Nice idea although unfortunately incomplete. On Windows this has no
effect at all. We cannot use it for common users. When you set the
pref, it logs only to the debug output that can be captured only with
visual studio or similar software being attached. Not something to ask
for a common user.
We also need to figure out how to start writing to a file w/o a
restart. I believe a harder part of this effort...
-hb-
On 1/9/2016 2:32, Eric Rahm wrote:
Hi Folks-
With bug 1233881 <https://bugzilla.mozilla.org/show_bug.cgi?id=1233881> we
landed the ability turn on logging via prefs.
Lets say you have a log module "Foo", if you add a "logging.Foo" pref and
set it to "Debug" you will now see all output from the Foo log module that
is of Debug and higher importance.
Why is this so cool? Well now you don't need to restart your browser to
enable logging [1]. You also don't have to set env vars to enable logging
[2].
There is one caveat: if you don't use LazyLogModule and friends, you don't
get dynamic logging. So go update your loggers!
-e
[1] Okay, this only kind of works right now. You'll still need to set
NSPR_LOG_MODULES="anything_you_want" to see output. Bug 1174972
<https://bugzilla.mozilla.org/show_bug.cgi?id=1174972> will fix this.
[2] If you care about messages during startup you will still need to set
the NSPR_LOG_MODULES env var. Unfortunately it takes time to load the pref
system, and then more time to load your profile.
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