411 lines
18 KiB
C++
411 lines
18 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2014 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "library.h"
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#include "path.h"
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#include "tinyxml2.h"
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#include "tokenlist.h"
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#include "mathlib.h"
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#include "token.h"
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#include <string>
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#include <algorithm>
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Library::Library() : allocid(0)
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{
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}
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Library::Error Library::load(const char exename[], const char path[])
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{
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if (std::strchr(path,',') != nullptr) {
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std::string p(path);
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while (p.find(",") != std::string::npos) {
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const std::string::size_type pos = p.find(",");
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const Error &e = load(exename, p.substr(0,pos).c_str());
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if (e.errorcode != OK)
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return e;
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p = p.substr(pos+1);
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}
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if (!p.empty())
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return load(exename, p.c_str());
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return Error();
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}
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// open file..
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tinyxml2::XMLDocument doc;
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tinyxml2::XMLError error = doc.LoadFile(path);
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if (error == tinyxml2::XML_ERROR_FILE_NOT_FOUND) {
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// failed to open file.. is there no extension?
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std::string fullfilename(path);
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if (Path::getFilenameExtension(fullfilename) == "") {
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fullfilename += ".cfg";
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error = doc.LoadFile(fullfilename.c_str());
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}
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if (error == tinyxml2::XML_ERROR_FILE_NOT_FOUND) {
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// Try to locate the library configuration in the installation folder..
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#ifdef CFGDIR
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const std::string cfgfolder(CFGDIR);
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#else
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if (!exename)
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return Error(FILE_NOT_FOUND);
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const std::string cfgfolder(Path::fromNativeSeparators(Path::getPathFromFilename(exename)) + "cfg");
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#endif
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const char *sep = (!cfgfolder.empty() && cfgfolder[cfgfolder.size()-1U]=='/' ? "" : "/");
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const std::string filename(cfgfolder + sep + fullfilename);
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error = doc.LoadFile(filename.c_str());
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}
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}
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return (error == tinyxml2::XML_NO_ERROR) ? load(doc) : Error(BAD_XML);
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}
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bool Library::loadxmldata(const char xmldata[], std::size_t len)
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{
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tinyxml2::XMLDocument doc;
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return (tinyxml2::XML_NO_ERROR == doc.Parse(xmldata, len)) && (load(doc).errorcode == OK);
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}
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Library::Error Library::load(const tinyxml2::XMLDocument &doc)
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{
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const tinyxml2::XMLElement * const rootnode = doc.FirstChildElement();
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if (rootnode == nullptr)
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return Error(BAD_XML);
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if (strcmp(rootnode->Name(),"def") != 0)
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return Error(BAD_ELEMENT, rootnode->Name());
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for (const tinyxml2::XMLElement *node = rootnode->FirstChildElement(); node; node = node->NextSiblingElement()) {
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if (strcmp(node->Name(),"memory")==0 || strcmp(node->Name(),"resource")==0) {
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// get allocationId to use..
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int allocationId = 0;
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for (const tinyxml2::XMLElement *memorynode = node->FirstChildElement(); memorynode; memorynode = memorynode->NextSiblingElement()) {
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if (strcmp(memorynode->Name(),"dealloc")==0) {
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const std::map<std::string,int>::const_iterator it = _dealloc.find(memorynode->GetText());
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if (it != _dealloc.end()) {
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allocationId = it->second;
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break;
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}
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}
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}
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if (allocationId == 0) {
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if (strcmp(node->Name(), "memory")==0)
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while (!ismemory(++allocid));
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else
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while (!isresource(++allocid));
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allocationId = allocid;
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}
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// add alloc/dealloc/use functions..
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for (const tinyxml2::XMLElement *memorynode = node->FirstChildElement(); memorynode; memorynode = memorynode->NextSiblingElement()) {
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if (strcmp(memorynode->Name(),"alloc")==0) {
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_alloc[memorynode->GetText()] = allocationId;
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const char *init = memorynode->Attribute("init");
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if (init && strcmp(init,"false")==0) {
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returnuninitdata.insert(memorynode->GetText());
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}
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} else if (strcmp(memorynode->Name(),"dealloc")==0)
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_dealloc[memorynode->GetText()] = allocationId;
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else if (strcmp(memorynode->Name(),"use")==0)
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use.insert(memorynode->GetText());
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else
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return Error(BAD_ELEMENT, memorynode->Name());
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}
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}
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else if (strcmp(node->Name(),"define")==0) {
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const char *name = node->Attribute("name");
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if (name == nullptr)
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return Error(MISSING_ATTRIBUTE, "name");
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const char *value = node->Attribute("value");
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if (value == nullptr)
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return Error(MISSING_ATTRIBUTE, "value");
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defines.push_back(std::string("#define ") +
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name +
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" " +
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value +
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"\n");
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}
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else if (strcmp(node->Name(),"function")==0) {
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const char *name = node->Attribute("name");
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if (name == nullptr)
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return Error(MISSING_ATTRIBUTE, "name");
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for (const tinyxml2::XMLElement *functionnode = node->FirstChildElement(); functionnode; functionnode = functionnode->NextSiblingElement()) {
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if (strcmp(functionnode->Name(),"noreturn")==0)
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_noreturn[name] = (strcmp(functionnode->GetText(), "true") == 0);
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else if (strcmp(functionnode->Name(), "pure") == 0)
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functionpure.insert(name);
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else if (strcmp(functionnode->Name(), "const") == 0) {
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functionconst.insert(name);
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functionpure.insert(name); // a constant function is pure
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} else if (strcmp(functionnode->Name(),"leak-ignore")==0)
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leakignore.insert(name);
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else if (strcmp(functionnode->Name(), "arg") == 0 && functionnode->Attribute("nr") != nullptr) {
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const bool bAnyArg = strcmp(functionnode->Attribute("nr"),"any")==0;
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const int nr = (bAnyArg) ? -1 : atoi(functionnode->Attribute("nr"));
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bool notbool = false;
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bool notnull = false;
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bool notuninit = false;
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bool formatstr = false;
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bool strz = false;
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std::string valid;
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for (const tinyxml2::XMLElement *argnode = functionnode->FirstChildElement(); argnode; argnode = argnode->NextSiblingElement()) {
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if (strcmp(argnode->Name(), "not-bool") == 0)
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notbool = true;
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else if (strcmp(argnode->Name(), "not-null") == 0)
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notnull = true;
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else if (strcmp(argnode->Name(), "not-uninit") == 0)
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notuninit = true;
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else if (strcmp(argnode->Name(), "formatstr") == 0)
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formatstr = true;
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else if (strcmp(argnode->Name(), "strz") == 0)
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strz = true;
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else if (strcmp(argnode->Name(), "valid") == 0) {
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// Validate the validation expression
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const char *p = argnode->GetText();
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bool error = false;
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bool range = false;
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for (; *p; p++) {
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if (std::isdigit(*p))
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error |= (*(p+1) == '-');
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else if (*p == ':')
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error |= range;
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else if (*p == '-')
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error |= (!std::isdigit(*(p+1)));
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else if (*p == ',')
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range = false;
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else
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error = true;
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range |= (*p == ':');
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}
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if (error)
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return Error(BAD_ATTRIBUTE_VALUE, argnode->GetText());
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// Set validation expression
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valid = argnode->GetText();
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}
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else
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return Error(BAD_ATTRIBUTE, argnode->Name());
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}
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argumentChecks[name][nr].notbool = notbool;
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argumentChecks[name][nr].notnull = notnull;
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argumentChecks[name][nr].notuninit = notuninit;
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argumentChecks[name][nr].formatstr = formatstr;
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argumentChecks[name][nr].strz = strz;
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argumentChecks[name][nr].valid = valid;
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} else if (strcmp(functionnode->Name(), "ignorefunction") == 0) {
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_ignorefunction.insert(name);
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} else if (strcmp(functionnode->Name(), "formatstr") == 0) {
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const tinyxml2::XMLAttribute* scan = functionnode->FindAttribute("scan");
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const tinyxml2::XMLAttribute* secure = functionnode->FindAttribute("secure");
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_formatstr[name] = std::make_pair(scan && scan->BoolValue(), secure && secure->BoolValue());
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} else
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return Error(BAD_ELEMENT, functionnode->Name());
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}
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}
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else if (strcmp(node->Name(), "reflection") == 0) {
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for (const tinyxml2::XMLElement *reflectionnode = node->FirstChildElement(); reflectionnode; reflectionnode = reflectionnode->NextSiblingElement()) {
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if (strcmp(reflectionnode->Name(), "call") != 0)
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return Error(BAD_ELEMENT, reflectionnode->Name());
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const char * const argString = reflectionnode->Attribute("arg");
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if (!argString)
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return Error(MISSING_ATTRIBUTE, "arg");
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_reflection[reflectionnode->GetText()] = atoi(argString);
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}
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}
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else if (strcmp(node->Name(), "markup") == 0) {
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const char * const extension = node->Attribute("ext");
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if (!extension)
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return Error(MISSING_ATTRIBUTE, "ext");
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_markupExtensions.insert(extension);
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const char * const reporterrors = node->Attribute("reporterrors");
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_reporterrors[extension] = (reporterrors && strcmp(reporterrors, "true") == 0);
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const char * const aftercode = node->Attribute("aftercode");
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_processAfterCode[extension] = (aftercode && strcmp(aftercode, "true") == 0);
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for (const tinyxml2::XMLElement *markupnode = node->FirstChildElement(); markupnode; markupnode = markupnode->NextSiblingElement()) {
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if (strcmp(markupnode->Name(), "keywords") == 0) {
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for (const tinyxml2::XMLElement *librarynode = markupnode->FirstChildElement(); librarynode; librarynode = librarynode->NextSiblingElement()) {
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if (strcmp(librarynode->Name(), "keyword") == 0)
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_keywords[extension].insert(librarynode->Attribute("name"));
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else
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return Error(BAD_ELEMENT, librarynode->Name());
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}
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}
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else if (strcmp(markupnode->Name(), "exported") == 0) {
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for (const tinyxml2::XMLElement *exporter = markupnode->FirstChildElement(); exporter; exporter = exporter->NextSiblingElement()) {
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if (strcmp(exporter->Name(), "exporter") != 0)
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return Error(BAD_ELEMENT, exporter->Name());
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const char * const prefix = exporter->Attribute("prefix");
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if (!prefix)
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return Error(MISSING_ATTRIBUTE, "prefix");
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for (const tinyxml2::XMLElement *e = exporter->FirstChildElement(); e; e = e->NextSiblingElement()) {
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if (strcmp(e->Name(), "prefix") == 0)
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_exporters[prefix].addPrefix(e->GetText());
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else if (strcmp(e->Name(), "suffix") == 0)
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_exporters[prefix].addSuffix(e->GetText());
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else
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return Error(BAD_ELEMENT, e->Name());
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}
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}
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}
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else if (strcmp(markupnode->Name(), "imported") == 0) {
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for (const tinyxml2::XMLElement *librarynode = markupnode->FirstChildElement(); librarynode; librarynode = librarynode->NextSiblingElement()) {
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if (strcmp(librarynode->Name(), "importer") == 0)
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_importers[extension].insert(librarynode->GetText());
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else
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return Error(BAD_ELEMENT, librarynode->Name());
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}
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}
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else if (strcmp(markupnode->Name(), "codeblocks") == 0) {
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for (const tinyxml2::XMLElement *blocknode = markupnode->FirstChildElement(); blocknode; blocknode = blocknode->NextSiblingElement()) {
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if (strcmp(blocknode->Name(), "block") == 0) {
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const char * name = blocknode->Attribute("name");
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if (name)
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_executableblocks[extension].addBlock(blocknode->Attribute("name"));
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} else if (strcmp(blocknode->Name(), "structure") == 0) {
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const char * start = blocknode->Attribute("start");
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if (start)
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_executableblocks[extension].setStart(start);
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const char * end = blocknode->Attribute("end");
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if (end)
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_executableblocks[extension].setEnd(end);
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const char * offset = blocknode->Attribute("offset");
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if (offset)
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_executableblocks[extension].setOffset(atoi(offset));
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}
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else
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return Error(BAD_ELEMENT, blocknode->Name());
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}
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}
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else
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return Error(BAD_ELEMENT, markupnode->Name());
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}
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}
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else if (strcmp(node->Name(), "podtype") == 0) {
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const char * const name = node->Attribute("name");
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if (!name)
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return Error(MISSING_ATTRIBUTE, "name");
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PodType podType = {0};
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const char * const size = node->Attribute("sizeof");
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if (size)
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podType.size = atoi(size);
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const char * const sign = node->Attribute("sign");
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if (sign)
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podType.sign = *sign;
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podtypes[name] = podType;
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}
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else
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return Error(BAD_ELEMENT, node->Name());
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}
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return Error(OK);
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}
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bool Library::isargvalid(const std::string &functionName, int argnr, const MathLib::bigint argvalue) const
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{
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const ArgumentChecks *ac = getarg(functionName, argnr);
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if (!ac || ac->valid.empty())
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return true;
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TokenList tokenList(0);
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std::istringstream istr(ac->valid + ',');
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tokenList.createTokens(istr,"");
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for (Token *tok = tokenList.front(); tok; tok = tok->next()) {
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if (Token::Match(tok,"- %num%")) {
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tok->str("-" + tok->strAt(1));
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tok->deleteNext();
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}
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}
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for (const Token *tok = tokenList.front(); tok; tok = tok->next()) {
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if (tok->isNumber() && argvalue == MathLib::toLongNumber(tok->str()))
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return true;
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if (Token::Match(tok, "%num% : %num%") && argvalue >= MathLib::toLongNumber(tok->str()) && argvalue <= MathLib::toLongNumber(tok->strAt(2)))
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return true;
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if (Token::Match(tok, "%num% : ,") && argvalue >= MathLib::toLongNumber(tok->str()))
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return true;
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if ((!tok->previous() || tok->previous()->str() == ",") && Token::Match(tok,": %num%") && argvalue <= MathLib::toLongNumber(tok->strAt(1)))
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return true;
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}
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return false;
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}
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const Library::ArgumentChecks * Library::getarg(const std::string &functionName, int argnr) const
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{
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std::map<std::string, std::map<int, ArgumentChecks> >::const_iterator it1;
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it1 = argumentChecks.find(functionName);
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if (it1 == argumentChecks.end())
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return nullptr;
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const std::map<int,ArgumentChecks>::const_iterator it2 = it1->second.find(argnr);
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if (it2 != it1->second.end())
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return &it2->second;
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const std::map<int,ArgumentChecks>::const_iterator it3 = it1->second.find(-1);
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if (it3 != it1->second.end())
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return &it3->second;
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return nullptr;
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}
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bool Library::isScopeNoReturn(const Token *end, std::string *unknownFunc) const
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{
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if (unknownFunc)
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unknownFunc->clear();
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if (!Token::simpleMatch(end->tokAt(-2), ") ; }"))
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return false;
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const Token *funcname = end->linkAt(-2)->previous();
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const Token *start = funcname;
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if (funcname && Token::Match(funcname->tokAt(-3),"( * %var% )")) {
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funcname = funcname->previous();
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start = funcname->tokAt(-3);
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} else if (funcname->isName()) {
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while (Token::Match(start, "%var%|.|::"))
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start = start->previous();
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} else {
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return false;
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}
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if (Token::Match(start,"[;{}]") && Token::Match(funcname, "%var% )| (")) {
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if (funcname->str() == "exit")
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return true;
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if (!isnotnoreturn(funcname->str())) {
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if (unknownFunc && !isnoreturn(funcname->str()))
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*unknownFunc = funcname->str();
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return true;
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}
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}
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return false;
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}
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