mirror of https://github.com/FWGS/xash3d-fwgs
450 lines
14 KiB
C
450 lines
14 KiB
C
/*
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crashhandler.c - advanced crashhandler
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Copyright (C) 2016 Mittorn
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#define _GNU_SOURCE
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#include "common.h"
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/*
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================
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Sys_Crash
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Crash handler, called from system
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================
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*/
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#if XASH_CRASHHANDLER == CRASHHANDLER_DBGHELP || XASH_CRASHHANDLER == CRASHHANDLER_WIN32
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#if XASH_CRASHHANDLER == CRASHHANDLER_DBGHELP
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#pragma comment( lib, "dbghelp" )
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#pragma comment( lib, "psapi" )
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#include <winnt.h>
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#include <dbghelp.h>
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#include <psapi.h>
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#ifndef XASH_SDL
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typedef ULONG_PTR DWORD_PTR, *PDWORD_PTR;
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#endif
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int ModuleName( HANDLE process, char *name, void *address, int len )
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{
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DWORD_PTR baseAddress = 0;
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static HMODULE *moduleArray;
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static unsigned int moduleCount;
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LPBYTE moduleArrayBytes;
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DWORD bytesRequired;
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int i;
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if(len < 3)
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return 0;
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if ( !moduleArray && EnumProcessModules( process, NULL, 0, &bytesRequired ) )
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{
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if ( bytesRequired )
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{
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moduleArrayBytes = (LPBYTE)LocalAlloc( LPTR, bytesRequired );
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if ( moduleArrayBytes )
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{
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if( EnumProcessModules( process, (HMODULE *)moduleArrayBytes, bytesRequired, &bytesRequired ) )
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{
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moduleCount = bytesRequired / sizeof( HMODULE );
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moduleArray = (HMODULE *)moduleArrayBytes;
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}
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}
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}
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}
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for( i = 0; i<moduleCount; i++ )
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{
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MODULEINFO info;
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GetModuleInformation( process, moduleArray[i], &info, sizeof(MODULEINFO) );
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if( ( address > info.lpBaseOfDll ) &&
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( (DWORD64)address < (DWORD64)info.lpBaseOfDll + (DWORD64)info.SizeOfImage ) )
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return GetModuleBaseName( process, moduleArray[i], name, len );
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}
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return Q_snprintf(name, len, "???");
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}
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static void stack_trace( PEXCEPTION_POINTERS pInfo )
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{
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char message[1024];
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int len = 0;
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size_t i;
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HANDLE process = GetCurrentProcess();
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HANDLE thread = GetCurrentThread();
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IMAGEHLP_LINE64 line;
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DWORD dline = 0;
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DWORD options;
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CONTEXT context;
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STACKFRAME64 stackframe;
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DWORD image;
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memcpy( &context, pInfo->ContextRecord, sizeof(CONTEXT) );
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options = SymGetOptions();
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options |= SYMOPT_DEBUG;
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options |= SYMOPT_LOAD_LINES;
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SymSetOptions( options );
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SymInitialize( process, NULL, TRUE );
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ZeroMemory( &stackframe, sizeof(STACKFRAME64) );
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#ifdef _M_IX86
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image = IMAGE_FILE_MACHINE_I386;
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stackframe.AddrPC.Offset = context.Eip;
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stackframe.AddrPC.Mode = AddrModeFlat;
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stackframe.AddrFrame.Offset = context.Ebp;
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stackframe.AddrFrame.Mode = AddrModeFlat;
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stackframe.AddrStack.Offset = context.Esp;
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stackframe.AddrStack.Mode = AddrModeFlat;
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#elif _M_X64
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image = IMAGE_FILE_MACHINE_AMD64;
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stackframe.AddrPC.Offset = context.Rip;
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stackframe.AddrPC.Mode = AddrModeFlat;
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stackframe.AddrFrame.Offset = context.Rsp;
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stackframe.AddrFrame.Mode = AddrModeFlat;
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stackframe.AddrStack.Offset = context.Rsp;
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stackframe.AddrStack.Mode = AddrModeFlat;
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#elif _M_IA64
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image = IMAGE_FILE_MACHINE_IA64;
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stackframe.AddrPC.Offset = context.StIIP;
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stackframe.AddrPC.Mode = AddrModeFlat;
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stackframe.AddrFrame.Offset = context.IntSp;
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stackframe.AddrFrame.Mode = AddrModeFlat;
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stackframe.AddrBStore.Offset = context.RsBSP;
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stackframe.AddrBStore.Mode = AddrModeFlat;
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stackframe.AddrStack.Offset = context.IntSp;
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stackframe.AddrStack.Mode = AddrModeFlat;
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#endif
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len += Q_snprintf( message + len, 1024 - len, "Sys_Crash: address %p, code %p\n", pInfo->ExceptionRecord->ExceptionAddress, (void*)pInfo->ExceptionRecord->ExceptionCode );
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if( SymGetLineFromAddr64( process, (DWORD64)pInfo->ExceptionRecord->ExceptionAddress, &dline, &line ) )
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{
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len += Q_snprintf(message + len, 1024 - len,"Exception: %s:%d:%d\n", (char*)line.FileName, (int)line.LineNumber, (int)dline);
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}
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if( SymGetLineFromAddr64( process, stackframe.AddrPC.Offset, &dline, &line ) )
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{
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len += Q_snprintf(message + len, 1024 - len,"PC: %s:%d:%d\n", (char*)line.FileName, (int)line.LineNumber, (int)dline);
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}
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if( SymGetLineFromAddr64( process, stackframe.AddrFrame.Offset, &dline, &line ) )
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{
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len += Q_snprintf(message + len, 1024 - len,"Frame: %s:%d:%d\n", (char*)line.FileName, (int)line.LineNumber, (int)dline);
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}
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for( i = 0; i < 25; i++ )
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{
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char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(TCHAR)];
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PSYMBOL_INFO symbol = (PSYMBOL_INFO)buffer;
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BOOL result = StackWalk64(
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image, process, thread,
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&stackframe, &context, NULL,
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SymFunctionTableAccess64, SymGetModuleBase64, NULL);
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DWORD64 displacement = 0;
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if( !result )
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break;
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symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
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symbol->MaxNameLen = MAX_SYM_NAME;
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len += Q_snprintf( message + len, 1024 - len, "% 2d %p", i, (void*)stackframe.AddrPC.Offset );
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if( SymFromAddr( process, stackframe.AddrPC.Offset, &displacement, symbol ) )
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{
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len += Q_snprintf( message + len, 1024 - len, " %s ", symbol->Name );
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}
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if( SymGetLineFromAddr64( process, stackframe.AddrPC.Offset, &dline, &line ) )
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{
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len += Q_snprintf(message + len, 1024 - len,"(%s:%d:%d) ", (char*)line.FileName, (int)line.LineNumber, (int)dline);
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}
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len += Q_snprintf( message + len, 1024 - len, "(");
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len += ModuleName( process, message + len, (void*)stackframe.AddrPC.Offset, 1024 - len );
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len += Q_snprintf( message + len, 1024 - len, ")\n");
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}
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#ifdef XASH_SDL
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if( host.type != HOST_DEDICATED ) // let system to restart server automaticly
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SDL_ShowSimpleMessageBox( SDL_MESSAGEBOX_ERROR,"Sys_Crash", message, host.hWnd );
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#endif
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Sys_PrintLog(message);
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SymCleanup(process);
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}
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#endif //DBGHELP
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LPTOP_LEVEL_EXCEPTION_FILTER oldFilter;
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long _stdcall Sys_Crash( PEXCEPTION_POINTERS pInfo )
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{
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// save config
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if( host.status != HOST_CRASHED )
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{
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// check to avoid recursive call
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host.crashed = true;
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#if XASH_CRASHHANDLER == CRASHHANDLER_DBGHELP
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stack_trace( pInfo );
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#else
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Sys_Warn( "Sys_Crash: call %p at address %p", pInfo->ExceptionRecord->ExceptionAddress, pInfo->ExceptionRecord->ExceptionCode );
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#endif
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if( host.type == HOST_NORMAL )
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CL_Crashed(); // tell client about crash
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else host.status = HOST_CRASHED;
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if( host_developer.value <= 0 )
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{
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// no reason to call debugger in release build - just exit
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Sys_Quit();
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return EXCEPTION_CONTINUE_EXECUTION;
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}
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// all other states keep unchanged to let debugger find bug
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Sys_DestroyConsole();
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}
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if( oldFilter )
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return oldFilter( pInfo );
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return EXCEPTION_CONTINUE_EXECUTION;
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}
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void Sys_SetupCrashHandler( void )
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{
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SetErrorMode( SEM_FAILCRITICALERRORS ); // no abort/retry/fail errors
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oldFilter = SetUnhandledExceptionFilter( Sys_Crash );
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host.hInst = GetModuleHandle( NULL );
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}
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void Sys_RestoreCrashHandler( void )
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{
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// restore filter
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if( oldFilter ) SetUnhandledExceptionFilter( oldFilter );
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}
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#elif XASH_CRASHHANDLER == CRASHHANDLER_UCONTEXT
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// Posix signal handler
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#include "library.h"
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#if XASH_FREEBSD || XASH_NETBSD || XASH_ANDROID || XASH_LINUX
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#define HAVE_UCONTEXT_H 1
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#endif
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#ifdef HAVE_UCONTEXT_H
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#include <ucontext.h>
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#endif
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#include <signal.h>
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#include <sys/mman.h>
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int printframe( char *buf, int len, int i, void *addr )
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{
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Dl_info dlinfo;
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if( len <= 0 )
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return 0; // overflow
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if( dladdr( addr, &dlinfo ))
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{
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if( dlinfo.dli_sname )
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return Q_snprintf( buf, len, "%2d: %p <%s+%lu> (%s)\n", i, addr, dlinfo.dli_sname,
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(unsigned long)addr - (unsigned long)dlinfo.dli_saddr, dlinfo.dli_fname ); // print symbol, module and address
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else
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return Q_snprintf( buf, len, "%2d: %p (%s)\n", i, addr, dlinfo.dli_fname ); // print module and address
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}
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else
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return Q_snprintf( buf, len, "%2d: %p\n", i, addr ); // print only address
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}
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struct sigaction oldFilter;
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#define STACK_BACKTRACE_STR_LEN 17
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#define STACK_BACKTRACE_STR "Stack backtrace:\n"
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#define STACK_DUMP_STR_LEN 12
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#define STACK_DUMP_STR "Stack dump:\n"
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#define ALIGN( x, y ) (((int) (x) + ((y)-1)) & ~((y)-1))
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static void Sys_Crash( int signal, siginfo_t *si, void *context)
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{
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void *pc, **bp, **sp; // this must be set for every OS!
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char message[8192];
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int len, logfd, i = 0;
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size_t pagesize;
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#if XASH_OPENBSD
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struct sigcontext *ucontext = (struct sigcontext*)context;
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#else
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ucontext_t *ucontext = (ucontext_t*)context;
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#endif
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#if XASH_AMD64
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#if XASH_FREEBSD
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pc = (void*)ucontext->uc_mcontext.mc_rip;
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bp = (void**)ucontext->uc_mcontext.mc_rbp;
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sp = (void**)ucontext->uc_mcontext.mc_rsp;
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#elif XASH_NETBSD
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pc = (void*)ucontext->uc_mcontext.__gregs[REG_RIP];
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bp = (void**)ucontext->uc_mcontext.__gregs[REG_RBP];
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sp = (void**)ucontext->uc_mcontext.__gregs[REG_RSP];
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#elif XASH_OPENBSD
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pc = (void*)ucontext->sc_rip;
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bp = (void**)ucontext->sc_rbp;
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sp = (void**)ucontext->sc_rsp;
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#else
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pc = (void*)ucontext->uc_mcontext.gregs[REG_RIP];
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bp = (void**)ucontext->uc_mcontext.gregs[REG_RBP];
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sp = (void**)ucontext->uc_mcontext.gregs[REG_RSP];
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#endif
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#elif XASH_X86
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#if XASH_FREEBSD
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pc = (void*)ucontext->uc_mcontext.mc_eip;
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bp = (void**)ucontext->uc_mcontext.mc_ebp;
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sp = (void**)ucontext->uc_mcontext.mc_esp;
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#elif XASH_NETBSD
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pc = (void*)ucontext->uc_mcontext.__gregs[REG_EIP];
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bp = (void**)ucontext->uc_mcontext.__gregs[REG_EBP];
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sp = (void**)ucontext->uc_mcontext.__gregs[REG_ESP];
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#elif XASH_OPENBSD
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pc = (void*)ucontext->sc_eip;
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bp = (void**)ucontext->sc_ebp;
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sp = (void**)ucontext->sc_esp;
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#else
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pc = (void*)ucontext->uc_mcontext.gregs[REG_EIP];
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bp = (void**)ucontext->uc_mcontext.gregs[REG_EBP];
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sp = (void**)ucontext->uc_mcontext.gregs[REG_ESP];
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#endif
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#elif XASH_ARM64
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pc = (void*)ucontext->uc_mcontext.pc;
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bp = (void*)ucontext->uc_mcontext.regs[29];
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sp = (void*)ucontext->uc_mcontext.sp;
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#elif XASH_ARM
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pc = (void*)ucontext->uc_mcontext.arm_pc;
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bp = (void*)ucontext->uc_mcontext.arm_fp;
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sp = (void*)ucontext->uc_mcontext.arm_sp;
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#else
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#error "Unknown arch!!!"
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#endif
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// safe actions first, stack and memory may be corrupted
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len = Q_snprintf( message, sizeof( message ), "Ver: %s %s (build %i-%s, %s-%s)\n",
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XASH_ENGINE_NAME, XASH_VERSION, Q_buildnum(), Q_buildcommit(), Q_buildos(), Q_buildarch() );
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#if !XASH_BSD
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len += Q_snprintf( message + len, sizeof( message ) - len, "Crash: signal %d errno %d with code %d at %p %p\n", signal, si->si_errno, si->si_code, si->si_addr, si->si_ptr );
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#else
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len += Q_snprintf( message + len, sizeof( message ) - len, "Crash: signal %d errno %d with code %d at %p\n", signal, si->si_errno, si->si_code, si->si_addr );
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#endif
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write( 2, message, len );
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// flush buffers before writing directly to descriptors
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fflush( stdout );
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fflush( stderr );
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// now get log fd and write trace directly to log
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logfd = Sys_LogFileNo();
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write( logfd, message, len );
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// try to print backtrace
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write( 2, STACK_BACKTRACE_STR, STACK_BACKTRACE_STR_LEN );
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write( logfd, STACK_BACKTRACE_STR, STACK_BACKTRACE_STR_LEN );
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strncpy( message + len, STACK_BACKTRACE_STR, sizeof( message ) - len );
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len += STACK_BACKTRACE_STR_LEN;
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pagesize = sysconf( _SC_PAGESIZE );
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do
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{
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int line = printframe( message + len, sizeof( message ) - len, ++i, pc);
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write( 2, message + len, line );
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write( logfd, message + len, line );
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len += line;
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//if( !dladdr(bp,0) ) break; // only when bp is in module
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if( ( mprotect( (char *)ALIGN( bp, pagesize ), pagesize, PROT_READ | PROT_WRITE | PROT_EXEC ) == -1) &&
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( mprotect( (char *)ALIGN( bp, pagesize ), pagesize, PROT_READ | PROT_EXEC ) == -1) &&
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( mprotect( (char *)ALIGN( bp, pagesize ), pagesize, PROT_READ | PROT_WRITE ) == -1) &&
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( mprotect( (char *)ALIGN( bp, pagesize ), pagesize, PROT_READ ) == -1) )
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break;
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if( ( mprotect( (char *)ALIGN( bp[0], pagesize ), pagesize, PROT_READ | PROT_WRITE | PROT_EXEC ) == -1) &&
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( mprotect( (char *)ALIGN( bp[0], pagesize ), pagesize, PROT_READ | PROT_EXEC ) == -1) &&
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( mprotect( (char *)ALIGN( bp[0], pagesize ), pagesize, PROT_READ | PROT_WRITE ) == -1) &&
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( mprotect( (char *)ALIGN( bp[0], pagesize ), pagesize, PROT_READ ) == -1) )
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break;
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pc = bp[1];
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bp = (void**)bp[0];
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}
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while( bp && i < 128 );
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// try to print stack
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write( 2, STACK_DUMP_STR, STACK_DUMP_STR_LEN );
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write( logfd, STACK_DUMP_STR, STACK_DUMP_STR_LEN );
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strncpy( message + len, STACK_DUMP_STR, sizeof( message ) - len );
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len += STACK_DUMP_STR_LEN;
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if( ( mprotect((char *)ALIGN( sp, pagesize ), pagesize, PROT_READ | PROT_WRITE | PROT_EXEC ) != -1) ||
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( mprotect((char *)ALIGN( sp, pagesize ), pagesize, PROT_READ | PROT_EXEC ) != -1) ||
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( mprotect((char *)ALIGN( sp, pagesize ), pagesize, PROT_READ | PROT_WRITE ) != -1) ||
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( mprotect((char *)ALIGN( sp, pagesize ), pagesize, PROT_READ ) != -1) )
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{
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for( i = 0; i < 32; i++ )
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{
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int line = printframe( message + len, sizeof( message ) - len, i, sp[i] );
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write( 2, message + len, line );
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write( logfd, message + len, line );
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len += line;
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}
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}
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// put MessageBox as Sys_Error
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Msg( "%s\n", message );
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#ifdef XASH_SDL
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SDL_SetWindowGrab( host.hWnd, SDL_FALSE );
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#endif
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MSGBOX( message );
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// log saved, now we can try to save configs and close log correctly, it may crash
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if( host.type == HOST_NORMAL )
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CL_Crashed();
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host.status = HOST_CRASHED;
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host.crashed = true;
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Sys_Quit();
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}
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void Sys_SetupCrashHandler( void )
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{
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struct sigaction act;
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act.sa_sigaction = Sys_Crash;
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act.sa_flags = SA_SIGINFO | SA_ONSTACK;
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sigaction( SIGSEGV, &act, &oldFilter );
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sigaction( SIGABRT, &act, &oldFilter );
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sigaction( SIGBUS, &act, &oldFilter );
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sigaction( SIGILL, &act, &oldFilter );
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}
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void Sys_RestoreCrashHandler( void )
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{
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sigaction( SIGSEGV, &oldFilter, NULL );
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sigaction( SIGABRT, &oldFilter, NULL );
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sigaction( SIGBUS, &oldFilter, NULL );
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sigaction( SIGILL, &oldFilter, NULL );
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}
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#elif XASH_CRASHHANDLER == CRASHHANDLER_NULL
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void Sys_SetupCrashHandler( void )
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{
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// stub
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}
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void Sys_RestoreCrashHandler( void )
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{
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// stub
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}
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#endif
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