1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/shared/source-map-loader/utils/getOriginalStackFrames.js b/devtools/client/shared/source-map-loader/utils/getOriginalStackFrames.js
new file mode 100644
index 0000000000..c1ffee10e4
--- /dev/null
+++ b/devtools/client/shared/source-map-loader/utils/getOriginalStackFrames.js
@@ -0,0 +1,38 @@
+/* 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/>. */
+
+"use strict";
+
+const {
+  getWasmXScopes,
+} = require("resource://devtools/client/shared/source-map-loader/wasm-dwarf/wasmXScopes");
+const {
+  getSourceMap,
+} = require("resource://devtools/client/shared/source-map-loader/utils/sourceMapRequests");
+const {
+  generatedToOriginalId,
+} = require("resource://devtools/client/shared/source-map-loader/utils/index");
+
+// Returns expanded stack frames details based on the generated location.
+// The function return null if not information was found.
+async function getOriginalStackFrames(generatedLocation) {
+  const wasmXScopes = await getWasmXScopes(generatedLocation.sourceId, {
+    getSourceMap,
+    generatedToOriginalId,
+  });
+  if (!wasmXScopes) {
+    return null;
+  }
+
+  const scopes = wasmXScopes.search(generatedLocation);
+  if (scopes.length === 0) {
+    console.warn("Something wrong with debug data: none original frames found");
+    return null;
+  }
+  return scopes;
+}
+
+module.exports = {
+  getOriginalStackFrames,
+};