[lldb-dev] [RFC] Simplifying logging code
Colin Riley via lldb-dev
lldb-dev at lists.llvm.org
Wed Aug 12 05:37:53 PDT 2015
From an efficiency perspective, the arguments to Printf will still need
to be evaluated. Some of those arguments touch multiple areas and will
require significant effort to change into a new format, which is
essentially the exact same as we have now.
Was there not a decision to stick with what we have now when this came
up a few weeks ago? Clean and easy to understand over verbose any day of
the week in my view.
On 12/08/2015 11:52, Tamas Berghammer via lldb-dev wrote:
> Hi All,
> At the moment logging in LLDB done in the following way:
> Log* log = GetLogIfAllCategoriesSet(...);
> if (log)
> This approach is clean and easy to understand but have the
> disadvantage of being a bit verbose. What is the general opinion about
> changing it to something like this?
> Logger log = GetLogIfAllCategoriesSet(...);
> The idea would be to return a new type of object from
> GetLogIfAllCategoriesSet with small size (size of a pointer) what will
> check if the log category is enabled. From efficiency perspective this
> change would have no effect and it will simplify the writing of the
> logging statements.
> Implementation details:
> Logger would just contain a pointer to a Log object and forward all
> call to that object if that one isn't null. Additionally it will have
> a method to check for nullness of the underlying log object if we want
> to do some calculation only if the logging is enabled.
> P.S.: Other possible simplification in the logging system would be to
> use LogIfAllCategoriesSet but it require the specification of the log
> channel at each call and have a very minor overhead because of
> checking for the enabled log categories at each call.
> lldb-dev mailing list
> lldb-dev at lists.llvm.org
- Colin Riley
Parallel/Graphics Debugger Systems
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