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/*
* Copyright (C) 2020 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 "read_symbol_map.h"
#include <errno.h>
#include <stdlib.h>
#include <algorithm>
#include <optional>
#include <string>
#include <string_view>
#include <vector>
#include "dso.h"
namespace simpleperf {
namespace {
std::optional<std::string_view> ConsumeWord(std::string_view& content_ref) {
size_t begin = content_ref.find_first_not_of(" \t");
if (begin == content_ref.npos) {
return {};
}
size_t end = content_ref.find_first_of(" \t", begin + 1);
if (end == content_ref.npos) {
end = content_ref.size();
}
auto res = content_ref.substr(begin, end - begin);
content_ref.remove_prefix(end);
return res;
}
std::optional<uint64_t> ConsumeUInt(std::string_view& content_ref) {
auto word = ConsumeWord(content_ref);
if (!word) {
return {};
}
errno = 0;
const char* start = word.value().data();
char* stop;
auto res = strtoull(start, &stop, 0);
if (errno != 0 || stop - start != word.value().size()) {
return {};
}
return res;
}
void ReadSymbol(std::string_view content, std::vector<Symbol>* symbols) {
auto addr = ConsumeUInt(content);
if (!addr) {
return;
}
auto size = ConsumeUInt(content);
if (!size) {
return;
}
// Interpret the rest of the line as the symbol name, after stripping leading
// and trailing spaces.
size_t symbol_begin = content.find_first_not_of(" \t");
if (symbol_begin == content.npos) {
return;
}
size_t symbol_end = content.find_last_not_of(" \t") + 1;
auto name = content.substr(symbol_begin, symbol_end - symbol_begin);
symbols->emplace_back(name, addr.value(), size.value());
}
} // namespace
std::vector<Symbol> ReadSymbolMapFromString(const std::string& content) {
std::vector<Symbol> symbols;
for (size_t begin = 0;;) {
size_t end = content.find_first_of("\n\r", begin);
if (end == content.npos) {
ReadSymbol({content.c_str() + begin, content.size() - begin}, &symbols);
std::sort(symbols.begin(), symbols.end(), Symbol::CompareValueByAddr);
return symbols;
}
ReadSymbol({content.c_str() + begin, end - begin}, &symbols);
begin = end + 1;
}
}
} // namespace simpleperf
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