Function get_function_id

tools/wasm-sourcemap.py:530–548

(address)

  # Get the function name ID that the given address falls into
  def get_function_id(address):
    nonlocal active_funcs
    nonlocal next_func_range_id

    # Maintain a list of "active functions" whose ranges currently cover the
    # address. As the address advances, it adds new functions that start and
    # removes functions that end. The last function remaining in the active list
    # at any point is the innermost function.
    while next_func_range_id < len(func_ranges) and func_ranges[next_func_range_id].low_pc <= address:
      # active_funcs contains (high_pc, id) pair
      active_funcs.append((func_ranges[next_func_range_id].high_pc, next_func_range_id))
      next_func_range_id += 1
    active_funcs = [f for f in active_funcs if f[0] > address]

    if active_funcs:
      func_range_id = active_funcs[-1][1]
      name = func_ranges[func_range_id].name
      return name_to_id[name]
    return None

  for entry in entries:
    line = entry['line']