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) 2000-2013 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_libcassert.h"
35 #include "pub_core_tooliface.h" // VG_(needs)
36 #include "pub_core_mallocfree.h"
37 #include "pub_core_options.h"
38 #include "pub_core_replacemalloc.h"
39
40 /*------------------------------------------------------------*/
41 /*--- Command line options ---*/
42 /*------------------------------------------------------------*/
43
44 /* Nb: the allocator always rounds blocks up to a multiple of
45 VG_MIN_MALLOC_SZB.
46 */
47
48 /* DEBUG: print malloc details? default: NO */
49 Bool VG_(clo_trace_malloc) = False;
50
51 /* Minimum alignment in functions that don't specify alignment explicitly.
52 default: 0, i.e. use VG_MIN_MALLOC_SZB. */
53 UInt VG_(clo_alignment) = VG_MIN_MALLOC_SZB;
54
55
VG_(replacement_malloc_process_cmd_line_option)56 Bool VG_(replacement_malloc_process_cmd_line_option)(const HChar* arg)
57 {
58 if VG_INT_CLO(arg, "--alignment", VG_(clo_alignment)) {
59 if (VG_(clo_alignment) < VG_MIN_MALLOC_SZB ||
60 VG_(clo_alignment) > 4096 ||
61 VG_(log2)( VG_(clo_alignment) ) == -1 /* not a power of 2 */)
62 {
63 VG_(fmsg_bad_option)(arg,
64 "Alignment must be a power of 2 in the range %d..4096.\n",
65 VG_MIN_MALLOC_SZB);
66 }
67 }
68
69 else if VG_BOOL_CLO(arg, "--trace-malloc", VG_(clo_trace_malloc)) {}
70 else
71 return False;
72
73 return True;
74 }
75
VG_(malloc_effective_client_redzone_size)76 SizeT VG_(malloc_effective_client_redzone_size)(void)
77 {
78 vg_assert(VG_(needs).malloc_replacement);
79
80 return VG_(arena_redzone_size)(VG_AR_CLIENT);
81 }
82
83 /*------------------------------------------------------------*/
84 /*--- Useful functions ---*/
85 /*------------------------------------------------------------*/
86
VG_(cli_malloc)87 void* VG_(cli_malloc) ( SizeT align, SizeT nbytes )
88 {
89 // 'align' should be valid (ie. big enough and a power of two) by now.
90 // VG_(arena_memalign)() will abort if it's not.
91 if (VG_MIN_MALLOC_SZB == align)
92 return VG_(arena_malloc) ( VG_AR_CLIENT, "replacemalloc.cm.1",
93 nbytes );
94 else
95 return VG_(arena_memalign) ( VG_AR_CLIENT, "replacemalloc.cm.2",
96 align, nbytes );
97 }
98
VG_(cli_free)99 void VG_(cli_free) ( void* p )
100 {
101 VG_(arena_free) ( VG_AR_CLIENT, p );
102 }
103
104 // Useful for querying user blocks.
VG_(cli_malloc_usable_size)105 SizeT VG_(cli_malloc_usable_size) ( void* p )
106 {
107 return VG_(arena_malloc_usable_size)(VG_AR_CLIENT, p);
108 }
109
VG_(addr_is_in_block)110 Bool VG_(addr_is_in_block)( Addr a, Addr start, SizeT size, SizeT rz_szB )
111 {
112 return ( start - rz_szB <= a && a < start + size + rz_szB );
113 }
114
115 /*--------------------------------------------------------------------*/
116 /*--- end ---*/
117 /*--------------------------------------------------------------------*/
118