-/* Copyright (C) 2002-2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
Contributed by Andy Vaught
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with libgfortran; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
-#include "config.h"
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
#include "libgfortran.h"
-#include "../io/io.h"
+#include "io.h"
+#include "async.h"
+
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* <sys/time.h> has to be included before <sys/resource.h> to work
+ around PR 30518; otherwise, MacOS 10.3.9 headers are just broken. */
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
+
+#include <locale.h>
+
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
+
+
+#ifdef __MINGW32__
+#define HAVE_GETPID 1
+#include <process.h>
+#endif
+
+
+/* Termination of a program: F2008 2.3.5 talks about "normal
+ termination" and "error termination". Normal termination occurs as
+ a result of e.g. executing the end program statement, and executing
+ the STOP statement. It includes the effect of the C exit()
+ function.
+
+ Error termination is initiated when the ERROR STOP statement is
+ executed, when ALLOCATE/DEALLOCATE fails without STAT= being
+ specified, when some of the co-array synchronization statements
+ fail without STAT= being specified, and some I/O errors if
+ ERR/IOSTAT/END/EOR is not present, and finally EXECUTE_COMMAND_LINE
+ failure without CMDSTAT=.
+
+ 2.3.5 also explains how co-images synchronize during termination.
+
+ In libgfortran we have three ways of ending a program. exit(code)
+ is a normal exit; calling exit() also causes open units to be
+ closed. No backtrace or core dump is needed here. For error
+ termination, we have exit_error(status), which prints a backtrace
+ if backtracing is enabled, then exits. Finally, when something
+ goes terribly wrong, we have sys_abort() which tries to print the
+ backtrace if -fbacktrace is enabled, and then dumps core; whether a
+ core file is generated is system dependent. When aborting, we don't
+ flush and close open units, as program memory might be corrupted
+ and we'd rather risk losing dirty data in the buffers rather than
+ corrupting files on disk.
+
+*/
/* Error conditions. The tricky part here is printing a message when
* it is the I/O subsystem that is severely wounded. Our goal is to
* 1 Terminated because of operating system error.
* 2 Error in the runtime library
* 3 Internal error in runtime library
- * 4 Error during error processing (very bad)
*
* Other error returns are reserved for the STOP statement with a numeric code.
*/
-/* locus variables. These are optionally set by a caller before a
- * library subroutine is called. They are always cleared on exit so
- * that files that report loci and those that do not can be linked
- * together without reporting an erroneous position. */
-char *filename = 0;
-iexport_data(filename);
+/* Write a null-terminated C string to standard error. This function
+ is async-signal-safe. */
-unsigned line = 0;
-iexport_data(line);
+ssize_t
+estr_write (const char *str)
+{
+ return write (STDERR_FILENO, str, strlen (str));
+}
-static char buffer[32]; /* buffer for integer/ascii conversions */
+/* Write a vector of strings to standard error. This function is
+ async-signal-safe. */
-/* Returns a pointer to a static buffer. */
+ssize_t
+estr_writev (const struct iovec *iov, int iovcnt)
+{
+#ifdef HAVE_WRITEV
+ return writev (STDERR_FILENO, iov, iovcnt);
+#else
+ ssize_t w = 0;
+ for (int i = 0; i < iovcnt; i++)
+ {
+ ssize_t r = write (STDERR_FILENO, iov[i].iov_base, iov[i].iov_len);
+ if (r == -1)
+ return r;
+ w += r;
+ }
+ return w;
+#endif
+}
-char *
-gfc_itoa (int64_t n)
+
+#ifndef HAVE_VSNPRINTF
+static int
+gf_vsnprintf (char *str, size_t size, const char *format, va_list ap)
{
- int negative;
- char *p;
- uint64_t t;
+ int written;
- if (n == 0)
+ written = vsprintf(buffer, format, ap);
+
+ if (written >= size - 1)
{
- buffer[0] = '0';
- buffer[1] = '\0';
- return buffer;
+ /* The error message was longer than our buffer. Ouch. Because
+ we may have messed up things badly, report the error and
+ quit. */
+#define ERROR_MESSAGE "Internal error: buffer overrun in gf_vsnprintf()\n"
+ write (STDERR_FILENO, buffer, size - 1);
+ write (STDERR_FILENO, ERROR_MESSAGE, strlen (ERROR_MESSAGE));
+ sys_abort ();
+#undef ERROR_MESSAGE
+
}
+ return written;
+}
+
+#define vsnprintf gf_vsnprintf
+#endif
+
+
+/* printf() like function for for printing to stderr. Uses a stack
+ allocated buffer and doesn't lock stderr, so it should be safe to
+ use from within a signal handler. */
+
+#define ST_ERRBUF_SIZE 512
+
+int
+st_printf (const char * format, ...)
+{
+ char buffer[ST_ERRBUF_SIZE];
+ int written;
+ va_list ap;
+ va_start (ap, format);
+ written = vsnprintf (buffer, ST_ERRBUF_SIZE, format, ap);
+ va_end (ap);
+ written = write (STDERR_FILENO, buffer, written);
+ return written;
+}
- negative = 0;
- t = n;
- if (n < 0)
+
+/* sys_abort()-- Terminate the program showing backtrace and dumping
+ core. */
+
+void
+sys_abort (void)
+{
+ /* If backtracing is enabled, print backtrace and disable signal
+ handler for ABRT. */
+ if (options.backtrace == 1
+ || (options.backtrace == -1 && compile_options.backtrace == 1))
{
- negative = 1;
- t = -n; /*must use unsigned to protect from overflow*/
+ estr_write ("\nProgram aborted. Backtrace:\n");
+ show_backtrace (false);
+ signal (SIGABRT, SIG_DFL);
}
- p = buffer + sizeof (buffer) - 1;
- *p-- = '\0';
+ abort();
+}
+
- while (t != 0)
+/* Exit in case of error termination. If backtracing is enabled, print
+ backtrace, then exit. */
+
+void
+exit_error (int status)
+{
+ if (options.backtrace == 1
+ || (options.backtrace == -1 && compile_options.backtrace == 1))
{
- *p-- = '0' + (t % 10);
- t /= 10;
+ estr_write ("\nError termination. Backtrace:\n");
+ show_backtrace (false);
}
-
- if (negative)
- *p-- = '-';
- return ++p;
+ exit (status);
}
-/* xtoa()-- Integer to hexadecimal conversion. Returns a pointer to a
- * static buffer. */
-char *
-xtoa (uint64_t n)
+/* gfc_xtoa()-- Integer to hexadecimal conversion. */
+
+const char *
+gfc_xtoa (GFC_UINTEGER_LARGEST n, char *buffer, size_t len)
{
int digit;
char *p;
+ assert (len >= GFC_XTOA_BUF_SIZE);
+
if (n == 0)
- {
- buffer[0] = '0';
- buffer[1] = '\0';
- return buffer;
- }
+ return "0";
- p = buffer + sizeof (buffer) - 1;
- *p-- = '\0';
+ p = buffer + GFC_XTOA_BUF_SIZE - 1;
+ *p = '\0';
while (n != 0)
{
if (digit > 9)
digit += 'A' - '0' - 10;
- *p-- = '0' + digit;
+ *--p = '0' + digit;
n >>= 4;
}
- return ++p;
+ return p;
}
-/* st_printf()-- simple printf() function for streams that handles the
- * formats %d, %s and %c. This function handles printing of error
- * messages that originate within the library itself, not from a user
- * program. */
+/* Hopefully thread-safe wrapper for a strerror() style function. */
-int
-st_printf (const char *format, ...)
+char *
+gf_strerror (int errnum,
+ char * buf __attribute__((unused)),
+ size_t buflen __attribute__((unused)))
{
- int count, total;
- va_list arg;
- char *p, *q;
- stream *s;
-
- total = 0;
- s = init_error_stream ();
- va_start (arg, format);
-
- for (;;)
+#ifdef HAVE_STRERROR_L
+ locale_t myloc = newlocale (LC_CTYPE_MASK | LC_MESSAGES_MASK, "",
+ (locale_t) 0);
+ char *p;
+ if (myloc)
{
- count = 0;
-
- while (format[count] != '%' && format[count] != '\0')
- count++;
-
- if (count != 0)
- {
- p = salloc_w (s, &count);
- memmove (p, format, count);
- sfree (s);
- }
-
- total += count;
- format += count;
- if (*format++ == '\0')
- break;
-
- switch (*format)
- {
- case 'c':
- count = 1;
-
- p = salloc_w (s, &count);
- *p = (char) va_arg (arg, int);
-
- sfree (s);
- break;
-
- case 'd':
- q = gfc_itoa (va_arg (arg, int));
- count = strlen (q);
-
- p = salloc_w (s, &count);
- memmove (p, q, count);
- sfree (s);
- break;
-
- case 'x':
- q = xtoa (va_arg (arg, unsigned));
- count = strlen (q);
-
- p = salloc_w (s, &count);
- memmove (p, q, count);
- sfree (s);
- break;
-
- case 's':
- q = va_arg (arg, char *);
- count = strlen (q);
-
- p = salloc_w (s, &count);
- memmove (p, q, count);
- sfree (s);
- break;
-
- case '\0':
- return total;
-
- default:
- count = 2;
- p = salloc_w (s, &count);
- p[0] = format[-1];
- p[1] = format[0];
- sfree (s);
- break;
- }
-
- total += count;
- format++;
+ p = strerror_l (errnum, myloc);
+ freelocale (myloc);
}
-
- va_end (arg);
- return total;
+ else
+ /* newlocale might fail e.g. due to running out of memory, fall
+ back to the simpler strerror. */
+ p = strerror (errnum);
+ return p;
+#elif defined(HAVE_STRERROR_R)
+#ifdef HAVE_USELOCALE
+ /* Some targets (Darwin at least) have the POSIX 2008 extended
+ locale functions, but not strerror_l. So reset the per-thread
+ locale here. */
+ uselocale (LC_GLOBAL_LOCALE);
+#endif
+ /* POSIX returns an "int", GNU a "char*". */
+ return
+ __builtin_choose_expr (__builtin_classify_type (strerror_r (0, buf, 0))
+ == 5,
+ /* GNU strerror_r() */
+ strerror_r (errnum, buf, buflen),
+ /* POSIX strerror_r () */
+ (strerror_r (errnum, buf, buflen), buf));
+#elif defined(HAVE_STRERROR_R_2ARGS)
+ strerror_r (errnum, buf);
+ return buf;
+#else
+ /* strerror () is not necessarily thread-safe, but should at least
+ be available everywhere. */
+ return strerror (errnum);
+#endif
}
-/* st_sprintf()-- Simple sprintf() for formatting memory buffers. */
+/* show_locus()-- Print a line number and filename describing where
+ * something went wrong */
void
-st_sprintf (char *buffer, const char *format, ...)
+show_locus (st_parameter_common *cmp)
{
- va_list arg;
- char c, *p;
- int count;
-
- va_start (arg, format);
+ char *filename;
- for (;;)
+ if (!options.locus || cmp == NULL || cmp->filename == NULL)
+ return;
+
+ if (cmp->unit > 0)
{
- c = *format++;
- if (c != '%')
+ filename = filename_from_unit (cmp->unit);
+
+ if (filename != NULL)
{
- *buffer++ = c;
- if (c == '\0')
- break;
- continue;
+ st_printf ("At line %d of file %s (unit = %d, file = '%s')\n",
+ (int) cmp->line, cmp->filename, (int) cmp->unit, filename);
+ free (filename);
}
-
- c = *format++;
- switch (c)
+ else
{
- case 'c':
- *buffer++ = (char) va_arg (arg, int);
- break;
-
- case 'd':
- p = gfc_itoa (va_arg (arg, int));
- count = strlen (p);
-
- memcpy (buffer, p, count);
- buffer += count;
- break;
-
- case 's':
- p = va_arg (arg, char *);
- count = strlen (p);
-
- memcpy (buffer, p, count);
- buffer += count;
- break;
-
- default:
- *buffer++ = c;
+ st_printf ("At line %d of file %s (unit = %d)\n",
+ (int) cmp->line, cmp->filename, (int) cmp->unit);
}
+ return;
}
- va_end (arg);
-}
-
-
-/* show_locus()-- Print a line number and filename describing where
- * something went wrong */
-
-void
-show_locus (void)
-{
- if (!options.locus || filename == NULL)
- return;
-
- st_printf ("At line %d of file %s\n", line, filename);
+ st_printf ("At line %d of file %s\n", (int) cmp->line, cmp->filename);
}
/* recursion_check()-- It's possible for additional errors to occur
* during fatal error processing. We detect this condition here and
- * exit with code 4 immediately. */
+ * abort immediately. */
-#define MAGIC 0x20DE8101
+static __gthread_key_t recursion_key;
static void
recursion_check (void)
{
- static int magic = 0;
+ if (__gthread_active_p ())
+ {
+ bool* p = __gthread_getspecific (recursion_key);
+ if (!p)
+ {
+ p = xcalloc (1, sizeof (bool));
+ __gthread_setspecific (recursion_key, p);
+ }
+ if (*p)
+ sys_abort ();
+ *p = true;
+ }
+ else
+ {
+ static bool recur;
+ if (recur)
+ sys_abort ();
+ recur = true;
+ }
+}
- /* Don't even try to print something at this point */
- if (magic == MAGIC)
- sys_exit (4);
+#ifdef __GTHREADS
+static void __attribute__((constructor))
+constructor_recursion_check (void)
+{
+ if (__gthread_active_p ())
+ __gthread_key_create (&recursion_key, &free);
+}
- magic = MAGIC;
+static void __attribute__((destructor))
+destructor_recursion_check (void)
+{
+ if (__gthread_active_p ())
+ __gthread_key_delete (recursion_key);
}
+#endif
+
+#define STRERR_MAXSZ 256
+
/* os_error()-- Operating system error. We get a message from the
* operating system, show it and leave. Some operating system errors
* are caught and processed by the library. If not, we come here. */
void
os_error (const char *message)
{
+ char errmsg[STRERR_MAXSZ];
+ struct iovec iov[5];
recursion_check ();
- show_locus ();
- st_printf ("Operating system error: %s\n%s\n", get_oserror (), message);
- sys_exit (1);
+ iov[0].iov_base = (char*) "Operating system error: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = gf_strerror (errno, errmsg, STRERR_MAXSZ);
+ iov[1].iov_len = strlen (iov[1].iov_base);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ iov[3].iov_base = (char*) message;
+ iov[3].iov_len = strlen (message);
+ iov[4].iov_base = (char*) "\n";
+ iov[4].iov_len = 1;
+ estr_writev (iov, 5);
+ exit_error (1);
+}
+iexport(os_error); /* TODO, DEPRECATED, ABI: Should not be exported
+ anymore when bumping so version. */
+
+
+/* Improved version of os_error with a printf style format string and
+ a locus. */
+
+void
+os_error_at (const char *where, const char *message, ...)
+{
+ char errmsg[STRERR_MAXSZ];
+ char buffer[STRERR_MAXSZ];
+ struct iovec iov[6];
+ va_list ap;
+ recursion_check ();
+ int written;
+
+ iov[0].iov_base = (char*) where;
+ iov[0].iov_len = strlen (where);
+
+ iov[1].iov_base = (char*) ": ";
+ iov[1].iov_len = strlen (iov[1].iov_base);
+
+ va_start (ap, message);
+ written = vsnprintf (buffer, STRERR_MAXSZ, message, ap);
+ va_end (ap);
+ iov[2].iov_base = buffer;
+ if (written >= 0)
+ iov[2].iov_len = written;
+ else
+ iov[2].iov_len = 0;
+
+ iov[3].iov_base = (char*) ": ";
+ iov[3].iov_len = strlen (iov[3].iov_base);
+
+ iov[4].iov_base = gf_strerror (errno, errmsg, STRERR_MAXSZ);
+ iov[4].iov_len = strlen (iov[4].iov_base);
+
+ iov[5].iov_base = (char*) "\n";
+ iov[5].iov_len = 1;
+
+ estr_writev (iov, 6);
+ exit_error (1);
}
+iexport(os_error_at);
/* void runtime_error()-- These are errors associated with an
* invalid fortran program. */
void
-runtime_error (const char *message)
+runtime_error (const char *message, ...)
{
+ char buffer[ST_ERRBUF_SIZE];
+ struct iovec iov[3];
+ va_list ap;
+ int written;
+
recursion_check ();
- show_locus ();
- st_printf ("Fortran runtime error: %s\n", message);
- sys_exit (2);
+ iov[0].iov_base = (char*) "Fortran runtime error: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ va_start (ap, message);
+ written = vsnprintf (buffer, ST_ERRBUF_SIZE, message, ap);
+ va_end (ap);
+ if (written >= 0)
+ {
+ iov[1].iov_base = buffer;
+ iov[1].iov_len = written;
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+ }
+ exit_error (2);
}
iexport(runtime_error);
+/* void runtime_error_at()-- These are errors associated with a
+ * run time error generated by the front end compiler. */
+
+void
+runtime_error_at (const char *where, const char *message, ...)
+{
+ char buffer[ST_ERRBUF_SIZE];
+ va_list ap;
+ struct iovec iov[4];
+ int written;
+
+ recursion_check ();
+ iov[0].iov_base = (char*) where;
+ iov[0].iov_len = strlen (where);
+ iov[1].iov_base = (char*) "\nFortran runtime error: ";
+ iov[1].iov_len = strlen (iov[1].iov_base);
+ va_start (ap, message);
+ written = vsnprintf (buffer, ST_ERRBUF_SIZE, message, ap);
+ va_end (ap);
+ if (written >= 0)
+ {
+ iov[2].iov_base = buffer;
+ iov[2].iov_len = written;
+ iov[3].iov_base = (char*) "\n";
+ iov[3].iov_len = 1;
+ estr_writev (iov, 4);
+ }
+ exit_error (2);
+}
+iexport(runtime_error_at);
+
+
+void
+runtime_warning_at (const char *where, const char *message, ...)
+{
+ char buffer[ST_ERRBUF_SIZE];
+ va_list ap;
+ struct iovec iov[4];
+ int written;
+
+ iov[0].iov_base = (char*) where;
+ iov[0].iov_len = strlen (where);
+ iov[1].iov_base = (char*) "\nFortran runtime warning: ";
+ iov[1].iov_len = strlen (iov[1].iov_base);
+ va_start (ap, message);
+ written = vsnprintf (buffer, ST_ERRBUF_SIZE, message, ap);
+ va_end (ap);
+ if (written >= 0)
+ {
+ iov[2].iov_base = buffer;
+ iov[2].iov_len = written;
+ iov[3].iov_base = (char*) "\n";
+ iov[3].iov_len = 1;
+ estr_writev (iov, 4);
+ }
+}
+iexport(runtime_warning_at);
+
/* void internal_error()-- These are this-can't-happen errors
* that indicate something deeply wrong. */
void
-internal_error (const char *message)
+internal_error (st_parameter_common *cmp, const char *message)
{
+ struct iovec iov[3];
+
recursion_check ();
- show_locus ();
- st_printf ("Internal Error: %s\n", message);
- sys_exit (3);
+ show_locus (cmp);
+ iov[0].iov_base = (char*) "Internal Error: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = (char*) message;
+ iov[1].iov_len = strlen (message);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+
+ /* This function call is here to get the main.o object file included
+ when linking statically. This works because error.o is supposed to
+ be always linked in (and the function call is in internal_error
+ because hopefully it doesn't happen too often). */
+ stupid_function_name_for_static_linking();
+
+ exit_error (3);
}
switch (code)
{
- case ERROR_EOR:
+ case LIBERROR_EOR:
p = "End of record";
break;
- case ERROR_END:
+ case LIBERROR_END:
p = "End of file";
break;
- case ERROR_OK:
+ case LIBERROR_OK:
p = "Successful return";
break;
- case ERROR_OS:
+ case LIBERROR_OS:
p = "Operating system error";
break;
- case ERROR_BAD_OPTION:
+ case LIBERROR_BAD_OPTION:
p = "Bad statement option";
break;
- case ERROR_MISSING_OPTION:
+ case LIBERROR_MISSING_OPTION:
p = "Missing statement option";
break;
- case ERROR_OPTION_CONFLICT:
+ case LIBERROR_OPTION_CONFLICT:
p = "Conflicting statement options";
break;
- case ERROR_ALREADY_OPEN:
+ case LIBERROR_ALREADY_OPEN:
p = "File already opened in another unit";
break;
- case ERROR_BAD_UNIT:
+ case LIBERROR_BAD_UNIT:
p = "Unattached unit";
break;
- case ERROR_FORMAT:
+ case LIBERROR_FORMAT:
p = "FORMAT error";
break;
- case ERROR_BAD_ACTION:
+ case LIBERROR_BAD_ACTION:
p = "Incorrect ACTION specified";
break;
- case ERROR_ENDFILE:
+ case LIBERROR_ENDFILE:
p = "Read past ENDFILE record";
break;
- case ERROR_BAD_US:
+ case LIBERROR_BAD_US:
p = "Corrupt unformatted sequential file";
break;
- case ERROR_READ_VALUE:
+ case LIBERROR_READ_VALUE:
p = "Bad value during read";
break;
- case ERROR_READ_OVERFLOW:
+ case LIBERROR_READ_OVERFLOW:
p = "Numeric overflow on read";
break;
+ case LIBERROR_INTERNAL:
+ p = "Internal error in run-time library";
+ break;
+
+ case LIBERROR_INTERNAL_UNIT:
+ p = "Internal unit I/O error";
+ break;
+
+ case LIBERROR_DIRECT_EOR:
+ p = "Write exceeds length of DIRECT access record";
+ break;
+
+ case LIBERROR_SHORT_RECORD:
+ p = "I/O past end of record on unformatted file";
+ break;
+
+ case LIBERROR_CORRUPT_FILE:
+ p = "Unformatted file structure has been corrupted";
+ break;
+
+ case LIBERROR_INQUIRE_INTERNAL_UNIT:
+ p = "Inquire statement identifies an internal file";
+ break;
+
default:
p = "Unknown error code";
break;
}
-/* generate_error()-- Come here when an error happens. This
- * subroutine is called if it is possible to continue on after the
- * error. If an IOSTAT variable exists, we set it. If the IOSTAT or
- * ERR label is present, we return, otherwise we terminate the program
- * after print a message. The error code is always required but the
- * message parameter can be NULL, in which case a string describing
- * the most recent operating system error is used. */
+/* Worker function for generate_error and generate_error_async. Return true
+ if a straight return is to be done, zero if the program should abort. */
-void
-generate_error (int family, const char *message)
+bool
+generate_error_common (st_parameter_common *cmp, int family, const char *message)
{
+ char errmsg[STRERR_MAXSZ];
+
+#if ASYNC_IO
+ gfc_unit *u;
+
+ NOTE ("Entering generate_error_common");
+
+ u = thread_unit;
+ if (u && u->au)
+ {
+ if (u->au->error.has_error)
+ return true;
+
+ if (__gthread_equal (u->au->thread, __gthread_self ()))
+ {
+ u->au->error.has_error = 1;
+ u->au->error.cmp = cmp;
+ u->au->error.family = family;
+ u->au->error.message = message;
+ return true;
+ }
+ }
+#endif
+
+ /* If there was a previous error, don't mask it with another
+ error message, EOF or EOR condition. */
+
+ if ((cmp->flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_ERROR)
+ return true;
+
/* Set the error status. */
- if (ioparm.iostat != NULL)
- *ioparm.iostat = family;
+ if ((cmp->flags & IOPARM_HAS_IOSTAT))
+ *cmp->iostat = (family == LIBERROR_OS) ? errno : family;
+
+ if (message == NULL)
+ message =
+ (family == LIBERROR_OS) ? gf_strerror (errno, errmsg, STRERR_MAXSZ) :
+ translate_error (family);
+
+ if (cmp->flags & IOPARM_HAS_IOMSG)
+ cf_strcpy (cmp->iomsg, cmp->iomsg_len, message);
/* Report status back to the compiler. */
+ cmp->flags &= ~IOPARM_LIBRETURN_MASK;
switch (family)
{
- case ERROR_EOR:
- ioparm.library_return = LIBRARY_EOR;
- if (ioparm.eor != 0)
- return;
+ case LIBERROR_EOR:
+ cmp->flags |= IOPARM_LIBRETURN_EOR; NOTE("EOR");
+ if ((cmp->flags & IOPARM_EOR))
+ return true;
break;
- case ERROR_END:
- ioparm.library_return = LIBRARY_END;
- if (ioparm.end != 0)
- return;
+ case LIBERROR_END:
+ cmp->flags |= IOPARM_LIBRETURN_END; NOTE("END");
+ if ((cmp->flags & IOPARM_END))
+ return true;
break;
default:
- ioparm.library_return = LIBRARY_ERROR;
- if (ioparm.err != 0)
- return;
+ cmp->flags |= IOPARM_LIBRETURN_ERROR; NOTE("ERROR");
+ if ((cmp->flags & IOPARM_ERR))
+ return true;
break;
}
/* Return if the user supplied an iostat variable. */
- if (ioparm.iostat != NULL)
+ if ((cmp->flags & IOPARM_HAS_IOSTAT))
+ return true;
+
+ /* Return code, caller is responsible for terminating
+ the program if necessary. */
+
+ recursion_check ();
+ show_locus (cmp);
+ struct iovec iov[3];
+ iov[0].iov_base = (char*) "Fortran runtime error: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = (char*) message;
+ iov[1].iov_len = strlen (message);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+ return false;
+}
+
+/* generate_error()-- Come here when an error happens. This
+ * subroutine is called if it is possible to continue on after the error.
+ * If an IOSTAT or IOMSG variable exists, we set it. If IOSTAT or
+ * ERR labels are present, we return, otherwise we terminate the program
+ * after printing a message. The error code is always required but the
+ * message parameter can be NULL, in which case a string describing
+ * the most recent operating system error is used.
+ * If the error is for an asynchronous unit and if the program is currently
+ * executing the asynchronous thread, just mark the error and return. */
+
+void
+generate_error (st_parameter_common *cmp, int family, const char *message)
+{
+ if (generate_error_common (cmp, family, message))
return;
- /* Terminate the program */
+ exit_error(2);
+}
+iexport(generate_error);
+
+/* generate_warning()-- Similar to generate_error but just give a warning. */
+
+void
+generate_warning (st_parameter_common *cmp, const char *message)
+{
if (message == NULL)
- message =
- (family == ERROR_OS) ? get_oserror () : translate_error (family);
+ message = " ";
+
+ show_locus (cmp);
+ struct iovec iov[3];
+ iov[0].iov_base = (char*) "Fortran runtime warning: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = (char*) message;
+ iov[1].iov_len = strlen (message);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+}
+
+
+/* Whether, for a feature included in a given standard set (GFC_STD_*),
+ we should issue an error or a warning, or be quiet. */
+
+notification
+notification_std (int std)
+{
+ int warning;
+
+ if (!compile_options.pedantic)
+ return NOTIFICATION_SILENT;
+
+ warning = compile_options.warn_std & std;
+ if ((compile_options.allow_std & std) != 0 && !warning)
+ return NOTIFICATION_SILENT;
- runtime_error (message);
+ return warning ? NOTIFICATION_WARNING : NOTIFICATION_ERROR;
+}
+
+
+/* Possibly issue a warning/error about use of a nonstandard (or deleted)
+ feature. An error/warning will be issued if the currently selected
+ standard does not contain the requested bits. */
+
+bool
+notify_std (st_parameter_common *cmp, int std, const char * message)
+{
+ int warning;
+ struct iovec iov[3];
+
+ if (!compile_options.pedantic)
+ return true;
+
+ warning = compile_options.warn_std & std;
+ if ((compile_options.allow_std & std) != 0 && !warning)
+ return true;
+
+ if (!warning)
+ {
+ recursion_check ();
+ show_locus (cmp);
+ iov[0].iov_base = (char*) "Fortran runtime error: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = (char*) message;
+ iov[1].iov_len = strlen (message);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+ exit_error (2);
+ }
+ else
+ {
+ show_locus (cmp);
+ iov[0].iov_base = (char*) "Fortran runtime warning: ";
+ iov[0].iov_len = strlen (iov[0].iov_base);
+ iov[1].iov_base = (char*) message;
+ iov[1].iov_len = strlen (message);
+ iov[2].iov_base = (char*) "\n";
+ iov[2].iov_len = 1;
+ estr_writev (iov, 3);
+ }
+ return false;
}
projects / thirdparty / gcc.git / blobdiff