gdb-multiarch-mcp

Instructions

Implementation Reference

• src/gdb_multiarch_mcp/gdb_interface.py:747-776 (handler)

  The `get_backtrace` method in `GDBSession` class. This method switches to the specified thread (if any) and then retrieves the backtrace using the GDB/MI `-stack-list-frames` command.

  def get_backtrace(
      self, thread_id: Optional[int] = None, max_frames: int = DEFAULT_MAX_BACKTRACE_FRAMES
  ) -> dict[str, Any]:
      """
      Get the stack backtrace for a specific thread or the current thread.
  
      Args:
          thread_id: Thread ID to get backtrace for (None for current thread)
          max_frames: Maximum number of frames to retrieve
  
      Returns:
          Dict with backtrace information
      """
      # Switch to thread if specified
      if thread_id is not None:
          switch_result = self.execute_command(f"-thread-select {thread_id}")
          if switch_result["status"] == "error":
              return switch_result
  
      # Get stack trace
      result = self.execute_command(f"-stack-list-frames 0 {max_frames}")
  
      if result["status"] == "error":
          return result
  
      stack_data = self._extract_mi_result(result) or {}
      frames = stack_data.get("stack", [])
  
      return {"status": "success", "thread_id": thread_id, "frames": frames, "count": len(frames)}