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-rw-r--r--js/src/jit-test/tests/debug/Frame-onStep-04.js34
1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onStep-04.js b/js/src/jit-test/tests/debug/Frame-onStep-04.js
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index 000000000..d144a3988
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+++ b/js/src/jit-test/tests/debug/Frame-onStep-04.js
@@ -0,0 +1,34 @@
+// 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");