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// When a recursive function has many frames on the stack, onStep may be set or
// not independently on each frame.
var g = newGlobal({newCompartment: true});
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");