cppcheck/cli/cppcheckexecutor.cpp at travis · napcode/cppcheck · GitHub

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* Cppcheck - A tool for static C/C++ code analysis

* 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 "standards.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 <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

#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), mShowAllErrors(false)

{

}

CppCheckExecutor::~CppCheckExecutor()

{

delete mErrorOutput;

}

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 << ErrorLogger::ErrorMessage::getXMLHeader();

cppcheck->getErrorMessages();

std::cout << ErrorLogger::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.isEnabled(Settings::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 (!pathnames.empty()) {

// Execute recursiveAddFiles() to each given file parameter

const PathMatch matcher(ignored, caseSensitive);

for (const std::string &pathname : pathnames)

FileLister::recursiveAddFiles(mFiles, Path::toNativeSeparators(pathname), mSettings->library.markupExtensions(), matcher);

}

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;

}

return true;

}

int CppCheckExecutor::check(int argc, const char* const argv[])

{

Preprocessor::missingIncludeFlag = false;

Preprocessor::missingSystemIncludeFlag = false;

CheckUnusedFunctions::clear();

CppCheck cppCheck(*this, true);

const Settings& settings = cppCheck.settings();

mSettings = &settings;

if (!parseFromArgs(&cppCheck, argc, argv)) {

return EXIT_FAILURE;

}

if (Settings::terminated()) {

return EXIT_SUCCESS;

}

if (cppCheck.settings().exceptionHandling) {

return check_wrapper(cppCheck, argc, argv);

}

return check_internal(cppCheck, argc, argv);

}

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);

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);

char output_buffer[2048]= {0};

size_t length = GetArrayLength(output_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, output_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)

typedef std::map<int, std::string> Signalmap_t;

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<ErrorLogger::ErrorMessage::FileLocation> callstack;

ErrorLogger::ErrorMessage errmsg(callstack, emptyString, Severity::information, msg, "failedToLoadCfg", false);

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<ErrorLogger::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

ErrorLogger::ErrorMessage errmsg(callstack, emptyString, Severity::information, msg+" "+details, "failedToLoadCfg", false);

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(ErrorLogger::ErrorMessage::getXMLHeader());

}

if (!settings.buildDir.empty()) {

std::list<std::string> fileNames;

for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i)

fileNames.push_back(i->first);

AnalyzerInformation::writeFilesTxt(settings.buildDir, fileNames, 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

c = 0;

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());

}

// 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.isEnabled(Settings::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.isEnabled(Settings::MISSING_INCLUDE) && (Preprocessor::missingIncludeFlag || Preprocessor::missingSystemIncludeFlag)) {

const std::list<ErrorLogger::ErrorMessage::FileLocation> callStack;

ErrorLogger::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",

false);

reportInfo(msg);

}

if (settings.xml) {

reportErr(ErrorLogger::ErrorMessage::getXMLFooter());

}

mSettings = nullptr;

if (returnValue)

return settings.exitCode;

return 0;

}

#ifdef _WIN32

// fix trac ticket #439 'Cppcheck reports wrong filename for filenames containing 8-bit ASCII'

static inline std::string ansiToOEM(const std::string &msg, bool doConvert)

{

if (doConvert) {

const unsigned msglength = msg.length();

// convert ANSI strings to OEM strings in two steps

std::vector<WCHAR> wcContainer(msglength);

std::string result(msglength, '\0');

// ansi code page characters to wide characters

MultiByteToWideChar(CP_ACP, 0, msg.data(), msglength, wcContainer.data(), msglength);

// wide characters to oem codepage characters

WideCharToMultiByte(CP_OEMCP, 0, wcContainer.data(), msglength, const_cast<char *>(result.data()), msglength, nullptr, nullptr);

return result; // hope for return value optimization

}

return msg;

}

#else

// no performance regression on non-windows systems

#define ansiToOEM(msg, doConvert) (msg)

#endif

void CppCheckExecutor::reportErr(const std::string &errmsg)

{

// Alert only about unique errors

if (mShownErrors.find(errmsg) != mShownErrors.end())

return;

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