Support modern React Native inspector

[vmoroz]

This PR introduces support for the modern React Native inspector (CDP-based debugger) to the hermes-windows project. It adds a new C-based API to enable an ABI-stable implementation for the new inspector.

The PR is built on top of the code that was originally created by @iamAbhi-916.

Changes:

• New C-based Inspector API (hermes_api.h, hermes_api.cpp)

  • A new C-API is introduced for the modern inspector. All functions are exposed through a hermes_inspector_vtable struct, which is retrieved using the new hermes_get_inspector_vtable function.
  • This API provides functionality for:
    • CDP Debugger: Creating and managing the CDP debug API instance (create_cdp_debug_api).
    • Console: Adding console messages (add_console_message). To pass console arguments from the client, this function retrieves them from a temporary property on the JavaScript global object, which is then immediately cleared.
    • CDP Agent: Creating and managing a CDP agent (create_cdp_agent), handling commands (cdp_agent_handle_command), and enabling runtime and debugger domains.
    • Sampling Profiler: Enabling (enable_sampling_profiler), disabling (disable_sampling_profiler), and collecting profiling data (collect_sampling_profile) with detailed callbacks for samples and stack frames.
  • The API uses a callback-based approach for tasks like enqueuing runtime tasks, sending messages to the frontend, and efficiently streaming sampling profiler data.

• Debugger Client Switching (InspectorProxy.cpp)

  • To allow hermes.dll to support both the legacy and modern debugger clients, a new global variable g_isOldInspectorInitialized has been added.
  • This flag is checked in the RuntimeWrapper constructor to determine whether to initialize the legacy inspector, ensuring that only one inspector is active at a time.

• Code Refinements

  • HermesApi.cpp: Resolved a non-standard layout warning related to the use of offsetof and applied code formatting for improved readability.
  • NodeApiJsiRuntime.cpp: Fixed a compiler issue. This change is noted to be temporary and should be moved to the node-api-jsi repository.

Microsoft Reviewers: Open in CodeFlow