js/src/jit-test/tests/debug/Frame-onStep-lines-01.js@6474c204b198
js/src/jit-test/tests/debug/Frame-onStep-lines-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.
1 // Test that a frame's onStep handler gets called at least once on each line of a function.
3 var g = newGlobal();
4 var dbg = new Debugger(g);
6 // When we hit a 'debugger' statement, set offsets to the frame's script's
7 // table of line offsets --- a sparse array indexed by line number. Begin
8 // single-stepping the current frame; for each source line we hit, delete
9 // the line's entry in offsets. Thus, at the end, offsets is an array with
10 // an element for each line we did not reach.
11 var doSingleStep = true;
12 var offsets;
13 dbg.onDebuggerStatement = function (frame) {
14 var script = frame.script;
15 offsets = script.getAllOffsets();
16 print("debugger line: " + script.getOffsetLine(frame.offset));
17 print("original lines: " + uneval(Object.keys(offsets)));
18 if (doSingleStep) {
19 frame.onStep = function onStepHandler() {
20 var line = script.getOffsetLine(this.offset);
21 delete offsets[line];
22 };
23 }
24 };
26 g.eval(
27 'function t(a, b, c) { \n' +
28 ' debugger; \n' +
29 ' var x = a; \n' +
30 ' x += b; \n' +
31 ' if (x < 10) \n' +
32 ' x -= c; \n' +
33 ' return x; \n' +
34 '} \n'
35 );
37 // This should stop at every line but the first of the function.
38 g.eval('t(1,2,3)');
39 assertEq(Object.keys(offsets).length, 1);
41 // This should stop at every line but the first of the function, and the
42 // body of the 'if'.
43 g.eval('t(10,20,30)');
44 assertEq(Object.keys(offsets).length, 2);
46 // This shouldn't stop at all. It's the frame that's in single-step mode,
47 // not the script, so the prior execution of t in single-step mode should
48 // have no effect on this one.
49 doSingleStep = false;
50 g.eval('t(0, 0, 0)');
51 assertEq(Object.keys(offsets).length, 6);
52 doSingleStep = true;
54 // Single-step in an eval frame. This should reach every line but the
55 // first.
56 g.eval(
57 'debugger; \n' +
58 'var a=1, b=2, c=3; \n' +
59 'var x = a; \n' +
60 'x += b; \n' +
61 'if (x < 10) \n' +
62 ' x -= c; \n'
63 );
64 print("final lines: " + uneval(Object.keys(offsets)));
65 assertEq(Object.keys(offsets).length, 1);
67 // Single-step in a global code frame. This should reach every line but the
68 // first.
69 g.evaluate(
70 'debugger; \n' +
71 'var a=1, b=2, c=3; \n' +
72 'var x = a; \n' +
73 'x += b; \n' +
74 'if (x < 10) \n' +
75 ' x -= c; \n'
76 );
77 print("final lines: " + uneval(Object.keys(offsets)));
78 assertEq(Object.keys(offsets).length, 1);
