Bug 40336 - Web Inspector: add programmatic API for setting breakpoints
Summary: Web Inspector: add programmatic API for setting breakpoints
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Web Inspector (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Nobody
Keywords: InRadar
Depends on:
Reported: 2010-06-08 14:45 PDT by Jesse Hallett
Modified: 2016-12-13 15:37 PST (History)
4 users (show)

See Also:


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Description Jesse Hallett 2010-06-08 14:45:39 PDT
From time a bug comes up that I can only reproduce in a production environment.  This leads to debugging code that is minified and that I cannot change.  In situations like this it would be really helpful to be able to programmatically set breakpoints.  For example setting a property on a function from the console to cause execution to pause when that function starts running would be great:

    > filter._onPreProcess.debug = true;

It would also be handy to be able to set the value of that property to a predicate function so that execution would only pause if the predicate returned `true`:

    > filter._onPreProcess.debug = function(/* gets arguments sent to _onPreProcess() */) { return !!arguments[1].match(/foo/); };

There are also cases where I can modify where I believe it would be useful to have other breakpoint API options.  When debugging Ruby code with the Ruby debugger I can place a call to a function called `debugger()` in my code to cause execution to pause on that line.  It would be nice to have a similar option in Webkit.
Comment 1 Jesse Hallett 2010-06-08 15:00:37 PDT
I found out that you can use the `debugger;` statement for that latter case.
Comment 2 Brian Burg 2014-11-28 19:52:50 PST
This seems like a good candidate for the console command line. Firefox's GCLI (https://github.com/mozilla/gcli/) seems to have a similar interface.

There are significant challenges to making this visible to user scripts, so I think we should focus on something only made available through the inspector console.
Comment 3 Radar WebKit Bug Importer 2014-11-28 19:53:03 PST