The Tor Browser: netwerk/srtp/src/crypto/kernel/alloc.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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  */

    45 #include "alloc.h"

    46 #include "crypto_kernel.h"

    48 /* the debug module for memory allocation */

    50 debug_module_t mod_alloc = {

    51   0,                  /* debugging is off by default */

    52   "alloc"             /* printable name for module   */

    53 };

    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  */

    64 #ifdef SRTP_KERNEL_LINUX

    66 #include <linux/interrupt.h>

    68 void *

    69 crypto_alloc(size_t size) {

    70   void *ptr;

    72   ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);

    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   }

    80   return ptr;

    81 }

    83 void

    84 crypto_free(void *ptr) {

    86   debug_print(mod_alloc, "(location: %p) freed", ptr);

    88   kfree(ptr);

    89 }

    92 #elif defined(HAVE_STDLIB_H)

    94 void *

    95 crypto_alloc(size_t size) {

    96   void *ptr;

    98   ptr = malloc(size);

   100   if (ptr) {

   101     debug_print(mod_alloc, "(location: %p) allocated", ptr);

   102   } else {

   103     debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);

   104   }

   106   return ptr;

   107 }

   109 void

   110 crypto_free(void *ptr) {

   112   debug_print(mod_alloc, "(location: %p) freed", ptr);

   114   free(ptr);

   115 }

   117 #else  /* we need to define our own memory allocation routines */

   119 #error no memory allocation defined yet

   121 #endif

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