cppcheck/lib/library.cpp

465 lines
21 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2014 Daniel Marjamäki and 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 "library.h"
#include "path.h"
#include "tinyxml2.h"
#include "tokenlist.h"
#include "mathlib.h"
#include "token.h"
#include <string>
#include <algorithm>
Library::Library() : allocid(0)
{
}
Library::Error Library::load(const char exename[], const char path[])
{
if (std::strchr(path,',') != nullptr) {
std::string p(path);
while (p.find(",") != std::string::npos) {
const std::string::size_type pos = p.find(",");
const Error &e = load(exename, p.substr(0,pos).c_str());
if (e.errorcode != OK)
return e;
p = p.substr(pos+1);
}
if (!p.empty())
return load(exename, p.c_str());
return Error();
}
// open file..
tinyxml2::XMLDocument doc;
tinyxml2::XMLError error = doc.LoadFile(path);
if (error == tinyxml2::XML_ERROR_FILE_NOT_FOUND) {
// failed to open file.. is there no extension?
std::string fullfilename(path);
if (Path::getFilenameExtension(fullfilename) == "") {
fullfilename += ".cfg";
error = doc.LoadFile(fullfilename.c_str());
}
if (error == tinyxml2::XML_ERROR_FILE_NOT_FOUND) {
// Try to locate the library configuration in the installation folder..
#ifdef CFGDIR
const std::string cfgfolder(CFGDIR);
#else
if (!exename)
return Error(FILE_NOT_FOUND);
const std::string cfgfolder(Path::fromNativeSeparators(Path::getPathFromFilename(exename)) + "cfg");
#endif
const char *sep = (!cfgfolder.empty() && cfgfolder[cfgfolder.size()-1U]=='/' ? "" : "/");
const std::string filename(cfgfolder + sep + fullfilename);
error = doc.LoadFile(filename.c_str());
}
}
return (error == tinyxml2::XML_NO_ERROR) ?
load(doc) :
Error(error == tinyxml2::XML_ERROR_FILE_NOT_FOUND ? FILE_NOT_FOUND : BAD_XML);
}
bool Library::loadxmldata(const char xmldata[], std::size_t len)
{
tinyxml2::XMLDocument doc;
return (tinyxml2::XML_NO_ERROR == doc.Parse(xmldata, len)) && (load(doc).errorcode == OK);
}
Library::Error Library::load(const tinyxml2::XMLDocument &doc)
{
const tinyxml2::XMLElement * const rootnode = doc.FirstChildElement();
if (rootnode == nullptr)
return Error(BAD_XML);
if (strcmp(rootnode->Name(),"def") != 0)
return Error(BAD_ELEMENT, rootnode->Name());
const char* format_string = rootnode->Attribute("format");
int format = 1;
if (format_string)
format = atoi(format_string);
if (format > 1)
return Error(UNSUPPORTED_FORMAT);
for (const tinyxml2::XMLElement *node = rootnode->FirstChildElement(); node; node = node->NextSiblingElement()) {
std::string nodename = node->Name();
if (nodename == "memory" || nodename == "resource") {
// get allocationId to use..
int allocationId = 0;
for (const tinyxml2::XMLElement *memorynode = node->FirstChildElement(); memorynode; memorynode = memorynode->NextSiblingElement()) {
if (strcmp(memorynode->Name(),"dealloc")==0) {
const std::map<std::string,int>::const_iterator it = _dealloc.find(memorynode->GetText());
if (it != _dealloc.end()) {
allocationId = it->second;
break;
}
}
}
if (allocationId == 0) {
if (strcmp(node->Name(), "memory")==0)
while (!ismemory(++allocid));
else
while (!isresource(++allocid));
allocationId = allocid;
}
// add alloc/dealloc/use functions..
for (const tinyxml2::XMLElement *memorynode = node->FirstChildElement(); memorynode; memorynode = memorynode->NextSiblingElement()) {
if (strcmp(memorynode->Name(),"alloc")==0) {
_alloc[memorynode->GetText()] = allocationId;
const char *init = memorynode->Attribute("init");
if (init && strcmp(init,"false")==0) {
returnuninitdata.insert(memorynode->GetText());
}
} else if (strcmp(memorynode->Name(),"dealloc")==0)
_dealloc[memorynode->GetText()] = allocationId;
else if (strcmp(memorynode->Name(),"use")==0)
use.insert(memorynode->GetText());
else
return Error(BAD_ELEMENT, memorynode->Name());
}
}
else if (nodename == "define") {
const char *name = node->Attribute("name");
if (name == nullptr)
return Error(MISSING_ATTRIBUTE, "name");
const char *value = node->Attribute("value");
if (value == nullptr)
return Error(MISSING_ATTRIBUTE, "value");
defines.push_back(std::string("#define ") +
name +
" " +
value +
"\n");
}
else if (nodename == "function") {
const char *name_char = node->Attribute("name");
if (name_char == nullptr)
return Error(MISSING_ATTRIBUTE, "name");
std::string name = name_char;
for (const tinyxml2::XMLElement *functionnode = node->FirstChildElement(); functionnode; functionnode = functionnode->NextSiblingElement()) {
std::string functionnodename = functionnode->Name();
if (functionnodename == "noreturn")
_noreturn[name] = (strcmp(functionnode->GetText(), "true") == 0);
else if (functionnodename == "pure")
functionpure.insert(name);
else if (functionnodename == "const") {
functionconst.insert(name);
functionpure.insert(name); // a constant function is pure
} else if (functionnodename == "leak-ignore")
leakignore.insert(name);
else if (functionnodename == "use-retval")
useretval.insert(name);
else if (functionnodename == "arg" && functionnode->Attribute("nr") != nullptr) {
const bool bAnyArg = strcmp(functionnode->Attribute("nr"),"any")==0;
const int nr = (bAnyArg) ? -1 : atoi(functionnode->Attribute("nr"));
bool notbool = false;
bool notnull = false;
bool notuninit = false;
bool formatstr = false;
bool strz = false;
std::string& valid = argumentChecks[name][nr].valid;
std::list<ArgumentChecks::MinSize>& minsizes = argumentChecks[name][nr].minsizes;
for (const tinyxml2::XMLElement *argnode = functionnode->FirstChildElement(); argnode; argnode = argnode->NextSiblingElement()) {
std::string argnodename = argnode->Name();
if (argnodename == "not-bool")
notbool = true;
else if (argnodename == "not-null")
notnull = true;
else if (argnodename == "not-uninit")
notuninit = true;
else if (argnodename == "formatstr")
formatstr = true;
else if (argnodename == "strz")
strz = true;
else if (argnodename == "valid") {
// Validate the validation expression
const char *p = argnode->GetText();
bool error = false;
bool range = false;
for (; *p; p++) {
if (std::isdigit(*p))
error |= (*(p+1) == '-');
else if (*p == ':')
error |= range;
else if (*p == '-')
error |= (!std::isdigit(*(p+1)));
else if (*p == ',')
range = false;
else
error = true;
range |= (*p == ':');
}
if (error)
return Error(BAD_ATTRIBUTE_VALUE, argnode->GetText());
// Set validation expression
valid = argnode->GetText();
}
else if (argnodename == "minsize") {
const char *typeattr = argnode->Attribute("type");
if (!typeattr)
return Error(MISSING_ATTRIBUTE, "type");
ArgumentChecks::MinSize::Type type;
if (strcmp(typeattr,"strlen")==0)
type = ArgumentChecks::MinSize::STRLEN;
else if (strcmp(typeattr,"argvalue")==0)
type = ArgumentChecks::MinSize::ARGVALUE;
else if (strcmp(typeattr,"sizeof")==0)
type = ArgumentChecks::MinSize::SIZEOF;
else if (strcmp(typeattr,"mul")==0)
type = ArgumentChecks::MinSize::MUL;
else
return Error(BAD_ATTRIBUTE_VALUE, typeattr);
const char *argattr = argnode->Attribute("arg");
if (!argattr)
return Error(MISSING_ATTRIBUTE, "arg");
if (strlen(argattr) != 1 || argattr[0]<'0' || argattr[0]>'9')
return Error(BAD_ATTRIBUTE_VALUE, argattr);
minsizes.push_back(ArgumentChecks::MinSize(type,argattr[0]-'0'));
if (type == ArgumentChecks::MinSize::MUL) {
const char *arg2attr = argnode->Attribute("arg2");
if (!arg2attr)
return Error(MISSING_ATTRIBUTE, "arg2");
if (strlen(arg2attr) != 1 || arg2attr[0]<'0' || arg2attr[0]>'9')
return Error(BAD_ATTRIBUTE_VALUE, arg2attr);
minsizes.back().arg2 = arg2attr[0] - '0';
}
}
else
return Error(BAD_ATTRIBUTE, argnode->Name());
}
argumentChecks[name][nr].notbool = notbool;
argumentChecks[name][nr].notnull = notnull;
argumentChecks[name][nr].notuninit = notuninit;
argumentChecks[name][nr].formatstr = formatstr;
argumentChecks[name][nr].strz = strz;
} else if (functionnodename == "ignorefunction") {
_ignorefunction.insert(name);
} else if (functionnodename == "formatstr") {
const tinyxml2::XMLAttribute* scan = functionnode->FindAttribute("scan");
const tinyxml2::XMLAttribute* secure = functionnode->FindAttribute("secure");
_formatstr[name] = std::make_pair(scan && scan->BoolValue(), secure && secure->BoolValue());
} else
return Error(BAD_ELEMENT, functionnode->Name());
}
}
else if (nodename == "reflection") {
for (const tinyxml2::XMLElement *reflectionnode = node->FirstChildElement(); reflectionnode; reflectionnode = reflectionnode->NextSiblingElement()) {
if (strcmp(reflectionnode->Name(), "call") != 0)
return Error(BAD_ELEMENT, reflectionnode->Name());
const char * const argString = reflectionnode->Attribute("arg");
if (!argString)
return Error(MISSING_ATTRIBUTE, "arg");
_reflection[reflectionnode->GetText()] = atoi(argString);
}
}
else if (nodename == "markup") {
const char * const extension = node->Attribute("ext");
if (!extension)
return Error(MISSING_ATTRIBUTE, "ext");
_markupExtensions.insert(extension);
const char * const reporterrors = node->Attribute("reporterrors");
_reporterrors[extension] = (reporterrors && strcmp(reporterrors, "true") == 0);
const char * const aftercode = node->Attribute("aftercode");
_processAfterCode[extension] = (aftercode && strcmp(aftercode, "true") == 0);
for (const tinyxml2::XMLElement *markupnode = node->FirstChildElement(); markupnode; markupnode = markupnode->NextSiblingElement()) {
std::string markupnodename = markupnode->Name();
if (markupnodename == "keywords") {
for (const tinyxml2::XMLElement *librarynode = markupnode->FirstChildElement(); librarynode; librarynode = librarynode->NextSiblingElement()) {
if (strcmp(librarynode->Name(), "keyword") == 0) {
const char* nodeName = librarynode->Attribute("name");
if (nodeName == nullptr)
return Error(MISSING_ATTRIBUTE, "name");
_keywords[extension].insert(nodeName);
} else
return Error(BAD_ELEMENT, librarynode->Name());
}
}
else if (markupnodename == "exported") {
for (const tinyxml2::XMLElement *exporter = markupnode->FirstChildElement(); exporter; exporter = exporter->NextSiblingElement()) {
if (strcmp(exporter->Name(), "exporter") != 0)
return Error(BAD_ELEMENT, exporter->Name());
const char * const prefix = exporter->Attribute("prefix");
if (!prefix)
return Error(MISSING_ATTRIBUTE, "prefix");
for (const tinyxml2::XMLElement *e = exporter->FirstChildElement(); e; e = e->NextSiblingElement()) {
if (strcmp(e->Name(), "prefix") == 0)
_exporters[prefix].addPrefix(e->GetText());
else if (strcmp(e->Name(), "suffix") == 0)
_exporters[prefix].addSuffix(e->GetText());
else
return Error(BAD_ELEMENT, e->Name());
}
}
}
else if (markupnodename == "imported") {
for (const tinyxml2::XMLElement *librarynode = markupnode->FirstChildElement(); librarynode; librarynode = librarynode->NextSiblingElement()) {
if (strcmp(librarynode->Name(), "importer") == 0)
_importers[extension].insert(librarynode->GetText());
else
return Error(BAD_ELEMENT, librarynode->Name());
}
}
else if (markupnodename == "codeblocks") {
for (const tinyxml2::XMLElement *blocknode = markupnode->FirstChildElement(); blocknode; blocknode = blocknode->NextSiblingElement()) {
if (strcmp(blocknode->Name(), "block") == 0) {
const char * blockName = blocknode->Attribute("name");
if (blockName)
_executableblocks[extension].addBlock(blockName);
} else if (strcmp(blocknode->Name(), "structure") == 0) {
const char * start = blocknode->Attribute("start");
if (start)
_executableblocks[extension].setStart(start);
const char * end = blocknode->Attribute("end");
if (end)
_executableblocks[extension].setEnd(end);
const char * offset = blocknode->Attribute("offset");
if (offset)
_executableblocks[extension].setOffset(atoi(offset));
}
else
return Error(BAD_ELEMENT, blocknode->Name());
}
}
else
return Error(BAD_ELEMENT, markupnode->Name());
}
}
else if (nodename == "podtype") {
const char * const name = node->Attribute("name");
if (!name)
return Error(MISSING_ATTRIBUTE, "name");
PodType podType = {0};
const char * const size = node->Attribute("sizeof");
if (size)
podType.size = atoi(size);
const char * const sign = node->Attribute("sign");
if (sign)
podType.sign = *sign;
podtypes[name] = podType;
}
else
return Error(BAD_ELEMENT, node->Name());
}
return Error(OK);
}
bool Library::isargvalid(const std::string &functionName, int argnr, const MathLib::bigint argvalue) const
{
const ArgumentChecks *ac = getarg(functionName, argnr);
if (!ac || ac->valid.empty())
return true;
TokenList tokenList(0);
std::istringstream istr(ac->valid + ',');
tokenList.createTokens(istr,"");
for (Token *tok = tokenList.front(); tok; tok = tok->next()) {
if (Token::Match(tok,"- %num%")) {
tok->str("-" + tok->strAt(1));
tok->deleteNext();
}
}
for (const Token *tok = tokenList.front(); tok; tok = tok->next()) {
if (tok->isNumber() && argvalue == MathLib::toLongNumber(tok->str()))
return true;
if (Token::Match(tok, "%num% : %num%") && argvalue >= MathLib::toLongNumber(tok->str()) && argvalue <= MathLib::toLongNumber(tok->strAt(2)))
return true;
if (Token::Match(tok, "%num% : ,") && argvalue >= MathLib::toLongNumber(tok->str()))
return true;
if ((!tok->previous() || tok->previous()->str() == ",") && Token::Match(tok,": %num%") && argvalue <= MathLib::toLongNumber(tok->strAt(1)))
return true;
}
return false;
}
const Library::ArgumentChecks * Library::getarg(const std::string &functionName, int argnr) const
{
std::map<std::string, std::map<int, ArgumentChecks> >::const_iterator it1;
it1 = argumentChecks.find(functionName);
if (it1 == argumentChecks.end())
return nullptr;
const std::map<int,ArgumentChecks>::const_iterator it2 = it1->second.find(argnr);
if (it2 != it1->second.end())
return &it2->second;
const std::map<int,ArgumentChecks>::const_iterator it3 = it1->second.find(-1);
if (it3 != it1->second.end())
return &it3->second;
return nullptr;
}
bool Library::isScopeNoReturn(const Token *end, std::string *unknownFunc) const
{
if (unknownFunc)
unknownFunc->clear();
if (!Token::simpleMatch(end->tokAt(-2), ") ; }"))
return false;
const Token *funcname = end->linkAt(-2)->previous();
const Token *start = funcname;
if (funcname && Token::Match(funcname->tokAt(-3),"( * %var% )")) {
funcname = funcname->previous();
start = funcname->tokAt(-3);
} else if (funcname->isName()) {
while (Token::Match(start, "%var%|.|::"))
start = start->previous();
} else {
return false;
}
if (Token::Match(start,"[;{}]") && Token::Match(funcname, "%var% )| (")) {
if (funcname->str() == "exit")
return true;
if (!isnotnoreturn(funcname->str())) {
if (unknownFunc && !isnoreturn(funcname->str()))
*unknownFunc = funcname->str();
return true;
}
}
return false;
}