免费（）不释放内存？ [英] free() not deallocating memory?

问题描述

free(str);
printf("%d\n", str->listeners);

对printf的调用成功（如做其他任何调用STR的成员）。这怎么可能？

The call to printf succeeds (as do any other calls to str's members). How is this possible?

推荐答案

您只差（联合国）幸运。这code表现出不确定的行为 - 任何事情都有可能发生，包括寻找像内存中不释放

You're just (un)lucky. That code exhibits undefined behavior - anything can happen, including looking like the memory wasn't freed.

存储器的是的释放，但在积极地清除它是没有意义的，因此它的原始内容很可能仍然存在。但是你不能依靠这一点。

The memory is freed, but there is no point in actively clearing it, so its original content is likely to still be there. But you can't rely on that.

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