/* Derived from source code of TrueCrypt 7.1a, which is Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed by the TrueCrypt License 3.0. Modifications and additions to the original source code (contained in this file) and all other portions of this file are Copyright (c) 2013-2016 IDRIX and are governed by the Apache License 2.0 the full text of which is contained in the file License.txt included in VeraCrypt binary and source code distribution packages. */ #include "System.h" #include <wx/stackwalk.h> #include "Main.h" #include "Application.h" #include "UserInterface.h" #include "GraphicUserInterface.h" #include "Volume/Crc32.h" #ifdef TC_UNIX #include <signal.h> #endif #ifdef TC_MACOSX # include <sys/ucontext.h> #elif defined (TC_BSD) # include <ucontext.h> #endif #include "FatalErrorHandler.h" namespace VeraCrypt { static terminate_handler DefaultTerminateHandler; struct FatalErrorReport { bool UnhandledException; }; #ifdef TC_UNIX static void OnFatalProgramErrorSignal (int, siginfo_t *signalInfo, void *contextArg) { TC_UNUSED_VAR ucontext_t *context = (ucontext_t *) contextArg; uint64 faultingInstructionAddress = 0; #ifdef TC_LINUX # ifdef REG_EIP faultingInstructionAddress = context->uc_mcontext.gregs[REG_EIP]; # elif defined (REG_RIP) faultingInstructionAddress = context->uc_mcontext.gregs[REG_RIP]; # endif #elif defined (TC_MACOSX) # ifdef __x86_64__ faultingInstructionAddress = context->uc_mcontext->__ss.__rip; # else faultingInstructionAddress = context->uc_mcontext->__ss.__eip; # endif #endif wstringstream vars; vars << L"cpus=" << wxThread::GetCPUCount(); vars << L"&cksum=" << hex << FatalErrorHandler::GetAppChecksum() << dec; vars << L"&err=" << signalInfo->si_signo; vars << L"&addr=" << hex << faultingInstructionAddress << dec; vars << FatalErrorHandler::GetCallStack (16); wxString url = Gui->GetHomepageLinkURL (L"err-report", true, vars.str()); url.Replace (L"=0x", L"="); url.Replace (L"=0X0x", L"=0x"); url.Replace (L"=0X", L"=0x"); wxString msg = L"A critical error has occurred and VeraCrypt must be terminated. If this is caused by a bug in VeraCrypt, we would like to fix it. To help us, you can send us an automatically generated error report containing the following items:\n\n- Program version\n- Operating system version\n- Hardware architecture\n- Checksum of VeraCrypt executable\n- Error category\n- Error address\n"; #if wxUSE_STACKWALKER == 1 msg += L"- VeraCrypt call stack\n"; #endif msg += L"\nIf you select 'Yes', the following URL (which contains the entire error report) will be opened in your default Internet browser.\n\n"; #ifdef __WXGTK__ wxString fUrl = url; fUrl.Replace (L"&st", L" &st"); msg += fUrl; #else msg += url; #endif msg += L"\n\nDo you want to send us the error report?"; if (Gui->AskYesNo (msg, true)) wxLaunchDefaultBrowser (url, wxBROWSER_NEW_WINDOW); _exit (1); } #endif // TC_UNIX void FatalErrorHandler::Deregister() { #ifdef TC_UNIX signal (SIGILL, SIG_DFL); signal (SIGFPE, SIG_DFL); signal (SIGSEGV, SIG_DFL); signal (SIGBUS, SIG_DFL); signal (SIGSYS, SIG_DFL); #endif #ifndef TC_WINDOWS std::set_terminate (DefaultTerminateHandler); #endif } uint32 FatalErrorHandler::GetAppChecksum () { uint32 checkSum = 0; try { File executable; executable.Open (Application::GetExecutablePath()); Buffer executableData (executable.Length()); executable.ReadCompleteBuffer (executableData); checkSum = Crc32::ProcessBuffer (executableData); } catch (...) { } return checkSum; } wstring FatalErrorHandler::GetCallStack (int depth) { #if wxUSE_STACKWALKER == 1 class StackWalker : public wxStackWalker { public: StackWalker () : FrameCount (0) { } void OnStackFrame (const wxStackFrame &frame) { if (FrameCount >= 32) return; StackVars << L"&st" << FrameCount++ << L"="; wxString functionName = frame.GetName(); if (!functionName.empty() && !frame.GetModule().empty()) { int p = functionName.Find (L"("); if (p != wxNOT_FOUND) functionName = functionName.Mid (0, p); for (size_t i = 0; i < functionName.size(); ++i) { if (!isalnum (functionName[i])) functionName[i] = L'_'; } while (functionName.Replace (L"__", L"_")); StackVars << wstring (functionName); } else StackVars << "0X" << hex << frame.GetAddress() << dec; } int FrameCount; wstringstream StackVars; }; StackWalker stackWalker; stackWalker.Walk (2); return stackWalker.StackVars.str(); #else // wxUSE_STACKWALKER return wstring(); #endif // wxUSE_STACKWALKER } void FatalErrorHandler::OnTerminate () { try { throw; } catch (UserAbort&) { } catch (Exception &e) { wxString vars; wxString exName = StringConverter::ToWide (StringConverter::GetTypeName (typeid (e))); if (exName.find (L"VeraCrypt::") != string::npos) exName = exName.Mid (11); wxString exPos = StringConverter::ToWide (e.what()); if (exPos.find (L"VeraCrypt::") != string::npos) exPos = exPos.Mid (11); vars << L"cpus=" << wxThread::GetCPUCount(); vars << wxString::Format (L"&cksum=%x", GetAppChecksum()); vars << L"&exception=" << exName; vars << L"&exlocation=" << exPos; vars << FatalErrorHandler::GetCallStack (16); vars.Replace (L"::", L"."); vars.Replace (L":", L"."); wxString url = Gui->GetHomepageLinkURL (L"err-report", true, vars); url.Replace (L"=0x", L"="); url.Replace (L"=0X0x", L"=0x"); url.Replace (L"=0X", L"=0x"); wxString msg = L"An unhandled exception has occurred and VeraCrypt must be terminated. If this is caused by a bug in VeraCrypt, we would like to fix it. To help us, you can send us an automatically generated error report containing the following items:\n\n- Program version\n- Operating system version\n- Hardware architecture\n- Checksum of VeraCrypt executable\n- Error description\n- Error location\n"; #if wxUSE_STACKWALKER == 1 msg += L"- VeraCrypt call stack\n"; #endif msg += L"\nIf you select 'Yes', the following URL (which contains the entire error report) will be opened in your default Internet browser.\n\n"; #ifdef __WXGTK__ wxString fUrl = url; fUrl.Replace (L"&st", L" &st"); msg += fUrl; #else msg += url; #endif msg += L"\n\nDo you want to send us the error report?"; if (Gui->AskYesNo (msg, true)) wxLaunchDefaultBrowser (url, wxBROWSER_NEW_WINDOW); } catch (exception &e) { Gui->ShowError (e); } catch (...) { Gui->ShowError (_("Unknown exception occurred.")); } _exit (1); } void FatalErrorHandler::Register () { #ifndef TC_WINDOWS // OnUnhandledException() seems to be called only on Windows DefaultTerminateHandler = std::set_terminate (OnTerminate); #endif #ifdef TC_UNIX struct sigaction action; Memory::Zero (&action, sizeof (action)); action.sa_flags = SA_SIGINFO; action.sa_sigaction = OnFatalProgramErrorSignal; throw_sys_if (sigaction (SIGILL, &action, nullptr) == -1); throw_sys_if (sigaction (SIGFPE, &action, nullptr) == -1); throw_sys_if (sigaction (SIGSEGV, &action, nullptr) == -1); throw_sys_if (sigaction (SIGBUS, &action, nullptr) == -1); throw_sys_if (sigaction (SIGSYS, &action, nullptr) == -1); #endif } }