Hi Nicolas,
I'm getting the following error when I attempt to use the addon:
console.error: jit-dev-tools:
Message: TypeError: this.debuggee is undefined
Stack:
JitPanel<.onReady@resource://gre/modules/commonjs/toolkit/loader.js ->
resource://jit-dev-tools/lib/jit-panel.js:75:5
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js ->
resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js ->
resource://gre/modules/commonjs/sdk/event/core.js:89:38
onStateChange@resource://gre/modules/commonjs/toolkit/loader.js ->
resource://gre/modules/commonjs/dev/panel.js:70:3
I get that in both Firefox 38 and Firefox Developer edition on x86_64 Linux.
Thanks
Liam Wilson
On Wednesday, June 10, 2015 at 9:58:26 PM UTC+1, Nicolas B. Pierron wrote:
> Hello everybody,
>
> I am please to do an early announce a new tool named Jit DevTools.
>
> This new tool is an addon which mostly target Jit developers. It uses the
> recently added Debugger.onIonCompilation hook to display the latest MIR [1]
> and LIR graphs within the dev tools.
>
> To use this tool, go to a web page, and open the Jit DevTools panel, then
> wait until a function got compiled.
>
> Once a function is compiled, you can select a compiled script, which will
> display the MIR graph of the compilation. If you need to, you can also have
> a look at the LIR graph. The output is similar to the one rendered with
> iongraph [5].
>
> By selecting any inlined script, the background of the block titles will
> change color, if the block correspond to the inlined instance. This feature
> is quite useful to identify how a function plays in a compiled script.
>
> You might find this tool quite handy to use for the following use cases:
> - Investigating DOM optimization.
> - Investigating jsperf issues.
> - Comparing function implementations, and impacts on the generated code.
>
> This addon works on optimized builds, and even with parallel compilation
> enabled.
>
> You can download [2] this early version from
> http://people.mozilla.org/~npierron/jit-dev-tools/ , or build it your-self
> by using the sources [3] with jpm tool [4].
>
> Have fun, and enjoy.
>
>
> [1] http://people.mozilla.org/~npierron/jit-dev-tools/jit-dev-tools-0.0.1.png
> [2] http://people.mozilla.org/~npierron/jit-dev-tools/jit-dev-tools-0.0.1.xpi
> [3] https://github.com/nbp/jit-dev-tools/
> [4] https://developer.mozilla.org/en-US/Add-ons/SDK/Tools/jpm
> [5]
> https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Hacking_Tips#Using_IonMonkey_spew_%28JS_shell%29
>
> --
> Nicolas B. Pierron
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