1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/jit-test/lib/evalInFrame.js b/js/src/jit-test/lib/evalInFrame.js
new file mode 100644
index 0000000000..d429b3fb6a
--- /dev/null
+++ b/js/src/jit-test/lib/evalInFrame.js
@@ -0,0 +1,32 @@
+var evalInFrame = (function (global) {
+  var dbgGlobal = newGlobal({newCompartment: true});
+  var dbg = new dbgGlobal.Debugger();
+
+  return function evalInFrame(upCount, code) {
+    dbg.addDebuggee(global);
+
+    // Skip ourself.
+    var frame = dbg.getNewestFrame().older;
+    for (var i = 0; i < upCount; i++) {
+      if (!frame.older)
+        break;
+      frame = frame.older;
+    }
+
+    var completion = frame.eval(code);
+    if (completion.return) {
+      var v = completion.return;
+      if (typeof v === "object")
+        v = v.unsafeDereference();
+      return v;
+    }
+    if (completion.throw) {
+      var v = completion.throw;
+      if (typeof v === "object")
+        v = v.unsafeDereference();
+      throw v;
+    }
+    if (completion === null)
+      terminate();
+  };
+})(this);