control_flow_guard.gni

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# Copyright 2020 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/sanitizers/sanitizers.gni")

declare_args() {

  # Set this to true to enable generation of CFG indirect call dispatch

  # guards.

  win_enable_cfg_guards = false

if (win_enable_cfg_guards) {

  # Control Flow Guard (CFG)

  # https://msdn.microsoft.com/en-us/library/windows/desktop/mt637065.aspx

  # /DYNAMICBASE (ASLR) is turned off in debug builds, therefore CFG can't be

  # turned on either.

  # ASan and CFG leads to slow process startup. Chromium's test runner uses

  # lots of child processes, so this means things are really slow. Disable CFG

  # for now. https://crbug.com/846966

  assert(!is_debug && !is_asan,

         "CFG does not work well in debug builds or with ASAN")