| 1 | /* Shared general utility routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
| 4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
| 5 | 2009, 2010, 2011 Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #ifdef GDBSERVER |
| 23 | #include "server.h" |
| 24 | #else |
| 25 | #include "defs.h" |
| 26 | #endif |
| 27 | |
| 28 | #include "gdb_assert.h" |
| 29 | |
| 30 | #include <stdlib.h> |
| 31 | #include <stdio.h> |
| 32 | |
| 33 | /* The xmalloc() (libiberty.h) family of memory management routines. |
| 34 | |
| 35 | These are like the ISO-C malloc() family except that they implement |
| 36 | consistent semantics and guard against typical memory management |
| 37 | problems. */ |
| 38 | |
| 39 | /* NOTE: These are declared using PTR to ensure consistency with |
| 40 | "libiberty.h". xfree() is GDB local. */ |
| 41 | |
| 42 | PTR /* ARI: PTR */ |
| 43 | xmalloc (size_t size) |
| 44 | { |
| 45 | void *val; |
| 46 | |
| 47 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 48 | semantics. It never returns NULL. */ |
| 49 | if (size == 0) |
| 50 | size = 1; |
| 51 | |
| 52 | val = malloc (size); /* ARI: malloc */ |
| 53 | if (val == NULL) |
| 54 | malloc_failure (size); |
| 55 | |
| 56 | return val; |
| 57 | } |
| 58 | |
| 59 | PTR /* ARI: PTR */ |
| 60 | xrealloc (PTR ptr, size_t size) /* ARI: PTR */ |
| 61 | { |
| 62 | void *val; |
| 63 | |
| 64 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 65 | semantics. It never returns NULL. */ |
| 66 | if (size == 0) |
| 67 | size = 1; |
| 68 | |
| 69 | if (ptr != NULL) |
| 70 | val = realloc (ptr, size); /* ARI: realloc */ |
| 71 | else |
| 72 | val = malloc (size); /* ARI: malloc */ |
| 73 | if (val == NULL) |
| 74 | malloc_failure (size); |
| 75 | |
| 76 | return val; |
| 77 | } |
| 78 | |
| 79 | PTR /* ARI: PTR */ |
| 80 | xcalloc (size_t number, size_t size) |
| 81 | { |
| 82 | void *mem; |
| 83 | |
| 84 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 85 | semantics. It never returns NULL. */ |
| 86 | if (number == 0 || size == 0) |
| 87 | { |
| 88 | number = 1; |
| 89 | size = 1; |
| 90 | } |
| 91 | |
| 92 | mem = calloc (number, size); /* ARI: xcalloc */ |
| 93 | if (mem == NULL) |
| 94 | malloc_failure (number * size); |
| 95 | |
| 96 | return mem; |
| 97 | } |
| 98 | |
| 99 | void * |
| 100 | xzalloc (size_t size) |
| 101 | { |
| 102 | return xcalloc (1, size); |
| 103 | } |
| 104 | |
| 105 | void |
| 106 | xfree (void *ptr) |
| 107 | { |
| 108 | if (ptr != NULL) |
| 109 | free (ptr); /* ARI: free */ |
| 110 | } |
| 111 | |
| 112 | /* Like asprintf/vasprintf but get an internal_error if the call |
| 113 | fails. */ |
| 114 | |
| 115 | char * |
| 116 | xstrprintf (const char *format, ...) |
| 117 | { |
| 118 | char *ret; |
| 119 | va_list args; |
| 120 | |
| 121 | va_start (args, format); |
| 122 | ret = xstrvprintf (format, args); |
| 123 | va_end (args); |
| 124 | return ret; |
| 125 | } |
| 126 | |
| 127 | char * |
| 128 | xstrvprintf (const char *format, va_list ap) |
| 129 | { |
| 130 | char *ret = NULL; |
| 131 | int status = vasprintf (&ret, format, ap); |
| 132 | |
| 133 | /* NULL is returned when there was a memory allocation problem, or |
| 134 | any other error (for instance, a bad format string). A negative |
| 135 | status (the printed length) with a non-NULL buffer should never |
| 136 | happen, but just to be sure. */ |
| 137 | if (ret == NULL || status < 0) |
| 138 | internal_error (__FILE__, __LINE__, _("vasprintf call failed")); |
| 139 | return ret; |
| 140 | } |
| 141 | |
| 142 | void |
| 143 | xasprintf (char **ret, const char *format, ...) |
| 144 | { |
| 145 | va_list args; |
| 146 | |
| 147 | va_start (args, format); |
| 148 | (*ret) = xstrvprintf (format, args); |
| 149 | va_end (args); |
| 150 | } |
| 151 | |
| 152 | void |
| 153 | xvasprintf (char **ret, const char *format, va_list ap) |
| 154 | { |
| 155 | (*ret) = xstrvprintf (format, ap); |
| 156 | } |
| 157 | |
| 158 | int |
| 159 | xsnprintf (char *str, size_t size, const char *format, ...) |
| 160 | { |
| 161 | va_list args; |
| 162 | int ret; |
| 163 | |
| 164 | va_start (args, format); |
| 165 | ret = vsnprintf (str, size, format, args); |
| 166 | gdb_assert (ret < size); |
| 167 | va_end (args); |
| 168 | |
| 169 | return ret; |
| 170 | } |