crashlog_win.cpp

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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 separate 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 }