Re: [Valgrind-users] Valgrind hangs when generating supression for Qt5 menus

[Paul F. <pa...@fr...>]

On 14 Jul 2017, at 21:10, Nathan Bahr wrote:

> Hi,
> 
> I made a simple Qt5 application with a single menu item and valgrind is configured to print suppression code.
> 
> If I open and close a menu, valgrind holds onto the QMenu object and prompts to print supression code. This causes the whole setup to hang where I cannot interact with the application or command line interface. I can force-quit the application, which exits out of the command line. The application does not hang if gen-suppressions=no. 
> 
> Is there any way to set valgrind to automatically generate suppression code instead of prompting? Or to make it from the following trace?

Hi

You can use the option

    --gen-suppressions=no|yes|all    print suppressions for errors? [no]

This will generate a suppression block after the usual stacktrace, something like this:

{
   <insert_a_suppression_name_here>
   Memcheck:Leak
   match-leak-kinds: reachable
   fun:malloc
   fun:main
}

If you do reuse the generated suppressions then you will need to generate some sort of unique name.

A+
Paul