forked from danmar/cppcheck
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcppcheckexecutor.cpp
More file actions
1209 lines (1113 loc) · 44.8 KB
/
cppcheckexecutor.cpp
File metadata and controls
1209 lines (1113 loc) · 44.8 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
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* 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/>.
*/
#include "cppcheckexecutor.h"
#include "analyzerinfo.h"
#include "cmdlineparser.h"
#include "config.h"
#include "cppcheck.h"
#include "filelister.h"
#include "importproject.h"
#include "library.h"
#include "path.h"
#include "pathmatch.h"
#include "preprocessor.h"
#include "settings.h"
#include "suppressions.h"
#include "threadexecutor.h"
#include "utils.h"
#include "checkunusedfunctions.h"
#include <csignal>
#include <cstdio>
#include <cstdlib> // EXIT_SUCCESS and EXIT_FAILURE
#include <cstring>
#include <iostream>
#include <list>
#include <memory>
#include <utility>
#include <vector>
#if !defined(NO_UNIX_SIGNAL_HANDLING) && defined(__GNUC__) && !defined(__MINGW32__) && !defined(__OS2__)
#define USE_UNIX_SIGNAL_HANDLING
#include <unistd.h>
#if defined(__APPLE__)
# define _XOPEN_SOURCE // ucontext.h APIs can only be used on Mac OSX >= 10.7 if _XOPEN_SOURCE is defined
# include <ucontext.h>
# undef _XOPEN_SOURCE
#elif !defined(__OpenBSD__)
# include <ucontext.h>
#endif
#ifdef __linux__
#include <sys/syscall.h>
#include <sys/types.h>
#endif
#endif
#if !defined(NO_UNIX_BACKTRACE_SUPPORT) && defined(USE_UNIX_SIGNAL_HANDLING) && defined(__GNUC__) && defined(__GLIBC__) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__NetBSD__) && !defined(__SVR4) && !defined(__QNX__)
#define USE_UNIX_BACKTRACE_SUPPORT
#include <cxxabi.h>
#include <execinfo.h>
#endif
#if defined(_MSC_VER)
#define USE_WINDOWS_SEH
#include <DbgHelp.h>
#include <TCHAR.H>
#include <Windows.h>
#include <excpt.h>
#endif
/*static*/ FILE* CppCheckExecutor::mExceptionOutput = stdout;
CppCheckExecutor::CppCheckExecutor()
: mSettings(nullptr), mLatestProgressOutputTime(0), mErrorOutput(nullptr), mBugHuntingReport(nullptr), mShowAllErrors(false)
{
}
CppCheckExecutor::~CppCheckExecutor()
{
delete mErrorOutput;
delete mBugHuntingReport;
}
bool CppCheckExecutor::parseFromArgs(CppCheck *cppcheck, int argc, const char* const argv[])
{
Settings& settings = cppcheck->settings();
CmdLineParser parser(&settings);
const bool success = parser.parseFromArgs(argc, argv);
if (success) {
if (parser.getShowVersion() && !parser.getShowErrorMessages()) {
const char * const extraVersion = CppCheck::extraVersion();
if (*extraVersion != 0)
std::cout << "Cppcheck " << CppCheck::version() << " ("
<< extraVersion << ')' << std::endl;
else
std::cout << "Cppcheck " << CppCheck::version() << std::endl;
}
if (parser.getShowErrorMessages()) {
mShowAllErrors = true;
std::cout << ErrorMessage::getXMLHeader();
cppcheck->getErrorMessages();
std::cout << ErrorMessage::getXMLFooter() << std::endl;
}
if (parser.exitAfterPrinting()) {
Settings::terminate();
return true;
}
} else {
return false;
}
// Check that all include paths exist
{
for (std::list<std::string>::iterator iter = settings.includePaths.begin();
iter != settings.includePaths.end();
) {
const std::string path(Path::toNativeSeparators(*iter));
if (FileLister::isDirectory(path))
++iter;
else {
// If the include path is not found, warn user and remove the non-existing path from the list.
if (settings.severity.isEnabled(Severity::information))
std::cout << "(information) Couldn't find path given by -I '" << path << '\'' << std::endl;
iter = settings.includePaths.erase(iter);
}
}
}
// Output a warning for the user if he tries to exclude headers
bool warn = false;
const std::vector<std::string>& ignored = parser.getIgnoredPaths();
for (const std::string &i : ignored) {
if (Path::isHeader(i)) {
warn = true;
break;
}
}
if (warn) {
std::cout << "cppcheck: filename exclusion does not apply to header (.h and .hpp) files." << std::endl;
std::cout << "cppcheck: Please use --suppress for ignoring results from the header files." << std::endl;
}
const std::vector<std::string>& pathnames = parser.getPathNames();
#if defined(_WIN32)
// For Windows we want case-insensitive path matching
const bool caseSensitive = false;
#else
const bool caseSensitive = true;
#endif
if (!mSettings->project.fileSettings.empty() && !mSettings->fileFilter.empty()) {
// filter only for the selected filenames from all project files
std::list<ImportProject::FileSettings> newList;
for (const ImportProject::FileSettings &fsetting : settings.project.fileSettings) {
if (matchglob(mSettings->fileFilter, fsetting.filename)) {
newList.emplace_back(fsetting);
}
}
if (!newList.empty())
settings.project.fileSettings = newList;
else {
std::cout << "cppcheck: error: could not find any files matching the filter." << std::endl;
return false;
}
} else if (!pathnames.empty()) {
// Execute recursiveAddFiles() to each given file parameter
const PathMatch matcher(ignored, caseSensitive);
for (const std::string &pathname : pathnames) {
std::string err = FileLister::recursiveAddFiles(mFiles, Path::toNativeSeparators(pathname), mSettings->library.markupExtensions(), matcher);
if (!err.empty()) {
std::cout << "cppcheck: " << err << std::endl;
}
}
}
if (mFiles.empty() && settings.project.fileSettings.empty()) {
std::cout << "cppcheck: error: could not find or open any of the paths given." << std::endl;
if (!ignored.empty())
std::cout << "cppcheck: Maybe all paths were ignored?" << std::endl;
return false;
} else if (!mSettings->fileFilter.empty() && settings.project.fileSettings.empty()) {
std::map<std::string, std::size_t> newMap;
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i)
if (matchglob(mSettings->fileFilter, i->first)) {
newMap[i->first] = i->second;
}
mFiles = newMap;
if (mFiles.empty()) {
std::cout << "cppcheck: error: could not find any files matching the filter." << std::endl;
return false;
}
}
return true;
}
int CppCheckExecutor::check(int argc, const char* const argv[])
{
Preprocessor::missingIncludeFlag = false;
Preprocessor::missingSystemIncludeFlag = false;
CheckUnusedFunctions::clear();
CppCheck cppCheck(*this, true, executeCommand);
const Settings& settings = cppCheck.settings();
mSettings = &settings;
if (!parseFromArgs(&cppCheck, argc, argv)) {
mSettings = nullptr;
return EXIT_FAILURE;
}
if (Settings::terminated()) {
mSettings = nullptr;
return EXIT_SUCCESS;
}
int ret;
if (cppCheck.settings().exceptionHandling)
ret = check_wrapper(cppCheck, argc, argv);
else
ret = check_internal(cppCheck, argc, argv);
mSettings = nullptr;
return ret;
}
void CppCheckExecutor::setSettings(const Settings &settings)
{
mSettings = &settings;
}
/**
* Simple helper function:
* \return size of array
* */
template<typename T, int size>
std::size_t getArrayLength(const T(&)[size])
{
return size;
}
#if defined(USE_UNIX_SIGNAL_HANDLING)
/*
* Try to print the callstack.
* That is very sensitive to the operating system, hardware, compiler and runtime.
* The code is not meant for production environment!
* One reason is named first: it's using functions not whitelisted for usage in a signal handler function.
*/
static void print_stacktrace(FILE* output, bool demangling, int maxdepth, bool lowMem)
{
#if defined(USE_UNIX_BACKTRACE_SUPPORT)
// 32 vs. 64bit
#define ADDRESSDISPLAYLENGTH ((sizeof(long)==8)?12:8)
const int fd = fileno(output);
void *callstackArray[32]= {nullptr}; // the less resources the better...
const int currentdepth = backtrace(callstackArray, (int)getArrayLength(callstackArray));
const int offset=2; // some entries on top are within our own exception handling code or libc
if (maxdepth<0)
maxdepth=currentdepth-offset;
else
maxdepth = std::min(maxdepth, currentdepth);
if (lowMem) {
fputs("Callstack (symbols only):\n", output);
backtrace_symbols_fd(callstackArray+offset, maxdepth, fd);
} else {
char **symbolStringList = backtrace_symbols(callstackArray, currentdepth);
if (symbolStringList) {
fputs("Callstack:\n", output);
char demangle_buffer[2048]= {0};
for (int i = offset; i < maxdepth; ++i) {
const char * const symbolString = symbolStringList[i];
char * realnameString = nullptr;
const char * const firstBracketName = strchr(symbolString, '(');
const char * const firstBracketAddress = strchr(symbolString, '[');
const char * const secondBracketAddress = strchr(firstBracketAddress, ']');
const char * const beginAddress = firstBracketAddress+3;
const int addressLen = int(secondBracketAddress-beginAddress);
const int padLen = int(ADDRESSDISPLAYLENGTH-addressLen);
if (demangling && firstBracketName) {
const char * const plus = strchr(firstBracketName, '+');
if (plus && (plus>(firstBracketName+1))) {
char input_buffer[1024]= {0};
strncpy(input_buffer, firstBracketName+1, plus-firstBracketName-1);
size_t length = getArrayLength(demangle_buffer);
int status=0;
// We're violating the specification - passing stack address instead of malloc'ed heap.
// Benefit is that no further heap is required, while there is sufficient stack...
realnameString = abi::__cxa_demangle(input_buffer, demangle_buffer, &length, &status); // non-NULL on success
}
}
const int ordinal=i-offset;
fprintf(output, "#%-2d 0x",
ordinal);
if (padLen>0)
fprintf(output, "%0*d",
padLen, 0);
if (realnameString) {
fprintf(output, "%.*s in %s\n",
(int)(secondBracketAddress-firstBracketAddress-3), firstBracketAddress+3,
realnameString);
} else {
fprintf(output, "%.*s in %.*s\n",
(int)(secondBracketAddress-firstBracketAddress-3), firstBracketAddress+3,
(int)(firstBracketAddress-symbolString), symbolString);
}
}
free(symbolStringList);
} else {
fputs("Callstack could not be obtained\n", output);
}
}
#undef ADDRESSDISPLAYLENGTH
#else
UNUSED(output);
UNUSED(demangling);
UNUSED(maxdepth);
UNUSED(lowMem);
#endif
}
static const size_t MYSTACKSIZE = 16*1024+SIGSTKSZ; // wild guess about a reasonable buffer
static char mytstack[MYSTACKSIZE]= {0}; // alternative stack for signal handler
static bool bStackBelowHeap=false; // lame attempt to locate heap vs. stack address space. See CppCheckExecutor::check_wrapper()
/**
* \param[in] ptr address to be examined.
* \return true if address is supposed to be on stack (contrary to heap). If ptr is 0 false will be returned.
* If unknown better return false.
*/
static bool IsAddressOnStack(const void* ptr)
{
if (nullptr==ptr)
return false;
char a;
if (bStackBelowHeap)
return ptr < &a;
else
return ptr > &a;
}
/* (declare this list here, so it may be used in signal handlers in addition to main())
* A list of signals available in ISO C
* Check out http://pubs.opengroup.org/onlinepubs/009695399/basedefs/signal.h.html
* For now we only want to detect abnormal behaviour for a few selected signals:
*/
#define DECLARE_SIGNAL(x) std::make_pair(x, #x)
using Signalmap_t = std::map<int, std::string>;
static const Signalmap_t listofsignals = {
DECLARE_SIGNAL(SIGABRT),
DECLARE_SIGNAL(SIGBUS),
DECLARE_SIGNAL(SIGFPE),
DECLARE_SIGNAL(SIGILL),
DECLARE_SIGNAL(SIGINT),
DECLARE_SIGNAL(SIGQUIT),
DECLARE_SIGNAL(SIGSEGV),
DECLARE_SIGNAL(SIGSYS),
// don't care: SIGTERM
DECLARE_SIGNAL(SIGUSR1),
//DECLARE_SIGNAL(SIGUSR2) no usage currently
};
#undef DECLARE_SIGNAL
/*
* Entry pointer for signal handlers
* It uses functions which are not safe to be called from a signal handler,
* (http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04 has a whitelist)
* but when ending up here something went terribly wrong anyway.
* And all which is left is just printing some information and terminate.
*/
static void CppcheckSignalHandler(int signo, siginfo_t * info, void * context)
{
int type = -1;
pid_t killid;
#if defined(__linux__) && defined(REG_ERR)
const ucontext_t* const uc = reinterpret_cast<const ucontext_t*>(context);
killid = (pid_t) syscall(SYS_gettid);
if (uc) {
type = (int)uc->uc_mcontext.gregs[REG_ERR] & 2;
}
#else
UNUSED(context);
killid = getpid();
#endif
const Signalmap_t::const_iterator it=listofsignals.find(signo);
const char * const signame = (it==listofsignals.end()) ? "unknown" : it->second.c_str();
bool printCallstack=true; // try to print a callstack?
bool lowMem=false; // was low-memory condition detected? Be careful then! Avoid allocating much more memory then.
bool unexpectedSignal=true; // unexpected indicates program failure
bool terminate=true; // exit process/thread
const bool isAddressOnStack = IsAddressOnStack(info->si_addr);
FILE* output = CppCheckExecutor::getExceptionOutput();
switch (signo) {
case SIGABRT:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
fputs(
#ifdef NDEBUG
" - out of memory?\n",
#else
" - out of memory or assertion?\n",
#endif
output);
lowMem=true; // educated guess
break;
case SIGBUS:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
switch (info->si_code) {
case BUS_ADRALN: // invalid address alignment
fputs(" - BUS_ADRALN", output);
break;
case BUS_ADRERR: // nonexistent physical address
fputs(" - BUS_ADRERR", output);
break;
case BUS_OBJERR: // object-specific hardware error
fputs(" - BUS_OBJERR", output);
break;
#ifdef BUS_MCEERR_AR
case BUS_MCEERR_AR: // Hardware memory error consumed on a machine check;
fputs(" - BUS_MCEERR_AR", output);
break;
#endif
#ifdef BUS_MCEERR_AO
case BUS_MCEERR_AO: // Hardware memory error detected in process but not consumed
fputs(" - BUS_MCEERR_AO", output);
break;
#endif
default:
break;
}
fprintf(output, " (at 0x%lx).\n",
(unsigned long)info->si_addr);
break;
case SIGFPE:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
switch (info->si_code) {
case FPE_INTDIV: // integer divide by zero
fputs(" - FPE_INTDIV", output);
break;
case FPE_INTOVF: // integer overflow
fputs(" - FPE_INTOVF", output);
break;
case FPE_FLTDIV: // floating-point divide by zero
fputs(" - FPE_FLTDIV", output);
break;
case FPE_FLTOVF: // floating-point overflow
fputs(" - FPE_FLTOVF", output);
break;
case FPE_FLTUND: // floating-point underflow
fputs(" - FPE_FLTUND", output);
break;
case FPE_FLTRES: // floating-point inexact result
fputs(" - FPE_FLTRES", output);
break;
case FPE_FLTINV: // floating-point invalid operation
fputs(" - FPE_FLTINV", output);
break;
case FPE_FLTSUB: // subscript out of range
fputs(" - FPE_FLTSUB", output);
break;
default:
break;
}
fprintf(output, " (at 0x%lx).\n",
(unsigned long)info->si_addr);
break;
case SIGILL:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
switch (info->si_code) {
case ILL_ILLOPC: // illegal opcode
fputs(" - ILL_ILLOPC", output);
break;
case ILL_ILLOPN: // illegal operand
fputs(" - ILL_ILLOPN", output);
break;
case ILL_ILLADR: // illegal addressing mode
fputs(" - ILL_ILLADR", output);
break;
case ILL_ILLTRP: // illegal trap
fputs(" - ILL_ILLTRP", output);
break;
case ILL_PRVOPC: // privileged opcode
fputs(" - ILL_PRVOPC", output);
break;
case ILL_PRVREG: // privileged register
fputs(" - ILL_PRVREG", output);
break;
case ILL_COPROC: // coprocessor error
fputs(" - ILL_COPROC", output);
break;
case ILL_BADSTK: // internal stack error
fputs(" - ILL_BADSTK", output);
break;
default:
break;
}
fprintf(output, " (at 0x%lx).%s\n",
(unsigned long)info->si_addr,
(isAddressOnStack)?" Stackoverflow?":"");
break;
case SIGINT:
unexpectedSignal=false; // legal usage: interrupt application via CTRL-C
fputs("cppcheck received signal ", output);
fputs(signame, output);
printCallstack=true;
fputs(".\n", output);
break;
case SIGSEGV:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
switch (info->si_code) {
case SEGV_MAPERR: // address not mapped to object
fputs(" - SEGV_MAPERR", output);
break;
case SEGV_ACCERR: // invalid permissions for mapped object
fputs(" - SEGV_ACCERR", output);
break;
default:
break;
}
fprintf(output, " (%sat 0x%lx).%s\n",
// cppcheck-suppress knownConditionTrueFalse ; FP
(type==-1)? "" :
(type==0) ? "reading " : "writing ",
(unsigned long)info->si_addr,
(isAddressOnStack)?" Stackoverflow?":""
);
break;
case SIGUSR1:
fputs("cppcheck received signal ", output);
fputs(signame, output);
fputs(".\n", output);
terminate=false;
break;
default:
fputs("Internal error: cppcheck received signal ", output);
fputs(signame, output);
fputs(".\n", output);
break;
}
if (printCallstack) {
print_stacktrace(output, true, -1, lowMem);
}
if (unexpectedSignal) {
fputs("\nPlease report this to the cppcheck developers!\n", output);
}
fflush(output);
if (terminate) {
// now let things proceed, shutdown and hopefully dump core for post-mortem analysis
struct sigaction act;
memset(&act, 0, sizeof(act));
act.sa_handler=SIG_DFL;
sigaction(signo, &act, nullptr);
kill(killid, signo);
}
}
#endif
#ifdef USE_WINDOWS_SEH
namespace {
const ULONG maxnamelength = 512;
struct IMAGEHLP_SYMBOL64_EXT : public IMAGEHLP_SYMBOL64 {
TCHAR nameExt[maxnamelength]; // actually no need to worry about character encoding here
};
typedef BOOL (WINAPI *fpStackWalk64)(DWORD, HANDLE, HANDLE, LPSTACKFRAME64, PVOID, PREAD_PROCESS_MEMORY_ROUTINE64, PFUNCTION_TABLE_ACCESS_ROUTINE64, PGET_MODULE_BASE_ROUTINE64, PTRANSLATE_ADDRESS_ROUTINE64);
fpStackWalk64 pStackWalk64;
typedef DWORD64(WINAPI *fpSymGetModuleBase64)(HANDLE, DWORD64);
fpSymGetModuleBase64 pSymGetModuleBase64;
typedef BOOL (WINAPI *fpSymGetSymFromAddr64)(HANDLE, DWORD64, PDWORD64, PIMAGEHLP_SYMBOL64);
fpSymGetSymFromAddr64 pSymGetSymFromAddr64;
typedef BOOL (WINAPI *fpSymGetLineFromAddr64)(HANDLE, DWORD64, PDWORD, PIMAGEHLP_LINE64);
fpSymGetLineFromAddr64 pSymGetLineFromAddr64;
typedef DWORD (WINAPI *fpUnDecorateSymbolName)(const TCHAR*, PTSTR, DWORD, DWORD) ;
fpUnDecorateSymbolName pUnDecorateSymbolName;
typedef PVOID(WINAPI *fpSymFunctionTableAccess64)(HANDLE, DWORD64);
fpSymFunctionTableAccess64 pSymFunctionTableAccess64;
typedef BOOL (WINAPI *fpSymInitialize)(HANDLE, PCSTR, BOOL);
fpSymInitialize pSymInitialize;
HMODULE hLibDbgHelp;
// avoid explicit dependency on Dbghelp.dll
bool loadDbgHelp()
{
hLibDbgHelp = ::LoadLibraryW(L"Dbghelp.dll");
if (!hLibDbgHelp)
return false;
pStackWalk64 = (fpStackWalk64) ::GetProcAddress(hLibDbgHelp, "StackWalk64");
pSymGetModuleBase64 = (fpSymGetModuleBase64) ::GetProcAddress(hLibDbgHelp, "SymGetModuleBase64");
pSymGetSymFromAddr64 = (fpSymGetSymFromAddr64) ::GetProcAddress(hLibDbgHelp, "SymGetSymFromAddr64");
pSymGetLineFromAddr64 = (fpSymGetLineFromAddr64)::GetProcAddress(hLibDbgHelp, "SymGetLineFromAddr64");
pSymFunctionTableAccess64 = (fpSymFunctionTableAccess64)::GetProcAddress(hLibDbgHelp, "SymFunctionTableAccess64");
pSymInitialize = (fpSymInitialize) ::GetProcAddress(hLibDbgHelp, "SymInitialize");
pUnDecorateSymbolName = (fpUnDecorateSymbolName)::GetProcAddress(hLibDbgHelp, "UnDecorateSymbolName");
return true;
}
void printCallstack(FILE* outputFile, PEXCEPTION_POINTERS ex)
{
if (!loadDbgHelp())
return;
const HANDLE hProcess = GetCurrentProcess();
const HANDLE hThread = GetCurrentThread();
pSymInitialize(
hProcess,
nullptr,
TRUE
);
CONTEXT context = *(ex->ContextRecord);
STACKFRAME64 stack= {0};
#ifdef _M_IX86
stack.AddrPC.Offset = context.Eip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Esp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Ebp;
stack.AddrFrame.Mode = AddrModeFlat;
#else
stack.AddrPC.Offset = context.Rip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Rsp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Rsp;
stack.AddrFrame.Mode = AddrModeFlat;
#endif
IMAGEHLP_SYMBOL64_EXT symbol;
symbol.SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
symbol.MaxNameLength = maxnamelength;
DWORD64 displacement = 0;
int beyond_main=-1; // emergency exit, see below
for (ULONG frame = 0; ; frame++) {
BOOL result = pStackWalk64
(
#ifdef _M_IX86
IMAGE_FILE_MACHINE_I386,
#else
IMAGE_FILE_MACHINE_AMD64,
#endif
hProcess,
hThread,
&stack,
&context,
nullptr,
pSymFunctionTableAccess64,
pSymGetModuleBase64,
nullptr
);
if (!result) // official end...
break;
pSymGetSymFromAddr64(hProcess, (ULONG64)stack.AddrPC.Offset, &displacement, &symbol);
TCHAR undname[maxnamelength]= {0};
pUnDecorateSymbolName((const TCHAR*)symbol.Name, (PTSTR)undname, (DWORD)getArrayLength(undname), UNDNAME_COMPLETE);
if (beyond_main>=0)
++beyond_main;
if (_tcscmp(undname, _T("main"))==0)
beyond_main=0;
fprintf(outputFile,
"%lu. 0x%08I64X in ",
frame, (ULONG64)stack.AddrPC.Offset);
fputs((const char *)undname, outputFile);
fputc('\n', outputFile);
if (0==stack.AddrReturn.Offset || beyond_main>2) // StackWalk64() sometimes doesn't reach any end...
break;
}
FreeLibrary(hLibDbgHelp);
hLibDbgHelp=nullptr;
}
void writeMemoryErrorDetails(FILE* outputFile, PEXCEPTION_POINTERS ex, const char* description)
{
fputs(description, outputFile);
fprintf(outputFile, " (instruction: 0x%p) ", ex->ExceptionRecord->ExceptionAddress);
// Using %p for ULONG_PTR later on, so it must have size identical to size of pointer
// This is not the universally portable solution but good enough for Win32/64
C_ASSERT(sizeof(void*) == sizeof(ex->ExceptionRecord->ExceptionInformation[1]));
switch (ex->ExceptionRecord->ExceptionInformation[0]) {
case 0:
fprintf(outputFile, "reading from 0x%p",
reinterpret_cast<void*>(ex->ExceptionRecord->ExceptionInformation[1]));
break;
case 1:
fprintf(outputFile, "writing to 0x%p",
reinterpret_cast<void*>(ex->ExceptionRecord->ExceptionInformation[1]));
break;
case 8:
fprintf(outputFile, "data execution prevention at 0x%p",
reinterpret_cast<void*>(ex->ExceptionRecord->ExceptionInformation[1]));
break;
default:
break;
}
}
/*
* Any evaluation of the exception needs to be done here!
*/
int filterException(int code, PEXCEPTION_POINTERS ex)
{
FILE *outputFile = stdout;
fputs("Internal error: ", outputFile);
switch (ex->ExceptionRecord->ExceptionCode) {
case EXCEPTION_ACCESS_VIOLATION:
writeMemoryErrorDetails(outputFile, ex, "Access violation");
break;
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
fputs("Out of array bounds", outputFile);
break;
case EXCEPTION_BREAKPOINT:
fputs("Breakpoint", outputFile);
break;
case EXCEPTION_DATATYPE_MISALIGNMENT:
fputs("Misaligned data", outputFile);
break;
case EXCEPTION_FLT_DENORMAL_OPERAND:
fputs("Denormalized floating-point value", outputFile);
break;
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
fputs("Floating-point divide-by-zero", outputFile);
break;
case EXCEPTION_FLT_INEXACT_RESULT:
fputs("Inexact floating-point value", outputFile);
break;
case EXCEPTION_FLT_INVALID_OPERATION:
fputs("Invalid floating-point operation", outputFile);
break;
case EXCEPTION_FLT_OVERFLOW:
fputs("Floating-point overflow", outputFile);
break;
case EXCEPTION_FLT_STACK_CHECK:
fputs("Floating-point stack overflow", outputFile);
break;
case EXCEPTION_FLT_UNDERFLOW:
fputs("Floating-point underflow", outputFile);
break;
case EXCEPTION_GUARD_PAGE:
fputs("Page-guard access", outputFile);
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
fputs("Illegal instruction", outputFile);
break;
case EXCEPTION_IN_PAGE_ERROR:
writeMemoryErrorDetails(outputFile, ex, "Invalid page access");
break;
case EXCEPTION_INT_DIVIDE_BY_ZERO:
fputs("Integer divide-by-zero", outputFile);
break;
case EXCEPTION_INT_OVERFLOW:
fputs("Integer overflow", outputFile);
break;
case EXCEPTION_INVALID_DISPOSITION:
fputs("Invalid exception dispatcher", outputFile);
break;
case EXCEPTION_INVALID_HANDLE:
fputs("Invalid handle", outputFile);
break;
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
fputs("Non-continuable exception", outputFile);
break;
case EXCEPTION_PRIV_INSTRUCTION:
fputs("Invalid instruction", outputFile);
break;
case EXCEPTION_SINGLE_STEP:
fputs("Single instruction step", outputFile);
break;
case EXCEPTION_STACK_OVERFLOW:
fputs("Stack overflow", outputFile);
break;
default:
fprintf(outputFile, "Unknown exception (%d)\n",
code);
break;
}
fputc('\n', outputFile);
printCallstack(outputFile, ex);
fflush(outputFile);
return EXCEPTION_EXECUTE_HANDLER;
}
}
#endif
/**
* Signal/SEH handling
* Has to be clean for using with SEH on windows, i.e. no construction of C++ object instances is allowed!
* TODO Check for multi-threading issues!
*
*/
int CppCheckExecutor::check_wrapper(CppCheck& cppcheck, int argc, const char* const argv[])
{
#ifdef USE_WINDOWS_SEH
FILE *outputFile = stdout;
__try {
return check_internal(cppcheck, argc, argv);
} __except (filterException(GetExceptionCode(), GetExceptionInformation())) {
// reporting to stdout may not be helpful within a GUI application...
fputs("Please report this to the cppcheck developers!\n", outputFile);
return -1;
}
#elif defined(USE_UNIX_SIGNAL_HANDLING)
// determine stack vs. heap
char stackVariable;
char *heapVariable=(char*)malloc(1);
bStackBelowHeap = &stackVariable < heapVariable;
free(heapVariable);
// set up alternative stack for signal handler
stack_t segv_stack;
segv_stack.ss_sp = mytstack;
segv_stack.ss_flags = 0;
segv_stack.ss_size = MYSTACKSIZE;
sigaltstack(&segv_stack, nullptr);
// install signal handler
struct sigaction act;
memset(&act, 0, sizeof(act));
act.sa_flags=SA_SIGINFO|SA_ONSTACK;
act.sa_sigaction=CppcheckSignalHandler;
for (std::map<int, std::string>::const_iterator sig=listofsignals.begin(); sig!=listofsignals.end(); ++sig) {
sigaction(sig->first, &act, nullptr);
}
return check_internal(cppcheck, argc, argv);
#else
return check_internal(cppcheck, argc, argv);
#endif
}
/*
* That is a method which gets called from check_wrapper
* */
int CppCheckExecutor::check_internal(CppCheck& cppcheck, int /*argc*/, const char* const argv[])
{
Settings& settings = cppcheck.settings();
mSettings = &settings;
const bool std = tryLoadLibrary(settings.library, argv[0], "std.cfg");
for (const std::string &lib : settings.libraries) {
if (!tryLoadLibrary(settings.library, argv[0], lib.c_str())) {
const std::string msg("Failed to load the library " + lib);
const std::list<ErrorMessage::FileLocation> callstack;
ErrorMessage errmsg(callstack, emptyString, Severity::information, msg, "failedToLoadCfg", Certainty::normal);
reportErr(errmsg);
return EXIT_FAILURE;
}
}
bool posix = true;
if (settings.posix())
posix = tryLoadLibrary(settings.library, argv[0], "posix.cfg");
bool windows = true;
if (settings.isWindowsPlatform())
windows = tryLoadLibrary(settings.library, argv[0], "windows.cfg");
if (!std || !posix || !windows) {
const std::list<ErrorMessage::FileLocation> callstack;
const std::string msg("Failed to load " + std::string(!std ? "std.cfg" : !posix ? "posix.cfg" : "windows.cfg") + ". Your Cppcheck installation is broken, please re-install.");
#ifdef FILESDIR
const std::string details("The Cppcheck binary was compiled with FILESDIR set to \""
FILESDIR "\" and will therefore search for "
"std.cfg in " FILESDIR "/cfg.");
#else
const std::string cfgfolder(Path::fromNativeSeparators(Path::getPathFromFilename(argv[0])) + "cfg");
const std::string details("The Cppcheck binary was compiled without FILESDIR set. Either the "
"std.cfg should be available in " + cfgfolder + " or the FILESDIR "
"should be configured.");
#endif
ErrorMessage errmsg(callstack, emptyString, Severity::information, msg+" "+details, "failedToLoadCfg", Certainty::normal);
reportErr(errmsg);
return EXIT_FAILURE;
}
if (settings.reportProgress)
mLatestProgressOutputTime = std::time(nullptr);
if (!settings.outputFile.empty()) {
mErrorOutput = new std::ofstream(settings.outputFile);
}
if (settings.xml) {
reportErr(ErrorMessage::getXMLHeader());
}
if (!settings.buildDir.empty()) {
settings.loadSummaries();
std::list<std::string> fileNames;
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i)
fileNames.emplace_back(i->first);
AnalyzerInformation::writeFilesTxt(settings.buildDir, fileNames, settings.userDefines, settings.project.fileSettings);
}
unsigned int returnValue = 0;
if (settings.jobs == 1) {
// Single process
settings.jointSuppressionReport = true;
std::size_t totalfilesize = 0;
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
totalfilesize += i->second;
}
std::size_t processedsize = 0;
unsigned int c = 0;
if (settings.project.fileSettings.empty()) {
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
if (!mSettings->library.markupFile(i->first)
|| !mSettings->library.processMarkupAfterCode(i->first)) {
returnValue += cppcheck.check(i->first);
processedsize += i->second;
if (!settings.quiet)
reportStatus(c + 1, mFiles.size(), processedsize, totalfilesize);
c++;
}
}
} else {
// filesettings
// check all files of the project
for (const ImportProject::FileSettings &fs : settings.project.fileSettings) {
returnValue += cppcheck.check(fs);
++c;
if (!settings.quiet)
reportStatus(c, settings.project.fileSettings.size(), c, settings.project.fileSettings.size());
if (settings.clangTidy)
cppcheck.analyseClangTidy(fs);
}
}
// second loop to parse all markup files which may not work until all
// c/cpp files have been parsed and checked
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
if (mSettings->library.markupFile(i->first) && mSettings->library.processMarkupAfterCode(i->first)) {
returnValue += cppcheck.check(i->first);
processedsize += i->second;
if (!settings.quiet)
reportStatus(c + 1, mFiles.size(), processedsize, totalfilesize);
c++;
}
}
if (cppcheck.analyseWholeProgram())
returnValue++;
} else if (!ThreadExecutor::isEnabled()) {
std::cout << "No thread support yet implemented for this platform." << std::endl;
} else {
// Multiple processes
ThreadExecutor executor(mFiles, settings, *this);
returnValue = executor.check();
}
cppcheck.analyseWholeProgram(mSettings->buildDir, mFiles);
if (settings.severity.isEnabled(Severity::information) || settings.checkConfiguration) {
const bool enableUnusedFunctionCheck = cppcheck.isUnusedFunctionCheckEnabled();
if (settings.jointSuppressionReport) {
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
const bool err = reportUnmatchedSuppressions(settings.nomsg.getUnmatchedLocalSuppressions(i->first, enableUnusedFunctionCheck));
if (err && returnValue == 0)
returnValue = settings.exitCode;
}
}
const bool err = reportUnmatchedSuppressions(settings.nomsg.getUnmatchedGlobalSuppressions(enableUnusedFunctionCheck));
if (err && returnValue == 0)
returnValue = settings.exitCode;
}
if (!settings.checkConfiguration) {
cppcheck.tooManyConfigsError("",0U);
if (settings.checks.isEnabled(Checks::missingInclude) && (Preprocessor::missingIncludeFlag || Preprocessor::missingSystemIncludeFlag)) {
const std::list<ErrorMessage::FileLocation> callStack;
ErrorMessage msg(callStack,
emptyString,
Severity::information,
"Cppcheck cannot find all the include files (use --check-config for details)\n"
"Cppcheck cannot find all the include files. Cppcheck can check the code without the "
"include files found. But the results will probably be more accurate if all the include "
"files are found. Please check your project's include directories and add all of them "
"as include directories for Cppcheck. To see what files Cppcheck cannot find use "
"--check-config.",
Preprocessor::missingIncludeFlag ? "missingInclude" : "missingIncludeSystem",