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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hidden_api.h"
#include <fstream>
#include <sstream>
#include "android-base/strings.h"
#include "dex/dex_file-inl.h"
namespace art {
HiddenApi::HiddenApi(const char* filename, const ApiListFilter& api_list_filter)
: api_list_filter_(api_list_filter) {
CHECK(filename != nullptr);
std::ifstream in(filename);
for (std::string str; std::getline(in, str);) {
std::vector<std::string> values = android::base::Split(str, ",");
const std::string& signature = values[0];
hiddenapi::ApiList membership;
bool success = hiddenapi::ApiList::FromNames(values.begin() + 1, values.end(), &membership);
CHECK(success) << "Unknown ApiList flag: " << str;
CHECK(membership.IsValid()) << "Invalid ApiList: " << membership;
AddSignatureToApiList(signature, membership);
size_t pos = signature.find("->");
if (pos != std::string::npos) {
// Add the class name.
AddSignatureToApiList(signature.substr(0, pos), membership);
pos = signature.find('(');
if (pos != std::string::npos) {
// Add the class->method name (so stripping the signature).
AddSignatureToApiList(signature.substr(0, pos), membership);
}
pos = signature.find(':');
if (pos != std::string::npos) {
// Add the class->field name (so stripping the type).
AddSignatureToApiList(signature.substr(0, pos), membership);
}
}
}
}
void HiddenApi::AddSignatureToApiList(const std::string& signature, hiddenapi::ApiList membership) {
auto it = api_list_.find(signature);
if (it == api_list_.end()) {
// Does not exist yet. Add it to list.
api_list_.emplace(signature, membership);
} else if (membership.GetMaxAllowedSdkVersion() < it->second.GetMaxAllowedSdkVersion()) {
// Already exist but `membership` is more restrictive.
it->second = membership;
} else {
// Already exists and `membership` is equally or less restrictive.
}
}
std::string HiddenApi::GetApiMethodName(const DexFile& dex_file, uint32_t method_index) {
std::stringstream ss;
const dex::MethodId& method_id = dex_file.GetMethodId(method_index);
ss << dex_file.StringByTypeIdx(method_id.class_idx_)
<< "->"
<< dex_file.GetMethodName(method_id)
<< dex_file.GetMethodSignature(method_id).ToString();
return ss.str();
}
std::string HiddenApi::GetApiFieldName(const DexFile& dex_file, uint32_t field_index) {
std::stringstream ss;
const dex::FieldId& field_id = dex_file.GetFieldId(field_index);
ss << dex_file.StringByTypeIdx(field_id.class_idx_)
<< "->"
<< dex_file.GetFieldName(field_id)
<< ":"
<< dex_file.GetFieldTypeDescriptor(field_id);
return ss.str();
}
} // namespace art
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