相关疑难解决方法(0)

如果没有跟踪工具,有哪些检测/调试内存泄漏的技术？

在GNU C Library Reference Manual中,有一个示例程序(p.65),但我不知道这三个句子__malloc_hook = old_malloc_hook; old_malloc_hook = __malloc_hook; __malloc_hook = my_malloc_hook; 是什么 意思.特别是第二个,谁能为我解释一下？谢谢.

static void *
my_malloc_hook (size_t size, const void *caller)
{
    void *result;
    /* Restore all old hooks */
    __malloc_hook = old_malloc_hook;
    __free_hook = old_free_hook;
    /* Call recursively */
    result = malloc (size);
    /* Save underlying hooks */
    old_malloc_hook = __malloc_hook;
    old_free_hook = __free_hook;
    /* printf might call malloc, so protect it too. */
    printf ("malloc (%u) returns %p\n", (unsigned int) size, result); …