Hi Honza
Thank you for your reply.
Look at this example:
#1 function callMe(){
#2 if(true){
#3 var a = 1;
#4 var b = 2;
#5 }else{
#6 var c = 10;
#7 }
#8 }
#9 callMe();
I want to develop a extension for firebug to add some debugging
functionality that can give the execution trace in order, so the result
will look like this:
#9 -> #1 -> #2 -> #3 -> #4
I looked through the firebug code and the JSD component.
The getLineOffsets() only check if the line is valid for execution.
A way to approach this is to set breakpoints on all lines and keep resuming
the JS. So when the breakpoints are reached, the JSD setbreakpointHook can
tell the frame info. However, it is quite slow and unpractical.
Any thoughts? Thank you!
On Wed, Mar 20, 2013 at 12:44 AM, Jan Honza Odvarko <[email protected]>wrote:
>
> On Mar 19, 7:34 pm, MMTY <[email protected]> wrote:
> > Thank you. Is it possible to get the line execution trace in
> > order?
> What do you mean by order?
>
> > getLineOffsets() is just used to tell whether the line is executed
> > or not.
> Note that it should say whether the line is "executable" (not
> executed)
>
> Honza
>
>
> >
> > Thanks
> >
> > On Fri, Mar 15, 2013 at 8:05 AM, Jan Honza Odvarko <[email protected]
> >wrote:
> >
> >
> >
> >
> >
> >
> >
> > > Firebug is currently using JSD (jsdIDebuggerService) to figure out,
> > > which line
> > > is executable. However, the plan is to switch to JSD2 (work in
> > > progress)
> > >https://wiki.mozilla.org/Debugger
> >
> > > You should also base your extension on JSD2
> >
> > > Look for getLineOffsets(line) and getOffsetLine(offset) in the
> > > Debugger document.
> > > I didn't test it, but I think that if getLineOffset returns null, the
> > > line is not executable.
> >
> > > Honza
> >
> > > On Mar 15, 9:17 am, SK <[email protected]> wrote:
> > > > I want to know how to access JavaScript execution trace at runtime.
> I saw
> > > > Firebug can do something like this:
> >
> > > > [image: enter image description here]
> >
> > > > Refer to the image above, all the line numbers executed are
> highlighted
> > > in
> > > > green. They are achieved at runtime. I guess there must be some way
> to
> > > > access those info from the JavaScript engine used by the browser.
> >
> > > > Say now I want to build a firebug plugin to access those info and
> examine
> > > > all the variables in each executed line at the runtime, how should I
> do?
> >
> > > > Thank you!
> >
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