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
|
/*************************************************************************
* Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Error handling.
*/
#include "dimension-internal.h"
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
/** Report internal errors in this file. */
#define DMNSN_LOCAL_ERROR(str) \
do { \
fprintf(stderr, "Dimension ERROR: %s, %s:%u: %s\n", \
DMNSN_FUNC, __FILE__, __LINE__, (str)); \
abort(); \
} while (0)
/** dmnsn_local_lock_mutex implementation. */
static void
dmnsn_local_lock_mutex_impl(pthread_mutex_t *mutex)
{
if (pthread_mutex_lock(mutex) != 0) {
DMNSN_LOCAL_ERROR("Couldn't lock mutex.");
}
}
/** dmnsn_local_unlock_mutex implementation. */
static void
dmnsn_local_unlock_mutex_impl(pthread_mutex_t *mutex)
{
if (pthread_mutex_unlock(mutex) != 0) {
DMNSN_LOCAL_ERROR("Couldn't lock mutex.");
}
}
/** Lock a mutex, bailing out without dmnsn_error() on error. */
#define dmnsn_local_lock_mutex(mutex) \
dmnsn_local_lock_mutex_impl((mutex)); {
/** Unlock a mutex, bailing out without dmnsn_error() on error. */
#define dmnsn_local_unlock_mutex(mutex) \
dmnsn_local_unlock_mutex_impl((mutex)); }
/** The default fatal error handler. */
static void dmnsn_default_fatal_error_fn(void);
/** The current fatal error handler. */
static dmnsn_fatal_error_fn *dmnsn_fatal = dmnsn_default_fatal_error_fn;
/** Mutex which protects \c dmnsn_fatal. */
static pthread_mutex_t dmnsn_fatal_mutex = PTHREAD_MUTEX_INITIALIZER;
/** The current resilience. */
static bool dmnsn_always_die = false;
/** Mutex which protects \c dmnsn_always_die. */
static pthread_mutex_t dmnsn_always_die_mutex = PTHREAD_MUTEX_INITIALIZER;
/* Called by dmnsn_error macro (don't call directly) */
void
dmnsn_report_error(bool die, const char *func, const char *file,
unsigned int line, const char *str)
{
int err = errno;
bool always_die;
dmnsn_local_lock_mutex(&dmnsn_always_die_mutex);
always_die = dmnsn_always_die;
dmnsn_local_unlock_mutex(&dmnsn_always_die_mutex);
fprintf(stderr, "Dimension %s: %s, %s:%u: %s\n",
die ? "ERROR" : "WARNING", func, file, line, str);
if (err != 0) {
fprintf(stderr, "Last error: %d", err);
#if DMNSN_SYS_ERRLIST
if (err >= 0 && err < sys_nerr) {
fprintf(stderr, " (%s)", sys_errlist[err]);
}
#endif
fprintf(stderr, "\n");
}
if (die || always_die) {
/* Prevent infinite recursion if the fatal error function itself calls
dmnsn_error() */
static __thread bool thread_exiting = false;
if (thread_exiting) {
if (die) {
DMNSN_LOCAL_ERROR("Error raised while in error handler, aborting.");
}
} else {
thread_exiting = true;
dmnsn_fatal_error_fn *fatal = dmnsn_get_fatal_error_fn();
fatal();
DMNSN_LOCAL_ERROR("Fatal error handler didn't exit.");
}
}
}
void
dmnsn_die_on_warnings(bool always_die)
{
dmnsn_local_lock_mutex(&dmnsn_always_die_mutex);
dmnsn_always_die = always_die;
dmnsn_local_unlock_mutex(&dmnsn_always_die_mutex);
}
dmnsn_fatal_error_fn *
dmnsn_get_fatal_error_fn(void)
{
dmnsn_fatal_error_fn *fatal;
dmnsn_local_lock_mutex(&dmnsn_fatal_mutex);
fatal = dmnsn_fatal;
dmnsn_local_unlock_mutex(&dmnsn_fatal_mutex);
return fatal;
}
void
dmnsn_set_fatal_error_fn(dmnsn_fatal_error_fn *fatal)
{
dmnsn_local_lock_mutex(&dmnsn_fatal_mutex);
dmnsn_fatal = fatal;
dmnsn_local_unlock_mutex(&dmnsn_fatal_mutex);
}
static void
dmnsn_default_fatal_error_fn(void)
{
/* Print a stack trace to standard error */
dmnsn_backtrace(stderr);
if (dmnsn_is_main_thread()) {
exit(EXIT_FAILURE);
} else {
pthread_exit(NULL);
}
}
|
