Revert 126020 - Experiment for updating the tcmalloc chromium branch to r144 (gperftools 2.0).

third_party/tcmalloc/chromium/src/libc_override_glibc.h

-// Copyright (c) 2011, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// ---
-// Author: Craig Silverstein <opensource@google.com>
-//
-// Used to override malloc routines on systems that are using glibc.
-
-#ifndef TCMALLOC_LIBC_OVERRIDE_GLIBC_INL_H_
-#define TCMALLOC_LIBC_OVERRIDE_GLIBC_INL_H_
-
-// MALLOC_HOOK_MAYBE_VOLATILE is defined at config.h in the original gperftools.
-// Chromium does this check with the macro __MALLOC_HOOK_VOLATILE.
-// GLibc 2.14+ requires the hook functions be declared volatile, based on the
-// value of the define __MALLOC_HOOK_VOLATILE. For compatibility with
-// older/non-GLibc implementations, provide an empty definition.
-#if !defined(__MALLOC_HOOK_VOLATILE)
-#define MALLOC_HOOK_MAYBE_VOLATILE /**/
-#else
-#define MALLOC_HOOK_MAYBE_VOLATILE __MALLOC_HOOK_VOLATILE
-#endif
-
-#include <config.h>
-#include <features.h>     // for __GLIBC__
-#ifdef HAVE_SYS_CDEFS_H
-#include <sys/cdefs.h>    // for __THROW
-#endif
-#include <gperftools/tcmalloc.h>
-
-#ifndef __GLIBC__
-# error libc_override_glibc.h is for glibc distributions only.
-#endif
-
-// In glibc, the memory-allocation methods are weak symbols, so we can
-// just override them with our own.  If we're using gcc, we can use
-// __attribute__((alias)) to do the overriding easily (exception:
-// Mach-O, which doesn't support aliases).  Otherwise we have to use a
-// function call.
-#if !defined(__GNUC__) || defined(__MACH__)
-
-// This also defines ReplaceSystemAlloc().
-# include "libc_override_redefine.h"  // defines functions malloc()/etc
-
-#else  // #if !defined(__GNUC__) || defined(__MACH__)
-
-// If we get here, we're a gcc system, so do all the overriding we do
-// with gcc.  This does the overriding of all the 'normal' memory
-// allocation.  This also defines ReplaceSystemAlloc().
-# include "libc_override_gcc_and_weak.h"
-
-// We also have to do some glibc-specific overriding.  Some library
-// routines on RedHat 9 allocate memory using malloc() and free it
-// using __libc_free() (or vice-versa).  Since we provide our own
-// implementations of malloc/free, we need to make sure that the
-// __libc_XXX variants (defined as part of glibc) also point to the
-// same implementations.  Since it only matters for redhat, we
-// do it inside the gcc #ifdef, since redhat uses gcc.
-// TODO(csilvers): only do this if we detect we're an old enough glibc?
-
-#define ALIAS(tc_fn)   __attribute__ ((alias (#tc_fn)))
-extern "C" {
-  void* __libc_malloc(size_t size)                ALIAS(tc_malloc);
-  void __libc_free(void* ptr)                     ALIAS(tc_free);
-  void* __libc_realloc(void* ptr, size_t size)    ALIAS(tc_realloc);
-  void* __libc_calloc(size_t n, size_t size)      ALIAS(tc_calloc);
-  void __libc_cfree(void* ptr)                    ALIAS(tc_cfree);
-  void* __libc_memalign(size_t align, size_t s)   ALIAS(tc_memalign);
-  void* __libc_valloc(size_t size)                ALIAS(tc_valloc);
-  void* __libc_pvalloc(size_t size)               ALIAS(tc_pvalloc);
-  int __posix_memalign(void** r, size_t a, size_t s)  ALIAS(tc_posix_memalign);
-}   // extern "C"
-#undef ALIAS
-
-#endif  // #if defined(__GNUC__) && !defined(__MACH__)
-
-
-// We also have to hook libc malloc.  While our work with weak symbols
-// should make sure libc malloc is never called in most situations, it
-// can be worked around by shared libraries with the DEEPBIND
-// environment variable set.  The below hooks libc to call our malloc
-// routines even in that situation.  In other situations, this hook
-// should never be called.
-extern "C" {
-static void* glibc_override_malloc(size_t size, const void *caller) {
-  return tc_malloc(size);
-}
-static void* glibc_override_realloc(void *ptr, size_t size,
-                                    const void *caller) {
-  return tc_realloc(ptr, size);
-}
-static void glibc_override_free(void *ptr, const void *caller) {
-  tc_free(ptr);
-}
-static void* glibc_override_memalign(size_t align, size_t size,
-                                     const void *caller) {
-  return tc_memalign(align, size);
-}
-
-// We should be using __malloc_initialize_hook here, like the #if 0
-// code below.  (See http://swoolley.org/man.cgi/3/malloc_hook.)
-// However, this causes weird linker errors with programs that link
-// with -static, so instead we just assign the vars directly at
-// static-constructor time.  That should serve the same effect of
-// making sure the hooks are set before the first malloc call the
-// program makes.
-#if 0
-#include <malloc.h>  // for __malloc_hook, etc.
-void glibc_override_malloc_init_hook(void) {
-  __malloc_hook = glibc_override_malloc;
-  __realloc_hook = glibc_override_realloc;
-  __free_hook = glibc_override_free;
-  __memalign_hook = glibc_override_memalign;
-}
-
-void (* MALLOC_HOOK_MAYBE_VOLATILE __malloc_initialize_hook)(void)
-    = &glibc_override_malloc_init_hook;
-#endif
-
-void* (* MALLOC_HOOK_MAYBE_VOLATILE __malloc_hook)(size_t, const void*)
-    = &glibc_override_malloc;
-void* (* MALLOC_HOOK_MAYBE_VOLATILE __realloc_hook)(void*, size_t, const void*)
-    = &glibc_override_realloc;
-void (* MALLOC_HOOK_MAYBE_VOLATILE __free_hook)(void*, const void*)
-    = &glibc_override_free;
-void* (* MALLOC_HOOK_MAYBE_VOLATILE __memalign_hook)(size_t,size_t, const void*)
-    = &glibc_override_memalign;
-
-}   // extern "C"
-
-// No need to write ReplaceSystemAlloc(); one of the #includes above
-// did it for us.
-
-#endif  // TCMALLOC_LIBC_OVERRIDE_GLIBC_INL_H_