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_Abort("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_Abort() 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_Abort("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_Abort (const char *error, ...)
680 char string[MAX_INPUTLINE];
683 // set output to blocking stderr
684 sys.outfd = fileno(stderr);
686 fcntl(sys.outfd, F_SETFL, fcntl(sys.outfd, F_GETFL, 0) & ~O_NONBLOCK);
689 va_start (argptr,error);
690 dpvsnprintf (string, sizeof (string), error, argptr);
693 Con_Printf(CON_ERROR "Engine Abort: %s\n^9%s\n", string, engineversion);
695 dp_strlcat(string, "\n\n", sizeof(string));
696 dp_strlcat(string, engineversion, sizeof(string));
698 // Most shutdown funcs can't be called here as they could error while we error.
700 // DP8 TODO: send a disconnect message indicating we aborted, see Host_Error() and Sys_HandleCrash()
702 if (cls.demorecording)
703 CL_Stop_f(cmd_local);
706 sv.active = false; // make SV_DropClient() skip the QC stuff to avoid recursive errors
707 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
708 if (host_client->active)
709 SV_DropClient(false, "Server abort!"); // closes demo file
711 // don't want a dead window left blocking the OS UI or the abort dialog
715 host.state = host_failed; // make Sys_HandleSignal() call exit()
716 Sys_SDL_Dialog("Engine Abort", string);
724 static const char *Sys_FindInPATH(const char *name, char namesep, const char *PATH, char pathsep, char *buf, size_t bufsize)
726 const char *p = PATH;
730 while((q = strchr(p, ':')))
732 dpsnprintf(buf, bufsize, "%.*s%c%s", (int)(q-p), p, namesep, name);
733 if(FS_SysFileExists(buf))
737 if(!q) // none found - try the last item
739 dpsnprintf(buf, bufsize, "%s%c%s", p, namesep, name);
740 if(FS_SysFileExists(buf))
748 static const char *Sys_FindExecutableName(void)
753 static char exenamebuf[MAX_OSPATH+1];
755 #if defined(__FreeBSD__)
756 int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
757 size_t exenamebuflen = sizeof(exenamebuf)-1;
758 if (sysctl(mib, 4, exenamebuf, &exenamebuflen, NULL, 0) == 0)
762 #elif defined(__linux__)
763 n = readlink("/proc/self/exe", exenamebuf, sizeof(exenamebuf)-1);
765 if(n > 0 && (size_t)(n) < sizeof(exenamebuf))
770 if(strchr(sys.argv[0], '/'))
771 return sys.argv[0]; // possibly a relative path
773 return Sys_FindInPATH(sys.argv[0], '/', getenv("PATH"), ':', exenamebuf, sizeof(exenamebuf));
777 void Sys_ProvideSelfFD(void)
781 sys.selffd = FS_SysOpenFD(Sys_FindExecutableName(), "rb", false);
784 // for x86 cpus only... (x64 has SSE2_PRESENT)
785 #if defined(SSE_POSSIBLE) && !defined(SSE2_PRESENT)
786 // code from SDL, shortened as we can expect CPUID to work
787 static int CPUID_Features(void)
790 # if (defined(__GNUC__) || defined(__clang__) || defined(__TINYC__)) && defined(__i386__)
792 " movl %%ebx,%%edi\n"
793 " xorl %%eax,%%eax \n"
795 " cpuid # Get family/model/stepping/features\n"
797 " movl %%edi,%%ebx\n"
800 : "%eax", "%ecx", "%edx", "%edi"
802 # elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
806 cpuid ; Get family/model/stepping/features
810 # error SSE_POSSIBLE set but no CPUID implementation
817 qbool Sys_HaveSSE(void)
819 // COMMANDLINEOPTION: SSE: -nosse disables SSE support and detection
820 if(Sys_CheckParm("-nosse"))
825 // COMMANDLINEOPTION: SSE: -forcesse enables SSE support and disables detection
826 if(Sys_CheckParm("-forcesse") || Sys_CheckParm("-forcesse2"))
828 if(CPUID_Features() & (1 << 25))
834 qbool Sys_HaveSSE2(void)
836 // COMMANDLINEOPTION: SSE2: -nosse2 disables SSE2 support and detection
837 if(Sys_CheckParm("-nosse") || Sys_CheckParm("-nosse2"))
842 // COMMANDLINEOPTION: SSE2: -forcesse2 enables SSE2 support and disables detection
843 if(Sys_CheckParm("-forcesse2"))
845 if((CPUID_Features() & (3 << 25)) == (3 << 25)) // SSE is 1<<25, SSE2 is 1<<26
852 /// called to set process priority for dedicated servers
853 #if defined(__linux__)
854 #include <sys/resource.h>
857 void Sys_InitProcessNice (void)
860 sys.nicepossible = false;
861 if(Sys_CheckParm("-nonice"))
864 sys.nicelevel = getpriority(PRIO_PROCESS, 0);
867 Con_Printf("Kernel does not support reading process priority - cannot use niceness\n");
870 if(getrlimit(RLIMIT_NICE, &lim))
872 Con_Printf("Kernel does not support lowering nice level again - cannot use niceness\n");
875 if(lim.rlim_cur != RLIM_INFINITY && sys.nicelevel < (int) (20 - lim.rlim_cur))
877 Con_Printf("Current nice level is below the soft limit - cannot use niceness\n");
880 sys.nicepossible = true;
883 void Sys_MakeProcessNice (void)
885 if(!sys.nicepossible)
889 Con_DPrintf("Process is becoming 'nice'...\n");
890 if(setpriority(PRIO_PROCESS, 0, 19))
891 Con_Printf(CON_ERROR "Failed to raise nice level to %d\n", 19);
894 void Sys_MakeProcessMean (void)
896 if(!sys.nicepossible)
900 Con_DPrintf("Process is becoming 'mean'...\n");
901 if(setpriority(PRIO_PROCESS, 0, sys.nicelevel))
902 Con_Printf(CON_ERROR "Failed to lower nice level to %d\n", sys.nicelevel);
906 void Sys_InitProcessNice (void)
909 void Sys_MakeProcessNice (void)
912 void Sys_MakeProcessMean (void)
918 static const char *Sys_SigDesc(int sig)
922 // Windows only supports the C99 signals
923 case SIGINT: return "Interrupt";
924 case SIGILL: return "Illegal instruction";
925 case SIGABRT: return "Aborted";
926 case SIGFPE: return "Floating point exception";
927 case SIGSEGV: return "Segmentation fault";
928 case SIGTERM: return "Termination";
930 // POSIX has several others worth catching
931 case SIGHUP: return "Hangup";
932 case SIGQUIT: return "Quit";
933 case SIGBUS: return "Bus error (bad memory access)";
934 case SIGPIPE: return "Broken pipe";
936 default: return "Yo dawg, we bugged out while bugging out";
940 /** Halt and try not to catch fire.
941 * Writing to any file could corrupt it,
942 * any uneccessary code could crash while we crash.
943 * Try to use only POSIX async-signal-safe library functions here (see: man signal-safety).
945 static void Sys_HandleCrash(int sig)
947 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
948 // Before doing anything else grab the stack frame addresses
949 #include <execinfo.h>
950 void *stackframes[32];
951 int framecount = backtrace(stackframes, 32);
954 char dialogtext[3072];
955 const char *sigdesc = Sys_SigDesc(sig);
957 // set output to blocking stderr and print header, backtrace, version
958 sys.outfd = fileno(stderr); // not async-signal-safe :(
960 fcntl(sys.outfd, F_SETFL, fcntl(sys.outfd, F_GETFL, 0) & ~O_NONBLOCK);
961 Sys_Print("\n\n\e[1;37;41m Engine Crash: ", 30);
962 Sys_Print(sigdesc, strlen(sigdesc));
963 Sys_Print(" \e[m\n", 8);
964 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
965 // the first two addresses will be in this function and in signal() in libc
966 backtrace_symbols_fd(stackframes + 2, framecount - 2, sys.outfd);
968 Sys_Print("\e[1m", 4);
969 Sys_Print(engineversion, strlen(engineversion));
970 Sys_Print("\e[m\n", 4);
971 #else // Windows console doesn't support colours
972 Sys_Print("\n\nEngine Crash: ", 16);
973 Sys_Print(sigdesc, strlen(sigdesc));
975 Sys_Print(engineversion, strlen(engineversion));
979 // DP8 TODO: send a disconnect message indicating we crashed, see Sys_Abort() and Host_Error()
981 // don't want a dead window left blocking the OS UI or the crash dialog
985 // prepare the dialogtext: signal, backtrace, version
986 // the dp_st* funcs are POSIX async-signal-safe IF we don't trigger their warnings
987 dp_strlcpy(dialogtext, sigdesc, sizeof(dialogtext));
988 dp_strlcat(dialogtext, "\n\n", sizeof(dialogtext));
989 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
990 btstrings = backtrace_symbols(stackframes + 2, framecount - 2); // calls malloc :(
992 for (int i = 0; i < framecount - 2; ++i)
994 dp_strlcat(dialogtext, btstrings[i], sizeof(dialogtext));
995 dp_strlcat(dialogtext, "\n", sizeof(dialogtext));
998 dp_strlcat(dialogtext, "\n", sizeof(dialogtext));
999 dp_strlcat(dialogtext, engineversion, sizeof(dialogtext));
1001 host.state = host_failed; // make Sys_HandleSignal() call _Exit()
1002 Sys_SDL_Dialog("Engine Crash", dialogtext);
1004 fflush(stderr); // not async-signal-safe :(
1008 static void Sys_HandleSignal(int sig)
1010 const char *sigdesc = Sys_SigDesc(sig);
1011 Sys_Print("\nReceived ", 10);
1012 Sys_Print(sigdesc, strlen(sigdesc));
1013 Sys_Print(" signal, exiting...\n", 20);
1014 if (host.state == host_failed)
1016 // user is trying to kill the process while the dialog is open
1017 fflush(stderr); // not async-signal-safe :(
1020 host.state = host_shutdown;
1023 /// SDL2 only handles SIGINT and SIGTERM by default and doesn't log anything
1024 static void Sys_InitSignals(void)
1026 // Windows only supports the C99 signals
1027 signal(SIGINT, Sys_HandleSignal);
1028 signal(SIGILL, Sys_HandleCrash);
1029 signal(SIGABRT, Sys_HandleCrash);
1030 signal(SIGFPE, Sys_HandleCrash);
1031 signal(SIGSEGV, Sys_HandleCrash);
1032 signal(SIGTERM, Sys_HandleSignal);
1034 // POSIX has several others worth catching
1035 signal(SIGHUP, Sys_HandleSignal);
1036 signal(SIGQUIT, Sys_HandleSignal);
1037 signal(SIGBUS, Sys_HandleCrash);
1038 signal(SIGPIPE, Sys_HandleSignal);
1042 int main (int argc, char **argv)
1045 sys.argv = (const char **)argv;
1047 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
1048 // COMMANDLINEOPTION: -noterminal disables console output on stdout
1049 if(Sys_CheckParm("-noterminal") || Sys_CheckParm("-nostdout"))
1050 sys_stdout.string = "0";
1051 // COMMANDLINEOPTION: -stderr moves console output to stderr
1052 else if(Sys_CheckParm("-stderr"))
1053 sys_stdout.string = "2";
1054 // too early for Cvar_SetQuick
1055 sys_stdout.value = sys_stdout.integer = atoi(sys_stdout.string);
1056 Sys_UpdateOutFD_c(&sys_stdout);
1058 fcntl(fileno(stdin), F_SETFL, fcntl(fileno(stdin), F_GETFL, 0) | O_NONBLOCK);
1059 // stdout/stderr will be set to blocking in Sys_Print() if so configured, or during a fatal error.
1060 fcntl(fileno(stdout), F_SETFL, fcntl(fileno(stdout), F_GETFL, 0) | O_NONBLOCK);
1061 fcntl(fileno(stderr), F_SETFL, fcntl(fileno(stderr), F_GETFL, 0) | O_NONBLOCK);
1065 Sys_ProvideSelfFD(); // may call Con_Printf() so must be after sys.outfd is set
1068 Sys_AllowProfiling(true);
1076 Sys_AllowProfiling(false);
1080 fcntl(fileno(stdout), F_SETFL, fcntl(fileno(stdout), F_GETFL, 0) & ~O_NONBLOCK);
1081 fcntl(fileno(stderr), F_SETFL, fcntl(fileno(stderr), F_GETFL, 0) & ~O_NONBLOCK);