DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: sw=4 ts=4 et :
 */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Chris Jones <jones.chris.g@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include <errno.h>
#include <new>                  // for std::bad_alloc
#include <string.h>

#include <sys/types.h>

#if defined(MALLOC_H)
#  include MALLOC_H             // for memalign, valloc where available
#endif // if defined(MALLOC_H)
#include <stddef.h>             // for size_t
#include <stdlib.h>             // for malloc, free
#if defined(XP_UNIX)
#  include <unistd.h>           // for valloc on *BSD
#endif //if defined(XP_UNIX)

#if defined(XP_WIN) || (defined(XP_OS2) && defined(__declspec))
#  define MOZALLOC_EXPORT __declspec(dllexport)
#endif

// Make sure that "malloc" et al. resolve to their libc variants.
#define MOZALLOC_DONT_DEFINE_MACRO_WRAPPERS
#include "mozilla/mozalloc.h"
#include "mozilla/mozalloc_oom.h"  // for mozalloc_handle_oom

/* Windows doesn't have malloc_usable_size, but jemalloc has */
#if defined(MOZ_MEMORY_WINDOWS)
extern "C" size_t malloc_usable_size(const void *ptr);
#endif

#if defined(__GNUC__) && (__GNUC__ > 2)
#define LIKELY(x)    (__builtin_expect(!!(x), 1))
#define UNLIKELY(x)  (__builtin_expect(!!(x), 0))
#else
#define LIKELY(x)    (x)
#define UNLIKELY(x)  (x)
#endif

void
moz_free(void* ptr)
{
    free(ptr);
}

void*
moz_xmalloc(size_t size)
{
    void* ptr = malloc(size);
    if (UNLIKELY(!ptr && size)) {
        mozalloc_handle_oom(size);
        return moz_xmalloc(size);
    }
    return ptr;
}
void*
moz_malloc(size_t size)
{
    return malloc(size);
}

void*
moz_xcalloc(size_t nmemb, size_t size)
{
    void* ptr = calloc(nmemb, size);
    if (UNLIKELY(!ptr && nmemb && size)) {
        mozalloc_handle_oom(size);
        return moz_xcalloc(nmemb, size);
    }
    return ptr;
}
void*
moz_calloc(size_t nmemb, size_t size)
{
    return calloc(nmemb, size);
}

void*
moz_xrealloc(void* ptr, size_t size)
{
    void* newptr = realloc(ptr, size);
    if (UNLIKELY(!newptr && size)) {
        mozalloc_handle_oom(size);
        return moz_xrealloc(ptr, size);
    }
    return newptr;
}
void*
moz_realloc(void* ptr, size_t size)
{
    return realloc(ptr, size);
}

char*
moz_xstrdup(const char* str)
{
    char* dup = strdup(str);
    if (UNLIKELY(!dup)) {
        mozalloc_handle_oom(0);
        return moz_xstrdup(str);
    }
    return dup;
}
char*
moz_strdup(const char* str)
{
    return strdup(str);
}

#if defined(HAVE_STRNDUP)
char*
moz_xstrndup(const char* str, size_t strsize)
{
    char* dup = strndup(str, strsize);
    if (UNLIKELY(!dup)) {
        mozalloc_handle_oom(strsize);
        return moz_xstrndup(str, strsize);
    }
    return dup;
}
char*
moz_strndup(const char* str, size_t strsize)
{
    return strndup(str, strsize);
}
#endif  // if defined(HAVE_STRNDUP)

#if defined(HAVE_POSIX_MEMALIGN)
int
moz_xposix_memalign(void **ptr, size_t alignment, size_t size)
{
    int err = posix_memalign(ptr, alignment, size);
    if (UNLIKELY(err && ENOMEM == err)) {
        mozalloc_handle_oom(size);
        return moz_xposix_memalign(ptr, alignment, size);
    }
    // else: (0 == err) or (EINVAL == err)
    return err;
}
int
moz_posix_memalign(void **ptr, size_t alignment, size_t size)
{
    int code = posix_memalign(ptr, alignment, size);
    if (code)
        return code;

#if defined(XP_MACOSX)
    // Workaround faulty OSX posix_memalign, which provides memory with the
    // incorrect alignment sometimes, but returns 0 as if nothing was wrong.
    size_t mask = alignment - 1;
    if (((size_t)(*ptr) & mask) != 0) {
        void* old = *ptr;
        code = moz_posix_memalign(ptr, alignment, size);
        free(old);
    }
#endif

    return code;

}
#endif // if defined(HAVE_POSIX_MEMALIGN)

#if defined(HAVE_MEMALIGN)
void*
moz_xmemalign(size_t boundary, size_t size)
{
    void* ptr = memalign(boundary, size);
    if (UNLIKELY(!ptr && EINVAL != errno)) {
        mozalloc_handle_oom(size);
        return moz_xmemalign(boundary, size);
    }
    // non-NULL ptr or errno == EINVAL
    return ptr;
}
void*
moz_memalign(size_t boundary, size_t size)
{
    return memalign(boundary, size);
}
#endif // if defined(HAVE_MEMALIGN)

#if defined(HAVE_VALLOC)
void*
moz_xvalloc(size_t size)
{
    void* ptr = valloc(size);
    if (UNLIKELY(!ptr)) {
        mozalloc_handle_oom(size);
        return moz_xvalloc(size);
    }
    return ptr;
}
void*
moz_valloc(size_t size)
{
    return valloc(size);
}
#endif // if defined(HAVE_VALLOC)

size_t
moz_malloc_usable_size(void *ptr)
{
    if (!ptr)
        return 0;

#if defined(XP_MACOSX)
    return malloc_size(ptr);
#elif defined(MOZ_MEMORY) || (defined(XP_LINUX) && !defined(ANDROID))
    // Android bionic libc doesn't have malloc_usable_size.
    return malloc_usable_size(ptr);
#elif defined(XP_WIN)
    return _msize(ptr);
#else
    return 0;
#endif
}

size_t moz_malloc_size_of(const void *ptr)
{
    return moz_malloc_usable_size((void *)ptr);
}

namespace mozilla {

const fallible_t fallible = fallible_t();

} // namespace mozilla