124 lines
4.4 KiB
C++
124 lines
4.4 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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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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*/
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#include "interface_utils.h"
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#include <fstream>
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#include <sstream>
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#include <android-base/strings.h>
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#include <hidl-util/FqInstance.h>
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using android::FqInstance;
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using android::FQName;
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using android::base::Error;
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namespace android {
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namespace init {
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namespace {
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std::string FQNamesToString(const std::set<FQName>& fqnames) {
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std::set<std::string> fqname_strings;
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for (const FQName& fqname : fqnames) {
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fqname_strings.insert(fqname.string());
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}
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return android::base::Join(fqname_strings, " ");
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}
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} // namespace
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Result<void> CheckInterfaceInheritanceHierarchy(const std::set<std::string>& instances,
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const InterfaceInheritanceHierarchyMap& hierarchy) {
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std::set<FQName> interface_fqnames;
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for (const std::string& instance : instances) {
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// There is insufficient build-time information on AIDL interfaces to check them here
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// TODO(b/139307527): Rework how services store interfaces to avoid excess string parsing
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if (base::Split(instance, "/")[0] == "aidl") {
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continue;
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}
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FqInstance fqinstance;
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if (!fqinstance.setTo(instance)) {
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return Error() << "Unable to parse interface instance '" << instance << "'";
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}
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interface_fqnames.insert(fqinstance.getFqName());
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}
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return CheckInterfaceInheritanceHierarchy(interface_fqnames, hierarchy);
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}
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Result<void> CheckInterfaceInheritanceHierarchy(const std::set<FQName>& interfaces,
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const InterfaceInheritanceHierarchyMap& hierarchy) {
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std::ostringstream error_stream;
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for (const FQName& intf : interfaces) {
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if (hierarchy.count(intf) == 0) {
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error_stream << "\nInterface is not in the known set of hidl_interfaces: '"
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<< intf.string()
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<< "'. Please ensure the interface is spelled correctly and built "
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<< "by a hidl_interface target.";
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continue;
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}
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const std::set<FQName>& required_interfaces = hierarchy.at(intf);
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std::set<FQName> diff;
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std::set_difference(required_interfaces.begin(), required_interfaces.end(),
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interfaces.begin(), interfaces.end(),
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std::inserter(diff, diff.begin()));
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if (!diff.empty()) {
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error_stream << "\nInterface '" << intf.string() << "' requires its full inheritance "
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<< "hierarchy to be listed in this init_rc file. Missing "
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<< "interfaces: [" << FQNamesToString(diff) << "]";
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}
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}
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const std::string& errors = error_stream.str();
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if (!errors.empty()) {
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return Error() << errors;
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}
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return {};
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}
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std::optional<std::set<FQName>> known_interfaces;
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void SetKnownInterfaces(const InterfaceInheritanceHierarchyMap& hierarchy) {
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known_interfaces = std::set<FQName>();
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for (const auto& [intf, inherited_interfaces] : hierarchy) {
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known_interfaces->insert(intf);
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}
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}
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Result<void> IsKnownInterface(const std::string& instance) {
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FqInstance fqinstance;
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if (!fqinstance.setTo(instance)) {
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return Error() << "Unable to parse interface instance '" << instance << "'";
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}
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return IsKnownInterface(fqinstance.getFqName());
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}
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Result<void> IsKnownInterface(const FQName& intf) {
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if (!known_interfaces) {
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return Error() << "No known interfaces have been loaded.";
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}
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if (known_interfaces->count(intf) == 0) {
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return Error() << "Interface is not in the known set of hidl_interfaces: '" << intf.string()
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<< "'. Please ensure the interface is spelled correctly and built "
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<< "by a hidl_interface target.";
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}
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return {};
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}
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} // namespace init
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} // namespace android
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