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问题描述

可能重复:

  

我听说的glibc的malloc()不是线程安全的,因为一个进程调用malloc的几个线程()同时会导致不确定的行为。我的问题是,如果一个线程调用free()的将另一个线程调用malloc(),这会导致不确定的行为呢?

I heard that glibc malloc() was not thread safe, since several threads of a process calling malloc() simultaneously will lead to undefined behaviour. And my question is if a thread calls free() will another thread is calling malloc(), will this lead to undefined behaviour as well?

推荐答案

如果您-pthreads链接,malloc()函数将线程glibc中。

If you link with -pthreads, malloc() will be threadsafe in glibc.

如果没有这些,链接器不会在一个线程的malloc,这将导致不确定的行为联系起来。

Without that, the linker doesn't link in a threadsafe malloc, which will lead to undefined behavior.

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07-30 15:12