395 lines
8.5 KiB
C
395 lines
8.5 KiB
C
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
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Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if __nvptx__
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/* Map "exit" to "abort"; see PR85463 '[nvptx] "exit" in offloaded region
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doesn't terminate process'. */
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# undef exit
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# define exit(status) do { (void) (status); abort (); } while (0)
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#endif
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#if __nvptx__
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/* 'printf' is all we have. */
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# undef estr_vprintf
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# define estr_vprintf vprintf
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#else
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# error TODO
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#endif
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/* runtime/environ.c */
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options_t options;
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/* runtime/main.c */
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/* Stupid function to be sure the constructor is always linked in, even
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in the case of static linking. See PR libfortran/22298 for details. */
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void
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stupid_function_name_for_static_linking (void)
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{
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return;
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}
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static int argc_save;
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static char **argv_save;
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/* Set the saved values of the command line arguments. */
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void
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set_args (int argc, char **argv)
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{
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argc_save = argc;
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argv_save = argv;
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}
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iexport(set_args);
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/* Retrieve the saved values of the command line arguments. */
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void
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get_args (int *argc, char ***argv)
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{
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*argc = argc_save;
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*argv = argv_save;
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}
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/* runtime/error.c */
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/* Write a null-terminated C string to standard error. This function
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is async-signal-safe. */
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ssize_t
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estr_write (const char *str)
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{
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return write (STDERR_FILENO, str, strlen (str));
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}
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/* printf() like function for for printing to stderr. Uses a stack
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allocated buffer and doesn't lock stderr, so it should be safe to
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use from within a signal handler. */
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int
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st_printf (const char * format, ...)
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{
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int written;
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va_list ap;
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va_start (ap, format);
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written = estr_vprintf (format, ap);
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va_end (ap);
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return written;
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}
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/* sys_abort()-- Terminate the program showing backtrace and dumping
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core. */
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void
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sys_abort (void)
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{
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/* If backtracing is enabled, print backtrace and disable signal
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handler for ABRT. */
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if (options.backtrace == 1
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|| (options.backtrace == -1 && compile_options.backtrace == 1))
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{
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estr_write ("\nProgram aborted.\n");
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}
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abort();
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}
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/* Exit in case of error termination. If backtracing is enabled, print
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backtrace, then exit. */
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void
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exit_error (int status)
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{
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if (options.backtrace == 1
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|| (options.backtrace == -1 && compile_options.backtrace == 1))
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{
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estr_write ("\nError termination.\n");
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}
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exit (status);
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}
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/* show_locus()-- Print a line number and filename describing where
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* something went wrong */
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void
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show_locus (st_parameter_common *cmp)
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{
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char *filename;
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if (!options.locus || cmp == NULL || cmp->filename == NULL)
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return;
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if (cmp->unit > 0)
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{
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filename = /* TODO filename_from_unit (cmp->unit) */ NULL;
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if (filename != NULL)
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{
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st_printf ("At line %d of file %s (unit = %d, file = '%s')\n",
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(int) cmp->line, cmp->filename, (int) cmp->unit, filename);
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free (filename);
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}
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else
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{
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st_printf ("At line %d of file %s (unit = %d)\n",
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(int) cmp->line, cmp->filename, (int) cmp->unit);
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}
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return;
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}
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st_printf ("At line %d of file %s\n", (int) cmp->line, cmp->filename);
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}
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/* recursion_check()-- It's possible for additional errors to occur
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* during fatal error processing. We detect this condition here and
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* exit with code 4 immediately. */
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#define MAGIC 0x20DE8101
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static void
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recursion_check (void)
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{
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static int magic = 0;
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/* Don't even try to print something at this point */
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if (magic == MAGIC)
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sys_abort ();
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magic = MAGIC;
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}
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/* os_error()-- Operating system error. We get a message from the
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* operating system, show it and leave. Some operating system errors
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* are caught and processed by the library. If not, we come here. */
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void
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os_error (const char *message)
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{
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recursion_check ();
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estr_write ("Operating system error: ");
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estr_write (message);
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estr_write ("\n");
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exit_error (1);
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}
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iexport(os_error); /* TODO, DEPRECATED, ABI: Should not be exported
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anymore when bumping so version. */
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/* Improved version of os_error with a printf style format string and
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a locus. */
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void
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os_error_at (const char *where, const char *message, ...)
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{
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va_list ap;
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recursion_check ();
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estr_write (where);
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estr_write (": ");
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va_start (ap, message);
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estr_vprintf (message, ap);
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va_end (ap);
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estr_write ("\n");
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exit_error (1);
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}
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iexport(os_error_at);
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/* void runtime_error()-- These are errors associated with an
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* invalid fortran program. */
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void
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runtime_error (const char *message, ...)
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{
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va_list ap;
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recursion_check ();
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estr_write ("Fortran runtime error: ");
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va_start (ap, message);
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estr_vprintf (message, ap);
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va_end (ap);
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estr_write ("\n");
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exit_error (2);
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}
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iexport(runtime_error);
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/* void runtime_error_at()-- These are errors associated with a
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* run time error generated by the front end compiler. */
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void
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runtime_error_at (const char *where, const char *message, ...)
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{
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va_list ap;
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recursion_check ();
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estr_write (where);
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estr_write ("\nFortran runtime error: ");
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va_start (ap, message);
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estr_vprintf (message, ap);
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va_end (ap);
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estr_write ("\n");
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exit_error (2);
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}
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iexport(runtime_error_at);
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void
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runtime_warning_at (const char *where, const char *message, ...)
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{
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va_list ap;
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estr_write (where);
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estr_write ("\nFortran runtime warning: ");
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va_start (ap, message);
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estr_vprintf (message, ap);
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va_end (ap);
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estr_write ("\n");
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}
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iexport(runtime_warning_at);
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/* void internal_error()-- These are this-can't-happen errors
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* that indicate something deeply wrong. */
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void
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internal_error (st_parameter_common *cmp, const char *message)
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{
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recursion_check ();
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show_locus (cmp);
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estr_write ("Internal Error: ");
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estr_write (message);
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estr_write ("\n");
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/* This function call is here to get the main.o object file included
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when linking statically. This works because error.o is supposed to
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be always linked in (and the function call is in internal_error
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because hopefully it doesn't happen too often). */
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stupid_function_name_for_static_linking();
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exit_error (3);
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}
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/* runtime/stop.c */
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#undef report_exception
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#define report_exception() do {} while (0)
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/* A numeric STOP statement. */
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extern _Noreturn void stop_numeric (int, bool);
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export_proto(stop_numeric);
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void
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stop_numeric (int code, bool quiet)
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{
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if (!quiet)
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{
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report_exception ();
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st_printf ("STOP %d\n", code);
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}
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exit (code);
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}
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/* A character string or blank STOP statement. */
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void
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stop_string (const char *string, size_t len, bool quiet)
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{
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if (!quiet)
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{
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report_exception ();
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if (string)
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{
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estr_write ("STOP ");
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(void) write (STDERR_FILENO, string, len);
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estr_write ("\n");
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}
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}
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exit (0);
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}
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/* Per Fortran 2008, section 8.4: "Execution of a STOP statement initiates
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normal termination of execution. Execution of an ERROR STOP statement
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initiates error termination of execution." Thus, error_stop_string returns
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a nonzero exit status code. */
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extern _Noreturn void error_stop_string (const char *, size_t, bool);
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export_proto(error_stop_string);
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void
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error_stop_string (const char *string, size_t len, bool quiet)
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{
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if (!quiet)
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{
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report_exception ();
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estr_write ("ERROR STOP ");
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(void) write (STDERR_FILENO, string, len);
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estr_write ("\n");
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}
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exit_error (1);
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}
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/* A numeric ERROR STOP statement. */
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extern _Noreturn void error_stop_numeric (int, bool);
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export_proto(error_stop_numeric);
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void
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error_stop_numeric (int code, bool quiet)
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{
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if (!quiet)
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{
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report_exception ();
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st_printf ("ERROR STOP %d\n", code);
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}
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exit_error (code);
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}
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