static_initializers.gni

# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/features.gni")
import("//build/config/sanitizers/sanitizers.gni")
import("//ui/gl/features.gni")

# The monochrome_static_initializers target will cause release bots to fail if
# the count of static initializers change in either direction. Please try not to
# increase the numbers. If they come from third-party code, please try to update
# the code, or apply a local modification to remove them.
#
# Some helpful hints at //docs/static_initializers.md
#
# Define expectations only for GN args covered by trybots.
if (current_toolchain == default_toolchain &&
    (target_cpu == "arm" || target_cpu == "arm64") &&
    (!is_debug && !using_sanitizer && proprietary_codecs)) {
  # Comments show static_initializers according to
  # tools/linux/dump-static-initializers.py.

  # 000101 (initializer offset 0x142e924 size 0xc)
  # std::__1::ios_base::Init::Init()
  #
  # iostream.cpp (initializer offset 0x142e930 size 0x2)
  #   [empty ctor, but it still has cost on gcc <4.6]
  expected_static_initializer_count = 2

  # TODO(https://crbug.com/1177849): Remove from tflite:
  # tflite_engine.cc (initializer offset 0x34cb88c size 0x2c)
  #   __ThumbV7PILongThunk__ZNSt3__18ios_base4InitC1Ev
  #   __ThumbV7PILongThunk___cxa_atexit
  expected_static_initializer_count += 1

  # From v8 I think:
  # token.cc (initializer offset 0x27f024c size 0x11c)
  expected_static_initializer_count += 1

  # This one is from //third_party/gvr-android-sdk
  # base_logging.cc (initializer offset 0x9a4b0c size 0x48)
  expected_static_initializer_count += 1

  if (use_static_angle && !is_official_build) {
    # TODO(https://crbug.com/1172451): remove global variables from ANGLE:
    #
    # doc.cpp (initializer offset 0xcf9c6c size 0x138)
    # SPVRemapper.cpp (initializer offset 0xcf2924 size 0x64)
    expected_static_initializer_count += 2
  }
}