1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* 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(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);
}
/* 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];
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 ();
}
}
/* 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;
compile_options.range_check = 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;
}
|
