/* Handling of compile-time options that influence the library.
- Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2007, 2009, 2010 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.
+
+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"
compile_options_t compile_options;
+volatile sig_atomic_t fatal_error_in_progress = 0;
+
/* A signal handler to allow us to output a backtrace. */
void
-handler (int signum)
+backtrace_handler (int signum)
{
- const char * name = NULL, * desc = NULL;
-
- switch (signum)
- {
-#if defined(SIGSEGV)
- case SIGSEGV:
- name = "SIGSEGV";
- desc = "Segmentation fault";
- break;
-#endif
-
-#if defined(SIGBUS)
- case SIGBUS:
- name = "SIGBUS";
- desc = "Bus error";
- break;
-#endif
-
-#if defined(SIGILL)
- case SIGILL:
- name = "SIGILL";
- desc = "Illegal instruction";
- break;
-#endif
-
-#if defined(SIGFPE)
- case SIGFPE:
- name = "SIGFPE";
- desc = "Floating-point exception";
- break;
-#endif
- }
-
- if (name)
- st_printf ("\nProgram received signal %d (%s): %s.\n", signum, name, desc);
- else
- st_printf ("\nProgram received signal %d.\n", signum);
-
- sys_exit (5);
+ /* 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_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);
}
compile_options.allow_std = options[1];
if (num >= 3)
compile_options.pedantic = options[2];
- if (num >= 4)
- compile_options.dump_core = options[3];
+ /* 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)
if (num >= 8)
compile_options.range_check = options[7];
- /* If backtrace is required, we set signal handlers on most common
- signals. */
-#if defined(HAVE_SIGNAL) && (defined(SIGSEGV) || defined(SIGBUS) \
- || defined(SIGILL) || defined(SIGFPE))
+ /* If backtrace is required, we set signal handlers on the POSIX
+ 2001 signals with core action. */
+#if defined(HAVE_SIGNAL) && (defined(SIGQUIT) || defined(SIGILL) \
+ || defined(SIGABRT) || defined(SIGFPE) \
+ || defined(SIGSEGV) || defined(SIGBUS) \
+ || defined(SIGSYS) || defined(SIGTRAP) \
+ || defined(SIGXCPU) || defined(SIGXFSZ))
if (compile_options.backtrace)
{
+#if defined(SIGQUIT)
+ signal (SIGQUIT, backtrace_handler);
+#endif
+
+#if defined(SIGILL)
+ signal (SIGILL, backtrace_handler);
+#endif
+
+#if defined(SIGABRT)
+ signal (SIGABRT, backtrace_handler);
+#endif
+
+#if defined(SIGFPE)
+ signal (SIGFPE, backtrace_handler);
+#endif
+
#if defined(SIGSEGV)
- signal (SIGSEGV, handler);
+ signal (SIGSEGV, backtrace_handler);
#endif
#if defined(SIGBUS)
- signal (SIGBUS, handler);
+ signal (SIGBUS, backtrace_handler);
#endif
-#if defined(SIGILL)
- signal (SIGILL, handler);
+#if defined(SIGSYS)
+ signal (SIGSYS, backtrace_handler);
#endif
-#if defined(SIGFPE)
- signal (SIGFPE, handler);
+#if defined(SIGTRAP)
+ signal (SIGTRAP, backtrace_handler);
+#endif
+
+#if defined(SIGXCPU)
+ signal (SIGXCPU, backtrace_handler);
+#endif
+
+#if defined(SIGXFSZ)
+ signal (SIGXFSZ, backtrace_handler);
#endif
}
#endif
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_F2008 | GFC_STD_F95 | GFC_STD_F77
- | GFC_STD_GNU | GFC_STD_LEGACY;
+ | GFC_STD_F2008_OBS | GFC_STD_GNU | GFC_STD_LEGACY;
compile_options.pedantic = 0;
- compile_options.dump_core = 0;
compile_options.backtrace = 0;
compile_options.sign_zero = 1;
compile_options.range_check = 1;
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