1 files changed, 26 insertions, 0 deletions
diff --git a/js/xpconnect/tests/chrome/test_bug732665_meta.js b/js/xpconnect/tests/chrome/test_bug732665_meta.js
new file mode 100644
index 000000000..a2afddd98
--- /dev/null
+++ b/js/xpconnect/tests/chrome/test_bug732665_meta.js
@@ -0,0 +1,26 @@
+var bottom = stackPointerInfo();
+var top = bottom;
+
+function nearNativeStackLimit() {
+  function inner() {
+    try {
+      with ({}) { // keep things predictable -- stay in the interpreter
+        top = stackPointerInfo();
+        var stepsFromLimit = eval("inner()"); // Use eval to force a number of native stackframes to be created.
+      }
+      return stepsFromLimit + 1;
+    } catch(e) {
+      // It would be nice to check here that the exception is actually an
+      // over-recursion here. But doing so would require toString()ing the
+      // exception, which we may not have the stack space to do.
+      return 1;
+    }
+  }
+  return inner();
+}
+
+var nbFrames = nearNativeStackLimit();
+var frameSize = bottom - top;
+print("Max stack size:", frameSize, "bytes",
+      "\nMaximum number of frames:", nbFrames,
+      "\nAverage frame size:", Math.ceil(frameSize / nbFrames), "bytes");