Function realloc

db/memdebug.c:461–507

}

void *realloc(void *ptr, size_t size) {
    struct call *c;
    struct memblock *b;
    struct thread_info *ti;
    size_t was_size = 0;

    /* record new place we allocated from */
    ti = get_thread_info();

    init();
    if (in_init)
        return dl_realloc(ptr, size);


    /* this part is identical to free */
    LOCK(&lk) {
        if (ptr != NULL) {
            /* get back to memblock */
            b = (struct memblock *) ((intptr_t) ptr - offsetof(struct memblock, mem));
            c = b->place_allocated;
            c->total_allocated -= b->blocksize;
            listc_rfl(&c->blocks, b);
            listc_rfl(&blocks, b);
            listc_rfl(&b->ti->blocks, b);
            was_size = b->blocksize;
        }
        else
            b = NULL;

        /* do the real realloc (include the memblock portion). done under
           lock to prevent funny math */
        b = dl_realloc(b, offsetof(struct memblock, mem) + size);

        /* readjust block size */
        b->blocksize = size;

        c = get_call();
        b->place_allocated = c;
        c->total_allocated += size;
        b->ti = ti;
        listc_abl(&c->blocks, b);
        listc_abl(&blocks, b);
        listc_abl(&ti->blocks, b);
    } UNLOCK(&lk);

    return b->mem;
}

char *strdup(const char *s) {
    int sz;