cppcheck/lib/errorlogger.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2016 Cppcheck team.
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*
* 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/>.
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*/
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#include "errorlogger.h"
#include "path.h"
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#include "cppcheck.h"
#include "tokenlist.h"
#include "token.h"
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#include <tinyxml2.h>
#include <cassert>
#include <iomanip>
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#include <sstream>
#include <array>
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InternalError::InternalError(const Token *tok, const std::string &errorMsg, Type type) :
token(tok), errorMessage(errorMsg)
{
switch (type) {
case SYNTAX:
id = "syntaxError";
break;
case INTERNAL:
id = "cppcheckError";
break;
}
}
ErrorLogger::ErrorMessage::ErrorMessage()
: _severity(Severity::none), _cwe(0U), _inconclusive(false)
{
}
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ErrorLogger::ErrorMessage::ErrorMessage(const std::list<FileLocation> &callStack, Severity::SeverityType severity, const std::string &msg, const std::string &id, bool inconclusive) :
_callStack(callStack), // locations for this error message
_id(id), // set the message id
_severity(severity), // severity for this error message
_cwe(0U),
_inconclusive(inconclusive)
{
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// set the summary and verbose messages
setmsg(msg);
}
ErrorLogger::ErrorMessage::ErrorMessage(const std::list<const Token*>& callstack, const TokenList* list, Severity::SeverityType severity, const std::string& id, const std::string& msg, bool inconclusive)
: _id(id), _severity(severity), _cwe(0U), _inconclusive(inconclusive)
{
// Format callstack
for (std::list<const Token *>::const_iterator it = callstack.begin(); it != callstack.end(); ++it) {
// --errorlist can provide null values here
if (!(*it))
continue;
_callStack.push_back(ErrorLogger::ErrorMessage::FileLocation(*it, list));
}
if (list && !list->getFiles().empty())
file0 = list->getFiles()[0];
setmsg(msg);
}
void ErrorLogger::ErrorMessage::setmsg(const std::string &msg)
{
// If a message ends to a '\n' and contains only a one '\n'
// it will cause the _verboseMessage to be empty which will show
// as an empty message to the user if --verbose is used.
// Even this doesn't cause problems with messages that have multiple
// lines, none of the the error messages should end into it.
assert(!(msg.back() =='\n'));
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// The summary and verbose message are separated by a newline
// If there is no newline then both the summary and verbose messages
// are the given message
const std::string::size_type pos = msg.find('\n');
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if (pos == std::string::npos) {
_shortMessage = msg;
_verboseMessage = msg;
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} else {
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_shortMessage = msg.substr(0, pos);
_verboseMessage = msg.substr(pos + 1);
}
}
std::string ErrorLogger::ErrorMessage::serialize() const
{
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// Serialize this message into a simple string
std::ostringstream oss;
oss << _id.length() << " " << _id;
oss << Severity::toString(_severity).length() << " " << Severity::toString(_severity);
oss << MathLib::toString(_cwe).length() << " " << MathLib::toString(_cwe);
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if (_inconclusive) {
const std::string inconclusive("inconclusive");
oss << inconclusive.length() << " " << inconclusive;
}
const std::string saneShortMessage = fixInvalidChars(_shortMessage);
const std::string saneVerboseMessage = fixInvalidChars(_verboseMessage);
oss << saneShortMessage.length() << " " << saneShortMessage;
oss << saneVerboseMessage.length() << " " << saneVerboseMessage;
oss << _callStack.size() << " ";
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for (std::list<ErrorLogger::ErrorMessage::FileLocation>::const_iterator tok = _callStack.begin(); tok != _callStack.end(); ++tok) {
std::ostringstream smallStream;
smallStream << (*tok).line << ":" << (*tok).getfile();
oss << smallStream.str().length() << " " << smallStream.str();
}
return oss.str();
}
bool ErrorLogger::ErrorMessage::deserialize(const std::string &data)
{
_inconclusive = false;
_callStack.clear();
std::istringstream iss(data);
std::array<std::string, 5> results;
std::size_t elem = 0;
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while (iss.good()) {
unsigned int len = 0;
if (!(iss >> len))
return false;
iss.get();
std::string temp;
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for (unsigned int i = 0; i < len && iss.good(); ++i) {
char c = static_cast<char>(iss.get());
temp.append(1, c);
}
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if (temp == "inconclusive") {
_inconclusive = true;
continue;
}
results[elem++] = temp;
if (elem == 5)
break;
}
if (elem != 5)
throw InternalError(0, "Internal Error: Deserialization of error message failed");
_id = results[0];
_severity = Severity::fromString(results[1]);
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std::istringstream scwe(results[2]);
scwe >> _cwe;
_shortMessage = results[3];
_verboseMessage = results[4];
unsigned int stackSize = 0;
if (!(iss >> stackSize))
return false;
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while (iss.good()) {
unsigned int len = 0;
if (!(iss >> len))
return false;
iss.get();
std::string temp;
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for (unsigned int i = 0; i < len && iss.good(); ++i) {
char c = static_cast<char>(iss.get());
temp.append(1, c);
}
const std::string::size_type colonPos = temp.find(':');
if (colonPos == std::string::npos)
throw InternalError(0, "Internal Error: No colon found in <filename:line> pattern");
ErrorLogger::ErrorMessage::FileLocation loc;
loc.setfile(temp.substr(colonPos + 1));
temp = temp.substr(0, colonPos);
std::istringstream fiss(temp);
fiss >> loc.line;
_callStack.push_back(loc);
if (_callStack.size() >= stackSize)
break;
}
return true;
}
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std::string ErrorLogger::ErrorMessage::getXMLHeader(int xml_version)
{
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// xml_version 1 is the default xml format
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tinyxml2::XMLPrinter printer;
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// standard xml header
printer.PushDeclaration("xml version=\"1.0\" encoding=\"UTF-8\"");
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// header
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printer.OpenElement("results", false);
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// version 2 header
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if (xml_version == 2) {
printer.PushAttribute("version", xml_version);
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printer.OpenElement("cppcheck", false);
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printer.PushAttribute("version", CppCheck::version());
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printer.CloseElement(false);
printer.OpenElement("errors", false);
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}
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return std::string(printer.CStr()) + '>';
}
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std::string ErrorLogger::ErrorMessage::getXMLFooter(int xml_version)
{
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return (xml_version<=1) ? "</results>" : " </errors>\n</results>";
}
// There is no utf-8 support around but the strings should at least be safe for to tinyxml2.
// See #5300 "Invalid encoding in XML output" and #6431 "Invalid XML created - Invalid encoding of string literal "
std::string ErrorLogger::ErrorMessage::fixInvalidChars(const std::string& raw)
{
std::string result;
result.reserve(raw.length());
std::string::const_iterator from=raw.begin();
while (from!=raw.end()) {
if (std::isprint(static_cast<unsigned char>(*from))) {
result.push_back(*from);
} else {
std::ostringstream es;
// straight cast to (unsigned) doesn't work out.
const unsigned uFrom = (unsigned char)*from;
#if 0
if (uFrom<0x20)
es << "\\XXX";
else
#endif
es << '\\' << std::setbase(8) << std::setw(3) << std::setfill('0') << uFrom;
result += es.str();
}
++from;
}
return result;
}
std::string ErrorLogger::ErrorMessage::toXML(bool verbose, int version) const
{
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// The default xml format
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if (version == 1) {
// No inconclusive messages in the xml version 1
if (_inconclusive)
return "";
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tinyxml2::XMLPrinter printer(0, false, 1);
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printer.OpenElement("error", false);
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if (!_callStack.empty()) {
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printer.PushAttribute("file", _callStack.back().getfile().c_str());
printer.PushAttribute("line", _callStack.back().line);
}
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printer.PushAttribute("id", _id.c_str());
printer.PushAttribute("severity", (_severity == Severity::error ? "error" : "style"));
printer.PushAttribute("msg", (verbose ? _verboseMessage : _shortMessage).c_str());
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printer.CloseElement(false);
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return printer.CStr();
}
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// The xml format you get when you use --xml-version=2
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else if (version == 2) {
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tinyxml2::XMLPrinter printer(0, false, 2);
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printer.OpenElement("error", false);
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printer.PushAttribute("id", _id.c_str());
printer.PushAttribute("severity", Severity::toString(_severity).c_str());
printer.PushAttribute("msg", fixInvalidChars(_shortMessage).c_str());
printer.PushAttribute("verbose", fixInvalidChars(_verboseMessage).c_str());
if (_cwe)
printer.PushAttribute("cwe", _cwe);
if (_inconclusive)
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printer.PushAttribute("inconclusive", "true");
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for (std::list<FileLocation>::const_reverse_iterator it = _callStack.rbegin(); it != _callStack.rend(); ++it) {
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printer.OpenElement("location", false);
if (!file0.empty() && (*it).getfile() != file0)
printer.PushAttribute("file0", Path::toNativeSeparators(file0).c_str());
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printer.PushAttribute("file", (*it).getfile().c_str());
printer.PushAttribute("line", (*it).line);
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printer.CloseElement(false);
}
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printer.CloseElement(false);
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return printer.CStr();
}
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return "";
}
void ErrorLogger::ErrorMessage::findAndReplace(std::string &source, const std::string &searchFor, const std::string &replaceWith)
{
std::string::size_type index = 0;
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while ((index = source.find(searchFor, index)) != std::string::npos) {
source.replace(index, searchFor.length(), replaceWith);
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index += replaceWith.length();
}
}
std::string ErrorLogger::ErrorMessage::toString(bool verbose, const std::string &outputFormat) const
{
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// Save this ErrorMessage in plain text.
// No template is given
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if (outputFormat.length() == 0) {
std::ostringstream text;
if (!_callStack.empty())
text << callStackToString(_callStack) << ": ";
if (_severity != Severity::none) {
text << '(' << Severity::toString(_severity);
if (_inconclusive)
text << ", inconclusive";
text << ") ";
}
text << (verbose ? _verboseMessage : _shortMessage);
return text.str();
}
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// template is given. Reformat the output according to it
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else {
std::string result = outputFormat;
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// Support a few special characters to allow to specific formatting, see http://sourceforge.net/apps/phpbb/cppcheck/viewtopic.php?f=4&t=494&sid=21715d362c0dbafd3791da4d9522f814
// Substitution should be done first so messages from cppcheck never get translated.
findAndReplace(result, "\\b", "\b");
findAndReplace(result, "\\n", "\n");
findAndReplace(result, "\\r", "\r");
findAndReplace(result, "\\t", "\t");
findAndReplace(result, "{id}", _id);
findAndReplace(result, "{severity}", Severity::toString(_severity));
findAndReplace(result, "{message}", verbose ? _verboseMessage : _shortMessage);
findAndReplace(result, "{callstack}", _callStack.empty() ? "" : callStackToString(_callStack));
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if (!_callStack.empty()) {
std::ostringstream oss;
oss << _callStack.back().line;
findAndReplace(result, "{line}", oss.str());
findAndReplace(result, "{file}", _callStack.back().getfile());
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} else {
findAndReplace(result, "{file}", "");
findAndReplace(result, "{line}", "");
}
return result;
}
}
void ErrorLogger::reportUnmatchedSuppressions(const std::list<Suppressions::SuppressionEntry> &unmatched)
{
// Report unmatched suppressions
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for (std::list<Suppressions::SuppressionEntry>::const_iterator i = unmatched.begin(); i != unmatched.end(); ++i) {
// don't report "unmatchedSuppression" as unmatched
if (i->id == "unmatchedSuppression")
continue;
// check if this unmatched suppression is suppressed
bool suppressed = false;
for (std::list<Suppressions::SuppressionEntry>::const_iterator i2 = unmatched.begin(); i2 != unmatched.end(); ++i2) {
if (i2->id == "unmatchedSuppression") {
if ((i2->file == "*" || i2->file == i->file) &&
(i2->line == 0 || i2->line == i->line)) {
suppressed = true;
break;
}
}
}
if (suppressed)
continue;
std::list<ErrorLogger::ErrorMessage::FileLocation> callStack;
callStack.push_back(ErrorLogger::ErrorMessage::FileLocation(i->file, i->line));
reportErr(ErrorLogger::ErrorMessage(callStack, Severity::information, "Unmatched suppression: " + i->id, "unmatchedSuppression", false));
}
}
std::string ErrorLogger::callStackToString(const std::list<ErrorLogger::ErrorMessage::FileLocation> &callStack)
{
std::ostringstream ostr;
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for (std::list<ErrorLogger::ErrorMessage::FileLocation>::const_iterator tok = callStack.begin(); tok != callStack.end(); ++tok) {
ostr << (tok == callStack.begin() ? "" : " -> ") << tok->stringify();
}
return ostr.str();
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}
ErrorLogger::ErrorMessage::FileLocation::FileLocation(const Token* tok, const TokenList* list)
: line(tok->linenr()), _file(list->file(tok))
{
}
std::string ErrorLogger::ErrorMessage::FileLocation::getfile(bool convert) const
{
if (convert)
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return Path::toNativeSeparators(_file);
return _file;
}
void ErrorLogger::ErrorMessage::FileLocation::setfile(const std::string &file)
{
_file = file;
_file = Path::fromNativeSeparators(_file);
_file = Path::simplifyPath(_file);
}
std::string ErrorLogger::ErrorMessage::FileLocation::stringify() const
{
std::ostringstream oss;
oss << '[' << Path::toNativeSeparators(_file);
if (line != 0)
oss << ':' << line;
oss << ']';
return oss.str();
}
std::string ErrorLogger::toxml(const std::string &str)
{
std::ostringstream xml;
const bool isstring(str[0] == '\"');
for (std::size_t i = 0U; i < str.length(); i++) {
char c = str[i];
switch (c) {
case '<':
xml << "&lt;";
break;
case '>':
xml << "&gt;";
break;
case '&':
xml << "&amp;";
break;
case '\"':
xml << "&quot;";
break;
case '\0':
xml << "\\0";
break;
default:
if (!isstring || (c >= ' ' && c <= 'z'))
xml << c;
else
xml << 'x';
break;
}
}
return xml.str();
}