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 (at) 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_ 100