptrs, sizeof(t->ptrs) * t->r);
        if (temp_ptr) {
            t->ptrs = temp_ptr;
        } else …