On Sat, 30 Jun 2001, Stas Bekman wrote:
> modperl_trace_level_set gets called from modperl_cmd.c only if you have
> PerlTrace in httpd.conf. Of course this case ignores the env var, but
> there is no other place in the code that calls this func to check for the
> env setting of MOD_PERL_TRACE.
right, because we have PerlTrace now. not that we can't support
MOD_PERL_TRACE too.
> On the related note the following would be very useful when debugging
> configuration sections and possibly from the code as well, if we provide a
> hook to change the trace level from code as well:
> $s->trace_level('d');
that would be useful. though at runtime with threaded mpm, it is not
threadsafe. but we could make a per-request trace level that overrides
the per-server.
> Now what would be nice to have is to allow the negation of the level, so
> in httpd.conf one can do:
>
> PerlTrace d
> PerlModule CGI
> PerlTrace !d
>
> Here I want to have a 'd' trace only for a section between two PerlTrace
> directives.
'PerlTrace !d' looks like it should remove 'd' tracing. if you only want
'd', then use 'PerlTrace d'
> I think also that this can be improved as well: Currently
>
> PerlTrace d
>
> followed by
>
> PerlTrace g
>
> turns off 'd' and turns on 'g' instead of appending 'g'.
why not just use 'PerlTrace dg' then?
> To summarize I suggest to have:
>
> PerlTrace [!]all | [!]d[!]f[!]g[!]h[!]i[!]m[!]s | off
>
> all turn all on
> off turn all off
> d directive processing
> f filters
> g Perl runtime interaction
> h handlers
> i interpreter pool management
> m memory allocations
> s perl sections
>
> !, before the letter, turns off the setting for this level, so one can
> have:
>
> PerlTrace dh #level = dh
> PerlTrace !dg!h #level = g
i'm not seeing how this is useful, why wouldn't you just say 'PerlTrace g'?
> well if we have !, we can also do: !all (instead of adding 'off' level).
why not just stick with 'off' ?
> (but if we have off would be nice to replace all with on (or alias) but I
> understand that it'll break the convention with normal Perl tracing)
an alias would be fine i guess.
> and of course being able to turn levels on and off via $server.
how about something similar to Perl's $^D?
then you can do:
local $ModPerl::Trace = 1|4; #dg
or
local $ModPerl::Trace &= ~4; #remove 'g'
or
local $ModPerl::Trace |= 4; #append 'g'
there could be constants for the numbers.
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