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- // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
- // 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>
- //
- // This .h file imports the code that causes tcmalloc to override libc
- // versions of malloc/free/new/delete/etc. That is, it provides the
- // logic that makes it so calls to malloc(10) go through tcmalloc,
- // rather than the default (libc) malloc.
- //
- // This file also provides a method: ReplaceSystemAlloc(), that every
- // libc_override_*.h file it #includes is required to provide. This
- // is called when first setting up tcmalloc -- that is, when a global
- // constructor in tcmalloc.cc is executed -- to do any initialization
- // work that may be required for this OS. (Note we cannot entirely
- // control when tcmalloc is initialized, and the system may do some
- // mallocs and frees before this routine is called.) It may be a
- // noop.
- //
- // Every libc has its own way of doing this, and sometimes the compiler
- // matters too, so we have a different file for each libc, and often
- // for different compilers and OS's.
- #ifndef TCMALLOC_LIBC_OVERRIDE_INL_H_
- #define TCMALLOC_LIBC_OVERRIDE_INL_H_
- #include <config.h>
- #ifdef HAVE_FEATURES_H
- #include <features.h> // for __GLIBC__
- #endif
- #include <gperftools/tcmalloc.h>
- static void ReplaceSystemAlloc(); // defined in the .h files below
- // For windows, there are two ways to get tcmalloc. If we're
- // patching, then src/windows/patch_function.cc will do the necessary
- // overriding here. Otherwise, we doing the 'redefine' trick, where
- // we remove malloc/new/etc from mscvcrt.dll, and just need to define
- // them now.
- #if defined(_WIN32) && defined(WIN32_DO_PATCHING)
- void PatchWindowsFunctions(); // in src/windows/patch_function.cc
- static void ReplaceSystemAlloc() { PatchWindowsFunctions(); }
- #elif defined(_WIN32) && !defined(WIN32_DO_PATCHING)
- #include "libc_override_redefine.h"
- #elif defined(__APPLE__)
- #include "libc_override_osx.h"
- #elif defined(__GLIBC__)
- #include "libc_override_glibc.h"
- // Not all gcc systems necessarily support weak symbols, but all the
- // ones I know of do, so for now just assume they all do.
- #elif defined(__GNUC__)
- #include "libc_override_gcc_and_weak.h"
- #else
- #error Need to add support for your libc/OS here
- #endif
- #endif // TCMALLOC_LIBC_OVERRIDE_INL_H_
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