1 files changed, 60 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/actions/pause/mapDisplayNames.js b/devtools/client/debugger/src/actions/pause/mapDisplayNames.js
new file mode 100644
index 0000000000..f4b916afda
--- /dev/null
+++ b/devtools/client/debugger/src/actions/pause/mapDisplayNames.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// @flow
+
+import { getFrames, getSymbols, getSource } from "../../selectors";
+
+import { findClosestFunction } from "../../utils/ast";
+
+import type { Frame, ThreadContext } from "../../types";
+import type { ThunkArgs } from "../types";
+
+function mapDisplayName(frame: Frame, { getState }) {
+  if (frame.isOriginal) {
+    return frame;
+  }
+
+  const source = getSource(getState(), frame.location.sourceId);
+
+  if (!source) {
+    return frame;
+  }
+
+  const symbols = getSymbols(getState(), source);
+
+  if (!symbols || !symbols.functions) {
+    return frame;
+  }
+
+  const originalFunction = findClosestFunction(symbols, frame.location);
+
+  if (!originalFunction) {
+    return frame;
+  }
+
+  const originalDisplayName = originalFunction.name;
+  return { ...frame, originalDisplayName };
+}
+
+export function mapDisplayNames(cx: ThreadContext) {
+  return function({ dispatch, getState }: ThunkArgs) {
+    const frames = getFrames(getState(), cx.thread);
+
+    if (!frames) {
+      return;
+    }
+
+    const mappedFrames = frames.map(frame =>
+      mapDisplayName(frame, { getState })
+    );
+
+    dispatch({
+      type: "MAP_FRAME_DISPLAY_NAMES",
+      cx,
+      thread: cx.thread,
+      frames: mappedFrames,
+    });
+  };
+}