Valgrind：注意到但未处理的 ioctl；是否需要处理以及如何查找？

Question

我有一个大型应用程序，我正在检查内存泄漏。我正在将 valgrind 与 options 一起使用--leak-check=yes --track-origins=yes。警告示例：

==2173== Warning: noted but unhandled ioctl 0xc410 with no size/direction hints.
==2173==    This could cause spurious value errors to appear.
==2173==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==2173== Warning: noted but unhandled ioctl 0xc400 with no size/direction hints.
==2173==    This could cause spurious value errors to appear.
==2173==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==2173== Warning: noted but unhandled ioctl 0xc40d with no size/direction hints.
==2173==    This could cause spurious value errors to appear.
==2173==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==2173== Warning: noted but unhandled ioctl 0xc40c with no size/direction hints.
==2173==    This could cause spurious value errors to appear.
==2173==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==2173== Thread 3 VCHIQ completio:
==2173== Use of uninitialised value of size 4
==2173==    at 0x7E1E04C: completion_thread (in /opt/vc/lib/libvchiq_arm.so)
==2173==  Uninitialised value was created by a stack allocation
==2173==    at 0x7E1DF98: completion_thread (in /opt/vc/lib/libvchiq_arm.so)

我想知道是否需要处理 ioctl 调用。我无法阅读官方文档，但此链接没有奇怪的字符。似乎未处理的 ioctl 指的是可以更改内存的 Linux 系统调用。但似乎我不应该担心这些，因为我可以假设 Linux（尽管我使用的是 Raspberry Pi，如果这很重要）正在正确处理内存。

除非它说我的记忆可能会被移动，然后 valgrind 会失去它的踪迹。如果是这种情况，那么处理它是有意义的。但是如果我需要处理它，那么我怎么知道它指的是哪些函数。显示的消息不涉及任何功能。我可以参考编写包装器函数的文档，但我是否只需要找到我使用某个系统函数的每个实例并编写包装器？

Answer 1

网站的问题应该得到解决。

对没有大小/方向提示的 ioctl 检查也已修改，现在应该噪音较小。