Skip to content
Navigation Menu
{{ message }}
forked from cppcheck-opensource/cppcheck
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcppcheck.cpp
More file actions
699 lines (580 loc) · 23.7 KB
/
Copy pathcppcheck.cpp
File metadata and controls
699 lines (580 loc) · 23.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cppcheck.h"
#include "preprocessor.h" // Preprocessor
#include "tokenize.h" // Tokenizer
#include "check.h"
#include "path.h"
#include <algorithm>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include "timer.h"
#include "version.h"
#ifdef HAVE_RULES
#define PCRE_STATIC
#include <pcre.h>
#endif
static const char Version[] = CPPCHECK_VERSION_STRING;
static const char ExtraVersion[] = "";
static TimerResults S_timerResults;
CppCheck::CppCheck(ErrorLogger &errorLogger, bool useGlobalSuppressions)
: _errorLogger(errorLogger), exitcode(0), _useGlobalSuppressions(useGlobalSuppressions), tooManyConfigs(false), _simplify(true)
{
}
CppCheck::~CppCheck()
{
while (!fileInfo.empty()) {
delete fileInfo.back();
fileInfo.pop_back();
}
S_timerResults.ShowResults(_settings._showtime);
}
const char * CppCheck::version()
{
return Version;
}
const char * CppCheck::extraVersion()
{
return ExtraVersion;
}
unsigned int CppCheck::check(const std::string &path)
{
std::ifstream fin(path.c_str());
return processFile(path, fin);
}
unsigned int CppCheck::check(const std::string &path, const std::string &content)
{
std::istringstream iss(content);
return processFile(path, iss);
}
void CppCheck::replaceAll(std::string& code, const std::string &from, const std::string &to)
{
std::size_t pos = 0;
while ((pos = code.find(from, pos)) != std::string::npos) {
code.replace(pos, from.length(), to);
pos += to.length();
}
}
bool CppCheck::findError(std::string code, const char FileName[])
{
std::set<unsigned long long> checksums;
// First make sure that error occurs with the original code
bool internalErrorFound(false);
checkFile(code, FileName, checksums, internalErrorFound);
if (_errorList.empty()) {
// Error does not occur with this code
return false;
}
const std::string previousCode = code;
std::string error = _errorList.front();
for (;;) {
// Try to remove included files from the source
const std::size_t found = previousCode.rfind("\n#endfile");
if (found == std::string::npos) {
// No modifications can be done to the code
} else {
// Modify code and re-check it to see if error
// is still there.
code = previousCode.substr(found+9);
_errorList.clear();
checksums.clear();
checkFile(code, FileName, checksums, internalErrorFound);
}
if (_errorList.empty()) {
// Latest code didn't fail anymore. Fall back
// to previous code
code = previousCode;
} else {
error = _errorList.front();
}
// Add '\n' so that "\n#file" on first line would be found
code = "// " + error + "\n" + code;
replaceAll(code, "\n#file", "\n// #file");
replaceAll(code, "\n#endfile", "\n// #endfile");
// We have reduced the code as much as we can. Print out
// the code and quit.
_errorLogger.reportOut(code);
break;
}
return true;
}
unsigned int CppCheck::processFile(const std::string& filename, std::istream& fileStream)
{
exitcode = 0;
// only show debug warnings for accepted C/C++ source files
if (!Path::acceptFile(filename))
_settings.debugwarnings = false;
if (_settings.terminated())
return exitcode;
if (_settings.quiet == false) {
std::string fixedpath = Path::simplifyPath(filename);
fixedpath = Path::toNativeSeparators(fixedpath);
_errorLogger.reportOut(std::string("Checking ") + fixedpath + std::string("..."));
}
bool internalErrorFound(false);
try {
Preprocessor preprocessor(_settings, this);
std::list<std::string> configurations;
std::string filedata;
{
Timer t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
preprocessor.preprocess(fileStream, filedata, configurations, filename, _settings._includePaths);
}
if (_settings.checkConfiguration) {
return 0;
}
// Run rules on this code
for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
if (it->tokenlist == "define") {
Tokenizer tokenizer2(&_settings, this);
std::istringstream istr2(filedata);
tokenizer2.list.createTokens(istr2, filename);
for (const Token *tok = tokenizer2.list.front(); tok; tok = tok->next()) {
if (tok->str() == "#define") {
std::string code = std::string(tok->linenr()-1U, '\n');
for (const Token *tok2 = tok; tok2 && tok2->linenr() == tok->linenr(); tok2 = tok2->next())
code += " " + tok2->str();
Tokenizer tokenizer3(&_settings, this);
std::istringstream istr3(code);
tokenizer3.list.createTokens(istr3, tokenizer2.list.file(tok));
executeRules("define", tokenizer3);
}
}
break;
}
}
if (!_settings.userDefines.empty() && _settings._maxConfigs==1U) {
configurations.clear();
configurations.push_back(_settings.userDefines);
}
if (!_settings._force && configurations.size() > _settings._maxConfigs) {
if (_settings.isEnabled("information")) {
tooManyConfigsError(Path::toNativeSeparators(filename),configurations.size());
} else {
tooManyConfigs = true;
}
}
std::set<unsigned long long> checksums;
unsigned int checkCount = 0;
for (std::list<std::string>::const_iterator it = configurations.begin(); it != configurations.end(); ++it) {
// Check only a few configurations (default 12), after that bail out, unless --force
// was used.
if (!_settings._force && ++checkCount > _settings._maxConfigs)
break;
cfg = *it;
// If only errors are printed, print filename after the check
if (_settings.quiet == false && it != configurations.begin()) {
std::string fixedpath = Path::simplifyPath(filename);
fixedpath = Path::toNativeSeparators(fixedpath);
_errorLogger.reportOut("Checking " + fixedpath + ": " + cfg + "...");
}
if (!_settings.userDefines.empty()) {
if (!cfg.empty())
cfg = ";" + cfg;
cfg = _settings.userDefines + cfg;
}
Timer t("Preprocessor::getcode", _settings._showtime, &S_timerResults);
std::string codeWithoutCfg = preprocessor.getcode(filedata, cfg, filename);
t.Stop();
codeWithoutCfg += _settings.append();
if (_settings.debugFalsePositive) {
if (findError(codeWithoutCfg, filename.c_str())) {
return exitcode;
}
} else {
if (!checkFile(codeWithoutCfg, filename.c_str(), checksums, internalErrorFound)) {
if (_settings.isEnabled("information") && (_settings.debug || _settings._verbose))
purgedConfigurationMessage(filename, cfg);
}
}
}
} catch (const std::runtime_error &e) {
internalError(filename, e.what());
} catch (const InternalError &e) {
internalError(filename, e.errorMessage);
exitcode=1; // e.g. reflect a syntax error
}
// In jointSuppressionReport mode, unmatched suppressions are
// collected after all files are processed
if (!_settings.jointSuppressionReport && (_settings.isEnabled("information") || _settings.checkConfiguration)) {
reportUnmatchedSuppressions(_settings.nomsg.getUnmatchedLocalSuppressions(filename, unusedFunctionCheckIsEnabled()));
}
_errorList.clear();
if (internalErrorFound && (exitcode==0)) {
exitcode=1;
}
return exitcode;
}
void CppCheck::internalError(const std::string &filename, const std::string &msg)
{
const std::string fixedpath = Path::toNativeSeparators(filename);
const std::string fullmsg("Bailing out from checking " + fixedpath + " since there was an internal error: " + msg);
if (_settings.isEnabled("information")) {
const ErrorLogger::ErrorMessage::FileLocation loc1(filename, 0);
std::list<ErrorLogger::ErrorMessage::FileLocation> callstack;
callstack.push_back(loc1);
ErrorLogger::ErrorMessage errmsg(callstack,
Severity::information,
fullmsg,
"internalError",
false);
_errorLogger.reportErr(errmsg);
} else {
// Report on stdout
_errorLogger.reportOut(fullmsg);
}
}
void CppCheck::analyseFile(std::istream &fin, const std::string &filename)
{
// Preprocess file..
Preprocessor preprocessor(_settings, this);
std::list<std::string> configurations;
std::string filedata;
preprocessor.preprocess(fin, filedata, configurations, filename, _settings._includePaths);
const std::string code = preprocessor.getcode(filedata, "", filename);
if (_settings.checkConfiguration) {
return;
}
// Tokenize..
Tokenizer tokenizer(&_settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, filename.c_str());
tokenizer.simplifyTokenList2();
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a specified file
//---------------------------------------------------------------------------
bool CppCheck::checkFile(const std::string &code, const char FileName[], std::set<unsigned long long>& checksums, bool& internalErrorFound)
{
internalErrorFound=false;
if (_settings.terminated() || _settings.checkConfiguration)
return true;
Tokenizer _tokenizer(&_settings, this);
if (_settings._showtime != SHOWTIME_NONE)
_tokenizer.setTimerResults(&S_timerResults);
try {
// Execute rules for "raw" code
for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
if (it->tokenlist == "raw") {
Tokenizer tokenizer2(&_settings, this);
std::istringstream istr(code);
tokenizer2.list.createTokens(istr, FileName);
executeRules("raw", tokenizer2);
break;
}
}
// Tokenize the file
std::istringstream istr(code);
Timer timer("Tokenizer::tokenize", _settings._showtime, &S_timerResults);
bool result = _tokenizer.tokenize(istr, FileName, cfg);
timer.Stop();
if (_settings._force || _settings._maxConfigs > 1) {
const unsigned long long checksum = _tokenizer.list.calculateChecksum();
if (checksums.find(checksum) != checksums.end())
return false;
checksums.insert(checksum);
}
if (!result) {
// File had syntax errors, abort
return true;
}
// dump
if (_settings.dump) {
std::string dumpfile = std::string(FileName) + ".dump";
std::ofstream fdump(dumpfile.c_str());
if (fdump.is_open()) {
fdump << "<?xml version=\"1.0\"?>" << std::endl;
fdump << "<dump cfg=\"" << cfg << "\">" << std::endl;
_tokenizer.dump(fdump);
fdump << "</dump>" << std::endl;
}
return true;
}
// call all "runChecks" in all registered Check classes
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
if (_settings.terminated())
return true;
Timer timerRunChecks((*it)->name() + "::runChecks", _settings._showtime, &S_timerResults);
(*it)->runChecks(&_tokenizer, &_settings, this);
}
// Analyse the tokens..
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
Check::FileInfo *fi = (*it)->getFileInfo(&_tokenizer, &_settings);
if (fi != nullptr)
fileInfo.push_back(fi);
}
executeRules("normal", _tokenizer);
if (!_simplify)
return true;
Timer timer3("Tokenizer::simplifyTokenList2", _settings._showtime, &S_timerResults);
result = _tokenizer.simplifyTokenList2();
timer3.Stop();
if (!result)
return true;
// call all "runSimplifiedChecks" in all registered Check classes
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
if (_settings.terminated())
return true;
Timer timerSimpleChecks((*it)->name() + "::runSimplifiedChecks", _settings._showtime, &S_timerResults);
(*it)->runSimplifiedChecks(&_tokenizer, &_settings, this);
}
if (_settings.terminated())
return true;
executeRules("simple", _tokenizer);
if (_settings.terminated())
return true;
} catch (const InternalError &e) {
internalErrorFound=true;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
if (e.token) {
loc.line = e.token->linenr();
const std::string fixedpath = Path::toNativeSeparators(_tokenizer.list.file(e.token));
loc.setfile(fixedpath);
} else {
ErrorLogger::ErrorMessage::FileLocation loc2;
loc2.setfile(Path::toNativeSeparators(FileName));
locationList.push_back(loc2);
loc.setfile(_tokenizer.list.getSourceFilePath());
}
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::error,
e.errorMessage,
e.id,
false);
reportErr(errmsg);
}
return true;
}
void CppCheck::executeRules(const std::string &tokenlist, const Tokenizer &tokenizer)
{
(void)tokenlist;
(void)tokenizer;
#ifdef HAVE_RULES
// Are there rules to execute?
bool isrule = false;
for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
if (it->tokenlist == tokenlist)
isrule = true;
}
// There is no rule to execute
if (isrule == false)
return;
// Write all tokens in a string that can be parsed by pcre
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
const std::string str(ostr.str());
for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
const Settings::Rule &rule = *it;
if (rule.pattern.empty() || rule.id.empty() || rule.severity.empty() || rule.tokenlist != tokenlist)
continue;
const char *error = nullptr;
int erroffset = 0;
pcre *re = pcre_compile(rule.pattern.c_str(),0,&error,&erroffset,nullptr);
if (!re) {
if (error) {
ErrorLogger::ErrorMessage errmsg(std::list<ErrorLogger::ErrorMessage::FileLocation>(),
Severity::error,
error,
"pcre_compile",
false);
reportErr(errmsg);
}
continue;
}
int pos = 0;
int ovector[30]= {0};
while (pos < (int)str.size() && 0 <= pcre_exec(re, nullptr, str.c_str(), (int)str.size(), pos, 0, ovector, 30)) {
const unsigned int pos1 = (unsigned int)ovector[0];
const unsigned int pos2 = (unsigned int)ovector[1];
// jump to the end of the match for the next pcre_exec
pos = (int)pos2;
// determine location..
ErrorLogger::ErrorMessage::FileLocation loc;
loc.setfile(tokenizer.list.getSourceFilePath());
loc.line = 0;
std::size_t len = 0;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next()) {
len = len + 1U + tok->str().size();
if (len > pos1) {
loc.setfile(tokenizer.list.getFiles().at(tok->fileIndex()));
loc.line = tok->linenr();
break;
}
}
const std::list<ErrorLogger::ErrorMessage::FileLocation> callStack(1, loc);
// Create error message
std::string summary;
if (rule.summary.empty())
summary = "found '" + str.substr(pos1, pos2 - pos1) + "'";
else
summary = rule.summary;
const ErrorLogger::ErrorMessage errmsg(callStack, Severity::fromString(rule.severity), summary, rule.id, false);
// Report error
reportErr(errmsg);
}
pcre_free(re);
}
#endif
}
Settings &CppCheck::settings()
{
return _settings;
}
void CppCheck::tooManyConfigsError(const std::string &file, const std::size_t numberOfConfigurations)
{
if (!_settings.isEnabled("information") && !tooManyConfigs)
return;
tooManyConfigs = false;
if (_settings.isEnabled("information") && file.empty())
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
if (!file.empty()) {
ErrorLogger::ErrorMessage::FileLocation location;
location.setfile(file);
loclist.push_back(location);
}
std::ostringstream msg;
msg << "Too many #ifdef configurations - cppcheck only checks " << _settings._maxConfigs;
if (numberOfConfigurations > _settings._maxConfigs)
msg << " of " << numberOfConfigurations << " configurations. Use --force to check all configurations.\n";
if (file.empty())
msg << " configurations. Use --force to check all configurations. For more details, use --enable=information.\n";
msg << "The checking of the file will be interrupted because there are too many "
"#ifdef configurations. Checking of all #ifdef configurations can be forced "
"by --force command line option or from GUI preferences. However that may "
"increase the checking time.";
if (file.empty())
msg << " For more details, use --enable=information.";
ErrorLogger::ErrorMessage errmsg(loclist,
Severity::information,
msg.str(),
"toomanyconfigs",
false);
reportErr(errmsg);
}
void CppCheck::purgedConfigurationMessage(const std::string &file, const std::string& configuration)
{
tooManyConfigs = false;
if (_settings.isEnabled("information") && file.empty())
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
if (!file.empty()) {
ErrorLogger::ErrorMessage::FileLocation location;
location.setfile(file);
loclist.push_back(location);
}
ErrorLogger::ErrorMessage errmsg(loclist,
Severity::information,
"The configuration '" + configuration + "' was not checked because its code equals another one.",
"purgedConfiguration",
false);
reportErr(errmsg);
}
//---------------------------------------------------------------------------
void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
{
if (!_settings.library.reportErrors(msg.file0))
return;
const std::string errmsg = msg.toString(_settings._verbose);
if (errmsg.empty())
return;
// Alert only about unique errors
if (std::find(_errorList.begin(), _errorList.end(), errmsg) != _errorList.end())
return;
if (_settings.debugFalsePositive) {
// Don't print out error
_errorList.push_back(errmsg);
return;
}
std::string file;
unsigned int line(0);
if (!msg._callStack.empty()) {
file = msg._callStack.back().getfile(false);
line = msg._callStack.back().line;
}
if (_useGlobalSuppressions) {
if (_settings.nomsg.isSuppressed(msg._id, file, line))
return;
} else {
if (_settings.nomsg.isSuppressedLocal(msg._id, file, line))
return;
}
if (!_settings.nofail.isSuppressed(msg._id, file, line))
exitcode = 1;
_errorList.push_back(errmsg);
_errorLogger.reportErr(msg);
}
void CppCheck::reportOut(const std::string &outmsg)
{
_errorLogger.reportOut(outmsg);
}
void CppCheck::reportProgress(const std::string &filename, const char stage[], const std::size_t value)
{
_errorLogger.reportProgress(filename, stage, value);
}
void CppCheck::reportInfo(const ErrorLogger::ErrorMessage &msg)
{
// Suppressing info message?
std::string file;
unsigned int line(0);
if (!msg._callStack.empty()) {
file = msg._callStack.back().getfile(false);
line = msg._callStack.back().line;
}
if (_useGlobalSuppressions) {
if (_settings.nomsg.isSuppressed(msg._id, file, line))
return;
} else {
if (_settings.nomsg.isSuppressedLocal(msg._id, file, line))
return;
}
_errorLogger.reportInfo(msg);
}
void CppCheck::reportStatus(unsigned int /*fileindex*/, unsigned int /*filecount*/, std::size_t /*sizedone*/, std::size_t /*sizetotal*/)
{
}
void CppCheck::getErrorMessages()
{
Settings s(_settings);
s.addEnabled("warning");
s.addEnabled("style");
s.addEnabled("portability");
s.addEnabled("performance");
s.addEnabled("information");
tooManyConfigs = true;
tooManyConfigsError("",0U);
// call all "getErrorMessages" in all registered Check classes
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
(*it)->getErrorMessages(this, &s);
Tokenizer::getErrorMessages(this, &s);
Preprocessor::getErrorMessages(this, &s);
}
void CppCheck::analyseWholeProgram()
{
// Analyse the tokens
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
(*it)->analyseWholeProgram(fileInfo, _settings, *this);
}
bool CppCheck::unusedFunctionCheckIsEnabled() const
{
return (_settings._jobs == 1 && _settings.isEnabled("unusedFunction"));
}
You can’t perform that action at this time.