running instrumented code using PhantomJS

[msridhar]

I'm trying to run the annex test under PhantomJS. If we could get this working, we could do things like run web tests in a regression suite or automate generation of certain types of traces. The first issue I ran into is that the current PhantomJS websocket support doesn't seem to be up to snuff. So, I hacked up a quick change to keep the trace in memory during record; see the in-memory-trace branch:

https://github.com/SRA-SiliconValley/jalangi/tree/in-memory-trace

I still get some errors on this branch when loading in PhantomJS, though. Steps to reproduce:

• Install PhantomJS: see http://phantomjs.org/download.html
• Save the following PhantomJS script into file load.js:

var page = require('webpage').create(),
    system = require('system'),
    address;

if (system.args.length === 1) {
    console.log('Usage: loadspeed.js <some URL>');
    phantom.exit();
}

address = system.args[1];
page.onConsoleMessage = function (msg) {
    console.log('Got message ' + msg);
};
page.open(address, function (status) {
    console.log("loaded");
    page.evaluate(function () {
         console.log("hello");
         console.log(J$.trace_output);
      });
});

• Check out the in-memory-trace jalangi branch. In analysis.js, line 119, set IN_MEMORY_BROWSER_LOG to inBrowser.
• Start the local web server (python scripts/jalangi.py server), and instrument annex as shown in README.md. No need to start the websocket server, though.
• Run the following command (assumes phantomjs is in your path):

phantomjs load.js http://127.0.0.1:8000/tests/tizen/annex/index_jalangi_.html

When I run, I get the following output:

TypeError: 'undefined' is not an object (evaluating 'screen.orientation.indexOf')

  http://127.0.0.1:8000/tests/tizen/annex/index_jalangi_.html:24
Got message TypeError: Attempting to change writable attribute of unconfigurable property.
Got message TypeError: Attempting to change writable attribute of unconfigurable property.
    at printableValue (http://127.0.0.1:8000/src/js/analysis.js:1028)
    at http://127.0.0.1:8000/src/js/analysis.js:1410
    at http://127.0.0.1:8000/src/js/analysis.js:1236
    at G (http://127.0.0.1:8000/src/js/analysis.js:541)
    at http://127.0.0.1:8000/tests/tizen/annex/lib/jquery-1.6.2.min_jalangi_.js:1222
    at invokeFun (http://127.0.0.1:8000/src/js/analysis.js:494)
    at http://127.0.0.1:8000/src/js/analysis.js:585
    at http://127.0.0.1:8000/tests/tizen/annex/lib/jquery-1.6.2.min_jalangi_.js:13591
Got message TypeError: 'undefined' is not an object (evaluating 'g.apply')
Got message TypeError: 'undefined' is not an object (evaluating 'g.apply')
    at invokeFun (http://127.0.0.1:8000/src/js/analysis.js:494)
    at http://127.0.0.1:8000/src/js/analysis.js:585
    at http://127.0.0.1:8000/tests/tizen/annex/js/annex_jalangi_.js:1462
loaded
Got message hello
Got message [3,"tests/tizen/annex/lib/jquery-1.6.2.min_jalangi_.js",88149,0,6]
,[4,1,88141,1,17]
,[4,3,17473,3,8]
,[4,5,17481,5,8]
,[3,"tests/tizen/annex/js/annex_jalangi_.js",11097,7,6]
,[4,3,9889,10,17]

The trace is printing, which is good, but there are some other JS errors I can't fully grok. @ksen007, any idea what could be going wrong? PhantomJS is based on Webkit, but not the absolute latest version. This is not super urgent, but if we could get this working sometime, that would be great.

[msridhar]

This works now, although unfortunately the old version of Webkit in PhantomJS makes this less useful than I had hoped.