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
|
/**
* This file is part of Hercules.
* http://herc.ws - http://github.com/HerculesWS/Hercules
*
* Copyright (C) 2012-2020 Hercules Dev Team
* Copyright (C) Athena Dev Teams
*
* Hercules 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define HERCULES_CORE
#include "nullpo.h"
#include "common/showmsg.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_LIBBACKTRACE
#include "libbacktrace/backtrace.h"
#include "libbacktrace/backtrace-supported.h"
#elif defined(HAVE_EXECINFO)
#include <execinfo.h>
#endif // HAVE_LIBBACKTRACE
static struct nullpo_interface nullpo_s;
struct nullpo_interface *nullpo;
#ifdef HAVE_LIBBACKTRACE
static void nullpo_error_callback(void *data, const char *msg, int errnum)
{
ShowError("Error: %s (%d)", msg, errnum);
}
static int nullpo_print_callback(void *data, uintptr_t pc, const char *filename, int lineno, const char *function)
{
ShowError("0x%lx %s\n",
(unsigned long) pc,
function == NULL ? "???" : function);
ShowError("\t%s:%d\n",
filename == NULL ? "???" : filename,
lineno);
return 0;
}
static void nullpo_backtrace_print(struct backtrace_state *state)
{
backtrace_full(state, 0, nullpo_print_callback, nullpo_error_callback, state);
}
#endif // HAVE_LIBBACKTRACE
/**
* Reports failed assertions or NULL pointers
*
* @param file Source file where the error was detected
* @param line Line
* @param func Function
* @param targetname Name of the checked symbol
* @param title Message title to display (i.e. failed assertion or nullpo info)
*/
static void assert_report(const char *file, int line, const char *func, const char *targetname, const char *title)
{
if (file == NULL)
file = "??";
if (func == NULL || *func == '\0')
func = "unknown";
ShowError("--- %s --------------------------------------------\n", title);
ShowError("%s:%d: '%s' in function `%s'\n", file, line, targetname, func);
#ifdef HAVE_LIBBACKTRACE
if (nullpo->backtrace_state != NULL)
nullpo_backtrace_print(nullpo->backtrace_state);
#elif defined(HAVE_EXECINFO)
void *array[10];
int size = (int)backtrace(array, 10);
char **strings = backtrace_symbols(array, size);
for (int i = 0; i < size; i++)
ShowError("%s\n", strings[i]);
free(strings);
#endif // HAVE_LIBBACKTRACE
ShowError("--- end %s ----------------------------------------\n", title);
}
static void nullpo_init(void)
{
#ifdef HAVE_LIBBACKTRACE
nullpo->backtrace_state = backtrace_create_state("hercules", BACKTRACE_SUPPORTS_THREADS, nullpo_error_callback, NULL);
#endif
}
static void nullpo_final(void)
{
// FIXME: libbacktrace doesn't provide a backtrace_free_state, and it's unsafe to pass the state to
// backtrace_free (the function itself uses the state internally). For the time being, we'll leave the state
// allocated until program termination as shown in their examples.
}
/**
*
**/
void nullpo_defaults(void)
{
nullpo = &nullpo_s;
nullpo->init = nullpo_init;
nullpo->final = nullpo_final;
nullpo->assert_report = assert_report;
nullpo->backtrace_state = NULL;
}
|
