| 1 | /* Shared allocation functions for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* This file is unusual. |
| 21 | |
| 22 | Because both libiberty and readline define xmalloc and friends, the |
| 23 | functions in this file can't appear in a library -- that will cause |
| 24 | link errors. |
| 25 | |
| 26 | And, because we want to turn the common code into a library, this |
| 27 | file can't live there. |
| 28 | |
| 29 | So, it lives in gdb and is built separately by gdb and gdbserver. |
| 30 | Please be aware of this when modifying it. |
| 31 | |
| 32 | This also explains why this file includes common-defs.h and not |
| 33 | defs.h or server.h -- we'd prefer to avoid depending on the |
| 34 | GDBSERVER define when possible, and for this file it seemed |
| 35 | simple to do so. */ |
| 36 | |
| 37 | #include "gdbsupport/common-defs.h" |
| 38 | #include "libiberty.h" |
| 39 | #include "gdbsupport/errors.h" |
| 40 | |
| 41 | /* The xmalloc() (libiberty.h) family of memory management routines. |
| 42 | |
| 43 | These are like the ISO-C malloc() family except that they implement |
| 44 | consistent semantics and guard against typical memory management |
| 45 | problems. */ |
| 46 | |
| 47 | /* NOTE: These are declared using PTR to ensure consistency with |
| 48 | "libiberty.h". xfree() is GDB local. */ |
| 49 | |
| 50 | PTR /* ARI: PTR */ |
| 51 | xmalloc (size_t size) |
| 52 | { |
| 53 | void *val; |
| 54 | |
| 55 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 56 | semantics. It never returns NULL. */ |
| 57 | if (size == 0) |
| 58 | size = 1; |
| 59 | |
| 60 | val = malloc (size); /* ARI: malloc */ |
| 61 | if (val == NULL) |
| 62 | malloc_failure (size); |
| 63 | |
| 64 | return val; |
| 65 | } |
| 66 | |
| 67 | PTR /* ARI: PTR */ |
| 68 | xrealloc (PTR ptr, size_t size) /* ARI: PTR */ |
| 69 | { |
| 70 | void *val; |
| 71 | |
| 72 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 73 | semantics. It never returns NULL. */ |
| 74 | if (size == 0) |
| 75 | size = 1; |
| 76 | |
| 77 | if (ptr != NULL) |
| 78 | val = realloc (ptr, size); /* ARI: realloc */ |
| 79 | else |
| 80 | val = malloc (size); /* ARI: malloc */ |
| 81 | if (val == NULL) |
| 82 | malloc_failure (size); |
| 83 | |
| 84 | return val; |
| 85 | } |
| 86 | |
| 87 | PTR /* ARI: PTR */ |
| 88 | xcalloc (size_t number, size_t size) |
| 89 | { |
| 90 | void *mem; |
| 91 | |
| 92 | /* See libiberty/xmalloc.c. This function need's to match that's |
| 93 | semantics. It never returns NULL. */ |
| 94 | if (number == 0 || size == 0) |
| 95 | { |
| 96 | number = 1; |
| 97 | size = 1; |
| 98 | } |
| 99 | |
| 100 | mem = calloc (number, size); /* ARI: xcalloc */ |
| 101 | if (mem == NULL) |
| 102 | malloc_failure (number * size); |
| 103 | |
| 104 | return mem; |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | xmalloc_failed (size_t size) |
| 109 | { |
| 110 | malloc_failure (size); |
| 111 | } |