This bug tracks implementation of armv8 (64-bit) support in PLCrashReporter, specifically:
- Implementing arm64 plcrash_async_thread_state_current().
- Extending the thread state APIs to support 64-bit ARM.
- Verifying compatibility with the existing stack frame walking mechanisms.
- Extending the Obj-C symbolication code to work with any ABI changes made for iOS/64-bit.
- Updating the formatter to include armv8 in the text-based report output.