| // When a recursive function has many frames on the stack, onStep may be set or |
| // not independently on each frame. |
| |
| var g = newGlobal(); |
| g.eval("function f(x) {\n" + |
| " if (x > 0)\n" + |
| " f(x - 1);\n" + |
| " else\n" + |
| " debugger;\n" + |
| " return x;\n" + |
| "}"); |
| |
| var dbg = Debugger(g); |
| var seen = [0, 0, 0, 0, 0, 0, 0, 0]; |
| function step() { |
| seen[this.arguments[0]] = 1; |
| } |
| dbg.onEnterFrame = function (frame) { |
| // Turn on stepping for even-numbered frames. |
| var x = frame.arguments[0]; |
| if (x % 2 === 0) |
| frame.onStep = step; |
| }; |
| dbg.onDebuggerStatement = function (frame) { |
| // This is called with 8 call frames on the stack, 7 down to 0. |
| // At this point we should have seen all the even-numbered frames. |
| assertEq(seen.join(""), "10101010"); |
| |
| // Now reset seen to see which frames fire onStep on the way out. |
| seen = [0, 0, 0, 0, 0, 0, 0, 0]; |
| }; |
| |
| g.f(7); |
| assertEq(seen.join(""), "10101010"); |