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1204 lines (1109 loc) · 44.6 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2020 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.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 (!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)
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;
} 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", 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<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", 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(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.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<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",
false);
reportInfo(msg);
}
}
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