| Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* |
| 2 | * alloc.c |
| 3 | * |
| 4 | * memory allocation and deallocation |
| 5 | * |
| 6 | * David A. McGrew |
| 7 | * Cisco Systems, Inc. |
| 8 | */ |
| 9 | /* |
| 10 | * |
| 11 | * Copyright (c) 2001-2006 Cisco Systems, Inc. |
| 12 | * All rights reserved. |
| 13 | * |
| 14 | * Redistribution and use in source and binary forms, with or without |
| 15 | * modification, are permitted provided that the following conditions |
| 16 | * are met: |
| 17 | * |
| 18 | * Redistributions of source code must retain the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer. |
| 20 | * |
| 21 | * Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials provided |
| 24 | * with the distribution. |
| 25 | * |
| 26 | * Neither the name of the Cisco Systems, Inc. nor the names of its |
| 27 | * contributors may be used to endorse or promote products derived |
| 28 | * from this software without specific prior written permission. |
| 29 | * |
| 30 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 31 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 32 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 33 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 34 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| 35 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 36 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 37 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 40 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 41 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 42 | * |
| 43 | */ |
| 44 | |
| 45 | #include "alloc.h" |
| 46 | #include "crypto_kernel.h" |
| 47 | |
| 48 | /* the debug module for memory allocation */ |
| 49 | |
| 50 | debug_module_t mod_alloc = { |
| 51 | 0, /* debugging is off by default */ |
| 52 | "alloc" /* printable name for module */ |
| 53 | }; |
| 54 | |
| 55 | /* |
| 56 | * Nota bene: the debugging statements for crypto_alloc() and |
| 57 | * crypto_free() have identical prefixes, which include the addresses |
| 58 | * of the memory locations on which they are operating. This fact can |
| 59 | * be used to locate memory leaks, by turning on memory debugging, |
| 60 | * grepping for 'alloc', then matching alloc and free calls by |
| 61 | * address. |
| 62 | */ |
| 63 | |
| 64 | #ifdef SRTP_KERNEL_LINUX |
| 65 | |
| 66 | #include <linux/interrupt.h> |
| 67 | |
| 68 | void * |
| 69 | crypto_alloc(size_t size) { |
| 70 | void *ptr; |
| 71 | |
| 72 | ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
| 73 | |
| 74 | if (ptr) { |
| 75 | debug_print(mod_alloc, "(location: %p) allocated", ptr); |
| 76 | } else |
| 77 | debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size); |
| 78 | |
| 79 | return ptr; |
| 80 | } |
| 81 | |
| 82 | void |
| 83 | crypto_free(void *ptr) { |
| 84 | |
| 85 | debug_print(mod_alloc, "(location: %p) freed", ptr); |
| 86 | |
| 87 | kfree(ptr); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | #elif defined(HAVE_STDLIB_H) |
| 92 | |
| 93 | void * |
| 94 | crypto_alloc(size_t size) { |
| 95 | void *ptr; |
| 96 | |
| 97 | ptr = malloc(size); |
| 98 | |
| 99 | if (ptr) { |
| 100 | debug_print(mod_alloc, "(location: %p) allocated", ptr); |
| 101 | } else |
| 102 | debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size); |
| 103 | |
| 104 | return ptr; |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | crypto_free(void *ptr) { |
| 109 | |
| 110 | debug_print(mod_alloc, "(location: %p) freed", ptr); |
| 111 | |
| 112 | free(ptr); |
| 113 | } |
| 114 | |
| 115 | #else /* we need to define our own memory allocation routines */ |
| 116 | |
| 117 | #error no memory allocation defined yet |
| 118 | |
| 119 | #endif |