/* Handling of compile-time options that influence the library.
- Copyright (C) 2005 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2007, 2009, 2010, 2011, 2012
+ Free Software Foundation, Inc.
-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, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, 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.
-#include "config.h"
+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 "libgfortran.h"
+#include <signal.h>
/* Useful compile-time options will be stored in here. */
compile_options_t compile_options;
-/* Prototypes */
-extern void set_std (GFC_INTEGER_4, GFC_INTEGER_4);
-export_proto(set_std);
+volatile sig_atomic_t fatal_error_in_progress = 0;
+
+
+/* Helper function for backtrace_handler to write information about the
+ received signal to stderr before actually giving the backtrace. */
+static void
+show_signal (int signum)
+{
+ const char * name = NULL, * desc = NULL;
+
+ switch (signum)
+ {
+#if defined(SIGQUIT)
+ case SIGQUIT:
+ name = "SIGQUIT";
+ desc = "Terminal quit signal";
+ break;
+#endif
+
+ /* The following 4 signals are defined by C89. */
+ case SIGILL:
+ name = "SIGILL";
+ desc = "Illegal instruction";
+ break;
+
+ case SIGABRT:
+ name = "SIGABRT";
+ desc = "Process abort signal";
+ break;
+
+ case SIGFPE:
+ name = "SIGFPE";
+ desc = "Floating-point exception - erroneous arithmetic operation";
+ break;
+
+ case SIGSEGV:
+ name = "SIGSEGV";
+ desc = "Segmentation fault - invalid memory reference";
+ break;
+
+#if defined(SIGBUS)
+ case SIGBUS:
+ name = "SIGBUS";
+ desc = "Access to an undefined portion of a memory object";
+ break;
+#endif
+
+#if defined(SIGSYS)
+ case SIGSYS:
+ name = "SIGSYS";
+ desc = "Bad system call";
+ break;
+#endif
+
+#if defined(SIGTRAP)
+ case SIGTRAP:
+ name = "SIGTRAP";
+ desc = "Trace/breakpoint trap";
+ break;
+#endif
+
+#if defined(SIGXCPU)
+ case SIGXCPU:
+ name = "SIGXCPU";
+ desc = "CPU time limit exceeded";
+ break;
+#endif
+#if defined(SIGXFSZ)
+ case SIGXFSZ:
+ name = "SIGXFSZ";
+ desc = "File size limit exceeded";
+ break;
+#endif
+ }
+ if (name)
+ st_printf ("\nProgram received signal %s: %s.\n", name, desc);
+ else
+ st_printf ("\nProgram received signal %d.\n", signum);
+}
+
+
+/* A signal handler to allow us to output a backtrace. */
void
-set_std (GFC_INTEGER_4 warn_std, GFC_INTEGER_4 allow_std)
+backtrace_handler (int signum)
+{
+ /* Since this handler is established for more than one kind of signal,
+ it might still get invoked recursively by delivery of some other kind
+ of signal. Use a static variable to keep track of that. */
+ if (fatal_error_in_progress)
+ raise (signum);
+ fatal_error_in_progress = 1;
+
+ show_signal (signum);
+ show_backtrace();
+
+ /* Now reraise the signal. We reactivate the signal's
+ default handling, which is to terminate the process.
+ We could just call exit or abort,
+ but reraising the signal sets the return status
+ from the process correctly. */
+ signal (signum, SIG_DFL);
+ raise (signum);
+}
+
+
+/* Helper function for set_options because we need to access the
+ global variable options which is not seen in set_options. */
+static void
+maybe_find_addr2line (void)
{
- compile_options.warn_std = warn_std;
- compile_options.allow_std = allow_std;
+ if (options.backtrace == -1)
+ find_addr2line ();
+}
+
+/* Set the usual compile-time options. */
+extern void set_options (int , int []);
+export_proto(set_options);
+
+void
+set_options (int num, int options[])
+{
+ if (num >= 1)
+ compile_options.warn_std = options[0];
+ if (num >= 2)
+ compile_options.allow_std = options[1];
+ if (num >= 3)
+ compile_options.pedantic = options[2];
+ /* options[3] is the removed -fdump-core option. It's place in the
+ options array is retained due to ABI compatibility. Remove when
+ bumping the library ABI. */
+ if (num >= 5)
+ compile_options.backtrace = options[4];
+ if (num >= 6)
+ compile_options.sign_zero = options[5];
+ if (num >= 7)
+ compile_options.bounds_check = options[6];
+ if (num >= 8)
+ compile_options.range_check = options[7];
+
+ /* If backtrace is required, we set signal handlers on the POSIX
+ 2001 signals with core action. */
+ if (compile_options.backtrace)
+ {
+#if defined(SIGQUIT)
+ signal (SIGQUIT, backtrace_handler);
+#endif
+
+ /* The following 4 signals are defined by C89. */
+ signal (SIGILL, backtrace_handler);
+ signal (SIGABRT, backtrace_handler);
+ signal (SIGFPE, backtrace_handler);
+ signal (SIGSEGV, backtrace_handler);
+
+#if defined(SIGBUS)
+ signal (SIGBUS, backtrace_handler);
+#endif
+
+#if defined(SIGSYS)
+ signal (SIGSYS, backtrace_handler);
+#endif
+
+#if defined(SIGTRAP)
+ signal (SIGTRAP, backtrace_handler);
+#endif
+
+#if defined(SIGXCPU)
+ signal (SIGXCPU, backtrace_handler);
+#endif
+
+#if defined(SIGXFSZ)
+ signal (SIGXFSZ, backtrace_handler);
+#endif
+
+ maybe_find_addr2line ();
+ }
}
void
init_compile_options (void)
{
- compile_options.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
- | GFC_STD_F2003 | GFC_STD_LEGACY;
+ compile_options.warn_std = GFC_STD_F95_DEL | GFC_STD_LEGACY;
compile_options.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
- | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU | GFC_STD_LEGACY;
+ | GFC_STD_F2003 | GFC_STD_F2008 | GFC_STD_F95 | GFC_STD_F77
+ | GFC_STD_F2008_OBS | GFC_STD_GNU | GFC_STD_LEGACY;
+ compile_options.pedantic = 0;
+ compile_options.backtrace = 0;
+ compile_options.sign_zero = 1;
+ compile_options.range_check = 1;
}
/* Function called by the front-end to tell us the
{
compile_options.convert = conv;
}
+
+extern void set_record_marker (int);
+export_proto (set_record_marker);
+
+
+void
+set_record_marker (int val)
+{
+
+ switch(val)
+ {
+ case 4:
+ compile_options.record_marker = sizeof (GFC_INTEGER_4);
+ break;
+
+ case 8:
+ compile_options.record_marker = sizeof (GFC_INTEGER_8);
+ break;
+
+ default:
+ runtime_error ("Invalid value for record marker");
+ break;
+ }
+}
+
+extern void set_max_subrecord_length (int);
+export_proto (set_max_subrecord_length);
+
+void set_max_subrecord_length(int val)
+{
+ if (val > GFC_MAX_SUBRECORD_LENGTH || val < 1)
+ {
+ runtime_error ("Invalid value for maximum subrecord length");
+ return;
+ }
+
+ compile_options.max_subrecord_length = val;
+}
OSDN Git Service
