1 /* Copyright (C) 2002, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
2 Contributed by Andy Vaught
4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
6 Libgfortran is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 In addition to the permissions in the GNU General Public License, the
12 Free Software Foundation gives you unlimited permission to link the
13 compiled version of this file into combinations with other programs,
14 and to distribute those combinations without any restriction coming
15 from the use of this file. (The General Public License restrictions
16 do apply in other respects; for example, they cover modification of
17 the file, and distribution when not linked into a combine
20 Libgfortran is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with libgfortran; see the file COPYING. If not, write to
27 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
28 Boston, MA 02110-1301, USA. */
31 #include "libgfortran.h"
48 #ifdef HAVE_SYS_TIME_H
52 /* <sys/time.h> has to be included before <sys/resource.h> to work
53 around PR 30518; otherwise, MacOS 10.3.9 headers are just broken. */
54 #ifdef HAVE_SYS_RESOURCE_H
55 #include <sys/resource.h>
65 /* sys_exit()-- Terminate the program with an exit code. */
70 /* Show error backtrace if possible. */
71 if (code != 0 && code != 4
72 && (options.backtrace == 1
73 || (options.backtrace == -1 && compile_options.backtrace == 1)))
76 /* Dump core if requested. */
78 && (options.dump_core == 1
79 || (options.dump_core == -1 && compile_options.dump_core == 1)))
81 #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_CORE)
82 /* Warn if a core file cannot be produced because
83 of core size limit. */
85 struct rlimit core_limit;
87 if (getrlimit (RLIMIT_CORE, &core_limit) == 0 && core_limit.rlim_cur == 0)
88 st_printf ("** Warning: a core dump was requested, but the core size"
89 "limit\n** is currently zero.\n\n");
93 #if defined(HAVE_KILL) && defined(HAVE_GETPID) && defined(SIGQUIT)
94 kill (getpid (), SIGQUIT);
96 st_printf ("Core dump not possible, sorry.");
104 /* Error conditions. The tricky part here is printing a message when
105 * it is the I/O subsystem that is severely wounded. Our goal is to
106 * try and print something making the fewest assumptions possible,
107 * then try to clean up before actually exiting.
109 * The following exit conditions are defined:
110 * 0 Normal program exit.
111 * 1 Terminated because of operating system error.
112 * 2 Error in the runtime library
113 * 3 Internal error in runtime library
114 * 4 Error during error processing (very bad)
116 * Other error returns are reserved for the STOP statement with a numeric code.
119 /* gfc_itoa()-- Integer to decimal conversion. */
122 gfc_itoa (GFC_INTEGER_LARGEST n, char *buffer, size_t len)
126 GFC_UINTEGER_LARGEST t;
128 assert (len >= GFC_ITOA_BUF_SIZE);
138 t = -n; /*must use unsigned to protect from overflow*/
141 p = buffer + GFC_ITOA_BUF_SIZE - 1;
146 *--p = '0' + (t % 10);
156 /* xtoa()-- Integer to hexadecimal conversion. */
159 xtoa (GFC_UINTEGER_LARGEST n, char *buffer, size_t len)
164 assert (len >= GFC_XTOA_BUF_SIZE);
169 p = buffer + GFC_XTOA_BUF_SIZE - 1;
176 digit += 'A' - '0' - 10;
185 /* show_locus()-- Print a line number and filename describing where
186 * something went wrong */
189 show_locus (st_parameter_common *cmp)
191 static char *filename;
193 if (!options.locus || cmp == NULL || cmp->filename == NULL)
198 filename = filename_from_unit (cmp->unit);
199 if (filename != NULL)
201 st_printf ("At line %d of file %s (unit = %d, file = '%s')\n",
202 (int) cmp->line, cmp->filename, cmp->unit, filename);
207 st_printf ("At line %d of file %s (unit = %d)\n",
208 (int) cmp->line, cmp->filename, cmp->unit);
213 st_printf ("At line %d of file %s\n", (int) cmp->line, cmp->filename);
217 /* recursion_check()-- It's possible for additional errors to occur
218 * during fatal error processing. We detect this condition here and
219 * exit with code 4 immediately. */
221 #define MAGIC 0x20DE8101
224 recursion_check (void)
226 static int magic = 0;
228 /* Don't even try to print something at this point */
236 /* os_error()-- Operating system error. We get a message from the
237 * operating system, show it and leave. Some operating system errors
238 * are caught and processed by the library. If not, we come here. */
241 os_error (const char *message)
244 st_printf ("Operating system error: %s\n%s\n", get_oserror (), message);
250 /* void runtime_error()-- These are errors associated with an
251 * invalid fortran program. */
254 runtime_error (const char *message, ...)
259 st_printf ("Fortran runtime error: ");
260 va_start (ap, message);
261 st_vprintf (message, ap);
266 iexport(runtime_error);
268 /* void runtime_error_at()-- These are errors associated with a
269 * run time error generated by the front end compiler. */
272 runtime_error_at (const char *where, const char *message, ...)
277 st_printf ("%s\n", where);
278 st_printf ("Fortran runtime error: ");
279 va_start (ap, message);
280 st_vprintf (message, ap);
285 iexport(runtime_error_at);
289 runtime_warning_at (const char *where, const char *message, ...)
293 st_printf ("%s\n", where);
294 st_printf ("Fortran runtime warning: ");
295 va_start (ap, message);
296 st_vprintf (message, ap);
300 iexport(runtime_warning_at);
303 /* void internal_error()-- These are this-can't-happen errors
304 * that indicate something deeply wrong. */
307 internal_error (st_parameter_common *cmp, const char *message)
311 st_printf ("Internal Error: %s\n", message);
313 /* This function call is here to get the main.o object file included
314 when linking statically. This works because error.o is supposed to
315 be always linked in (and the function call is in internal_error
316 because hopefully it doesn't happen too often). */
317 stupid_function_name_for_static_linking();
323 /* translate_error()-- Given an integer error code, return a string
324 * describing the error. */
327 translate_error (int code)
342 p = "Successful return";
346 p = "Operating system error";
349 case LIBERROR_BAD_OPTION:
350 p = "Bad statement option";
353 case LIBERROR_MISSING_OPTION:
354 p = "Missing statement option";
357 case LIBERROR_OPTION_CONFLICT:
358 p = "Conflicting statement options";
361 case LIBERROR_ALREADY_OPEN:
362 p = "File already opened in another unit";
365 case LIBERROR_BAD_UNIT:
366 p = "Unattached unit";
369 case LIBERROR_FORMAT:
373 case LIBERROR_BAD_ACTION:
374 p = "Incorrect ACTION specified";
377 case LIBERROR_ENDFILE:
378 p = "Read past ENDFILE record";
381 case LIBERROR_BAD_US:
382 p = "Corrupt unformatted sequential file";
385 case LIBERROR_READ_VALUE:
386 p = "Bad value during read";
389 case LIBERROR_READ_OVERFLOW:
390 p = "Numeric overflow on read";
393 case LIBERROR_INTERNAL:
394 p = "Internal error in run-time library";
397 case LIBERROR_INTERNAL_UNIT:
398 p = "Internal unit I/O error";
401 case LIBERROR_DIRECT_EOR:
402 p = "Write exceeds length of DIRECT access record";
405 case LIBERROR_SHORT_RECORD:
406 p = "I/O past end of record on unformatted file";
409 case LIBERROR_CORRUPT_FILE:
410 p = "Unformatted file structure has been corrupted";
414 p = "Unknown error code";
422 /* generate_error()-- Come here when an error happens. This
423 * subroutine is called if it is possible to continue on after the error.
424 * If an IOSTAT or IOMSG variable exists, we set it. If IOSTAT or
425 * ERR labels are present, we return, otherwise we terminate the program
426 * after printing a message. The error code is always required but the
427 * message parameter can be NULL, in which case a string describing
428 * the most recent operating system error is used. */
431 generate_error (st_parameter_common *cmp, int family, const char *message)
434 /* If there was a previous error, don't mask it with another
435 error message, EOF or EOR condition. */
437 if ((cmp->flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_ERROR)
440 /* Set the error status. */
441 if ((cmp->flags & IOPARM_HAS_IOSTAT))
442 *cmp->iostat = (family == LIBERROR_OS) ? errno : family;
446 (family == LIBERROR_OS) ? get_oserror () : translate_error (family);
448 if (cmp->flags & IOPARM_HAS_IOMSG)
449 cf_strcpy (cmp->iomsg, cmp->iomsg_len, message);
451 /* Report status back to the compiler. */
452 cmp->flags &= ~IOPARM_LIBRETURN_MASK;
456 cmp->flags |= IOPARM_LIBRETURN_EOR;
457 if ((cmp->flags & IOPARM_EOR))
462 cmp->flags |= IOPARM_LIBRETURN_END;
463 if ((cmp->flags & IOPARM_END))
468 cmp->flags |= IOPARM_LIBRETURN_ERROR;
469 if ((cmp->flags & IOPARM_ERR))
474 /* Return if the user supplied an iostat variable. */
475 if ((cmp->flags & IOPARM_HAS_IOSTAT))
478 /* Terminate the program */
482 st_printf ("Fortran runtime error: %s\n", message);
485 iexport(generate_error);
487 /* Whether, for a feature included in a given standard set (GFC_STD_*),
488 we should issue an error or a warning, or be quiet. */
491 notification_std (int std)
495 if (!compile_options.pedantic)
498 warning = compile_options.warn_std & std;
499 if ((compile_options.allow_std & std) != 0 && !warning)
502 return warning ? WARNING : ERROR;
507 /* Possibly issue a warning/error about use of a nonstandard (or deleted)
508 feature. An error/warning will be issued if the currently selected
509 standard does not contain the requested bits. */
512 notify_std (st_parameter_common *cmp, int std, const char * message)
516 if (!compile_options.pedantic)
519 warning = compile_options.warn_std & std;
520 if ((compile_options.allow_std & std) != 0 && !warning)
527 st_printf ("Fortran runtime error: %s\n", message);
533 st_printf ("Fortran runtime warning: %s\n", message);