205 lines
8.3 KiB
C++
205 lines
8.3 KiB
C++
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#include <iostream>
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#include <cstring>
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#include <string>
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#include <sstream>
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#include <vector>
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#include "tinyxml2.h"
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static void testfunction(const tinyxml2::XMLElement *node, const std::string &functionName);
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static std::vector<std::string> splitString(const char *str, char delim)
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{
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std::vector<std::string> ret;
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while (const char *p = std::strchr(str,delim)) {
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ret.push_back(std::string(str, p-str));
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str = p + 1;
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}
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ret.push_back(str);
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return ret;
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}
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static std::string replaceCharInString(std::string s, char from, char to)
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{
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for (int i = 0; i < s.size(); ++i) {
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if (s[i] == from)
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s[i] = to;
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}
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return s;
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}
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int main(int argc, char **argv)
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{
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if (argc != 2 || !std::strstr(argv[1], ".cfg")) {
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std::cerr << "no cfg file\n";
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return 1;
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}
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const char *cfgfile = argv[1];
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tinyxml2::XMLDocument doc;
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if (tinyxml2::XML_SUCCESS != doc.LoadFile(cfgfile)) {
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std::cerr << "failed to load cfg file\n";
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return 1;
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}
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std::string testfile(cfgfile);
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if (testfile.find('/') != std::string::npos)
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testfile = testfile.substr(testfile.rfind('/')+1);
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testfile = "generated-cfg-tests-" + testfile.substr(0,testfile.find('.')) + ".cpp";
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std::cout << "// auto generated tests from " << cfgfile << std::endl;
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std::cout << "//" << std::endl;
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std::cout << "// Generated by command:" << std::endl;
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std::cout << "// " << argv[0] << ' ' << cfgfile << " > " << testfile << std::endl;
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std::cout << "//" << std::endl;
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std::cout << "// Recommended cppcheck command line:" << std::endl;
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std::cout << "// $ cppcheck --enable=warning,information --inline-suppr --platform=unix64 " << testfile << std::endl;
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std::cout << "// => 'unmatched suppression' warnings are false negatives." << std::endl;
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std::cout << "//" << std::endl << std::endl;
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const tinyxml2::XMLElement * const rootnode = doc.FirstChildElement();
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for (const tinyxml2::XMLElement *node = rootnode->FirstChildElement(); node; node = node->NextSiblingElement()) {
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const std::string nodename = node->Name();
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if (nodename == "memory" || nodename == "resource") {
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//testalloc(node);
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} else if (nodename == "function") {
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for (const std::string &name : splitString(node->Attribute("name"), ','))
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testfunction(node, name);
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}
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}
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return 0;
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}
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static std::string functionCall(const std::string &functionName, bool useretval, int argNr, int numberOfArgs, const char badArg[])
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{
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std::ostringstream ostr;
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if (useretval)
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ostr << "result = ";
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ostr << functionName << '(';
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for (int i = 1; i <= numberOfArgs; ++i) {
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if (i > 1)
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ostr << ", ";
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if (i == argNr)
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ostr << badArg;
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else
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ostr << "arg" << i;
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}
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ostr << ')';
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return ostr.str();
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}
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static std::string testFunctionArg(const std::string &functionName, bool useretval, const char type[], int argNr, int numberOfArgs, const char code[], const char suppress[], const char badArg[])
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{
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std::ostringstream ostr;
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ostr << "void test__" << replaceCharInString(functionName,':','_') << "__arg" << argNr << "__" << type << "() {" << std::endl;
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if (*code)
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ostr << " " << code << std::endl;
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ostr << " // cppcheck-suppress " << suppress << std::endl;
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ostr << " " << functionCall(functionName, useretval, argNr, numberOfArgs, badArg) << ';' << std::endl;
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ostr << '}';
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return ostr.str();
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}
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static void testfunction(const tinyxml2::XMLElement *node, const std::string &functionName)
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{
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// How many args does this function take?
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int numberOfArgs = 0;
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for (const tinyxml2::XMLElement *child = node->FirstChildElement(); child; child = child->NextSiblingElement()) {
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if (std::strcmp(child->Name(), "arg") == 0) {
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const char *nr = child->Attribute("nr");
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if (nr && std::isdigit(*nr) && std::atoi(nr) > numberOfArgs)
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numberOfArgs = std::atoi(nr);
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}
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}
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bool noreturn = false;
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bool useretval = false;
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bool pure = false;
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//bool constant = false;
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bool leakignore = false;
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for (const tinyxml2::XMLElement *child = node->FirstChildElement(); child; child = child->NextSiblingElement()) {
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if (std::strcmp(child->Name(), "noreturn") == 0)
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noreturn = true;
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else if (std::strcmp(child->Name(), "use-retval") == 0)
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useretval = true;
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else if (std::strcmp(child->Name(), "pure") == 0)
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pure = true;
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//else if (std::strcmp(child->Name(), "const") == 0)
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// constant = true;
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else if (std::strcmp(child->Name(), "leak-ignore") == 0)
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leakignore = true;
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}
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if (noreturn) {
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std::cout << "void test__" << replaceCharInString(functionName,':','_') << "__noreturn() {" << std::endl;
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std::cout << " int x = 1;" << std::endl;
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std::cout << " if (cond) { x=100; " << functionCall(functionName, useretval, -1, numberOfArgs, "") << "; }" << std::endl;
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std::cout << " // cppcheck-suppress shiftTooManyBits" << std::endl;
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std::cout << " x = 1 << x;" << std::endl;
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std::cout << "}" << std::endl << std::endl;
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}
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if (useretval) {
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std::cout << "void test__" << replaceCharInString(functionName,':','_') << "__useretval() {" << std::endl;
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std::cout << " // cppcheck-suppress ignoredReturnValue" << std::endl;
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std::cout << " " << functionCall(functionName, false, -1, numberOfArgs, "") << ';' << std::endl;
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std::cout << "}" << std::endl << std::endl;
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}
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if (pure) {
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std::cout << "void test__" << replaceCharInString(functionName,':','_') << "__pure(";
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for (int i = 1; i <= numberOfArgs; ++i)
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std::cout << (i>1?",":"") << "int arg" << i;
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std::cout << ") {" << std::endl;
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std::cout << " // cppcheck-suppress incorrectLogicOperator" << std::endl;
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std::cout << " if ((" << functionCall(functionName, false, -1, numberOfArgs, "") << " > 10) || (";
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std::cout << functionCall(functionName, false, -1, numberOfArgs, "") << " < 100)) {}" << std::endl;
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std::cout << "}" << std::endl << std::endl;
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}
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if (leakignore && functionName.find("::") == std::string::npos) {
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std::cout << "void test__" << replaceCharInString(functionName,':','_') << "__leakignore() {" << std::endl;
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std::cout << " char *p = malloc(10); *p=0;" << std::endl;
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std::cout << " " << functionCall(functionName, useretval, 1, numberOfArgs, "p") << ';' << std::endl;
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std::cout << " // cppcheck-suppress memleak" << std::endl;
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std::cout << "}" << std::endl << std::endl;
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}
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// Generate tests for args
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for (int argNr = 1; argNr <= numberOfArgs; ++argNr) {
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for (const tinyxml2::XMLElement *child = node->FirstChildElement(); child; child = child->NextSiblingElement()) {
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if (std::strcmp(child->Name(), "arg") != 0)
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continue;
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const char *nrAttr = child->Attribute("nr");
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if (!nrAttr || std::atoi(nrAttr) != argNr)
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continue;
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bool notbool = false;
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bool notuninit = false;
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bool notnull = false;
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for (const tinyxml2::XMLElement *argCheck = child->FirstChildElement(); argCheck; argCheck = argCheck->NextSiblingElement()) {
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if (std::strcmp(argCheck->Name(), "not-bool") == 0)
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notbool = true;
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else if (std::strcmp(argCheck->Name(), "not-null") == 0)
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notnull = true;
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else if (std::strcmp(argCheck->Name(), "not-uninit") == 0)
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notuninit = true;
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}
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if (notbool) {
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std::cout << testFunctionArg(functionName, useretval, "notbool", argNr, numberOfArgs, "", "invalidFunctionArgBool", "!x") << std::endl << std::endl;
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}
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if (notnull) {
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std::cout << testFunctionArg(functionName, useretval, "notnull", argNr, numberOfArgs, "", "nullPointer", "NULL") << std::endl << std::endl;
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}
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if (notuninit) {
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const char *code = notnull ? "int x[10];" : "int x;";
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std::cout << testFunctionArg(functionName, useretval, "notuninit", argNr, numberOfArgs, code, "uninitvar", "x") << std::endl << std::endl;
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}
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}
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}
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}
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