[libvirt] PATCH: Always log source location if available.

[Daniel Veillard]

On Wed, May 27, 2009 at 01:15:40PM +0100, Daniel P. Berrange wrote:
> 
> Currently, even though all the logging functions get given the source
> function and line number, it is just discarded unless priority == DEBUG.
> 
> As an example, run virsh with logging enabled, and a bogus URI
> 
> LIBVIRT_DEBUG=1 LIBVIRT_LOG_OUTPUTS=1:stderr virsh -c foo://bar
> 13:12:06.252: debug : do_open:993 : trying driver 4 (remote) ...
> 13:12:06.252: debug : do_open:999 : driver 4 remote returned DECLINED
> 13:12:06.252: error : could not connect to foo://bar
> 13:12:06.252: debug : virUnrefConnect:232 : unref connection 0x99617b0 1
> 13:12:06.252: debug : virReleaseConnect:191 : release connection 0x99617b0
> 
> 
> 
> Notice how it doesn't tell the user where the log message with 'error'
> priority came from. The same happens for info & warn levels.
> 
> With the following patch applied, we always report function if it was
> passed into virLogMessage()
> 
> 13:15:00.456: debug : do_open:993 : trying driver 4 (remote) ...
> 13:15:00.456: debug : do_open:999 : driver 4 remote returned DECLINED
> 13:15:00.456: error : virLibConnError:390 : could not connect to foo://bar
> 13:15:00.456: debug : virUnrefConnect:232 : unref connection 0x8dd87b0 1
> 13:15:00.456: debug : virReleaseConnect:191 : release connection 0x8dd87b0
> 
> 
> So, we now see that the error came from virLibConnError at line 390

  Okay, fine, it's just that this is more debugging informations than
anything else, which is why I though it was fine to limit this to debug
sessions. ACK,

Daniel

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