The Tor Browser: memory/mozalloc/mozalloc.cpp@6474c204b198 (annotated)

memory/mozalloc/mozalloc.cpp@6474c204b198 (annotated)

memory/mozalloc/mozalloc.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

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

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  * vim: sw=4 ts=4 et :
  */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #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, malloc_size, malloc_usable_size
 #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)
 #  define MOZALLOC_EXPORT __declspec(dllexport)
 #endif
 #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
 #ifdef __GNUC__
 #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(HAVE_MALLOC_USABLE_SIZE) || defined(MOZ_MEMORY)
     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

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memory/mozalloc/mozalloc.cpp@6474c204b198 (annotated)

memory/mozalloc/mozalloc.cpp