-/* Copyright (C) 2002, 2003, 2005, 2006, 2007, 2009, 2010, 2011
- Free Software Foundation, Inc.
+/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of the GNU Fortran runtime library (libgfortran).
#include <assert.h>
#include <string.h>
#include <errno.h>
-
-#ifdef HAVE_SIGNAL_H
#include <signal.h>
-#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#endif
+#include <locale.h>
+
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
+
+
#ifdef __MINGW32__
#define HAVE_GETPID 1
#include <process.h>
#endif
-/* sys_exit()-- Terminate the program with an exit code. */
+/* 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.
-void
-sys_exit (int code)
-{
- /* Show error backtrace if possible. */
- if (code != 0 && code != 4
- && (options.backtrace == 1
- || (options.backtrace == -1 && compile_options.backtrace == 1)))
- show_backtrace ();
-
- /* Dump core if requested. */
- if (code != 0
- && (options.dump_core == 1
- || (options.dump_core == -1 && compile_options.dump_core == 1)))
- {
-#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_CORE)
- /* Warn if a core file cannot be produced because
- of core size limit. */
+ 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=.
- struct rlimit core_limit;
+ 2.3.5 also explains how co-images synchronize during termination.
- if (getrlimit (RLIMIT_CORE, &core_limit) == 0 && core_limit.rlim_cur == 0)
- estr_write ("** Warning: a core dump was requested, but the core size"
- "limit\n** is currently zero.\n\n");
-#endif
-
-
-#if defined(HAVE_KILL) && defined(HAVE_GETPID) && defined(SIGQUIT)
- kill (getpid (), SIGQUIT);
-#else
- estr_write ("Core dump not possible, sorry.");
-#endif
- }
-
- exit (code);
-}
+ 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.
*/
#define ERROR_MESSAGE "Internal error: buffer overrun in st_vprintf()\n"
write (STDERR_FILENO, buffer, ST_VPRINTF_SIZE - 1);
write (STDERR_FILENO, ERROR_MESSAGE, strlen(ERROR_MESSAGE));
- sys_exit(2);
+ sys_abort ();
#undef ERROR_MESSAGE
}
}
+/* 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))
+ {
+ estr_write ("\nProgram aborted. Backtrace:\n");
+ show_backtrace (false);
+ signal (SIGABRT, SIG_DFL);
+ }
+
+ abort();
+}
+
+
+/* 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))
+ {
+ estr_write ("\nError termination. Backtrace:\n");
+ show_backtrace (false);
+ }
+ exit (status);
+}
+
+
+
/* gfc_xtoa()-- Integer to hexadecimal conversion. */
const char *
}
-/* Hopefully thread-safe wrapper for a strerror_r() style function. */
+/* Hopefully thread-safe wrapper for a strerror() style function. */
char *
gf_strerror (int errnum,
char * buf __attribute__((unused)),
size_t buflen __attribute__((unused)))
{
-#ifdef HAVE_STRERROR_R
- /* TODO: How to prevent the compiler warning due to strerror_r of
- the untaken branch having the wrong return type? */
- if (__builtin_classify_type (strerror_r (0, buf, 0)) == 5)
+#ifdef HAVE_STRERROR_L
+ locale_t myloc = newlocale (LC_CTYPE_MASK | LC_MESSAGES_MASK, "",
+ (locale_t) 0);
+ char *p;
+ if (myloc)
{
- /* GNU strerror_r() */
- return strerror_r (errnum, buf, buflen);
+ p = strerror_l (errnum, myloc);
+ freelocale (myloc);
}
else
- {
- /* POSIX strerror_r () */
- strerror_r (errnum, buf, buflen);
- return buf;
- }
+ /* 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. */
/* Don't even try to print something at this point */
if (magic == MAGIC)
- sys_exit (4);
+ sys_abort ();
magic = MAGIC;
}
estr_write ("\n");
estr_write (message);
estr_write ("\n");
- sys_exit (1);
+ exit_error (1);
}
iexport(os_error);
st_vprintf (message, ap);
va_end (ap);
estr_write ("\n");
- sys_exit (2);
+ exit_error (2);
}
iexport(runtime_error);
st_vprintf (message, ap);
va_end (ap);
estr_write ("\n");
- sys_exit (2);
+ exit_error (2);
}
iexport(runtime_error_at);
because hopefully it doesn't happen too often). */
stupid_function_name_for_static_linking();
- sys_exit (3);
+ exit_error (3);
}
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;
estr_write ("Fortran runtime error: ");
estr_write (message);
estr_write ("\n");
- sys_exit (2);
+ exit_error (2);
}
iexport(generate_error);
feature. An error/warning will be issued if the currently selected
standard does not contain the requested bits. */
-try
+bool
notify_std (st_parameter_common *cmp, int std, const char * message)
{
int warning;
if (!compile_options.pedantic)
- return SUCCESS;
+ return true;
warning = compile_options.warn_std & std;
if ((compile_options.allow_std & std) != 0 && !warning)
- return SUCCESS;
+ return true;
if (!warning)
{
estr_write ("Fortran runtime error: ");
estr_write (message);
estr_write ("\n");
- sys_exit (2);
+ exit_error (2);
}
else
{
estr_write (message);
estr_write ("\n");
}
- return FAILURE;
+ return false;
}
projects / gcc.git / blobdiff