2 # ifndef DONT_USE_SETDLLDIRECTORY
3 # define _WIN32_WINNT 0x0502
11 # include <mmsystem.h> // timeGetTime
12 # include <time.h> // localtime
13 # include <conio.h> // _kbhit, _getch, _putch
14 # include <io.h> // write; Include this BEFORE darkplaces.h because it uses strncpy which trips DP_STATIC_ASSERT
16 #pragma comment(lib, "winmm.lib")
20 # include <sys/sysctl.h>
23 # include <android/log.h>
27 # include <sys/time.h>
37 #include "taskqueue.h"
44 static char sys_timestring[128];
45 char *Sys_TimeString(const char *timeformat)
47 time_t mytime = time(NULL);
50 localtime_s(&mytm, &mytime);
51 strftime(sys_timestring, sizeof(sys_timestring), timeformat, &mytm);
53 strftime(sys_timestring, sizeof(sys_timestring), timeformat, localtime(&mytime));
55 return sys_timestring;
62 void Sys_AllowProfiling(qbool enable)
66 extern void monstartup(const char *libname);
67 extern void moncleanup(void);
69 monstartup("libmain.so");
73 #elif (defined(__linux__) && (defined(__GLIBC__) || defined(__GNU_LIBRARY__))) || defined(__FreeBSD__)
74 extern int moncontrol(int);
81 ===============================================================================
85 ===============================================================================
88 static qbool Sys_LoadDependencyFunctions(dllhandle_t dllhandle, const dllfunction_t *fcts, qbool complain, qbool has_next)
90 const dllfunction_t *func;
93 for (func = fcts; func && func->name != NULL; func++)
94 if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
98 Con_DPrintf (" - missing function \"%s\" - broken library!", func->name);
100 Con_DPrintf("\nContinuing with");
107 for (func = fcts; func && func->name != NULL; func++)
108 *func->funcvariable = NULL;
113 qbool Sys_LoadSelf(dllhandle_t *handle)
115 dllhandle_t dllhandle = 0;
120 dllhandle = LoadLibrary (NULL);
122 dllhandle = dlopen (NULL, RTLD_NOW | RTLD_GLOBAL);
128 qbool Sys_LoadDependency (const char** dllnames, dllhandle_t* handle, const dllfunction_t *fcts)
131 const dllfunction_t *func;
132 dllhandle_t dllhandle = 0;
139 #ifdef PREFER_PRELOAD
140 dllhandle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
141 if(Sys_LoadDependencyFunctions(dllhandle, fcts, false, false))
143 Con_DPrintf ("All of %s's functions were already linked in! Not loading dynamically...\n", dllnames[0]);
148 Sys_FreeLibrary(&dllhandle);
154 for (func = fcts; func && func->name != NULL; func++)
155 *func->funcvariable = NULL;
157 // Try every possible name
158 Con_DPrintf ("Trying to load library...");
159 for (i = 0; dllnames[i] != NULL; i++)
161 Con_DPrintf (" \"%s\"", dllnames[i]);
163 # ifndef DONT_USE_SETDLLDIRECTORY
165 SetDllDirectory("bin64");
167 SetDllDirectory("bin32");
171 if(Sys_LoadLibrary(dllnames[i], &dllhandle))
173 if (Sys_LoadDependencyFunctions(dllhandle, fcts, true, (dllnames[i+1] != NULL) || (strrchr(sys.argv[0], '/'))))
176 Sys_FreeLibrary (&dllhandle);
180 // see if the names can be loaded relative to the executable path
181 // (this is for Mac OSX which does not check next to the executable)
182 if (!dllhandle && strrchr(sys.argv[0], '/'))
184 char path[MAX_OSPATH];
185 dp_strlcpy(path, sys.argv[0], sizeof(path));
186 strrchr(path, '/')[1] = 0;
187 for (i = 0; dllnames[i] != NULL; i++)
189 char temp[MAX_OSPATH];
190 dp_strlcpy(temp, path, sizeof(temp));
191 dp_strlcat(temp, dllnames[i], sizeof(temp));
192 Con_DPrintf (" \"%s\"", temp);
194 if(Sys_LoadLibrary(temp, &dllhandle))
196 if (Sys_LoadDependencyFunctions(dllhandle, fcts, true, (dllnames[i+1] != NULL) || (strrchr(sys.argv[0], '/'))))
199 Sys_FreeLibrary (&dllhandle);
207 Con_DPrintf(" - failed.\n");
211 Con_DPrintf(" - loaded.\n");
212 Con_Printf("Loaded library \"%s\"\n", dllnames[i]);
221 qbool Sys_LoadLibrary(const char *name, dllhandle_t *handle)
223 dllhandle_t dllhandle = 0;
230 dllhandle = LoadLibrary (name);
232 dllhandle = dlopen (name, RTLD_LAZY | RTLD_GLOBAL);
242 void Sys_FreeLibrary (dllhandle_t* handle)
245 if (handle == NULL || *handle == NULL)
249 FreeLibrary (*handle);
258 void* Sys_GetProcAddress (dllhandle_t handle, const char* name)
262 return (void *)GetProcAddress (handle, name);
264 return (void *)dlsym (handle, name);
272 # define HAVE_TIMEGETTIME 1
273 # define HAVE_QUERYPERFORMANCECOUNTER 1
274 # define HAVE_Sleep 1
278 #if defined(CLOCK_MONOTONIC) || defined(CLOCK_HIRES)
279 # define HAVE_CLOCKGETTIME 1
281 // FIXME improve this check, manpage hints to DST_NONE
282 # define HAVE_GETTIMEOFDAY 1
286 # define HAVE_SELECT 1
290 // FIXME improve this check
291 # define HAVE_USLEEP 1
294 // these are referenced elsewhere
295 cvar_t sys_usenoclockbutbenchmark = {CF_SHARED, "sys_usenoclockbutbenchmark", "0", "don't use ANY real timing, and simulate a clock (for benchmarking); the game then runs as fast as possible. Run a QC mod with bots that does some stuff, then does a quit at the end, to benchmark a server. NEVER do this on a public server."};
296 cvar_t sys_libdir = {CF_READONLY | CF_SHARED, "sys_libdir", "", "Default engine library directory"};
299 static cvar_t sys_debugsleep = {CF_SHARED, "sys_debugsleep", "0", "write requested and attained sleep times to standard output, to be used with gnuplot"};
300 static cvar_t sys_usesdlgetticks = {CF_SHARED, "sys_usesdlgetticks", "0", "use SDL_GetTicks() timer (less accurate, for debugging)"};
301 static cvar_t sys_usesdldelay = {CF_SHARED, "sys_usesdldelay", "0", "use SDL_Delay() (less accurate, for debugging)"};
302 #if HAVE_QUERYPERFORMANCECOUNTER
303 static cvar_t sys_usequeryperformancecounter = {CF_SHARED | CF_ARCHIVE, "sys_usequeryperformancecounter", "0", "use windows QueryPerformanceCounter timer (which has issues on multicore/multiprocessor machines and processors which are designed to conserve power) for timing rather than timeGetTime function (which has issues on some motherboards)"};
305 #if HAVE_CLOCKGETTIME
306 static cvar_t sys_useclockgettime = {CF_SHARED | CF_ARCHIVE, "sys_useclockgettime", "1", "use POSIX clock_gettime function (not adjusted by NTP on some older Linux kernels) for timing rather than gettimeofday (which has issues if the system time is stepped by ntpdate, or apparently on some Xen installations)"};
309 static cvar_t sys_stdout = {CF_SHARED, "sys_stdout", "1", "0: nothing is written to stdout (-nostdout cmdline option sets this), 1: normal messages are written to stdout, 2: normal messages are written to stderr (-stderr cmdline option sets this)"};
311 static cvar_t sys_stdout_blocks = {CF_SHARED, "sys_stdout_blocks", "0", "1: writes to stdout and stderr streams will block (causing a stutter or complete halt) if the buffer is full, ensuring no messages are lost at a price"};
314 static double benchmark_time; // actually always contains an integer amount of milliseconds, will eventually "overflow"
320 Returns the position (1 to argc-1) in the program's argument list
321 where the given parameter apears, or 0 if not present
324 int Sys_CheckParm (const char *parm)
328 for (i=1 ; i<sys.argc ; i++)
331 continue; // NEXTSTEP sometimes clears appkit vars.
332 if (!strcmp (parm,sys.argv[i]))
339 static void Sys_UpdateOutFD_c(cvar_t *var)
341 switch (sys_stdout.integer)
343 case 0: sys.outfd = -1; break;
345 case 1: sys.outfd = fileno(stdout); break;
346 case 2: sys.outfd = fileno(stderr); break;
350 void Sys_Init_Commands (void)
352 Cvar_RegisterVariable(&sys_debugsleep);
353 Cvar_RegisterVariable(&sys_usenoclockbutbenchmark);
354 Cvar_RegisterVariable(&sys_libdir);
355 #if HAVE_TIMEGETTIME || HAVE_QUERYPERFORMANCECOUNTER || HAVE_CLOCKGETTIME || HAVE_GETTIMEOFDAY
356 if(sys_supportsdlgetticks)
358 Cvar_RegisterVariable(&sys_usesdlgetticks);
359 Cvar_RegisterVariable(&sys_usesdldelay);
362 #if HAVE_QUERYPERFORMANCECOUNTER
363 Cvar_RegisterVariable(&sys_usequeryperformancecounter);
365 #if HAVE_CLOCKGETTIME
366 Cvar_RegisterVariable(&sys_useclockgettime);
368 Cvar_RegisterVariable(&sys_stdout);
369 Cvar_RegisterCallback(&sys_stdout, Sys_UpdateOutFD_c);
371 Cvar_RegisterVariable(&sys_stdout_blocks);
375 double Sys_DirtyTime(void)
377 // first all the OPTIONAL timers
379 // benchmark timer (fake clock)
380 if(sys_usenoclockbutbenchmark.integer)
382 double old_benchmark_time = benchmark_time;
384 if(benchmark_time == old_benchmark_time)
385 Sys_Error("sys_usenoclockbutbenchmark cannot run any longer, sorry");
386 return benchmark_time * 0.000001;
388 #if HAVE_QUERYPERFORMANCECOUNTER
389 if (sys_usequeryperformancecounter.integer)
391 // LadyHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
392 // QueryPerformanceCounter
394 // Windows 95/98/ME/NT/2000/XP
396 // very accurate (CPU cycles)
398 // does not necessarily match realtime too well (tends to get faster and faster in win98)
399 // wraps around occasionally on some platforms (depends on CPU speed and probably other unknown factors)
401 LARGE_INTEGER PerformanceFreq;
402 LARGE_INTEGER PerformanceCount;
404 if (QueryPerformanceFrequency (&PerformanceFreq))
406 QueryPerformanceCounter (&PerformanceCount);
408 timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
409 return ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale;
413 Con_Printf("No hardware timer available\n");
414 // fall back to other clock sources
415 Cvar_SetValueQuick(&sys_usequeryperformancecounter, false);
420 #if HAVE_CLOCKGETTIME
421 if (sys_useclockgettime.integer)
424 # ifdef CLOCK_MONOTONIC
426 clock_gettime(CLOCK_MONOTONIC, &ts);
429 clock_gettime(CLOCK_HIGHRES, &ts);
431 return (double) ts.tv_sec + ts.tv_nsec / 1000000000.0;
435 // now all the FALLBACK timers
436 if(sys_supportsdlgetticks && sys_usesdlgetticks.integer)
437 return (double) Sys_SDL_GetTicks() / 1000.0;
438 #if HAVE_GETTIMEOFDAY
441 gettimeofday(&tp, NULL);
442 return (double) tp.tv_sec + tp.tv_usec / 1000000.0;
444 #elif HAVE_TIMEGETTIME
446 static int firsttimegettime = true;
449 // Windows 95/98/ME/NT/2000/XP
451 // reasonable accuracy (millisecond)
453 // wraps around every 47 days or so (but this is non-fatal to us, odd times are rejected, only causes a one frame stutter)
455 // make sure the timer is high precision, otherwise different versions of windows have varying accuracy
456 if (firsttimegettime)
459 firsttimegettime = false;
462 return (double) timeGetTime() / 1000.0;
465 // fallback for using the SDL timer if no other timer is available
466 // this calls Sys_Error() if not linking against SDL
467 return (double) Sys_SDL_GetTicks() / 1000.0;
471 extern cvar_t host_maxwait;
472 double Sys_Sleep(double time)
475 uint32_t microseconds;
477 // convert to microseconds
480 if(host_maxwait.value <= 0)
481 time = min(time, 1000000.0);
483 time = min(time, host_maxwait.value * 1000.0);
485 if (time < 1 || host.restless)
486 return 0; // not sleeping this frame
488 microseconds = time; // post-validation to prevent overflow
490 if(sys_usenoclockbutbenchmark.integer)
492 double old_benchmark_time = benchmark_time;
493 benchmark_time += microseconds;
494 if(benchmark_time == old_benchmark_time)
495 Sys_Error("sys_usenoclockbutbenchmark cannot run any longer, sorry");
499 if(sys_debugsleep.integer)
500 Con_Printf("sys_debugsleep: requesting %u ", microseconds);
501 dt = Sys_DirtyTime();
503 // less important on newer libcurl so no need to disturb dedicated servers
504 if (cls.state != ca_dedicated && Curl_Select(microseconds))
506 // a transfer is ready or we finished sleeping
508 else if(sys_supportsdlgetticks && sys_usesdldelay.integer)
509 Sys_SDL_Delay(microseconds / 1000);
519 if (cls.state == ca_dedicated && sv_checkforpacketsduringsleep.integer)
521 List_For_Each_Entry(s, &lhnet_socketlist.list, lhnetsocket_t, list)
523 if (s->address.addresstype == LHNETADDRESSTYPE_INET4 || s->address.addresstype == LHNETADDRESSTYPE_INET6)
525 if (lastfd < s->inetsocket)
526 lastfd = s->inetsocket;
527 #if defined(WIN32) && !defined(_MSC_VER)
528 FD_SET((int)s->inetsocket, &fdreadset);
530 FD_SET((unsigned int)s->inetsocket, &fdreadset);
535 tv.tv_sec = microseconds / 1000000;
536 tv.tv_usec = microseconds % 1000000;
537 // on Win32, select() cannot be used with all three FD list args being NULL according to MSDN
538 // (so much for POSIX...)
539 // bones_was_here: but a zeroed fd_set seems to be tolerated (tested on Win 7)
540 select(lastfd + 1, &fdreadset, NULL, NULL, &tv);
544 usleep(microseconds);
547 Sleep(microseconds / 1000);
550 Sys_SDL_Delay(microseconds / 1000);
553 dt = Sys_DirtyTime() - dt;
554 if(sys_debugsleep.integer)
555 Con_Printf(" got %u oversleep %d\n", (unsigned int)(dt * 1000000), (unsigned int)(dt * 1000000) - microseconds);
556 return (dt < 0 || dt >= 1800) ? 0 : dt;
561 ===============================================================================
565 ===============================================================================
568 // NOTE: use only POSIX async-signal-safe library functions here (see: man signal-safety)
569 void Sys_Print(const char *text, size_t textlen)
572 if (developer.integer > 0)
574 __android_log_write(ANDROID_LOG_DEBUG, sys.argv[0], text);
580 // BUG: for some reason, NDELAY also affects stdout (1) when used on stdin (0).
581 // this is because both go to /dev/tty by default!
583 int origflags = fcntl(sys.outfd, F_GETFL, 0);
584 if (sys_stdout_blocks.integer)
585 fcntl(sys.outfd, F_SETFL, origflags & ~O_NONBLOCK);
591 fs_offset_t written = (fs_offset_t)write(sys.outfd, text, textlen);
593 break; // sorry, I cannot do anything about this error - without an output
597 if (sys_stdout_blocks.integer)
598 fcntl(sys.outfd, F_SETFL, origflags);
601 //fprintf(stdout, "%s", text);
605 void Sys_Printf(const char *fmt, ...)
608 char msg[MAX_INPUTLINE];
611 va_start(argptr,fmt);
612 msglen = dpvsnprintf(msg, sizeof(msg), fmt, argptr);
616 Sys_Print(msg, msglen);
619 /// Reads a line from POSIX stdin or the Windows console
620 char *Sys_ConsoleInput(void)
622 static char text[MAX_INPUTLINE];
624 static unsigned int len = 0;
649 if (len < sizeof (text) - 1)
658 struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 };
661 FD_SET(fileno(stdin), &fdset);
662 if (select(1, &fdset, NULL, NULL, &timeout) != -1 && FD_ISSET(fileno(stdin), &fdset))
663 return fgets(text, sizeof(text), stdin);
670 ===============================================================================
674 ===============================================================================
677 void Sys_Error (const char *error, ...)
680 char string[MAX_INPUTLINE];
683 // Disable Sys_HandleSignal() but not Sys_HandleCrash()
684 host.state = host_shutdown;
686 // set output to blocking stderr
687 sys.outfd = fileno(stderr);
689 fcntl(sys.outfd, F_SETFL, fcntl(sys.outfd, F_GETFL, 0) & ~O_NONBLOCK);
692 va_start (argptr,error);
693 dpvsnprintf (string, sizeof (string), error, argptr);
696 Con_Printf(CON_ERROR "Engine Aborted: %s\n^9%s\n", string, engineversion);
698 dp_strlcat(string, "\n\n", sizeof(string));
699 dp_strlcat(string, engineversion, sizeof(string));
701 // Most shutdown funcs can't be called here as they could error while we error.
703 // DP8 TODO: send a disconnect message indicating we aborted, see Host_Error() and Sys_HandleCrash()
705 if (cls.demorecording)
706 CL_Stop_f(cmd_local);
709 sv.active = false; // make SV_DropClient() skip the QC stuff to avoid recursive errors
710 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
711 if (host_client->active)
712 SV_DropClient(false, "Server aborted!"); // closes demo file
714 // don't want a dead window left blocking the OS UI or the abort dialog
718 host.state = host_failed; // make Sys_HandleSignal() call _Exit()
719 Sys_SDL_Dialog("Engine Aborted", string);
726 static const char *Sys_FindInPATH(const char *name, char namesep, const char *PATH, char pathsep, char *buf, size_t bufsize)
728 const char *p = PATH;
732 while((q = strchr(p, ':')))
734 dpsnprintf(buf, bufsize, "%.*s%c%s", (int)(q-p), p, namesep, name);
735 if(FS_SysFileExists(buf))
739 if(!q) // none found - try the last item
741 dpsnprintf(buf, bufsize, "%s%c%s", p, namesep, name);
742 if(FS_SysFileExists(buf))
750 static const char *Sys_FindExecutableName(void)
755 static char exenamebuf[MAX_OSPATH+1];
757 #if defined(__FreeBSD__)
758 int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
759 size_t exenamebuflen = sizeof(exenamebuf)-1;
760 if (sysctl(mib, 4, exenamebuf, &exenamebuflen, NULL, 0) == 0)
764 #elif defined(__linux__)
765 n = readlink("/proc/self/exe", exenamebuf, sizeof(exenamebuf)-1);
767 if(n > 0 && (size_t)(n) < sizeof(exenamebuf))
772 if(strchr(sys.argv[0], '/'))
773 return sys.argv[0]; // possibly a relative path
775 return Sys_FindInPATH(sys.argv[0], '/', getenv("PATH"), ':', exenamebuf, sizeof(exenamebuf));
779 void Sys_ProvideSelfFD(void)
783 sys.selffd = FS_SysOpenFD(Sys_FindExecutableName(), "rb", false);
786 // for x86 cpus only... (x64 has SSE2_PRESENT)
787 #if defined(SSE_POSSIBLE) && !defined(SSE2_PRESENT)
788 // code from SDL, shortened as we can expect CPUID to work
789 static int CPUID_Features(void)
792 # if (defined(__GNUC__) || defined(__clang__) || defined(__TINYC__)) && defined(__i386__)
794 " movl %%ebx,%%edi\n"
795 " xorl %%eax,%%eax \n"
797 " cpuid # Get family/model/stepping/features\n"
799 " movl %%edi,%%ebx\n"
802 : "%eax", "%ecx", "%edx", "%edi"
804 # elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
808 cpuid ; Get family/model/stepping/features
812 # error SSE_POSSIBLE set but no CPUID implementation
819 qbool Sys_HaveSSE(void)
821 // COMMANDLINEOPTION: SSE: -nosse disables SSE support and detection
822 if(Sys_CheckParm("-nosse"))
827 // COMMANDLINEOPTION: SSE: -forcesse enables SSE support and disables detection
828 if(Sys_CheckParm("-forcesse") || Sys_CheckParm("-forcesse2"))
830 if(CPUID_Features() & (1 << 25))
836 qbool Sys_HaveSSE2(void)
838 // COMMANDLINEOPTION: SSE2: -nosse2 disables SSE2 support and detection
839 if(Sys_CheckParm("-nosse") || Sys_CheckParm("-nosse2"))
844 // COMMANDLINEOPTION: SSE2: -forcesse2 enables SSE2 support and disables detection
845 if(Sys_CheckParm("-forcesse2"))
847 if((CPUID_Features() & (3 << 25)) == (3 << 25)) // SSE is 1<<25, SSE2 is 1<<26
854 /// called to set process priority for dedicated servers
855 #if defined(__linux__)
856 #include <sys/resource.h>
859 void Sys_InitProcessNice (void)
862 sys.nicepossible = false;
863 if(Sys_CheckParm("-nonice"))
866 sys.nicelevel = getpriority(PRIO_PROCESS, 0);
869 Con_Printf("Kernel does not support reading process priority - cannot use niceness\n");
872 if(getrlimit(RLIMIT_NICE, &lim))
874 Con_Printf("Kernel does not support lowering nice level again - cannot use niceness\n");
877 if(lim.rlim_cur != RLIM_INFINITY && sys.nicelevel < (int) (20 - lim.rlim_cur))
879 Con_Printf("Current nice level is below the soft limit - cannot use niceness\n");
882 sys.nicepossible = true;
885 void Sys_MakeProcessNice (void)
887 if(!sys.nicepossible)
891 Con_DPrintf("Process is becoming 'nice'...\n");
892 if(setpriority(PRIO_PROCESS, 0, 19))
893 Con_Printf(CON_ERROR "Failed to raise nice level to %d\n", 19);
896 void Sys_MakeProcessMean (void)
898 if(!sys.nicepossible)
902 Con_DPrintf("Process is becoming 'mean'...\n");
903 if(setpriority(PRIO_PROCESS, 0, sys.nicelevel))
904 Con_Printf(CON_ERROR "Failed to lower nice level to %d\n", sys.nicelevel);
908 void Sys_InitProcessNice (void)
911 void Sys_MakeProcessNice (void)
914 void Sys_MakeProcessMean (void)
920 static const char *Sys_SigDesc(int sig)
924 // Windows only supports the C99 signals
925 case SIGINT: return "Interrupt";
926 case SIGILL: return "Illegal instruction";
927 case SIGABRT: return "Aborted";
928 case SIGFPE: return "Floating point exception";
929 case SIGSEGV: return "Segmentation fault";
930 case SIGTERM: return "Termination";
932 // POSIX has several others worth catching
933 case SIGHUP: return "Hangup";
934 case SIGQUIT: return "Quit";
935 case SIGBUS: return "Bus error (bad memory access)";
936 case SIGPIPE: return "Broken pipe";
938 default: return "Yo dawg, we bugged out while bugging out";
942 /** Halt and try not to catch fire.
943 * Writing to any file could corrupt it,
944 * any uneccessary code could crash while we crash.
945 * Try to use only POSIX async-signal-safe library functions here (see: man signal-safety).
947 static void Sys_HandleCrash(int sig)
949 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
950 // Before doing anything else grab the stack frame addresses
951 #include <execinfo.h>
952 void *stackframes[32];
953 int framecount = backtrace(stackframes, 32);
956 char dialogtext[3072];
959 // Break any loop and disable Sys_HandleSignal()
960 if (host.state == host_failing || host.state == host_failed)
962 host.state = host_failing;
964 sigdesc = Sys_SigDesc(sig);
966 // set output to blocking stderr and print header, backtrace, version
967 sys.outfd = fileno(stderr); // not async-signal-safe :(
969 fcntl(sys.outfd, F_SETFL, fcntl(sys.outfd, F_GETFL, 0) & ~O_NONBLOCK);
970 Sys_Print("\n\n\e[1;37;41m Engine Crash: ", 30);
971 Sys_Print(sigdesc, strlen(sigdesc));
972 Sys_Print(" \e[m\n", 8);
973 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
974 // the first two addresses will be in this function and in signal() in libc
975 backtrace_symbols_fd(stackframes + 2, framecount - 2, sys.outfd);
977 Sys_Print("\e[1m", 4);
978 Sys_Print(engineversion, strlen(engineversion));
979 Sys_Print("\e[m\n", 4);
980 #else // Windows console doesn't support colours
981 Sys_Print("\n\nEngine Crash: ", 16);
982 Sys_Print(sigdesc, strlen(sigdesc));
984 Sys_Print(engineversion, strlen(engineversion));
988 // DP8 TODO: send a disconnect message indicating we crashed, see Sys_Error() and Host_Error()
990 // don't want a dead window left blocking the OS UI or the crash dialog
994 // prepare the dialogtext: signal, backtrace, version
995 // the dp_st* funcs are POSIX async-signal-safe IF we don't trigger their warnings
996 dp_strlcpy(dialogtext, sigdesc, sizeof(dialogtext));
997 dp_strlcat(dialogtext, "\n\n", sizeof(dialogtext));
998 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
999 btstrings = backtrace_symbols(stackframes + 2, framecount - 2); // calls malloc :(
1001 for (int i = 0; i < framecount - 2; ++i)
1003 dp_strlcat(dialogtext, btstrings[i], sizeof(dialogtext));
1004 dp_strlcat(dialogtext, "\n", sizeof(dialogtext));
1007 dp_strlcat(dialogtext, "\n", sizeof(dialogtext));
1008 dp_strlcat(dialogtext, engineversion, sizeof(dialogtext));
1010 host.state = host_failed; // make Sys_HandleSignal() call _Exit()
1011 Sys_SDL_Dialog("Engine Crash", dialogtext);
1013 fflush(stderr); // not async-signal-safe :(
1017 static void Sys_HandleSignal(int sig)
1019 const char *sigdesc;
1021 // Break any loop, eg if each Sys_Print triggers a SIGPIPE
1022 if (host.state == host_shutdown || host.state == host_failing)
1025 sigdesc = Sys_SigDesc(sig);
1026 Sys_Print("\nReceived ", 10);
1027 Sys_Print(sigdesc, strlen(sigdesc));
1028 Sys_Print(" signal, exiting...\n", 20);
1029 if (host.state == host_failed)
1031 // user is trying to kill the process while the SDL dialog is open
1032 fflush(stderr); // not async-signal-safe :(
1035 host.state = host_shutdown;
1038 /// SDL2 only handles SIGINT and SIGTERM by default and doesn't log anything
1039 static void Sys_InitSignals(void)
1041 // Windows only supports the C99 signals
1042 signal(SIGINT, Sys_HandleSignal);
1043 signal(SIGILL, Sys_HandleCrash);
1044 signal(SIGABRT, Sys_HandleCrash);
1045 signal(SIGFPE, Sys_HandleCrash);
1046 signal(SIGSEGV, Sys_HandleCrash);
1047 signal(SIGTERM, Sys_HandleSignal);
1049 // POSIX has several others worth catching
1050 signal(SIGHUP, Sys_HandleSignal);
1051 signal(SIGQUIT, Sys_HandleSignal);
1052 signal(SIGBUS, Sys_HandleCrash);
1053 signal(SIGPIPE, Sys_HandleSignal);
1057 int main (int argc, char **argv)
1060 sys.argv = (const char **)argv;
1062 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
1063 // COMMANDLINEOPTION: -noterminal disables console output on stdout
1064 if(Sys_CheckParm("-noterminal") || Sys_CheckParm("-nostdout"))
1065 sys_stdout.string = "0";
1066 // COMMANDLINEOPTION: -stderr moves console output to stderr
1067 else if(Sys_CheckParm("-stderr"))
1068 sys_stdout.string = "2";
1069 // too early for Cvar_SetQuick
1070 sys_stdout.value = sys_stdout.integer = atoi(sys_stdout.string);
1071 Sys_UpdateOutFD_c(&sys_stdout);
1073 fcntl(fileno(stdin), F_SETFL, fcntl(fileno(stdin), F_GETFL, 0) | O_NONBLOCK);
1074 // stdout/stderr will be set to blocking in Sys_Print() if so configured, or during a fatal error.
1075 fcntl(fileno(stdout), F_SETFL, fcntl(fileno(stdout), F_GETFL, 0) | O_NONBLOCK);
1076 fcntl(fileno(stderr), F_SETFL, fcntl(fileno(stderr), F_GETFL, 0) | O_NONBLOCK);
1080 Sys_ProvideSelfFD(); // may call Con_Printf() so must be after sys.outfd is set
1083 Sys_AllowProfiling(true);
1091 Sys_AllowProfiling(false);
1095 fcntl(fileno(stdout), F_SETFL, fcntl(fileno(stdout), F_GETFL, 0) & ~O_NONBLOCK);
1096 fcntl(fileno(stderr), F_SETFL, fcntl(fileno(stderr), F_GETFL, 0) & ~O_NONBLOCK);