mirror of git://gcc.gnu.org/git/gcc.git
279 lines
6.9 KiB
C
279 lines
6.9 KiB
C
/* Handling of compile-time options that influence the library.
|
|
Copyright (C) 2005, 2007, 2009, 2010, 2011, 2012
|
|
Free Software Foundation, Inc.
|
|
|
|
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 3, or (at your option)
|
|
any later version.
|
|
|
|
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.
|
|
|
|
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"
|
|
#include <signal.h>
|
|
|
|
|
|
/* Useful compile-time options will be stored in here. */
|
|
compile_options_t compile_options;
|
|
|
|
|
|
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
|
|
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)
|
|
{
|
|
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];
|
|
/* options[7] is the -frange-check option, which no longer affects
|
|
the library behavior; range checking is now always done when
|
|
parsing integers. It's place in the options array is retained due
|
|
to ABI compatibility. Remove when bumping the library ABI. */
|
|
|
|
/* 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 ();
|
|
}
|
|
}
|
|
|
|
|
|
/* Default values for the compile-time options. Keep in sync with
|
|
gcc/fortran/options.c (gfc_init_options). */
|
|
void
|
|
init_compile_options (void)
|
|
{
|
|
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_F2008_OBS | GFC_STD_GNU | GFC_STD_LEGACY;
|
|
compile_options.pedantic = 0;
|
|
compile_options.backtrace = 0;
|
|
compile_options.sign_zero = 1;
|
|
}
|
|
|
|
/* Function called by the front-end to tell us the
|
|
default for unformatted data conversion. */
|
|
|
|
extern void set_convert (int);
|
|
export_proto (set_convert);
|
|
|
|
void
|
|
set_convert (int conv)
|
|
{
|
|
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;
|
|
}
|