cppcheck/lib/errorlogger.h

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2021 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/>.
 */

//---------------------------------------------------------------------------
#ifndef errorloggerH
#define errorloggerH
//---------------------------------------------------------------------------

#include "config.h"
#include "errortypes.h"
#include "suppressions.h"

#include <cstddef>
#include <fstream>
#include <list>
#include <string>
#include <utility>
#include <vector>

/**
 * CWE id (Common Weakness Enumeration)
 * See https://cwe.mitre.org/ for further reference.
 * */
// CWE list: https://cwe.mitre.org/data/published/cwe_v3.4.1.pdf
static const struct CWE CWE_USE_OF_UNINITIALIZED_VARIABLE(457U);
static const struct CWE CWE_NULL_POINTER_DEREFERENCE(476U);
static const struct CWE CWE_USE_OF_POTENTIALLY_DANGEROUS_FUNCTION(676U);
static const struct CWE CWE_INCORRECT_CALCULATION(682U);
static const struct CWE CWE_EXPIRED_POINTER_DEREFERENCE(825U);


class Token;
class TokenList;

namespace tinyxml2 {
    class XMLElement;
}

/// @addtogroup Core
/// @{

/**
     * Wrapper for error messages, provided by reportErr()
     */
class CPPCHECKLIB ErrorMessage {
public:
    /**
     * File name and line number.
     * Internally paths are stored with / separator. When getting the filename
     * it is by default converted to native separators.
     */
    class CPPCHECKLIB FileLocation {
    public:
        FileLocation()
            : fileIndex(0), line(0), column(0) {
        }

        FileLocation(const std::string &file, int line, unsigned int column)
            : fileIndex(0), line(line), column(column), mOrigFileName(file), mFileName(file) {
        }

        FileLocation(const std::string &file, const std::string &info, int line, unsigned int column)
            : fileIndex(0), line(line), column(column), mOrigFileName(file), mFileName(file), mInfo(info) {
        }

        FileLocation(const Token* tok, const TokenList* tokenList);
        FileLocation(const Token* tok, const std::string &info, const TokenList* tokenList);

        /**
         * Return the filename.
         * @param convert If true convert path to native separators.
         * @return filename.
         */
        std::string getfile(bool convert = true) const;

        /**
         * Filename with the whole path (no --rp)
         * @param convert If true convert path to native separators.
         * @return filename.
         */
        std::string getOrigFile(bool convert = true) const;

        /**
         * Set the filename.
         * @param file Filename to set.
         */
        void setfile(const std::string &file);

        /**
         * @return the location as a string. Format: [file:line]
         */
        std::string stringify() const;

        unsigned int fileIndex;
        int line; // negative value means "no line"
        unsigned int column;

        std::string getinfo() const {
            return mInfo;
        }
        void setinfo(const std::string &i) {
            mInfo = i;
        }

    private:
        std::string mOrigFileName;
        std::string mFileName;
        std::string mInfo;
    };

    ErrorMessage(const std::list<FileLocation> &callStack,
                 const std::string& file1,
                 Severity::SeverityType severity,
                 const std::string &msg,
                 const std::string &id, Certainty::CertaintyLevel certainty);
    ErrorMessage(const std::list<FileLocation> &callStack,
                 const std::string& file1,
                 Severity::SeverityType severity,
                 const std::string &msg,
                 const std::string &id,
                 const CWE &cwe,
                 Certainty::CertaintyLevel certainty);
    ErrorMessage(const std::list<const Token*>& callstack,
                 const TokenList* list,
                 Severity::SeverityType severity,
                 const std::string& id,
                 const std::string& msg,
                 Certainty::CertaintyLevel certainty);
    ErrorMessage(const std::list<const Token*>& callstack,
                 const TokenList* list,
                 Severity::SeverityType severity,
                 const std::string& id,
                 const std::string& msg,
                 const CWE &cwe,
                 Certainty::CertaintyLevel certainty,
                 bool bugHunting);
    ErrorMessage(const ErrorPath &errorPath,
                 const TokenList *tokenList,
                 Severity::SeverityType severity,
                 const char id[],
                 const std::string &msg,
                 const CWE &cwe,
                 Certainty::CertaintyLevel certainty,
                 bool bugHunting);
    ErrorMessage();
    explicit ErrorMessage(const tinyxml2::XMLElement * const errmsg);

    /**
     * Format the error message in XML format
     */
    std::string toXML() const;

    static std::string getXMLHeader();
    static std::string getXMLFooter();

    /**
     * Format the error message into a string.
     * @param verbose use verbose message
     * @param templateFormat Empty string to use default output format
     * or template to be used. E.g. "{file}:{line},{severity},{id},{message}"
     * @param templateLocation Format Empty string to use default output format
     * or template to be used. E.g. "{file}:{line},{info}"
    * @return formatted string
     */
    std::string toString(bool verbose,
                         const std::string &templateFormat = emptyString,
                         const std::string &templateLocation = emptyString) const;

    std::string serialize() const;
    bool deserialize(const std::string &data);

    std::list<FileLocation> callStack;
    std::string id;

    /** For GUI rechecking; source file (not header) */
    std::string file0;
    /** For GUI bug hunting; function name */
    std::string function;
    /** For GUI bug hunting; incomplete analysis */
    bool incomplete;

    Severity::SeverityType severity;
    CWE cwe;
    Certainty::CertaintyLevel certainty;

    /** Warning hash */
    std::size_t hash;

    /** set short and verbose messages */
    void setmsg(const std::string &msg);

    /** Short message (single line short message) */
    const std::string &shortMessage() const {
        return mShortMessage;
    }

    /** Verbose message (may be the same as the short message) */
    const std::string &verboseMessage() const {
        return mVerboseMessage;
    }

    /** Symbol names */
    const std::string &symbolNames() const {
        return mSymbolNames;
    }

    Suppressions::ErrorMessage toSuppressionsErrorMessage() const;

private:
    /**
     * Replace all occurrences of searchFor with replaceWith in the
     * given source.
     * @param source The string to modify
     * @param searchFor What should be searched for
     * @param replaceWith What will replace the found item
     */
    static void findAndReplace(std::string &source, const std::string &searchFor, const std::string &replaceWith);

    static std::string fixInvalidChars(const std::string& raw);

    /** Short message */
    std::string mShortMessage;

    /** Verbose message */
    std::string mVerboseMessage;

    /** symbol names */
    std::string mSymbolNames;
};

/**
 * @brief This is an interface, which the class responsible of error logging
 * should implement.
 */
class CPPCHECKLIB ErrorLogger {
protected:
    std::ofstream plistFile;
public:
    ErrorLogger() { }
    virtual ~ErrorLogger() {
        if (plistFile.is_open()) {
            plistFile << ErrorLogger::plistFooter();
            plistFile.close();
        }
    }

    /**
     * Information about progress is directed here.
     * Override this to receive the progress messages.
     *
     * @param outmsg Message to show e.g. "Checking main.cpp..."
     */
    virtual void reportOut(const std::string &outmsg) = 0;

    /**
     * Information about found errors and warnings is directed
     * here. Override this to receive the errormessages.
     *
     * @param msg Location and other information about the found error.
     */
    virtual void reportErr(const ErrorMessage &msg) = 0;

    /**
     * Report progress to client
     * @param filename main file that is checked
     * @param stage for example preprocess / tokenize / simplify / check
     * @param value progress value (0-100)
     */
    virtual void reportProgress(const std::string &filename, const char stage[], const std::size_t value) {
        (void)filename;
        (void)stage;
        (void)value;
    }

    /**
     * Output information messages.
     * @param msg Location and other information about the found error.
     */
    virtual void reportInfo(const ErrorMessage &msg) {
        reportErr(msg);
    }

    virtual void bughuntingReport(const std::string &str) = 0;

    /**
     * Report unmatched suppressions
     * @param unmatched list of unmatched suppressions (from Settings::Suppressions::getUnmatched(Local|Global)Suppressions)
     * @return true is returned if errors are reported
     */
    bool reportUnmatchedSuppressions(const std::list<Suppressions::Suppression> &unmatched);

    static std::string callStackToString(const std::list<ErrorMessage::FileLocation> &callStack);

    /**
     * Convert XML-sensitive characters into XML entities
     * @param str The input string containing XML-sensitive characters
     * @return The output string containing XML entities
     */
    static std::string toxml(const std::string &str);

    static std::string plistHeader(const std::string &version, const std::vector<std::string> &files);
    static std::string plistData(const ErrorMessage &msg);
    static const char *plistFooter() {
        return " </array>\r\n"
               "</dict>\r\n"
               "</plist>";
    }
};

/** Replace substring. Example replaceStr("1,NR,3", "NR", "2") => "1,2,3" */
std::string replaceStr(std::string s, const std::string &from, const std::string &to);

/// @}
//---------------------------------------------------------------------------
#endif // errorloggerH