The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/jsd/test/test_jsval_retval.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,42 @@
     1.4 +// Bug 689101 - if the binary layout of jsval does not match between C and C++
     1.5 +// code, then calls to functions returning jsval may get compiled differently
     1.6 +// than the callee, resulting in parameters being shifted over by one.
     1.7 +//
     1.8 +// An example is where on Windows, calling jsdValue.getWrappedValue() will
     1.9 +// return a random floating point number instead of an object.
    1.10 +//
    1.11 +// This test must be run with debugging already enabled
    1.12 +
    1.13 +function run_test() {
    1.14 +    const Cc = Components.classes;
    1.15 +    const Ci = Components.interfaces;
    1.16 +    const DebuggerService = Cc["@mozilla.org/js/jsd/debugger-service;1"];
    1.17 +    const jsdIDebuggerService = Ci.jsdIDebuggerService;
    1.18 +    var jsd = DebuggerService.getService(jsdIDebuggerService);
    1.19 +
    1.20 +    do_check_true(jsd.isOn);
    1.21 +
    1.22 +    var n = 0;
    1.23 +    function f() {
    1.24 +        n++;
    1.25 +    }
    1.26 +
    1.27 +    jsd.enumerateScripts({ enumerateScript: function(script) {
    1.28 +        script.setBreakpoint(0);
    1.29 +    } });
    1.30 +
    1.31 +    jsd.breakpointHook = function(frame, type, dummy) {
    1.32 +        var scope = frame.scope;
    1.33 +        var parent = scope.jsParent; // Probably does not need to be called
    1.34 +        var wrapped = scope.getWrappedValue();
    1.35 +        // Do not try to print 'wrapped'; it may be an internal Call object
    1.36 +        // that will crash when you toString it. Different bug.
    1.37 +        do_check_eq(typeof(wrapped), "object");
    1.38 +        return Ci.jsdIExecutionHook.RETURN_CONTINUE;
    1.39 +    };
    1.40 +
    1.41 +    f();
    1.42 +
    1.43 +    jsd.breakpointHook = null;
    1.44 +    jsd = null;
    1.45 +}