示例#1
0
文件: ptr_valid.c 项目: mvanga/worlds
bool ptr_valid_string(const char *p)
{
	bool ret;
	struct ptr_valid_batch batch;
	if (!ptr_valid_batch_start(&batch))
		return false;
	ret = ptr_valid_batch_string(&batch, p);
	ptr_valid_batch_end(&batch);
	return ret;
}
示例#2
0
文件: ptr_valid.c 项目: mvanga/worlds
bool ptr_valid(const void *p, size_t alignment, size_t size, bool write)
{
	bool ret;
	struct ptr_valid_batch batch;
	if (!ptr_valid_batch_start(&batch))
		return false;
	ret = ptr_valid_batch(&batch, p, alignment, size, write);
	ptr_valid_batch_end(&batch);
	return ret;
}
示例#3
0
void *autodata_make_table(const void *example, const char *name, size_t *nump)
{
    const char *start, *end, *tag;
    struct ptr_valid_batch batch;
    const void *const magic = (void *)AUTODATA_MAGIC;
    void **table = NULL;
    char first_magic;

    if (!ptr_valid_batch_start(&batch))
        return NULL;

    /* Get range to search. */
    for (start = (char *)((intptr_t)example & ~(getpagesize() - 1));
            ptr_valid_batch(&batch, start-getpagesize(), 1, sizeof(void *),
                            false);
            start -= getpagesize());

    for (end = (char *)((intptr_t)example & ~(getpagesize() - 1));
            ptr_valid_batch(&batch, end, 1, sizeof(void *), false);
            end += getpagesize());

    *nump = 0;
    first_magic = *(char *)&magic;
    for (tag = memchr(start, first_magic, end - start);
            tag;
            tag = memchr(tag+1, first_magic, end - (tag + 1))) {
        void *adata[4];

        /* We can read 4 void *'s here? */
        if (tag + sizeof(adata) > end)
            continue;

        memcpy(adata, tag, sizeof(adata));

        /* False match? */
        if (adata[0] != (void *)AUTODATA_MAGIC || adata[1] != tag)
            continue;

        /* OK, check name. */
        if (!ptr_valid_batch_string(&batch, adata[3])
                || strcmp(name, adata[3]) != 0)
            continue;

        if (!ptr_valid_batch_read(&batch, (char *)adata[2]))
            continue;

        table = realloc(table, sizeof(void *) * (*nump + 1));
        if (!table)
            break;
        table[*nump] = adata[2];
        (*nump)++;
    }
    ptr_valid_batch_end(&batch);
    return table;
}