Re: [Valgrind-users] Enabling instrumentation with callgrind_control not working

[Philippe W. <phi...@sk...>]

On Sun, 2015-02-01 at 20:39 +0000, Christian Priebe wrote:

> 
> It unfortunately does not work. I receive the following message:
> 
> "vgdb error: no FIFO found matching pid 5803"
> 
> 
> "5803" is the pid as reported by vgdb -l.

can you do
    vgdb -d -d -d -l
and then
    vgdb -d -d -d --pid=12345 help
(assuming 12345 is the pid of the mysql process).
That should give detailed tracing about which FIFOs are found
and/or tried by both vgdb commands.

Note that you have to run vgdb in a context
which is similar to the context of the process you
are trying to contact.
Typically, TMPDIR and the user launching vgdb must be the same
as TMPDIR value and user of the process you are trying to contact.

Philippe