replacemalloc_core.c revision 9bea4c13fca0e3bb4b719dcb3ed63d47d479294e
1 2/*--------------------------------------------------------------------*/ 3/*--- Malloc replacement. replacemalloc_core.c ---*/ 4/*--------------------------------------------------------------------*/ 5 6/* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2010 Julian Seward 11 jseward@acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29*/ 30 31#include "pub_core_basics.h" 32#include "pub_core_libcbase.h" 33#include "pub_core_libcprint.h" 34#include "pub_core_mallocfree.h" 35#include "pub_core_options.h" 36#include "pub_core_replacemalloc.h" 37 38/*------------------------------------------------------------*/ 39/*--- Command line options ---*/ 40/*------------------------------------------------------------*/ 41 42/* Nb: the allocator always rounds blocks up to a multiple of 43 VG_MIN_MALLOC_SZB. 44*/ 45 46/* DEBUG: print malloc details? default: NO */ 47Bool VG_(clo_trace_malloc) = False; 48 49/* Minimum alignment in functions that don't specify alignment explicitly. 50 default: 0, i.e. use VG_MIN_MALLOC_SZB. */ 51UInt VG_(clo_alignment) = VG_MIN_MALLOC_SZB; 52 53 54Bool VG_(replacement_malloc_process_cmd_line_option)(Char* arg) 55{ 56 if VG_INT_CLO(arg, "--alignment", VG_(clo_alignment)) { 57 if (VG_(clo_alignment) < VG_MIN_MALLOC_SZB || 58 VG_(clo_alignment) > 4096 || 59 VG_(log2)( VG_(clo_alignment) ) == -1 /* not a power of 2 */) 60 { 61 VG_(fmsg_bad_option)(arg, 62 "Alignment must be a power of 2 in the range %d..4096.\n", 63 VG_MIN_MALLOC_SZB); 64 } 65 } 66 67 else if VG_BOOL_CLO(arg, "--trace-malloc", VG_(clo_trace_malloc)) {} 68 else 69 return False; 70 71 return True; 72} 73 74/*------------------------------------------------------------*/ 75/*--- Useful functions ---*/ 76/*------------------------------------------------------------*/ 77 78void* VG_(cli_malloc) ( SizeT align, SizeT nbytes ) 79{ 80 // 'align' should be valid (ie. big enough and a power of two) by now. 81 // VG_(arena_memalign)() will abort if it's not. 82 if (VG_MIN_MALLOC_SZB == align) 83 return VG_(arena_malloc) ( VG_AR_CLIENT, "replacemalloc.cm.1", 84 nbytes ); 85 else 86 return VG_(arena_memalign) ( VG_AR_CLIENT, "replacemalloc.cm.2", 87 align, nbytes ); 88} 89 90void VG_(cli_free) ( void* p ) 91{ 92 VG_(arena_free) ( VG_AR_CLIENT, p ); 93} 94 95Bool VG_(addr_is_in_block)( Addr a, Addr start, SizeT size, SizeT rz_szB ) 96{ 97 return ( start - rz_szB <= a && a < start + size + rz_szB ); 98} 99 100/*--------------------------------------------------------------------*/ 101/*--- end ---*/ 102/*--------------------------------------------------------------------*/ 103