1 files changed, 107 insertions, 0 deletions
diff --git a/mobile/android/modules/geckoview/ChildCrashHandler.sys.mjs b/mobile/android/modules/geckoview/ChildCrashHandler.sys.mjs
new file mode 100644
index 0000000000..52a929511a
--- /dev/null
+++ b/mobile/android/modules/geckoview/ChildCrashHandler.sys.mjs
@@ -0,0 +1,107 @@
+/* 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/. */
+
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  EventDispatcher: "resource://gre/modules/Messaging.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("ChildCrashHandler");
+
+function getDir(name) {
+  const uAppDataPath = Services.dirsvc.get("UAppData", Ci.nsIFile).path;
+  return PathUtils.join(uAppDataPath, "Crash Reports", name);
+}
+
+function getPendingMinidump(id) {
+  const pendingDir = getDir("pending");
+
+  return [".dmp", ".extra"].map(suffix => {
+    return PathUtils.join(pendingDir, `${id}${suffix}`);
+  });
+}
+
+export var ChildCrashHandler = {
+  // Map a child ID to a remote type.
+  childMap: new Map(),
+
+  // The event listener for this is hooked up in GeckoViewStartup.jsm
+  observe(aSubject, aTopic, aData) {
+    const childID = aData;
+
+    switch (aTopic) {
+      case "process-type-set":
+      // Intentional fall-through
+      case "ipc:content-created": {
+        const pp = aSubject.QueryInterface(Ci.nsIDOMProcessParent);
+        this.childMap.set(childID, pp.remoteType);
+        break;
+      }
+
+      case "ipc:content-shutdown":
+      // Intentional fall-through
+      case "compositor:process-aborted": {
+        aSubject.QueryInterface(Ci.nsIPropertyBag2);
+
+        const disableReporting = Services.env.get(
+          "MOZ_CRASHREPORTER_NO_REPORT"
+        );
+
+        if (
+          !aSubject.get("abnormal") ||
+          !AppConstants.MOZ_CRASHREPORTER ||
+          disableReporting
+        ) {
+          return;
+        }
+
+        // If dumpID is empty the process was likely killed by the system and
+        // we therefore do not want to report the crash. This includes most
+        // "expected" extensions process crashes on Android.
+        const dumpID = aSubject.get("dumpID");
+        if (!dumpID) {
+          Services.telemetry
+            .getHistogramById("FX_CONTENT_CRASH_DUMP_UNAVAILABLE")
+            .add(1);
+          return;
+        }
+
+        debug`Notifying child process crash, dump ID ${dumpID}`;
+        const [minidumpPath, extrasPath] = getPendingMinidump(dumpID);
+
+        let remoteType = this.childMap.get(childID);
+        this.childMap.delete(childID);
+
+        if (remoteType?.length) {
+          // Only send the remote type prefix since everything after a "=" is
+          // dynamic, and used to control the process pool to use.
+          remoteType = remoteType.split("=")[0];
+        }
+
+        // Report GPU and extension process crashes as occuring in a background
+        // process, and others as foreground.
+        const processType =
+          aTopic === "compositor:process-aborted" || remoteType === "extension"
+            ? "BACKGROUND_CHILD"
+            : "FOREGROUND_CHILD";
+
+        lazy.EventDispatcher.instance.sendRequest({
+          type: "GeckoView:ChildCrashReport",
+          minidumpPath,
+          extrasPath,
+          success: true,
+          fatal: false,
+          processType,
+          remoteType,
+        });
+
+        break;
+      }
+    }
+  },
+};