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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2024 Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "summaries.h"
#include "analyzerinfo.h"
#include "settings.h"
#include "symboldatabase.h"
#include "token.h"
#include "tokenize.h"
#include "tokenlist.h"
#include <algorithm>
#include <fstream>
#include <map>
#include <sstream>
#include <utility>
#include <vector>
std::string Summaries::create(const Tokenizer &tokenizer, const std::string &cfg)
{
const SymbolDatabase *symbolDatabase = tokenizer.getSymbolDatabase();
const Settings &settings = tokenizer.getSettings();
std::ostringstream ostr;
for (const Scope *scope : symbolDatabase->functionScopes) {
const Function *f = scope->function;
if (!f)
continue;
// Summarize function
std::set<std::string> noreturn;
std::set<std::string> globalVars;
std::set<std::string> calledFunctions;
for (const Token* tok = scope->bodyStart; tok != scope->bodyEnd; tok = tok->next()) {
if (tok->variable() && tok->variable()->isGlobal())
globalVars.insert(tok->variable()->name());
if (Token::Match(tok, "%name% (") && !Token::simpleMatch(tok->linkAt(1), ") {")) {
calledFunctions.insert(tok->str());
if (Token::simpleMatch(tok->linkAt(1), ") ; }"))
noreturn.insert(tok->str());
}
}
// Write summary for function
auto join = [](const std::set<std::string> &data) -> std::string {
std::string ret;
const char *sep = "";
for (const std::string &d: data)
{
ret += sep + d;
sep = ",";
}
return ret;
};
ostr << f->name();
if (!globalVars.empty())
ostr << " global:[" << join(globalVars) << "]";
if (!calledFunctions.empty())
ostr << " call:[" << join(calledFunctions) << "]";
if (!noreturn.empty())
ostr << " noreturn:[" << join(noreturn) << "]";
ostr << std::endl;
}
if (!settings.buildDir.empty()) {
std::string filename = AnalyzerInformation::getAnalyzerInfoFile(settings.buildDir, tokenizer.list.getSourceFilePath(), cfg);
const std::string::size_type pos = filename.rfind(".a");
if (pos != std::string::npos) {
filename[pos+1] = 's';
std::ofstream fout(filename);
fout << ostr.str();
}
}
return ostr.str();
}
static std::vector<std::string> getSummaryFiles(const std::string &filename)
{
std::vector<std::string> ret;
std::ifstream fin(filename);
if (!fin.is_open())
return ret;
std::string line;
while (std::getline(fin, line)) {
const std::string::size_type dotA = line.find(".a");
const std::string::size_type colon = line.find(':');
if (colon > line.size() || dotA > colon)
continue;
std::string f = line.substr(0,colon);
f[dotA + 1] = 's';
ret.push_back(std::move(f));
}
return ret;
}
static std::vector<std::string> getSummaryData(const std::string &line, const std::string &data)
{
std::vector<std::string> ret;
const std::string::size_type start = line.find(" " + data + ":[");
if (start == std::string::npos)
return ret;
const std::string::size_type end = line.find(']', start);
if (end >= line.size())
return ret;
std::string::size_type pos1 = start + 3 + data.size();
while (pos1 < end) {
const std::string::size_type pos2 = line.find_first_of(",]",pos1);
ret.push_back(line.substr(pos1, pos2-pos1-1));
pos1 = pos2 + 1;
}
return ret;
}
static void removeFunctionCalls(const std::string& calledFunction,
std::map<std::string, std::vector<std::string>> &functionCalledBy,
std::map<std::string, std::vector<std::string>> &functionCalls,
std::vector<std::string> &add)
{
std::vector<std::string> calledBy = functionCalledBy[calledFunction];
functionCalledBy.erase(calledFunction);
for (const std::string &c: calledBy) {
std::vector<std::string> &calls = functionCalls[c];
calls.erase(std::remove(calls.begin(), calls.end(), calledFunction), calls.end());
if (calls.empty()) {
add.push_back(calledFunction);
removeFunctionCalls(c, functionCalledBy, functionCalls, add);
}
}
}
void Summaries::loadReturn(const std::string &buildDir, std::set<std::string> &summaryReturn)
{
if (buildDir.empty())
return;
std::vector<std::string> return1;
std::map<std::string, std::vector<std::string>> functionCalls;
std::map<std::string, std::vector<std::string>> functionCalledBy;
// extract "functionNoreturn" and "functionCalledBy" from summaries
std::vector<std::string> summaryFiles = getSummaryFiles(buildDir + "/files.txt");
for (const std::string &filename: summaryFiles) {
std::ifstream fin(buildDir + '/' + filename);
if (!fin.is_open())
continue;
std::string line;
while (std::getline(fin, line)) {
// Get function name
constexpr std::string::size_type pos1 = 0;
const std::string::size_type pos2 = line.find(' ', pos1);
const std::string functionName = (pos2 == std::string::npos) ? line : line.substr(0, pos2);
std::vector<std::string> call = getSummaryData(line, "call");
functionCalls[functionName] = call;
if (call.empty())
return1.push_back(functionName);
else {
for (const std::string &c: call) {
functionCalledBy[c].push_back(functionName);
}
}
}
}
summaryReturn.insert(return1.cbegin(), return1.cend());
// recursively set "summaryNoreturn"
for (const std::string &f: return1) {
std::vector<std::string> return2;
removeFunctionCalls(f, functionCalledBy, functionCalls, return2);
summaryReturn.insert(return2.cbegin(), return2.cend());
}
}
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