base / allocator / allocator.gni [blame]

# Copyright 2019 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//base/allocator/partition_allocator/partition_alloc.gni")

# Chromium-specific asserts. External embedders _may_ elect to use these
# features even without PA-E.
if (!use_partition_alloc_as_malloc) {
  # In theory, BackupRefPtr will work just fine without
  # PartitionAlloc-Everywhere, but its scope would be limited to partitions
  # that are invoked explicitly (not via malloc). These are only Blink
  # partition, where we currently don't even use raw_ptr<T>.
  assert(!enable_backup_ref_ptr_support,
         "Chromium does not use BRP without PA-E")

  # Pointer compression works only if all pointers are guaranteed to be
  # allocated by PA (in one of its core pools, to be precise). In theory,
  # this could be useful with partitions that are invoked explicitly. In
  # practice, the pointers we have in mind for compression (scoped_refptr<>,
  # unique_ptr<>) require PA-E.
  assert(!enable_pointer_compression_support,
         "Pointer compressions likely doesn't make sense without PA-E")
}

assert(use_allocator_shim || !use_partition_alloc_as_malloc,
       "PartitionAlloc-Everywhere requires the allocator shim")