1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/srtp/src/crypto/kernel/alloc.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,121 @@
1.4 +/*
1.5 + * alloc.c
1.6 + *
1.7 + * memory allocation and deallocation
1.8 + *
1.9 + * David A. McGrew
1.10 + * Cisco Systems, Inc.
1.11 + */
1.12 +/*
1.13 + *
1.14 + * Copyright (c) 2001-2006 Cisco Systems, Inc.
1.15 + * All rights reserved.
1.16 + *
1.17 + * Redistribution and use in source and binary forms, with or without
1.18 + * modification, are permitted provided that the following conditions
1.19 + * are met:
1.20 + *
1.21 + * Redistributions of source code must retain the above copyright
1.22 + * notice, this list of conditions and the following disclaimer.
1.23 + *
1.24 + * Redistributions in binary form must reproduce the above
1.25 + * copyright notice, this list of conditions and the following
1.26 + * disclaimer in the documentation and/or other materials provided
1.27 + * with the distribution.
1.28 + *
1.29 + * Neither the name of the Cisco Systems, Inc. nor the names of its
1.30 + * contributors may be used to endorse or promote products derived
1.31 + * from this software without specific prior written permission.
1.32 + *
1.33 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.34 + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.35 + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
1.36 + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
1.37 + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
1.38 + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
1.39 + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
1.40 + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.41 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1.42 + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.43 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
1.44 + * OF THE POSSIBILITY OF SUCH DAMAGE.
1.45 + *
1.46 + */
1.47 +
1.48 +#include "alloc.h"
1.49 +#include "crypto_kernel.h"
1.50 +
1.51 +/* the debug module for memory allocation */
1.52 +
1.53 +debug_module_t mod_alloc = {
1.54 + 0, /* debugging is off by default */
1.55 + "alloc" /* printable name for module */
1.56 +};
1.57 +
1.58 +/*
1.59 + * Nota bene: the debugging statements for crypto_alloc() and
1.60 + * crypto_free() have identical prefixes, which include the addresses
1.61 + * of the memory locations on which they are operating. This fact can
1.62 + * be used to locate memory leaks, by turning on memory debugging,
1.63 + * grepping for 'alloc', then matching alloc and free calls by
1.64 + * address.
1.65 + */
1.66 +
1.67 +#ifdef SRTP_KERNEL_LINUX
1.68 +
1.69 +#include <linux/interrupt.h>
1.70 +
1.71 +void *
1.72 +crypto_alloc(size_t size) {
1.73 + void *ptr;
1.74 +
1.75 + ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
1.76 +
1.77 + if (ptr) {
1.78 + debug_print(mod_alloc, "(location: %p) allocated", ptr);
1.79 + } else {
1.80 + debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
1.81 + }
1.82 +
1.83 + return ptr;
1.84 +}
1.85 +
1.86 +void
1.87 +crypto_free(void *ptr) {
1.88 +
1.89 + debug_print(mod_alloc, "(location: %p) freed", ptr);
1.90 +
1.91 + kfree(ptr);
1.92 +}
1.93 +
1.94 +
1.95 +#elif defined(HAVE_STDLIB_H)
1.96 +
1.97 +void *
1.98 +crypto_alloc(size_t size) {
1.99 + void *ptr;
1.100 +
1.101 + ptr = malloc(size);
1.102 +
1.103 + if (ptr) {
1.104 + debug_print(mod_alloc, "(location: %p) allocated", ptr);
1.105 + } else {
1.106 + debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
1.107 + }
1.108 +
1.109 + return ptr;
1.110 +}
1.111 +
1.112 +void
1.113 +crypto_free(void *ptr) {
1.114 +
1.115 + debug_print(mod_alloc, "(location: %p) freed", ptr);
1.116 +
1.117 + free(ptr);
1.118 +}
1.119 +
1.120 +#else /* we need to define our own memory allocation routines */
1.121 +
1.122 +#error no memory allocation defined yet
1.123 +
1.124 +#endif
