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[l4.git] / l4 / pkg / valgrind / src / valgrind-3.6.0-svn / coregrind / m_replacemalloc / replacemalloc_core.c
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 */
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
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_(message)(Vg_UserMsg, 
62             "Invalid --alignment= setting.  "
63             "Should be a power of 2, >= %d, <= 4096.\n",
64             VG_MIN_MALLOC_SZB
65          );
66          VG_(err_bad_option)("--alignment");
67       }
68    }
69
70    else if VG_BOOL_CLO(arg, "--trace-malloc",  VG_(clo_trace_malloc)) {}
71    else 
72       return False;
73
74    return True;
75 }
76
77 /*------------------------------------------------------------*/
78 /*--- Useful functions                                     ---*/
79 /*------------------------------------------------------------*/
80
81 void* VG_(cli_malloc) ( SizeT align, SizeT nbytes )                 
82 {                                                                             
83    // 'align' should be valid (ie. big enough and a power of two) by now.
84    // VG_(arena_memalign)() will abort if it's not.
85    if (VG_MIN_MALLOC_SZB == align)
86       return VG_(arena_malloc)   ( VG_AR_CLIENT, "replacemalloc.cm.1", 
87                                    nbytes ); 
88    else                                                                       
89       return VG_(arena_memalign) ( VG_AR_CLIENT, "replacemalloc.cm.2", 
90                                    align, nbytes );
91 }                                                                             
92
93 void VG_(cli_free) ( void* p )                                   
94 {                                                                             
95    VG_(arena_free) ( VG_AR_CLIENT, p );                          
96 }
97
98 Bool VG_(addr_is_in_block)( Addr a, Addr start, SizeT size, SizeT rz_szB )
99 {
100    return ( start - rz_szB <= a  &&  a < start + size + rz_szB );
101 }
102
103 /*--------------------------------------------------------------------*/
104 /*--- end                                                          ---*/
105 /*--------------------------------------------------------------------*/