third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h

   1 // Copyright (c) 2011, Google Inc.
   2 // All rights reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are
   6 // met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright
   9 // notice, this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above
  11 // copyright notice, this list of conditions and the following disclaimer
  12 // in the documentation and/or other materials provided with the
  13 // distribution.
  14 //     * Neither the name of Google Inc. nor the names of its
  15 // contributors may be used to endorse or promote products derived from
  16 // this software without specific prior written permission.
  17 //
  18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 // ---
  31 // Author: Craig Silverstein <opensource@google.com>
  32 //
  33 // Used to override malloc routines on systems that define the
  34 // memory allocation routines to be weak symbols in their libc
  35 // (almost all unix-based systems are like this), on gcc, which
  36 // suppports the 'alias' attribute.
  37
  38 #ifndef TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_
  39 #define TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_
  40
  41 #ifdef HAVE_SYS_CDEFS_H
  42 #include <sys/cdefs.h>    // for __THROW
  43 #endif
  44 #include <gperftools/tcmalloc.h>
  45
  46 #ifndef __THROW    // I guess we're not on a glibc-like system
  47 # define __THROW   // __THROW is just an optimization, so ok to make it ""
  48 #endif
  49
  50 #ifndef __GNUC__
  51 # error libc_override_gcc_and_weak.h is for gcc distributions only.
  52 #endif
  53
  54 #define ALIAS(tc_fn)   __attribute__ ((alias (#tc_fn)))
  55
  56 void* operator new(size_t size) throw (std::bad_alloc)
  57     ALIAS(tc_new);
  58 void operator delete(void* p) __THROW
  59     ALIAS(tc_delete);
  60 void* operator new[](size_t size) throw (std::bad_alloc)
  61     ALIAS(tc_newarray);
  62 void operator delete[](void* p) __THROW
  63     ALIAS(tc_deletearray);
  64 void* operator new(size_t size, const std::nothrow_t& nt) __THROW
  65     ALIAS(tc_new_nothrow);
  66 void* operator new[](size_t size, const std::nothrow_t& nt) __THROW
  67     ALIAS(tc_newarray_nothrow);
  68 void operator delete(void* p, const std::nothrow_t& nt) __THROW
  69     ALIAS(tc_delete_nothrow);
  70 void operator delete[](void* p, const std::nothrow_t& nt) __THROW
  71     ALIAS(tc_deletearray_nothrow);
  72
  73 extern "C" {
  74   void* malloc(size_t size) __THROW               ALIAS(tc_malloc);
  75   void free(void* ptr) __THROW                    ALIAS(tc_free);
  76   void* realloc(void* ptr, size_t size) __THROW   ALIAS(tc_realloc);
  77   void* calloc(size_t n, size_t size) __THROW     ALIAS(tc_calloc);
  78   void cfree(void* ptr) __THROW                   ALIAS(tc_cfree);
  79   void* memalign(size_t align, size_t s) __THROW  ALIAS(tc_memalign);
  80   void* valloc(size_t size) __THROW               ALIAS(tc_valloc);
  81   void* pvalloc(size_t size) __THROW              ALIAS(tc_pvalloc);
  82   int posix_memalign(void** r, size_t a, size_t s) __THROW
  83       ALIAS(tc_posix_memalign);
  84   void malloc_stats(void) __THROW                 ALIAS(tc_malloc_stats);
  85   int mallopt(int cmd, int value) __THROW         ALIAS(tc_mallopt);
  86 #ifdef HAVE_STRUCT_MALLINFO
  87   struct mallinfo mallinfo(void) __THROW          ALIAS(tc_mallinfo);
  88 #endif
  89   size_t malloc_size(void* p) __THROW             ALIAS(tc_malloc_size);
  90   size_t malloc_usable_size(void* p) __THROW      ALIAS(tc_malloc_size);
  91 }   // extern "C"
  92
  93 #undef ALIAS
  94
  95 // No need to do anything at tcmalloc-registration time: we do it all
  96 // via overriding weak symbols (at link time).
  97 static void ReplaceSystemAlloc() { }
  98
  99 #endif  // TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_