# crashlog_win.cpp

Go to the documentation of this file.

    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD 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, version 2.
    00006  * OpenTTD 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.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "../../stdafx.h"
    00013 #if defined(_MSC_VER) && defined(_M_AMD64)
    00014 /* Redefine WinNT version to get RtlCaptureContext prototype. */
    00015 #undef _WIN32_WINNT
    00016 #undef NTDDI_VERSION
    00017 #define _WIN32_WINNT _WIN32_WINNT_WINXP
    00018 #endif /* defined(_MSC_VER) && defined(_M_AMD64) */
    00019 #include "../../crashlog.h"
    00020 #include "win32.h"
    00021 #include "../../core/alloc_func.hpp"
    00022 #include "../../core/math_func.hpp"
    00023 #include "../../string_func.h"
    00024 #include "../../fileio_func.h"
    00025 #include "../../strings_func.h"
    00026 #include "../../gamelog.h"
    00027 #include "../../saveload/saveload.h"
    00028 #include "../../video/video_driver.hpp"
    00029
    00030 #include <windows.h>
    00031 #include <signal.h>
    00032
    00033 static const uint MAX_SYMBOL_LEN = 512;
    00034 static const uint MAX_FRAMES     = 64;
    00035
    00036 /* printf format specification for 32/64-bit addresses. */
    00037 #ifdef _M_AMD64
    00038 #define PRINTF_PTR "0x%016IX"
    00039 #else
    00040 #define PRINTF_PTR "0x%08X"
    00041 #endif
    00042
    00046 class CrashLogWindows : public CrashLog {
    00048   EXCEPTION_POINTERS *ep;
    00049
    00050   /* virtual */ char *LogOSVersion(char *buffer, const char *last) const;
    00051   /* virtual */ char *LogError(char *buffer, const char *last, const char *message) const;
    00052   /* virtual */ char *LogStacktrace(char *buffer, const char *last) const;
    00053   /* virtual */ char *LogRegisters(char *buffer, const char *last) const;
    00054   /* virtual */ char *LogModules(char *buffer, const char *last) const;
    00055 public:
    00056 #if defined(_MSC_VER)
    00057   /* virtual */ int WriteCrashDump(char *filename, const char *filename_last) const;
    00058   char *AppendDecodedStacktrace(char *buffer, const char *last) const;
    00059 #else
    00060   char *AppendDecodedStacktrace(char *buffer, const char *last) const { return buffer; }
    00061 #endif /* _MSC_VER */
    00062
    00064   char crashlog[65536];
    00066   char crashlog_filename[MAX_PATH];
    00068   char crashdump_filename[MAX_PATH];
    00070   char screenshot_filename[MAX_PATH];
    00071
    00076   CrashLogWindows(EXCEPTION_POINTERS *ep = NULL) :
    00077     ep(ep)
    00078   {
    00079     this->crashlog[0] = '\0';
    00080     this->crashlog_filename[0] = '\0';
    00081     this->crashdump_filename[0] = '\0';
    00082     this->screenshot_filename[0] = '\0';
    00083   }
    00084
    00088   static CrashLogWindows *current;
    00089 };
    00090
    00091 /* static */ CrashLogWindows *CrashLogWindows::current = NULL;
    00092
    00093 /* virtual */ char *CrashLogWindows::LogOSVersion(char *buffer, const char *last) const
    00094 {
    00095   _OSVERSIONINFOA os;
    00096   os.dwOSVersionInfoSize = sizeof(os);
    00097   GetVersionExA(&os);
    00098
    00099   return buffer + seprintf(buffer, last,
    00100       "Operating system:\n"
    00101       " Name:     Windows\n"
    00102       " Release:  %d.%d.%d (%s)\n",
    00103       (int)os.dwMajorVersion,
    00104       (int)os.dwMinorVersion,
    00105       (int)os.dwBuildNumber,
    00106       os.szCSDVersion
    00107   );
    00108
    00109 }
    00110
    00111 /* virtual */ char *CrashLogWindows::LogError(char *buffer, const char *last, const char *message) const
    00112 {
    00113   return buffer + seprintf(buffer, last,
    00114       "Crash reason:\n"
    00115       " Exception: %.8X\n"
    00116 #ifdef _M_AMD64
    00117       " Location:  %.16IX\n"
    00118 #else
    00119       " Location:  %.8X\n"
    00120 #endif
    00121       " Message:   %s\n\n",
    00122       (int)ep->ExceptionRecord->ExceptionCode,
    00123       (size_t)ep->ExceptionRecord->ExceptionAddress,
    00124       message == NULL ? "<none>" : message
    00125   );
    00126 }
    00127
    00128 struct DebugFileInfo {
    00129   uint32 size;
    00130   uint32 crc32;
    00131   SYSTEMTIME file_time;
    00132 };
    00133
    00134 static uint32 *_crc_table;
    00135
    00136 static void MakeCRCTable(uint32 *table)
    00137 {
    00138   uint32 crc, poly = 0xEDB88320L;
    00139   int i;
    00140   int j;
    00141
    00142   _crc_table = table;
    00143
    00144   for (i = 0; i != 256; i++) {
    00145     crc = i;
    00146     for (j = 8; j != 0; j--) {
    00147       crc = (crc & 1 ? (crc >> 1) ^ poly : crc >> 1);
    00148     }
    00149     table[i] = crc;
    00150   }
    00151 }
    00152
    00153 static uint32 CalcCRC(byte *data, uint size, uint32 crc)
    00154 {
    00155   for (; size > 0; size--) {
    00156     crc = ((crc >> 8) & 0x00FFFFFF) ^ _crc_table[(crc ^ *data++) & 0xFF];
    00157   }
    00158   return crc;
    00159 }
    00160
    00161 static void GetFileInfo(DebugFileInfo *dfi, const TCHAR *filename)
    00162 {
    00163   HANDLE file;
    00164   memset(dfi, 0, sizeof(*dfi));
    00165
    00166   file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
    00167   if (file != INVALID_HANDLE_VALUE) {
    00168     byte buffer[1024];
    00169     DWORD numread;
    00170     uint32 filesize = 0;
    00171     FILETIME write_time;
    00172     uint32 crc = (uint32)-1;
    00173
    00174     for (;;) {
    00175       if (ReadFile(file, buffer, sizeof(buffer), &numread, NULL) == 0 || numread == 0) {
    00176         break;
    00177       }
    00178       filesize += numread;
    00179       crc = CalcCRC(buffer, numread, crc);
    00180     }
    00181     dfi->size = filesize;
    00182     dfi->crc32 = crc ^ (uint32)-1;
    00183
    00184     if (GetFileTime(file, NULL, NULL, &write_time)) {
    00185       FileTimeToSystemTime(&write_time, &dfi->file_time);
    00186     }
    00187     CloseHandle(file);
    00188   }
    00189 }
    00190
    00191
    00192 static char *PrintModuleInfo(char *output, const char *last, HMODULE mod)
    00193 {
    00194   TCHAR buffer[MAX_PATH];
    00195   DebugFileInfo dfi;
    00196
    00197   GetModuleFileName(mod, buffer, MAX_PATH);
    00198   GetFileInfo(&dfi, buffer);
    00199   output += seprintf(output, last, " %-20s handle: %p size: %d crc: %.8X date: %d-%.2d-%.2d %.2d:%.2d:%.2d\n",
    00200     WIDE_TO_MB(buffer),
    00201     mod,
    00202     dfi.size,
    00203     dfi.crc32,
    00204     dfi.file_time.wYear,
    00205     dfi.file_time.wMonth,
    00206     dfi.file_time.wDay,
    00207     dfi.file_time.wHour,
    00208     dfi.file_time.wMinute,
    00209     dfi.file_time.wSecond
    00210   );
    00211   return output;
    00212 }
    00213
    00214 /* virtual */ char *CrashLogWindows::LogModules(char *output, const char *last) const
    00215 {
    00216   MakeCRCTable(AllocaM(uint32, 256));
    00217   BOOL (WINAPI *EnumProcessModules)(HANDLE, HMODULE*, DWORD, LPDWORD);
    00218
    00219   output += seprintf(output, last, "Module information:\n");
    00220
    00221   if (LoadLibraryList((Function*)&EnumProcessModules, "psapi.dll\0EnumProcessModules\0\0")) {
    00222     HMODULE modules[100];
    00223     DWORD needed;
    00224     BOOL res;
    00225
    00226     HANDLE proc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, GetCurrentProcessId());
    00227     if (proc != NULL) {
    00228       res = EnumProcessModules(proc, modules, sizeof(modules), &needed);
    00229       CloseHandle(proc);
    00230       if (res) {
    00231         size_t count = min(needed / sizeof(HMODULE), lengthof(modules));
    00232
    00233         for (size_t i = 0; i != count; i++) output = PrintModuleInfo(output, last, modules[i]);
    00234         return output + seprintf(output, last, "\n");
    00235       }
    00236     }
    00237   }
    00238   output = PrintModuleInfo(output, last, NULL);
    00239   return output + seprintf(output, last, "\n");
    00240 }
    00241
    00242 /* virtual */ char *CrashLogWindows::LogRegisters(char *buffer, const char *last) const
    00243 {
    00244   buffer += seprintf(buffer, last, "Registers:\n");
    00245 #ifdef _M_AMD64
    00246   buffer += seprintf(buffer, last,
    00247     " RAX: %.16I64X RBX: %.16I64X RCX: %.16I64X RDX: %.16I64X\n"
    00248     " RSI: %.16I64X RDI: %.16I64X RBP: %.16I64X RSP: %.16I64X\n"
    00249     " R8:  %.16I64X R9:  %.16I64X R10: %.16I64X R11: %.16I64X\n"
    00250     " R12: %.16I64X R13: %.16I64X R14: %.16I64X R15: %.16I64X\n"
    00251     " RIP: %.16I64X EFLAGS: %.8lX\n",
    00252     ep->ContextRecord->Rax,
    00253     ep->ContextRecord->Rbx,
    00254     ep->ContextRecord->Rcx,
    00255     ep->ContextRecord->Rdx,
    00256     ep->ContextRecord->Rsi,
    00257     ep->ContextRecord->Rdi,
    00258     ep->ContextRecord->Rbp,
    00259     ep->ContextRecord->Rsp,
    00260     ep->ContextRecord->R8,
    00261     ep->ContextRecord->R9,
    00262     ep->ContextRecord->R10,
    00263     ep->ContextRecord->R11,
    00264     ep->ContextRecord->R12,
    00265     ep->ContextRecord->R13,
    00266     ep->ContextRecord->R14,
    00267     ep->ContextRecord->R15,
    00268     ep->ContextRecord->Rip,
    00269     ep->ContextRecord->EFlags
    00270   );
    00271 #else
    00272   buffer += seprintf(buffer, last,
    00273     " EAX: %.8X EBX: %.8X ECX: %.8X EDX: %.8X\n"
    00274     " ESI: %.8X EDI: %.8X EBP: %.8X ESP: %.8X\n"
    00275     " EIP: %.8X EFLAGS: %.8X\n",
    00276     (int)ep->ContextRecord->Eax,
    00277     (int)ep->ContextRecord->Ebx,
    00278     (int)ep->ContextRecord->Ecx,
    00279     (int)ep->ContextRecord->Edx,
    00280     (int)ep->ContextRecord->Esi,
    00281     (int)ep->ContextRecord->Edi,
    00282     (int)ep->ContextRecord->Ebp,
    00283     (int)ep->ContextRecord->Esp,
    00284     (int)ep->ContextRecord->Eip,
    00285     (int)ep->ContextRecord->EFlags
    00286   );
    00287 #endif
    00288
    00289   buffer += seprintf(buffer, last, "\n Bytes at instruction pointer:\n");
    00290 #ifdef _M_AMD64
    00291   byte *b = (byte*)ep->ContextRecord->Rip;
    00292 #else
    00293   byte *b = (byte*)ep->ContextRecord->Eip;
    00294 #endif
    00295   for (int i = 0; i != 24; i++) {
    00296     if (IsBadReadPtr(b, 1)) {
    00297       buffer += seprintf(buffer, last, " ??"); // OCR: WAS: , 0);
    00298     } else {
    00299       buffer += seprintf(buffer, last, " %.2X", *b);
    00300     }
    00301     b++;
    00302   }
    00303   return buffer + seprintf(buffer, last, "\n\n");
    00304 }
    00305
    00306 /* virtual */ char *CrashLogWindows::LogStacktrace(char *buffer, const char *last) const
    00307 {
    00308   buffer += seprintf(buffer, last, "Stack trace:\n");
    00309 #ifdef _M_AMD64
    00310   uint32 *b = (uint32*)ep->ContextRecord->Rsp;
    00311 #else
    00312   uint32 *b = (uint32*)ep->ContextRecord->Esp;
    00313 #endif
    00314   for (int j = 0; j != 24; j++) {
    00315     for (int i = 0; i != 8; i++) {
    00316       if (IsBadReadPtr(b, sizeof(uint32))) {
    00317         buffer += seprintf(buffer, last, " ????????"); // OCR: WAS - , 0);
    00318       } else {
    00319         buffer += seprintf(buffer, last, " %.8X", *b);
    00320       }
    00321       b++;
    00322     }
    00323     buffer += seprintf(buffer, last, "\n");
    00324   }
    00325   return buffer + seprintf(buffer, last, "\n");
    00326 }
    00327
    00328 #if defined(_MSC_VER)
    00329 #include <dbghelp.h>
    00330
    00331 char *CrashLogWindows::AppendDecodedStacktrace(char *buffer, const char *last) const
    00332 {
    00333 #define M(x) x "\0"
    00334   static const char dbg_import[] =
    00335     M("dbghelp.dll")
    00336     M("SymInitialize")
    00337     M("SymSetOptions")
    00338     M("SymCleanup")
    00339     M("StackWalk64")
    00340     M("SymFunctionTableAccess64")
    00341     M("SymGetModuleBase64")
    00342     M("SymGetModuleInfo64")
    00343     M("SymGetSymFromAddr64")
    00344     M("SymGetLineFromAddr64")
    00345     M("")
    00346     ;
    00347 #undef M
    00348
    00349   struct ProcPtrs {
    00350     BOOL (WINAPI * pSymInitialize)(HANDLE, PCSTR, BOOL);
    00351     BOOL (WINAPI * pSymSetOptions)(DWORD);
    00352     BOOL (WINAPI * pSymCleanup)(HANDLE);
    00353     BOOL (WINAPI * pStackWalk64)(DWORD, HANDLE, HANDLE, LPSTACKFRAME64, PVOID, PREAD_PROCESS_MEMORY_ROUTINE64, PFUNCTION_TABLE_ACCESS_ROUTINE64, PGET_MODULE_BASE_ROUTINE64, PTRANSLATE_ADDRESS_ROUTINE64);
    00354     PVOID (WINAPI * pSymFunctionTableAccess64)(HANDLE, DWORD64);
    00355     DWORD64 (WINAPI * pSymGetModuleBase64)(HANDLE, DWORD64);
    00356     BOOL (WINAPI * pSymGetModuleInfo64)(HANDLE, DWORD64, PIMAGEHLP_MODULE64);
    00357     BOOL (WINAPI * pSymGetSymFromAddr64)(HANDLE, DWORD64, PDWORD64, PIMAGEHLP_SYMBOL64);
    00358     BOOL (WINAPI * pSymGetLineFromAddr64)(HANDLE, DWORD64, PDWORD, PIMAGEHLP_LINE64);
    00359   } proc;
    00360
    00361   buffer += seprintf(buffer, last, "\nDecoded stack trace:\n");
    00362
    00363   /* Try to load the functions from the DLL, if that fails because of a too old dbghelp.dll, just skip it. */
    00364   if (LoadLibraryList((Function*)&proc, dbg_import)) {
    00365     /* Initialize symbol handler. */
    00366     HANDLE hCur = GetCurrentProcess();
    00367     proc.pSymInitialize(hCur, NULL, TRUE);
    00368     /* Load symbols only when needed, fail silently on errors, demangle symbol names. */
    00369     proc.pSymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_FAIL_CRITICAL_ERRORS | SYMOPT_UNDNAME);
    00370
    00371     /* Initialize starting stack frame from context record. */
    00372     STACKFRAME64 frame;
    00373     memset(&frame, 0, sizeof(frame));
    00374 #ifdef _M_AMD64
    00375     frame.AddrPC.Offset = ep->ContextRecord->Rip;
    00376     frame.AddrFrame.Offset = ep->ContextRecord->Rbp;
    00377     frame.AddrStack.Offset = ep->ContextRecord->Rsp;
    00378 #else
    00379     frame.AddrPC.Offset = ep->ContextRecord->Eip;
    00380     frame.AddrFrame.Offset = ep->ContextRecord->Ebp;
    00381     frame.AddrStack.Offset = ep->ContextRecord->Esp;
    00382 #endif
    00383     frame.AddrPC.Mode = AddrModeFlat;
    00384     frame.AddrFrame.Mode = AddrModeFlat;
    00385     frame.AddrStack.Mode = AddrModeFlat;
    00386
    00387     /* Copy context record as StackWalk64 may modify it. */
    00388     CONTEXT ctx;
    00389     memcpy(&ctx, ep->ContextRecord, sizeof(ctx));
    00390
    00391     /* Allocate space for symbol info. */
    00392     IMAGEHLP_SYMBOL64 *sym_info = (IMAGEHLP_SYMBOL64*)alloca(sizeof(IMAGEHLP_SYMBOL64) + MAX_SYMBOL_LEN - 1);
    00393     sym_info->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
    00394     sym_info->MaxNameLength = MAX_SYMBOL_LEN;
    00395
    00396     /* Walk stack at most MAX_FRAMES deep in case the stack is corrupt. */
    00397     for (uint num = 0; num < MAX_FRAMES; num++) {
    00398       if (!proc.pStackWalk64(
    00399 #ifdef _M_AMD64
    00400         IMAGE_FILE_MACHINE_AMD64,
    00401 #else
    00402         IMAGE_FILE_MACHINE_I386,
    00403 #endif
    00404         hCur, GetCurrentThread(), &frame, &ctx, NULL, proc.pSymFunctionTableAccess64, proc.pSymGetModuleBase64, NULL)) break;
    00405
    00406       if (frame.AddrPC.Offset == frame.AddrReturn.Offset) {
    00407         buffer += seprintf(buffer, last, " <infinite loop>\n");
    00408         break;
    00409       }
    00410
    00411       /* Get module name. */
    00412       const char *mod_name = "???";
    00413
    00414       IMAGEHLP_MODULE64 module;
    00415       module.SizeOfStruct = sizeof(module);
    00416       if (proc.pSymGetModuleInfo64(hCur, frame.AddrPC.Offset, &module)) {
    00417         mod_name = module.ModuleName;
    00418       }
    00419
    00420       /* Print module and instruction pointer. */
    00421       buffer += seprintf(buffer, last, "[%02d] %-20s " PRINTF_PTR, num, mod_name, frame.AddrPC.Offset);
    00422
    00423       /* Get symbol name and line info if possible. */
    00424       DWORD64 offset;
    00425       if (proc.pSymGetSymFromAddr64(hCur, frame.AddrPC.Offset, &offset, sym_info)) {
    00426         buffer += seprintf(buffer, last, " %s + %I64u", sym_info->Name, offset);
    00427
    00428         DWORD line_offs;
    00429         IMAGEHLP_LINE64 line;
    00430         line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
    00431         if (proc.pSymGetLineFromAddr64(hCur, frame.AddrPC.Offset, &line_offs, &line)) {
    00432           buffer += seprintf(buffer, last, " (%s:%d)", line.FileName, line.LineNumber);
    00433         }
    00434       }
    00435       buffer += seprintf(buffer, last, "\n");
    00436     }
    00437
    00438     proc.pSymCleanup(hCur);
    00439   }
    00440
    00441   return buffer + seprintf(buffer, last, "\n*** End of additional info ***\n");
    00442 }
    00443
    00444 /* virtual */ int CrashLogWindows::WriteCrashDump(char *filename, const char *filename_last) const
    00445 {
    00446   int ret = 0;
    00447   HMODULE dbghelp = LoadLibrary(_T("dbghelp.dll"));
    00448   if (dbghelp != NULL) {
    00449     typedef BOOL (WINAPI *MiniDumpWriteDump_t)(HANDLE, DWORD, HANDLE,
    00450         MINIDUMP_TYPE,
    00451         CONST PMINIDUMP_EXCEPTION_INFORMATION,
    00452         CONST PMINIDUMP_USER_STREAM_INFORMATION,
    00453         CONST PMINIDUMP_CALLBACK_INFORMATION);
    00454     MiniDumpWriteDump_t funcMiniDumpWriteDump = (MiniDumpWriteDump_t)GetProcAddress(dbghelp, "MiniDumpWriteDump");
    00455     if (funcMiniDumpWriteDump != NULL) {
    00456       seprintf(filename, filename_last, "%scrash.dmp", _personal_dir);
    00457       HANDLE file  = CreateFile(OTTD2FS(filename), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0);
    00458       HANDLE proc  = GetCurrentProcess();
    00459       DWORD procid = GetCurrentProcessId();
    00460       MINIDUMP_EXCEPTION_INFORMATION mdei;
    00461       MINIDUMP_USER_STREAM userstream;
    00462       MINIDUMP_USER_STREAM_INFORMATION musi;
    00463
    00464       userstream.Type        = LastReservedStream + 1;
    00465       userstream.Buffer      = (void*)this->crashlog;
    00466       userstream.BufferSize  = (ULONG)strlen(this->crashlog) + 1;
    00467
    00468       musi.UserStreamCount   = 1;
    00469       musi.UserStreamArray   = &userstream;
    00470
    00471       mdei.ThreadId = GetCurrentThreadId();
    00472       mdei.ExceptionPointers  = ep;
    00473       mdei.ClientPointers     = false;
    00474
    00475       funcMiniDumpWriteDump(proc, procid, file, MiniDumpWithDataSegs, &mdei, &musi, NULL);
    00476       ret = 1;
    00477     } else {
    00478       ret = -1;
    00479     }
    00480     FreeLibrary(dbghelp);
    00481   }
    00482   return ret;
    00483 }
    00484 #endif /* _MSC_VER */
    00485
    00486 extern bool CloseConsoleLogIfActive();
    00487 static void ShowCrashlogWindow();
    00488
    00493 void *_safe_esp = NULL;
    00494
    00495 static LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS *ep)
    00496 {
    00497   if (CrashLogWindows::current != NULL) {
    00498     CrashLog::AfterCrashLogCleanup();
    00499     ExitProcess(2);
    00500   }
    00501
    00502   if (GamelogTestEmergency()) {
    00503     static const TCHAR _emergency_crash[] =
    00504       _T("A serious fault condition occurred in the game. The game will shut down.\n")
    00505       _T("As you loaded an emergency savegame no crash information will be generated.\n");
    00506     MessageBox(NULL, _emergency_crash, _T("Fatal Application Failure"), MB_ICONERROR);
    00507     ExitProcess(3);
    00508   }
    00509
    00510   if (SaveloadCrashWithMissingNewGRFs()) {
    00511     static const TCHAR _saveload_crash[] =
    00512       _T("A serious fault condition occurred in the game. The game will shut down.\n")
    00513       _T("As you loaded an savegame for which you do not have the required NewGRFs\n")
    00514       _T("no crash information will be generated.\n");
    00515     MessageBox(NULL, _saveload_crash, _T("Fatal Application Failure"), MB_ICONERROR);
    00516     ExitProcess(3);
    00517   }
    00518
    00519   CrashLogWindows *log = new CrashLogWindows(ep);
    00520   CrashLogWindows::current = log;
    00521   char *buf = log->FillCrashLog(log->crashlog, lastof(log->crashlog));
    00522   log->WriteCrashDump(log->crashdump_filename, lastof(log->crashdump_filename));
    00523   log->AppendDecodedStacktrace(buf, lastof(log->crashlog));
    00524   log->WriteCrashLog(log->crashlog, log->crashlog_filename, lastof(log->crashlog_filename));
    00525   log->WriteScreenshot(log->screenshot_filename, lastof(log->screenshot_filename));
    00526
    00527   /* Close any possible log files */
    00528   CloseConsoleLogIfActive();
    00529
    00530   if ((_video_driver == NULL || _video_driver->HasGUI()) && _safe_esp != NULL) {
    00531 #ifdef _M_AMD64
    00532     ep->ContextRecord->Rip = (DWORD64)ShowCrashlogWindow;
    00533     ep->ContextRecord->Rsp = (DWORD64)_safe_esp;
    00534 #else
    00535     ep->ContextRecord->Eip = (DWORD)ShowCrashlogWindow;
    00536     ep->ContextRecord->Esp = (DWORD)_safe_esp;
    00537 #endif
    00538     return EXCEPTION_CONTINUE_EXECUTION;
    00539   }
    00540
    00541   CrashLog::AfterCrashLogCleanup();
    00542   return EXCEPTION_EXECUTE_HANDLER;
    00543 }
    00544
    00545 static void CDECL CustomAbort(int signal)
    00546 {
    00547   RaiseException(0xE1212012, 0, 0, NULL);
    00548 }
    00549
    00550 /* static */ void CrashLog::InitialiseCrashLog()
    00551 {
    00552 #ifdef _M_AMD64
    00553   CONTEXT ctx;
    00554   RtlCaptureContext(&ctx);
    00555
    00556   /* The stack pointer for AMD64 must always be 16-byte aligned inside a
    00557    * function. As we are simulating a function call with the safe ESP value,
    00558    * we need to subtract 8 for the imaginary return address otherwise stack
    00559    * alignment would be wrong in the called function. */
    00560   _safe_esp = (void *)(ctx.Rsp - 8);
    00561 #else
    00562 #if defined(_MSC_VER)
    00563   _asm {
    00564     mov _safe_esp, esp
    00565   }
    00566 #else
    00567   asm("movl %esp, __safe_esp");
    00568 #endif
    00569 #endif
    00570
    00571   /* SIGABRT is not an unhandled exception, so we need to intercept it. */
    00572   signal(SIGABRT, CustomAbort);
    00573 #if defined(_MSC_VER)
    00574   /* Don't show abort message as we will get the crashlog window anyway. */
    00575   _set_abort_behavior(0, _WRITE_ABORT_MSG);
    00576 #endif
    00577   SetUnhandledExceptionFilter(ExceptionHandler);
    00578 }
    00579
    00580 /* The crash log GUI */
    00581
    00582 static bool _expanded;
    00583
    00584 static const TCHAR _crash_desc[] =
    00585   _T("A serious fault condition occurred in the game. The game will shut down.\n")
    00586   _T("Please send the crash information and the crash.dmp file (if any) to the developers.\n")
    00587   _T("This will greatly help debugging. The correct place to do this is http://bugs.openttd.org. ")
    00588   _T("The information contained in the report is displayed below.\n")
    00589   _T("Press \"Emergency save\" to attempt saving the game. Generated file(s):\n")
    00590   _T("%s");
    00591
    00592 static const TCHAR _save_succeeded[] =
    00593   _T("Emergency save succeeded.\nIts location is '%s'.\n")
    00594   _T("Be aware that critical parts of the internal game state may have become ")
    00595   _T("corrupted. The saved game is not guaranteed to work.");
    00596
    00597 static const TCHAR * const _expand_texts[] = {_T("S&how report >>"), _T("&Hide report <<") };
    00598
    00599 static void SetWndSize(HWND wnd, int mode)
    00600 {
    00601   RECT r, r2;
    00602
    00603   GetWindowRect(wnd, &r);
    00604   SetDlgItemText(wnd, 15, _expand_texts[mode == 1]);
    00605
    00606   if (mode >= 0) {
    00607     GetWindowRect(GetDlgItem(wnd, 11), &r2);
    00608     int offs = r2.bottom - r2.top + 10;
    00609     if (mode == 0) offs = -offs;
    00610     SetWindowPos(wnd, HWND_TOPMOST, 0, 0,
    00611       r.right - r.left, r.bottom - r.top + offs, SWP_NOMOVE | SWP_NOZORDER);
    00612   } else {
    00613     SetWindowPos(wnd, HWND_TOPMOST,
    00614       (GetSystemMetrics(SM_CXSCREEN) - (r.right - r.left)) / 2,
    00615       (GetSystemMetrics(SM_CYSCREEN) - (r.bottom - r.top)) / 2,
    00616       0, 0, SWP_NOSIZE);
    00617   }
    00618 }
    00619
    00620 static INT_PTR CALLBACK CrashDialogFunc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
    00621 {
    00622   switch (msg) {
    00623     case WM_INITDIALOG: {
    00624 #if defined(UNICODE)
    00625       /* We need to put the crash-log in a seperate buffer because the default
    00626        * buffer in MB_TO_WIDE is not large enough (512 chars) */
    00627       wchar_t crash_msgW[lengthof(CrashLogWindows::current->crashlog)];
    00628 #endif
    00629       /* Convert unix -> dos newlines because the edit box only supports that properly :( */
    00630       const char *unix_nl = CrashLogWindows::current->crashlog;
    00631       char dos_nl[lengthof(CrashLogWindows::current->crashlog)];
    00632       char *p = dos_nl;
    00633       WChar c;
    00634       while ((c = Utf8Consume(&unix_nl)) && p < lastof(dos_nl) - 4) { // 4 is max number of bytes per character
    00635         if (c == '\n') p += Utf8Encode(p, '\r');
    00636         p += Utf8Encode(p, c);
    00637       }
    00638       *p = '\0';
    00639
    00640       /* Add path to crash.log and crash.dmp (if any) to the crash window text */
    00641       size_t len = _tcslen(_crash_desc) + 2;
    00642       len += _tcslen(OTTD2FS(CrashLogWindows::current->crashlog_filename)) + 2;
    00643       len += _tcslen(OTTD2FS(CrashLogWindows::current->crashdump_filename)) + 2;
    00644       len += _tcslen(OTTD2FS(CrashLogWindows::current->screenshot_filename)) + 1;
    00645
    00646       TCHAR *text = AllocaM(TCHAR, len);
    00647       _sntprintf(text, len, _crash_desc, OTTD2FS(CrashLogWindows::current->crashlog_filename));
    00648       if (OTTD2FS(CrashLogWindows::current->crashdump_filename)[0] != _T('\0')) {
    00649         _tcscat(text, _T("\n"));
    00650         _tcscat(text, OTTD2FS(CrashLogWindows::current->crashdump_filename));
    00651       }
    00652       if (OTTD2FS(CrashLogWindows::current->screenshot_filename)[0] != _T('\0')) {
    00653         _tcscat(text, _T("\n"));
    00654         _tcscat(text, OTTD2FS(CrashLogWindows::current->screenshot_filename));
    00655       }
    00656
    00657       SetDlgItemText(wnd, 10, text);
    00658       SetDlgItemText(wnd, 11, MB_TO_WIDE_BUFFER(dos_nl, crash_msgW, lengthof(crash_msgW)));
    00659       SendDlgItemMessage(wnd, 11, WM_SETFONT, (WPARAM)GetStockObject(ANSI_FIXED_FONT), FALSE);
    00660       SetWndSize(wnd, -1);
    00661     } return TRUE;
    00662     case WM_COMMAND:
    00663       switch (wParam) {
    00664         case 12: // Close
    00665           CrashLog::AfterCrashLogCleanup();
    00666           ExitProcess(2);
    00667         case 13: // Emergency save
    00668           char filename[MAX_PATH];
    00669           if (CrashLogWindows::current->WriteSavegame(filename, lastof(filename))) {
    00670             size_t len = _tcslen(_save_succeeded) + _tcslen(OTTD2FS(filename)) + 1;
    00671             TCHAR *text = AllocaM(TCHAR, len);
    00672             _sntprintf(text, len, _save_succeeded, OTTD2FS(filename));
    00673             MessageBox(wnd, text, _T("Save successful"), MB_ICONINFORMATION);
    00674           } else {
    00675             MessageBox(wnd, _T("Save failed"), _T("Save failed"), MB_ICONINFORMATION);
    00676           }
    00677           break;
    00678         case 15: // Expand window to show crash-message
    00679           _expanded ^= 1;
    00680           SetWndSize(wnd, _expanded);
    00681           break;
    00682       }
    00683       return TRUE;
    00684     case WM_CLOSE:
    00685       CrashLog::AfterCrashLogCleanup();
    00686       ExitProcess(2);
    00687   }
    00688
    00689   return FALSE;
    00690 }
    00691
    00692 static void ShowCrashlogWindow()
    00693 {
    00694   ShowCursor(TRUE);
    00695   ShowWindow(GetActiveWindow(), FALSE);
    00696   DialogBox(GetModuleHandle(NULL), MAKEINTRESOURCE(100), NULL, CrashDialogFunc);
    00697 }