1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Debugger-multi-01.js b/js/src/jit-test/tests/debug/Debugger-multi-01.js
new file mode 100644
index 000000000..cd29fc6de
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Debugger-multi-01.js
@@ -0,0 +1,31 @@
+// When there are multiple debuggers, their hooks are called in order.
+
+var g = newGlobal();
+var log;
+var arr = [];
+
+function addDebug(msg) {
+    var dbg = new Debugger(g);
+    dbg.onDebuggerStatement = function (stack) { log += msg; };
+    arr.push(dbg);
+}
+
+addDebug('a');
+addDebug('b');
+addDebug('c');
+
+log = '';
+assertEq(g.eval("debugger; 0;"), 0);
+assertEq(log, 'abc');
+
+// Calling debugger hooks stops as soon as any hook returns a resumption value
+// other than undefined.
+
+arr[0].onDebuggerStatement = function (stack) {
+    log += 'a';
+    return {return: 1};
+};
+
+log = '';
+assertEq(g.eval("debugger; 0;"), 1);
+assertEq(log, 'a');