15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011, Google Inc. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Redistribution and use in source and binary forms, with or without 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// modification, are permitted provided that the following conditions are 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// met: 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions of source code must retain the above copyright 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// notice, this list of conditions and the following disclaimer. 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions in binary form must reproduce the above 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// copyright notice, this list of conditions and the following disclaimer 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in the documentation and/or other materials provided with the 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// distribution. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Neither the name of Google Inc. nor the names of its 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// contributors may be used to endorse or promote products derived from 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// this software without specific prior written permission. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// --- 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: Craig Silverstein <opensource@google.com> 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This .h file imports the code that causes tcmalloc to override libc 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// versions of malloc/free/new/delete/etc. That is, it provides the 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// logic that makes it so calls to malloc(10) go through tcmalloc, 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// rather than the default (libc) malloc. 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file also provides a method: ReplaceSystemAlloc(), that every 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// libc_override_*.h file it #includes is required to provide. This 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// is called when first setting up tcmalloc -- that is, when a global 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// constructor in tcmalloc.cc is executed -- to do any initialization 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// work that may be required for this OS. (Note we cannot entirely 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// control when tcmalloc is initialized, and the system may do some 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// mallocs and frees before this routine is called.) It may be a 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// noop. 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Every libc has its own way of doing this, and sometimes the compiler 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// matters too, so we have a different file for each libc, and often 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// for different compilers and OS's. 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef TCMALLOC_LIBC_OVERRIDE_INL_H_ 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define TCMALLOC_LIBC_OVERRIDE_INL_H_ 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <config.h> 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef HAVE_FEATURES_H 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <features.h> // for __GLIBC__ 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <gperftools/tcmalloc.h> 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void ReplaceSystemAlloc(); // defined in the .h files below 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// For windows, there are two ways to get tcmalloc. If we're 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// patching, then src/windows/patch_function.cc will do the necessary 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// overriding here. Otherwise, we doing the 'redefine' trick, where 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// we remove malloc/new/etc from mscvcrt.dll, and just need to define 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// them now. 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(_WIN32) && defined(WIN32_DO_PATCHING) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void PatchWindowsFunctions(); // in src/windows/patch_function.cc 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void ReplaceSystemAlloc() { PatchWindowsFunctions(); } 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(_WIN32) && !defined(WIN32_DO_PATCHING) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "libc_override_redefine.h" is included in the original gperftools. But, 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// we define allocator functions in Chromium's base/allocator/allocator_shim.cc 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// on Windows. We don't include libc_override_redefine.h here. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ReplaceSystemAlloc() is defined here instead. 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void ReplaceSystemAlloc() { } 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__APPLE__) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "libc_override_osx.h" 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__GLIBC__) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "libc_override_glibc.h" 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Not all gcc systems necessarily support weak symbols, but all the 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ones I know of do, so for now just assume they all do. 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__GNUC__) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "libc_override_gcc_and_weak.h" 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#error Need to add support for your libc/OS here 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // TCMALLOC_LIBC_OVERRIDE_INL_H_ 95