83 lines
3.0 KiB
Plaintext
83 lines
3.0 KiB
Plaintext
# Copyright (c) 2022 Huawei Device Co., Ltd.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import("//build/config/clang/clang.gni")
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declare_args() {
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# Enable the config that variables are automatically initialized by default.
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enable_auto_var_init = false
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support_stack_protector_ret = false
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}
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using_security_flag = enable_auto_var_init
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if (!is_ohos) {
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using_security_flag = false
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}
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# support_stack_protector_ret = true if clang support -fstack-protector-ret-all
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clang_bin = rebase_path("${default_clang_base_path}/bin/clang", root_build_dir)
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cmd = "${clang_bin} --help | grep fstack-protector-ret-all | wc -l"
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# exec_script returns 1 if grep -fstack-protector-ret-all failed, indicating -fstack-protector-ret-all not supported
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res = exec_script("//build/scripts/run_shell_cmd.py", [ cmd ], "value")
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if (target_cpu == "arm64" && res == 1 && is_ohos && is_standard_system &&
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!is_mingw) {
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support_stack_protector_ret = true
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} else {
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support_stack_protector_ret = false
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}
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assert(
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!using_security_flag || is_clang,
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"automatic variable initialization requires setting is_clang = true in 'gn args'")
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template("ohos_auto_initialize_config") {
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config(target_name) {
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forward_variables_from(invoker, [ "auto_var_init" ])
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configs = []
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# Currently, only the clang compiler and standard system support automatic variable initialization.
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if (is_clang && is_standard_system) {
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if (defined(auto_var_init)) {
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assert(
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auto_var_init == "pattern" || auto_var_init == "zero" ||
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auto_var_init == "uninit",
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"auto_var_init can only be set to pattern, zero or uninit, for example, auto_var_init = \"pattern\"")
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if (auto_var_init == "pattern") {
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configs += [ "//build/config/security:auto_var_pattern_init_config" ]
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} else if (auto_var_init == "zero") {
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configs += [ "//build/config/security:auto_var_zero_init_config" ]
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} else if (auto_var_init == "uninit") {
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configs += [ "//build/config/security:auto_var_uninit_config" ]
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}
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} else {
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configs += [ "//build/config/security:auto_var_zero_init_config" ]
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}
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}
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}
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}
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template("ohos_security_config") {
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config(target_name) {
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configs = []
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_auto_initialize_config_target = "${target_name}__auto_initialize_config"
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ohos_auto_initialize_config(_auto_initialize_config_target) {
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forward_variables_from(invoker, [ "auto_var_init" ])
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}
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configs += [ ":$_auto_initialize_config_target" ]
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}
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}
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