| # Copyright 2022 The PDFium Authors |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import("//build/config/c++/c++.gni") |
| import("//build/config/sanitizers/sanitizers.gni") |
| |
| # Sanitizers replace the allocator, don't use our own allocator. |
| _is_using_sanitizers = is_asan || is_hwasan || is_lsan || is_tsan || is_msan |
| |
| # - Component build support is disabled on all platforms except Linux. It is |
| # known to cause issues on some (e.g. Windows with shims, Android with |
| # non-universal symbol wrapping), and has not been validated on others. |
| # - Windows: debug CRT is not compatible, see below. |
| _disable_partition_alloc_everywhere = |
| (!is_linux && is_component_build) || (is_win && is_debug) |
| |
| # Under Windows debug build, the allocator shim is not compatible with CRT. |
| # Under Fuchsia, the allocator shim is only required for PA-E. |
| # For all other platforms & configurations, the shim is required, to replace |
| # the default system allocators, e.g. with Partition Alloc. |
| |
| # Additionally: |
| # - The allocator shim does not work with macOS with use_custom_libcxx=false. |
| # - The allocator shim isn't working standalone on Windows at the moment. |
| # See crbug.com/pdfium/2068. |
| if ((is_linux || is_chromeos || is_android || is_apple || |
| (is_fuchsia && !_disable_partition_alloc_everywhere) || |
| (is_win && !is_component_build && !is_debug)) && !_is_using_sanitizers && |
| (!is_mac || use_custom_libcxx) && !is_win) { |
| _use_shim = true |
| } else { |
| _use_shim = false |
| } |
| |
| if (_use_shim && !_disable_partition_alloc_everywhere) { |
| _default_allocator = "partition" |
| } else { |
| _default_allocator = "none" |
| } |
| |
| # See base/allocator/partition_allocator/external_builds.md |
| use_allocator_shim_default = _use_shim |
| use_partition_alloc_as_malloc_default = _default_allocator == "partition" |
| |
| _is_brp_supported = (is_win || is_android || is_linux || is_mac || |
| is_chromeos) && use_partition_alloc_as_malloc_default |
| |
| enable_backup_ref_ptr_support_default = _is_brp_supported |
| |
| enable_mte_checked_ptr_support_default = false |
| put_ref_count_in_previous_slot_default = true |
| enable_backup_ref_ptr_slow_checks_default = false |
| enable_dangling_raw_ptr_checks_default = false |
| raw_ptr_zero_on_construct_default = true |
| raw_ptr_zero_on_move_default = true |
| raw_ptr_zero_on_destruct_default = false |