The Tor Browser: js/src/jit-test/tests/debug/Frame-onPop-multiple-01.js@6474c204b198 (annotated)

js/src/jit-test/tests/debug/Frame-onPop-multiple-01.js@6474c204b198 (annotated)

js/src/jit-test/tests/debug/Frame-onPop-multiple-01.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Multiple debuggers all get their onPop handlers called, and see each others' effects.
 function completionsEqual(c1, c2) {
     if (c1 && c2) {
         if (c1.throw)
             return c1.throw === c2.throw;
         else
             return c1.return === c2.return;
     }
     return c1 === c2;
 }
 function completionString(c) {
     if (c == null)
         return 'x';
     if (c.return)
         return 'r' + c.return;
     if (c.throw)
         return 't' + c.throw;
     return '?';
 }
 var g = newGlobal(); // poor thing
 g.eval('function f() { debugger; return "1"; }');
 // We create a bunch of debuggers, but they all consult this global variable
 // for expectations and responses, so the order in which events get
 // reported to the debuggers doesn't matter.
 //
 // This list includes every pair of transitions, and is of minimal length.
 // As if opportunity cost were just some theoretical concern.
 var sequence = [{ expect: { return: '1' }, resume: { return: '2'} },
                 { expect: { return: '2' }, resume: { throw:  '3'} },
                 { expect: { throw:  '3' }, resume: { return: '4'} },
                 { expect: { return: '4' }, resume: null },
                 { expect: null,            resume: { throw:  '5'} },
                 { expect: { throw:  '5' }, resume: { throw:  '6'} },
                 { expect: { throw:  '6' }, resume: null           },
                 { expect: null,            resume: null           },
                 { expect: null,            resume: { return: '7'} }];
 // A list of the debuggers' Debugger.Frame instances. When it's all over,
 // we test that they are all marked as no longer live.
 var frames = [];
 // We start off the test via Debugger.Frame.prototype.eval, so if we end
 // with a termination, we still catch it, instead of aborting the whole
 // test. (Debugger.Object.prototype.evalInGlobal would simplify this...)
 var dbg0 = new Debugger(g);
 dbg0.onEnterFrame = function handleOriginalEnter(frame) {
     dbg0.log += '(';
     dbg0.onEnterFrame = undefined;
     assertEq(frame.live, true);
     frames.push(frame);
     var dbgs = [];
     var log;
     // Create a separate debugger to carry out each item in sequence.
     for (s in sequence) {
         // Each debugger's handlers close over a distinct 'dbg', but
         // that's the only distinction between them. Otherwise, they're
         // driven entirely by global data, so the order in which events are
         // dispatched to them shouldn't matter.
         let dbg = new Debugger(g);
         dbgs.push(dbg);
         dbg.onDebuggerStatement = function handleDebuggerStatement(f) {
             log += 'd';
             assertEq(f.live, true);
             frames.push(f);
         };
         // First expect the 'eval'...
         dbg.onEnterFrame = function handleEnterEval(f) {
             log += 'e';
             assertEq(f.type, 'eval');
             assertEq(f.live, true);
             frames.push(f);
             // Then expect the call.
             dbg.onEnterFrame = function handleEnterCall(f) {
                 log += '(';
                 assertEq(f.type, 'call');
                 assertEq(f.live, true);
                 frames.push(f);
                 // Don't expect any further frames.
                 dbg.onEnterFrame = function handleExtraEnter(f) {
                     log += 'z';
                 };
                 f.onPop = function handlePop(c) {
                     log += ')' + completionString(c);
                     assertEq(this.live, true);
                     frames.push(this);
                     // Check that this debugger is in the list, and then remove it.
                     var i = dbgs.indexOf(dbg);
                     assertEq(i != -1, true);
                     dbgs.splice(i,1);
                     // Check the frame's completion value against 'sequence'.
                     assertEq(completionsEqual(c, sequence[0].expect), true);
                     // Provide the next resumption value from 'sequence'.
                     return sequence.shift().resume;
                 };
             };
         };
     }
     log = '';
     assertEq(completionsEqual(frame.eval('f()'), { return: '7' }), true);
     assertEq(log, "eeeeeeeee(((((((((ddddddddd)r1)r2)t3)r4)x)t5)t6)x)x");
     dbg0.log += '.';
 };
 dbg0.log = '';
 g.eval('eval');
 assertEq(dbg0.log, '(.');
 // Check that all Debugger.Frame instances we ran into are now marked as dead.
 for (var i = 0; i < frames.length; i++)
     assertEq(frames[i].live, false);