[LTP] [PATCH] syscalls/kcmp03: work around bug in C library

[Steve Muckle]

On 09/06/2017 03:09 AM, Cyril Hrubis wrote:
> Hi!
>> Some versions of glibc and bionic report the same PID for parent
>> and child when clone() is called with CLONE_VM but not
>> CLONE_THREAD.
> 
> Is that the result of the infamous pid caching?

In bionic yes, I can't say for sure in glibc but I'd assume so. I
haven't tested a glibc version that had pid caching removed.

> Can we fix that by using the raw getpid() syscall in the test
> library? If so I guess that using raw syscall in the test library may
> be a safer bet.
Probably. I'll try it.

thanks,
Steve