530 lines
18 KiB
C++
530 lines
18 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2018 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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//---------------------------------------------------------------------------
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#ifndef libraryH
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#define libraryH
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//---------------------------------------------------------------------------
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#include "config.h"
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#include "errorlogger.h"
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#include "mathlib.h"
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#include "standards.h"
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#include <cstddef>
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#include <map>
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#include <set>
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#include <string>
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#include <utility>
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#include <vector>
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class Token;
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namespace tinyxml2 {
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class XMLDocument;
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class XMLElement;
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}
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/// @addtogroup Core
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/// @{
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/**
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* @brief Library definitions handling
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*/
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class CPPCHECKLIB Library {
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friend class TestSymbolDatabase; // For testing only
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public:
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Library();
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enum ErrorCode { OK, FILE_NOT_FOUND, BAD_XML, UNKNOWN_ELEMENT, MISSING_ATTRIBUTE, BAD_ATTRIBUTE_VALUE, UNSUPPORTED_FORMAT, DUPLICATE_PLATFORM_TYPE, PLATFORM_TYPE_REDEFINED };
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class Error {
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public:
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Error() : errorcode(OK) {}
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explicit Error(ErrorCode e) : errorcode(e) {}
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template<typename T>
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Error(ErrorCode e, T&& r) : errorcode(e), reason(r) {}
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ErrorCode errorcode;
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std::string reason;
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};
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Error load(const char exename [], const char path []);
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Error load(const tinyxml2::XMLDocument &doc);
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/** this is primarily meant for unit tests. it only returns true/false */
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bool loadxmldata(const char xmldata[], std::size_t len);
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struct AllocFunc {
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int groupId;
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int arg;
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};
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/** get allocation info for function */
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const AllocFunc* alloc(const Token *tok) const;
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/** get deallocation info for function */
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const AllocFunc* dealloc(const Token *tok) const;
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/** get allocation id for function */
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int alloc(const Token *tok, int arg) const;
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/** get deallocation id for function */
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int dealloc(const Token *tok, int arg) const;
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/** get allocation info for function by name (deprecated, use other alloc) */
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const AllocFunc* alloc(const char name[]) const {
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return getAllocDealloc(_alloc, name);
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}
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/** get deallocation info for function by name (deprecated, use other alloc) */
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const AllocFunc* dealloc(const char name[]) const {
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return getAllocDealloc(_dealloc, name);
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}
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/** get allocation id for function by name (deprecated, use other alloc) */
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int allocId(const char name[]) const {
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const AllocFunc* af = getAllocDealloc(_alloc, name);
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return af ? af->groupId : 0;
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}
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/** get deallocation id for function by name (deprecated, use other alloc) */
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int deallocId(const char name[]) const {
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const AllocFunc* af = getAllocDealloc(_dealloc, name);
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return af ? af->groupId : 0;
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}
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/** set allocation id for function */
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void setalloc(const std::string &functionname, int id, int arg) {
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_alloc[functionname].groupId = id;
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_alloc[functionname].arg = arg;
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}
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void setdealloc(const std::string &functionname, int id, int arg) {
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_dealloc[functionname].groupId = id;
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_dealloc[functionname].arg = arg;
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}
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/** add noreturn function setting */
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void setnoreturn(const std::string& funcname, bool noreturn) {
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_noreturn[funcname] = noreturn;
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}
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/** is allocation type memory? */
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static bool ismemory(int id) {
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return ((id > 0) && ((id & 1) == 0));
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}
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static bool ismemory(const AllocFunc* func) {
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return ((func->groupId > 0) && ((func->groupId & 1) == 0));
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}
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/** is allocation type resource? */
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static bool isresource(int id) {
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return ((id > 0) && ((id & 1) == 1));
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}
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static bool isresource(const AllocFunc* func) {
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return ((func->groupId > 0) && ((func->groupId & 1) == 1));
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}
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bool formatstr_function(const Token* ftok) const;
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int formatstr_argno(const Token* ftok) const;
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bool formatstr_scan(const Token* ftok) const;
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bool formatstr_secure(const Token* ftok) const;
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struct WarnInfo {
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std::string message;
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Standards standards;
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Severity::SeverityType severity;
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};
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std::map<std::string, WarnInfo> functionwarn;
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const WarnInfo* getWarnInfo(const Token* ftok) const;
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// returns true if ftok is not a library function
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bool isNotLibraryFunction(const Token *ftok) const;
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bool matchArguments(const Token *ftok, const std::string &functionName) const;
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bool isUseRetVal(const Token* ftok) const;
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const std::string& returnValue(const Token *ftok) const;
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const std::string& returnValueType(const Token *ftok) const;
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int returnValueContainer(const Token *ftok) const;
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bool isnoreturn(const Token *ftok) const;
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bool isnotnoreturn(const Token *ftok) const;
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bool isScopeNoReturn(const Token *end, std::string *unknownFunc) const;
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class Container {
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public:
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Container() :
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type_templateArgNo(-1),
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size_templateArgNo(-1),
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arrayLike_indexOp(false),
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stdStringLike(false),
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opLessAllowed(true) {
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}
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enum Action {
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RESIZE, CLEAR, PUSH, POP, FIND, INSERT, ERASE, CHANGE_CONTENT, CHANGE, CHANGE_INTERNAL,
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NO_ACTION
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};
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enum Yield {
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AT_INDEX, ITEM, BUFFER, BUFFER_NT, START_ITERATOR, END_ITERATOR, ITERATOR, SIZE, EMPTY,
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NO_YIELD
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};
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struct Function {
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Action action;
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Yield yield;
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};
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std::string startPattern, endPattern, itEndPattern;
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std::map<std::string, Function> functions;
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int type_templateArgNo;
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int size_templateArgNo;
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bool arrayLike_indexOp;
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bool stdStringLike;
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bool opLessAllowed;
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Action getAction(const std::string& function) const {
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const std::map<std::string, Function>::const_iterator i = functions.find(function);
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if (i != functions.end())
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return i->second.action;
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return NO_ACTION;
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}
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Yield getYield(const std::string& function) const {
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const std::map<std::string, Function>::const_iterator i = functions.find(function);
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if (i != functions.end())
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return i->second.yield;
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return NO_YIELD;
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}
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};
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std::map<std::string, Container> containers;
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const Container* detectContainer(const Token* typeStart, bool iterator = false) const;
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class ArgumentChecks {
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public:
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ArgumentChecks() :
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notbool(false),
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notnull(false),
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notuninit(false),
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formatstr(false),
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strz(false),
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optional(false),
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variadic(false),
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iteratorInfo() {
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}
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bool notbool;
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bool notnull;
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bool notuninit;
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bool formatstr;
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bool strz;
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bool optional;
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bool variadic;
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std::string valid;
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class IteratorInfo {
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public:
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IteratorInfo() : container(0), it(false), first(false), last(false) {}
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int container;
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bool it;
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bool first;
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bool last;
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};
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IteratorInfo iteratorInfo;
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class MinSize {
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public:
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enum Type { NONE, STRLEN, ARGVALUE, SIZEOF, MUL };
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MinSize(Type t, int a) : type(t), arg(a), arg2(0) {}
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Type type;
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int arg;
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int arg2;
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};
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std::vector<MinSize> minsizes;
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};
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struct Function {
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std::map<int, ArgumentChecks> argumentChecks; // argument nr => argument data
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bool use;
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bool leakignore;
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bool isconst;
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bool ispure;
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bool useretval;
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bool ignore; // ignore functions/macros from a library (gtk, qt etc)
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bool formatstr;
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bool formatstr_scan;
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bool formatstr_secure;
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Function() : use(false), leakignore(false), isconst(false), ispure(false), useretval(false), ignore(false), formatstr(false), formatstr_scan(false), formatstr_secure(false) {}
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};
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std::map<std::string, Function> functions;
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bool isUse(const std::string& functionName) const;
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bool isLeakIgnore(const std::string& functionName) const;
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bool isFunctionConst(const std::string& functionName, bool pure) const;
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bool isFunctionConst(const Token *ftok) const;
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bool isboolargbad(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg && arg->notbool;
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}
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bool isnullargbad(const Token *ftok, int argnr) const;
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bool isuninitargbad(const Token *ftok, int argnr) const;
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bool isargformatstr(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg && arg->formatstr;
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}
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bool isargstrz(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg && arg->strz;
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}
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bool isargvalid(const Token *ftok, int argnr, const MathLib::bigint argvalue) const;
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const std::string& validarg(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg ? arg->valid : emptyString;
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}
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const ArgumentChecks::IteratorInfo *getArgIteratorInfo(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg && arg->iteratorInfo.it ? &arg->iteratorInfo : nullptr;
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}
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bool hasminsize(const std::string &functionName) const;
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const std::vector<ArgumentChecks::MinSize> *argminsizes(const Token *ftok, int argnr) const {
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const ArgumentChecks *arg = getarg(ftok, argnr);
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return arg ? &arg->minsizes : nullptr;
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}
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bool markupFile(const std::string &path) const;
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bool processMarkupAfterCode(const std::string &path) const;
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const std::set<std::string> &markupExtensions() const {
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return _markupExtensions;
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}
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bool reportErrors(const std::string &path) const;
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bool ignorefunction(const std::string &functionName) const;
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bool isexecutableblock(const std::string &file, const std::string &token) const;
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int blockstartoffset(const std::string &file) const;
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const std::string& blockstart(const std::string &file) const;
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const std::string& blockend(const std::string &file) const;
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bool iskeyword(const std::string &file, const std::string &keyword) const;
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bool isexporter(const std::string &prefix) const {
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return _exporters.find(prefix) != _exporters.end();
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}
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bool isexportedprefix(const std::string &prefix, const std::string &token) const {
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const std::map<std::string, ExportedFunctions>::const_iterator it = _exporters.find(prefix);
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return (it != _exporters.end() && it->second.isPrefix(token));
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}
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bool isexportedsuffix(const std::string &prefix, const std::string &token) const {
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const std::map<std::string, ExportedFunctions>::const_iterator it = _exporters.find(prefix);
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return (it != _exporters.end() && it->second.isSuffix(token));
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}
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bool isimporter(const std::string& file, const std::string &importer) const;
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bool isreflection(const std::string &token) const {
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return _reflection.find(token) != _reflection.end();
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}
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int reflectionArgument(const std::string &token) const {
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const std::map<std::string, int>::const_iterator it = _reflection.find(token);
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if (it != _reflection.end())
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return it->second;
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return -1;
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}
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std::set<std::string> returnuninitdata;
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std::vector<std::string> defines; // to provide some library defines
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struct PodType {
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unsigned int size;
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char sign;
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};
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const struct PodType *podtype(const std::string &name) const {
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const std::map<std::string, struct PodType>::const_iterator it = podtypes.find(name);
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return (it != podtypes.end()) ? &(it->second) : nullptr;
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}
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struct PlatformType {
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PlatformType()
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: _signed(false)
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, _unsigned(false)
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, _long(false)
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, _pointer(false)
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, _ptr_ptr(false)
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, _const_ptr(false) {
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}
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bool operator == (const PlatformType & type) const {
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return (_signed == type._signed &&
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_unsigned == type._unsigned &&
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_long == type._long &&
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_pointer == type._pointer &&
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_ptr_ptr == type._ptr_ptr &&
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_const_ptr == type._const_ptr &&
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_type == type._type);
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}
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bool operator != (const PlatformType & type) const {
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return !(*this == type);
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}
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std::string _type;
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bool _signed;
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bool _unsigned;
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bool _long;
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bool _pointer;
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bool _ptr_ptr;
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bool _const_ptr;
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};
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struct Platform {
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const PlatformType *platform_type(const std::string &name) const {
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const std::map<std::string, struct PlatformType>::const_iterator it = _platform_types.find(name);
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return (it != _platform_types.end()) ? &(it->second) : nullptr;
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}
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std::map<std::string, PlatformType> _platform_types;
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};
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const PlatformType *platform_type(const std::string &name, const std::string & platform) const {
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const std::map<std::string, Platform>::const_iterator it = platforms.find(platform);
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if (it != platforms.end()) {
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const PlatformType * const type = it->second.platform_type(name);
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if (type)
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return type;
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}
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const std::map<std::string, PlatformType>::const_iterator it2 = platform_types.find(name);
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return (it2 != platform_types.end()) ? &(it2->second) : nullptr;
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}
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/**
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* Get function name for function call
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*/
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std::string getFunctionName(const Token *ftok) const;
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static bool isContainerYield(const Token * const cond, Library::Container::Yield y, const std::string& fallback="");
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private:
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// load a <function> xml node
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Error loadFunction(const tinyxml2::XMLElement * const node, const std::string &name, std::set<std::string> &unknown_elements);
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class ExportedFunctions {
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public:
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void addPrefix(const std::string& prefix) {
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_prefixes.insert(prefix);
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}
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void addSuffix(const std::string& suffix) {
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_suffixes.insert(suffix);
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}
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bool isPrefix(const std::string& prefix) const {
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return (_prefixes.find(prefix) != _prefixes.end());
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}
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bool isSuffix(const std::string& suffix) const {
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return (_suffixes.find(suffix) != _suffixes.end());
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}
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private:
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std::set<std::string> _prefixes;
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std::set<std::string> _suffixes;
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};
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class CodeBlock {
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public:
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CodeBlock() : _offset(0) {}
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void setStart(const char* s) {
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_start = s;
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}
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void setEnd(const char* e) {
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_end = e;
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}
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void setOffset(const int o) {
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_offset = o;
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}
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void addBlock(const char* blockName) {
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_blocks.insert(blockName);
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}
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const std::string& start() const {
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return _start;
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}
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const std::string& end() const {
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return _end;
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}
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int offset() const {
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return _offset;
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}
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bool isBlock(const std::string& blockName) const {
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return _blocks.find(blockName) != _blocks.end();
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}
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private:
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std::string _start;
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std::string _end;
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int _offset;
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std::set<std::string> _blocks;
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};
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int allocid;
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std::set<std::string> _files;
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std::map<std::string, AllocFunc> _alloc; // allocation functions
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std::map<std::string, AllocFunc> _dealloc; // deallocation functions
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std::map<std::string, bool> _noreturn; // is function noreturn?
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std::map<std::string, std::string> _returnValue;
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std::map<std::string, std::string> _returnValueType;
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std::map<std::string, int> _returnValueContainer;
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std::map<std::string, bool> _reporterrors;
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std::map<std::string, bool> _processAfterCode;
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std::set<std::string> _markupExtensions; // file extensions of markup files
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std::map<std::string, std::set<std::string> > _keywords; // keywords for code in the library
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std::map<std::string, CodeBlock> _executableblocks; // keywords for blocks of executable code
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std::map<std::string, ExportedFunctions> _exporters; // keywords that export variables/functions to libraries (meta-code/macros)
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std::map<std::string, std::set<std::string> > _importers; // keywords that import variables/functions
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std::map<std::string, int> _reflection; // invocation of reflection
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std::map<std::string, struct PodType> podtypes; // pod types
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std::map<std::string, PlatformType> platform_types; // platform independent typedefs
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std::map<std::string, Platform> platforms; // platform dependent typedefs
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const ArgumentChecks * getarg(const Token *ftok, int argnr) const;
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std::string getFunctionName(const Token *ftok, bool *error) const;
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static const AllocFunc* getAllocDealloc(const std::map<std::string, AllocFunc> &data, const std::string &name) {
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const std::map<std::string, AllocFunc>::const_iterator it = data.find(name);
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return (it == data.end()) ? nullptr : &it->second;
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}
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // libraryH
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