Re: Determining cancellation points in glibc

[Loic Domaigne <tech at domaigne dot com>]

Hello Carlos,

> On Mon, Nov 24, 2008 at 12:27 PM, Michael Kerrisk
> <mtk.manpages@googlemail.com> wrote:
> > I'd very much like to document which glibc functions are cancellation
> > points (pthread_cancel()).  But, how does one determine this
> > information from the glibc sources?
>
> 1. Find all syscalls.list for your machine.
> 2. Find all syscalls.list for generic.
> 3. Find all assembly implementations of functions for your machine.
> 4. Find all assembly implementations of functions for generic.
>
> If #1 or #2 contains an entry with args that starts with "C" then
> cancellation has been enabled for that function.
>
> If #3 or #4 use sysdep-cancel.h macros then cancellation has been
> enabled for that function.
>
> If #3 or #4 make calls to *_enable_asynccancel and
> *_disable_asynccancel then it is possible that these functions have
> cancellation enabled.
>
> Good luck!

I came to similar conclusions. But what about composite functions like 
printf(), scanf() etc.?

Thanks,
Loïc.