1 2 /* 3 Routines to handle signals the program will receive. 4 Usually this will call the error handlers. 5 */ 6 #include <petsc/private/petscimpl.h> /*I "petscsys.h" I*/ 7 #include <signal.h> 8 #include <stdlib.h> /* for _Exit() */ 9 10 static PetscClassId SIGNAL_CLASSID = 0; 11 12 struct SH { 13 PetscClassId classid; 14 PetscErrorCode (*handler)(int,void*); 15 void *ctx; 16 struct SH *previous; 17 }; 18 static struct SH *sh = NULL; 19 static PetscBool SignalSet = PETSC_FALSE; 20 21 /* Called by MPI_Abort() to suppress user-registered atexit()/on_exit() functions. 22 See discussion at https://gitlab.com/petsc/petsc/-/merge_requests/2745. 23 */ 24 static void MyExit(void) 25 { 26 _Exit(MPI_ERR_OTHER); 27 } 28 29 /* 30 PetscSignalHandler_Private - This is the signal handler called by the system. This calls 31 any signal handler set by PETSc or the application code. 32 33 Input Parameters: (depends on system) 34 . sig - integer code indicating the type of signal 35 . code - ?? 36 . sigcontext - ?? 37 . addr - ?? 38 39 */ 40 #if defined(PETSC_HAVE_4ARG_SIGNAL_HANDLER) 41 static void PetscSignalHandler_Private(int sig,int code,struct sigcontext * scp,char *addr) 42 #else 43 static void PetscSignalHandler_Private(int sig) 44 #endif 45 { 46 PetscErrorCode ierr; 47 48 PetscFunctionBegin; 49 if (!sh || !sh->handler) ierr = PetscSignalHandlerDefault(sig,(void*)0); 50 else { 51 if (sh->classid != SIGNAL_CLASSID) SETERRABORT(PETSC_COMM_WORLD,PETSC_ERR_COR,"Signal object has been corrupted"); 52 ierr = (*sh->handler)(sig,sh->ctx); 53 } 54 if (ierr) PETSCABORT(PETSC_COMM_WORLD,PETSC_ERR_COR); 55 } 56 57 /*@ 58 PetscSignalHandlerDefault - Default signal handler. 59 60 Not Collective 61 62 Level: advanced 63 64 Input Parameters: 65 + sig - signal value 66 - ptr - unused pointer 67 68 @*/ 69 PetscErrorCode PetscSignalHandlerDefault(int sig,void *ptr) 70 { 71 PetscErrorCode ierr; 72 const char *SIGNAME[64]; 73 74 PetscFunctionBegin; 75 if (sig == SIGSEGV) PetscSignalSegvCheckPointerOrMpi(); 76 SIGNAME[0] = "Unknown signal"; 77 #if !defined(PETSC_MISSING_SIGABRT) 78 SIGNAME[SIGABRT] = "Abort"; 79 #endif 80 #if !defined(PETSC_MISSING_SIGALRM) 81 SIGNAME[SIGALRM] = "Alarm"; 82 #endif 83 #if !defined(PETSC_MISSING_SIGBUS) 84 SIGNAME[SIGBUS] = "BUS: Bus Error, possibly illegal memory access"; 85 #endif 86 #if !defined(PETSC_MISSING_SIGCHLD) 87 SIGNAME[SIGCHLD] = "CHLD"; 88 #endif 89 #if !defined(PETSC_MISSING_SIGCONT) 90 SIGNAME[SIGCONT] = "CONT"; 91 #endif 92 #if !defined(PETSC_MISSING_SIGFPE) 93 SIGNAME[SIGFPE] = "FPE: Floating Point Exception,probably divide by zero"; 94 #endif 95 #if !defined(PETSC_MISSING_SIGHUP) 96 SIGNAME[SIGHUP] = "Hang up: Some other process (or the batch system) has told this process to end"; 97 #endif 98 #if !defined(PETSC_MISSING_SIGILL) 99 SIGNAME[SIGILL] = "Illegal instruction: Likely due to memory corruption"; 100 #endif 101 #if !defined(PETSC_MISSING_SIGINT) 102 SIGNAME[SIGINT] = "Interrupt"; 103 #endif 104 #if !defined(PETSC_MISSING_SIGKILL) 105 SIGNAME[SIGKILL] = "Kill: Some other process (or the batch system) has told this process to end"; 106 #endif 107 #if !defined(PETSC_MISSING_SIGPIPE) 108 SIGNAME[SIGPIPE] = "Broken Pipe: Likely while reading or writing to a socket"; 109 #endif 110 #if !defined(PETSC_MISSING_SIGQUIT) 111 SIGNAME[SIGQUIT] = "Quit: Some other process (or the batch system) has told this process to end"; 112 #endif 113 #if !defined(PETSC_MISSING_SIGSEGV) 114 SIGNAME[SIGSEGV] = "SEGV: Segmentation Violation, probably memory access out of range"; 115 #endif 116 #if !defined(PETSC_MISSING_SIGSYS) 117 SIGNAME[SIGSYS] = "SYS"; 118 #endif 119 #if !defined(PETSC_MISSING_SIGTERM) 120 SIGNAME[SIGTERM] = "Terminate: Some process (or the batch system) has told this process to end"; 121 #endif 122 #if !defined(PETSC_MISSING_SIGTRAP) 123 SIGNAME[SIGTRAP] = "TRAP"; 124 #endif 125 #if !defined(PETSC_MISSING_SIGTSTP) 126 SIGNAME[SIGTSTP] = "TSTP"; 127 #endif 128 #if !defined(PETSC_MISSING_SIGURG) 129 SIGNAME[SIGURG] = "URG"; 130 #endif 131 #if !defined(PETSC_MISSING_SIGUSR1) 132 SIGNAME[SIGUSR1] = "User 1"; 133 #endif 134 #if !defined(PETSC_MISSING_SIGUSR2) 135 SIGNAME[SIGUSR2] = "User 2"; 136 #endif 137 138 signal(sig,SIG_DFL); 139 (*PetscErrorPrintf)("------------------------------------------------------------------------\n"); 140 if (sig >= 0 && sig <= 20) (*PetscErrorPrintf)("Caught signal number %d %s\n",sig,SIGNAME[sig]); 141 else (*PetscErrorPrintf)("Caught signal\n"); 142 143 (*PetscErrorPrintf)("Try option -start_in_debugger or -on_error_attach_debugger\n"); 144 (*PetscErrorPrintf)("or see https://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind\n"); 145 (*PetscErrorPrintf)("or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors\n"); 146 if (PetscDefined(USE_DEBUG)) { 147 if (!PetscStackActive()) (*PetscErrorPrintf)(" or try option -log_stack\n"); 148 else { 149 PetscStackPop; /* remove stack frames for error handlers */ 150 PetscStackPop; 151 (*PetscErrorPrintf)("likely location of problem given in stack below\n"); 152 (*PetscErrorPrintf)("--------------------- Stack Frames ------------------------------------\n"); 153 PetscStackView(PETSC_STDOUT); 154 } 155 } else { 156 (*PetscErrorPrintf)("configure using --with-debugging=yes, recompile, link, and run \n"); 157 (*PetscErrorPrintf)("to get more information on the crash.\n"); 158 } 159 ierr = PetscError(PETSC_COMM_SELF,0,"User provided function"," unknown file",PETSC_ERR_SIG,PETSC_ERROR_INITIAL,NULL); 160 #if !defined(PETSC_MISSING_SIGBUS) 161 if (sig == SIGSEGV || sig == SIGBUS) { 162 #else 163 if (sig == SIGSEGV) { 164 #endif 165 PetscBool debug; 166 167 PetscMallocGetDebug(&debug,NULL,NULL); 168 if (debug) { 169 (*PetscErrorPrintf)("Checking the memory for corruption.\n"); 170 PetscMallocValidate(__LINE__,PETSC_FUNCTION_NAME,__FILE__); 171 } else { 172 (*PetscErrorPrintf)("Run with -malloc_debug to check if memory corruption is causing the crash.\n"); 173 } 174 } 175 atexit(MyExit); 176 PETSCABORT(PETSC_COMM_WORLD,(int)ierr); 177 PetscFunctionReturn(0); 178 } 179 180 #if !defined(PETSC_SIGNAL_CAST) 181 #define PETSC_SIGNAL_CAST 182 #endif 183 184 /*@C 185 PetscPushSignalHandler - Catches the usual fatal errors and 186 calls a user-provided routine. 187 188 Not Collective 189 190 Input Parameter: 191 + routine - routine to call when a signal is received 192 - ctx - optional context needed by the routine 193 194 Level: developer 195 196 .seealso: PetscPopSignalHandler(), PetscSignalHandlerDefault(), PetscPushErrorHandler() 197 198 @*/ 199 PetscErrorCode PetscPushSignalHandler(PetscErrorCode (*routine)(int,void*),void *ctx) 200 { 201 struct SH *newsh; 202 PetscErrorCode ierr; 203 204 PetscFunctionBegin; 205 if (!SIGNAL_CLASSID) { 206 /* ierr = PetscClassIdRegister("Signal",&SIGNAL_CLASSID);CHKERRQ(ierr); */ 207 SIGNAL_CLASSID = 19; 208 } 209 if (!SignalSet && routine) { 210 /* Do not catch ABRT, CHLD, KILL */ 211 #if !defined(PETSC_MISSING_SIGALRM) 212 /* signal(SIGALRM, PETSC_SIGNAL_CAST PetscSignalHandler_Private); */ 213 #endif 214 #if !defined(PETSC_MISSING_SIGBUS) 215 signal(SIGBUS, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 216 #endif 217 #if !defined(PETSC_MISSING_SIGCONT) 218 /*signal(SIGCONT, PETSC_SIGNAL_CAST PetscSignalHandler_Private);*/ 219 #endif 220 #if !defined(PETSC_MISSING_SIGFPE) 221 signal(SIGFPE, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 222 #endif 223 #if !defined(PETSC_MISSING_SIGHUP) && defined(PETSC_HAVE_STRUCT_SIGACTION) 224 { 225 struct sigaction action; 226 sigaction(SIGHUP,NULL,&action); 227 if (action.sa_handler == SIG_IGN) { 228 ierr = PetscInfo(NULL,"SIGHUP previously set to ignore, therefor not changing its signal handler\n");CHKERRQ(ierr); 229 } else { 230 signal(SIGHUP, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 231 } 232 } 233 #endif 234 #if !defined(PETSC_MISSING_SIGILL) 235 signal(SIGILL, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 236 #endif 237 #if !defined(PETSC_MISSING_SIGINT) 238 /* signal(SIGINT, PETSC_SIGNAL_CAST PetscSignalHandler_Private); */ 239 #endif 240 #if !defined(PETSC_MISSING_SIGPIPE) 241 signal(SIGPIPE, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 242 #endif 243 #if !defined(PETSC_MISSING_SIGQUIT) 244 signal(SIGQUIT, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 245 #endif 246 #if !defined(PETSC_MISSING_SIGSEGV) 247 signal(SIGSEGV, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 248 #endif 249 #if !defined(PETSC_MISSING_SIGSYS) 250 signal(SIGSYS, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 251 #endif 252 #if !defined(PETSC_MISSING_SIGTERM) 253 signal(SIGTERM, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 254 #endif 255 #if !defined(PETSC_MISSING_SIGTRAP) 256 signal(SIGTRAP, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 257 #endif 258 #if !defined(PETSC_MISSING_SIGTSTP) 259 /* signal(SIGTSTP, PETSC_SIGNAL_CAST PetscSignalHandler_Private); */ 260 #endif 261 #if !defined(PETSC_MISSING_SIGURG) 262 signal(SIGURG, PETSC_SIGNAL_CAST PetscSignalHandler_Private); 263 #endif 264 #if !defined(PETSC_MISSING_SIGUSR1) 265 /* signal(SIGUSR1, PETSC_SIGNAL_CAST PetscSignalHandler_Private); */ 266 #endif 267 #if !defined(PETSC_MISSING_SIGUSR2) 268 /* signal(SIGUSR2, PETSC_SIGNAL_CAST PetscSignalHandler_Private); */ 269 #endif 270 SignalSet = PETSC_TRUE; 271 } 272 if (!routine) { 273 #if !defined(PETSC_MISSING_SIGALRM) 274 /* signal(SIGALRM, SIG_DFL); */ 275 #endif 276 #if !defined(PETSC_MISSING_SIGBUS) 277 signal(SIGBUS, SIG_DFL); 278 #endif 279 #if !defined(PETSC_MISSING_SIGCONT) 280 /* signal(SIGCONT, SIG_DFL); */ 281 #endif 282 #if !defined(PETSC_MISSING_SIGFPE) 283 signal(SIGFPE, SIG_DFL); 284 #endif 285 #if !defined(PETSC_MISSING_SIGHUP) 286 signal(SIGHUP, SIG_DFL); 287 #endif 288 #if !defined(PETSC_MISSING_SIGILL) 289 signal(SIGILL, SIG_DFL); 290 #endif 291 #if !defined(PETSC_MISSING_SIGINT) 292 /* signal(SIGINT, SIG_DFL); */ 293 #endif 294 #if !defined(PETSC_MISSING_SIGPIPE) 295 signal(SIGPIPE, SIG_DFL); 296 #endif 297 #if !defined(PETSC_MISSING_SIGQUIT) 298 signal(SIGQUIT, SIG_DFL); 299 #endif 300 #if !defined(PETSC_MISSING_SIGSEGV) 301 signal(SIGSEGV, SIG_DFL); 302 #endif 303 #if !defined(PETSC_MISSING_SIGSYS) 304 signal(SIGSYS, SIG_DFL); 305 #endif 306 #if !defined(PETSC_MISSING_SIGTERM) 307 signal(SIGTERM, SIG_DFL); 308 #endif 309 #if !defined(PETSC_MISSING_SIGTRAP) 310 signal(SIGTRAP, SIG_DFL); 311 #endif 312 #if !defined(PETSC_MISSING_SIGTSTP) 313 /* signal(SIGTSTP, SIG_DFL); */ 314 #endif 315 #if !defined(PETSC_MISSING_SIGURG) 316 signal(SIGURG, SIG_DFL); 317 #endif 318 #if !defined(PETSC_MISSING_SIGUSR1) 319 /* signal(SIGUSR1, SIG_DFL); */ 320 #endif 321 #if !defined(PETSC_MISSING_SIGUSR2) 322 /* signal(SIGUSR2, SIG_DFL); */ 323 #endif 324 SignalSet = PETSC_FALSE; 325 } 326 ierr = PetscNew(&newsh);CHKERRQ(ierr); 327 if (sh) { 328 if (sh->classid != SIGNAL_CLASSID) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_COR,"Signal object has been corrupted"); 329 newsh->previous = sh; 330 } else newsh->previous = NULL; 331 newsh->handler = routine; 332 newsh->ctx = ctx; 333 newsh->classid = SIGNAL_CLASSID; 334 sh = newsh; 335 PetscFunctionReturn(0); 336 } 337 338 /*@ 339 PetscPopSignalHandler - Removes the most last signal handler that was pushed. 340 If no signal handlers are left on the stack it will remove the PETSc signal handler. 341 (That is PETSc will no longer catch signals). 342 343 Not Collective 344 345 Level: developer 346 347 .seealso: PetscPushSignalHandler() 348 349 @*/ 350 PetscErrorCode PetscPopSignalHandler(void) 351 { 352 struct SH *tmp; 353 PetscErrorCode ierr; 354 355 PetscFunctionBegin; 356 if (!sh) PetscFunctionReturn(0); 357 if (sh->classid != SIGNAL_CLASSID) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_COR,"Signal object has been corrupted"); 358 359 tmp = sh; 360 sh = sh->previous; 361 ierr = PetscFree(tmp);CHKERRQ(ierr); 362 if (!sh || !sh->handler) { 363 #if !defined(PETSC_MISSING_SIGALRM) 364 /* signal(SIGALRM, SIG_DFL); */ 365 #endif 366 #if !defined(PETSC_MISSING_SIGBUS) 367 signal(SIGBUS, SIG_DFL); 368 #endif 369 #if !defined(PETSC_MISSING_SIGCONT) 370 /* signal(SIGCONT, SIG_DFL); */ 371 #endif 372 #if !defined(PETSC_MISSING_SIGFPE) 373 signal(SIGFPE, SIG_DFL); 374 #endif 375 #if !defined(PETSC_MISSING_SIGHUP) 376 signal(SIGHUP, SIG_DFL); 377 #endif 378 #if !defined(PETSC_MISSING_SIGILL) 379 signal(SIGILL, SIG_DFL); 380 #endif 381 #if !defined(PETSC_MISSING_SIGINT) 382 /* signal(SIGINT, SIG_DFL); */ 383 #endif 384 #if !defined(PETSC_MISSING_SIGPIPE) 385 signal(SIGPIPE, SIG_DFL); 386 #endif 387 #if !defined(PETSC_MISSING_SIGQUIT) 388 signal(SIGQUIT, SIG_DFL); 389 #endif 390 #if !defined(PETSC_MISSING_SIGSEGV) 391 signal(SIGSEGV, SIG_DFL); 392 #endif 393 #if !defined(PETSC_MISSING_SIGSYS) 394 signal(SIGSYS, SIG_DFL); 395 #endif 396 #if !defined(PETSC_MISSING_SIGTERM) 397 signal(SIGTERM, SIG_DFL); 398 #endif 399 #if !defined(PETSC_MISSING_SIGTRAP) 400 signal(SIGTRAP, SIG_DFL); 401 #endif 402 #if !defined(PETSC_MISSING_SIGTSTP) 403 /* signal(SIGTSTP, SIG_DFL); */ 404 #endif 405 #if !defined(PETSC_MISSING_SIGURG) 406 signal(SIGURG, SIG_DFL); 407 #endif 408 #if !defined(PETSC_MISSING_SIGUSR1) 409 /* signal(SIGUSR1, SIG_DFL); */ 410 #endif 411 #if !defined(PETSC_MISSING_SIGUSR2) 412 /* signal(SIGUSR2, SIG_DFL); */ 413 #endif 414 SignalSet = PETSC_FALSE; 415 } else { 416 SignalSet = PETSC_TRUE; 417 } 418 PetscFunctionReturn(0); 419 } 420