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) 2000-2012 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 */
47 Bool 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. */
51 UInt VG_(clo_alignment) = VG_MIN_MALLOC_SZB;
52
53
VG_(replacement_malloc_process_cmd_line_option)54 Bool 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
VG_(cli_malloc)78 void* 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
VG_(cli_free)90 void VG_(cli_free) ( void* p )
91 {
92 VG_(arena_free) ( VG_AR_CLIENT, p );
93 }
94
VG_(addr_is_in_block)95 Bool 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