allocator.gni

# Copyright 2014 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")

# Temporarily disable tcmalloc on arm64 linux to get rid of compilation errors.
if (is_android || is_mac || is_ios || is_asan || is_lsan || is_tsan ||
    is_msan || is_win || is_fuchsia || (is_linux && target_cpu == "arm64")) {
  _default_allocator = "none"
} else {
  _default_allocator = "tcmalloc"
}

# The debug CRT on Windows has some debug features that are incompatible with
# the shim. NaCl in particular does seem to link some binaries statically
# against the debug CRT with "is_nacl=false".
if ((is_linux || is_android || is_mac ||
     (is_win && !is_component_build && !is_debug)) && !is_asan && !is_hwasan &&
    !is_lsan && !is_tsan && !is_msan) {
  _default_use_allocator_shim = true
} else {
  _default_use_allocator_shim = false
}

declare_args() {
  # Memory allocator to use. Set to "none" to use default allocator.
  use_allocator = _default_allocator

  # Causes all the allocations to be routed via allocator_shim.cc.
  use_allocator_shim = _default_use_allocator_shim

  # Partition alloc is included by default except iOS.
  use_partition_alloc = !is_ios

  # Use the new tcmalloc. It's relevant only when use_allocator == "tcmalloc".
  use_new_tcmalloc = true
}

if (is_nacl) {
  # Turn off the build flag for NaCL builds to minimize confusion, as NaCL
  # doesn't support the heap shim.
  use_allocator_shim = false
}

assert(use_allocator == "none" || use_allocator == "tcmalloc")

assert(!is_win || use_allocator == "none", "Tcmalloc doesn't work on Windows.")
assert(!is_mac || use_allocator == "none", "Tcmalloc doesn't work on macOS.")

assert(
    !use_allocator_shim || is_linux || is_android || is_win || is_mac,
    "use_allocator_shim is supported only on Linux, Android, Windows and macOS targets")

if (is_win && use_allocator_shim) {
  assert(!is_component_build,
         "The allocator shim doesn't work for the component build on Windows.")
}