Cocos2d-X安卓应用新增arm64支持后Firebase Crashlytics空栈崩溃求助

Hey there, let's tackle this empty stack trace crash issue after adding arm64_v8a support to your Cocos2d-X Android app. Here are some targeted steps to debug and fix this:

• First, double-check that all required .so files are properly packaged into the arm64_v8a directory of your APK. It's common to miss copying some libraries when adding a new architecture—use the command unzip -l your-app.apk to list files under lib/arm64_v8a/ and compare it with the armeabi_v7a directory to ensure parity.
• Make sure every third-party dependency (including Firebase Crashlytics itself) provides an arm64_v8a version of their libraries. If a dependency only has an armeabi_v7a build, loading it on an arm64 device will crash, and often leads to empty stack traces.

• Crashlytics needs matching native symbol files to decode stack traces. After adding arm64_v8a support, you must ensure you're uploading symbols for this architecture too.
• Check your Gradle build script to confirm automatic symbol upload is enabled for all ABIs, including arm64_v8a. If you upload symbols manually, verify the package includes arm64_v8a symbols (usually found in app/build/intermediates/cmake/release/obj/arm64-v8a/ for Cocos2d-X projects).
• Note: Without debug symbols compiled into your .so files (via the -g compiler flag), Crashlytics can't resolve stack traces—double-check your Cocos2d-X build config hasn't stripped these symbols for release builds.

• Ensure your Gradle file correctly lists both armeabi-v7a and arm64-v8a in ndk.abiFilters—missing either can lead to incomplete builds or unexpected runtime behavior.
• Verify that the Cocos2d-X build script is generating arm64_v8a libraries properly. Sometimes, custom build scripts might hardcode architectures, so confirm it's set to build for both target ABIs.

• Empty stack traces can sometimes stem from emulator compatibility issues. Grab a real arm64_v8a device, connect it via USB, and run adb logcat to capture real-time logs. You might catch detailed errors (like library load failures or JNI errors) that Crashlytics doesn't pick up in its offline crash reports.
• Run the app in debug mode on the device—Android Studio's Logcat will often show a full stack trace for crashes, which is far easier to debug than the empty Crashlytics report.

• Arm64 uses 64-bit pointers, which can break JNI code that relies on 32-bit assumptions. Audit your custom JNI code and any Cocos2d-X JNI bindings for issues like hardcoded memory sizes, incorrect type casts, or architecture-specific assembly that hasn't been ported to arm64.
• Look for errors like UnsatisfiedLinkError in logcat—this usually signals a missing or incompatible native library for the device's architecture.

• If the crash is related to Crashlytics itself, confirm the native Crashlytics libraries are present in the arm64_v8a directory. Re-run the Crashlytics setup steps to ensure the SDK is properly integrated for all target architectures.

内容的提问来源于stack exchange，提问作者Zoran