1
2 /*--------------------------------------------------------------------*/
3 /*--- Address Description. ---*/
4 /*--- hg_addrdescr.c ---*/
5 /*--------------------------------------------------------------------*/
6
7 /*
8 This file is part of Helgrind, a Valgrind tool for detecting errors
9 in threaded programs.
10
11 Copyright (C) 2007-2012 OpenWorks Ltd
12 info@open-works.co.uk
13
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License as
16 published by the Free Software Foundation; either version 2 of the
17 License, or (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 02111-1307, USA.
28
29 The GNU General Public License is contained in the file COPYING.
30 */
31 #include "pub_tool_basics.h"
32 #include "pub_tool_libcbase.h"
33 #include "pub_tool_libcprint.h"
34 #include "pub_tool_libcassert.h"
35 #include "pub_tool_xarray.h"
36 #include "pub_tool_execontext.h"
37 #include "pub_tool_debuginfo.h"
38 #include "pub_tool_threadstate.h"
39 #include "pub_tool_addrinfo.h"
40
41 #include "hg_basics.h"
42 #include "hg_addrdescr.h" /* self */
43
HG_(describe_addr)44 void HG_(describe_addr) ( Addr a, /*OUT*/AddrInfo* ai )
45 {
46 tl_assert(ai->tag == Addr_Undescribed);
47
48 /* hctxt/haddr/hszB describe the addr if it is a heap block. */
49 ExeContext* hctxt;
50 Addr haddr;
51 SizeT hszB;
52
53 /* First, see if it's in any heap block. Unfortunately this
54 means a linear search through all allocated heap blocks. The
55 assertion says that if it's detected as a heap block, then we
56 must have an allocation context for it, since all heap blocks
57 should have an allocation context. */
58 Bool is_heapblock
59 = HG_(mm_find_containing_block)(
60 &hctxt,
61 &haddr,
62 &hszB,
63 a
64 );
65 if (is_heapblock) {
66 tl_assert(is_heapblock == (hctxt != NULL));
67 ai->tag = Addr_Block;
68 ai->Addr.Block.block_kind = Block_Mallocd;
69 ai->Addr.Block.block_desc = "block";
70 ai->Addr.Block.block_szB = hszB;
71 ai->Addr.Block.rwoffset = (Word)(a) - (Word)(haddr);
72 ai->Addr.Block.allocated_at = hctxt;
73 ai->Addr.Block.freed_at = VG_(null_ExeContext)();;
74 } else {
75 /* No block found. Search a non-heap block description. */
76 VG_(describe_addr) (a, ai);
77 }
78 }
79
HG_(get_and_pp_addrdescr)80 Bool HG_(get_and_pp_addrdescr) (Addr addr)
81 {
82
83 Bool ret;
84 AddrInfo glai;
85
86 glai.tag = Addr_Undescribed;
87 HG_(describe_addr) (addr, &glai);
88 VG_(pp_addrinfo) (addr, &glai);
89 ret = glai.tag != Addr_Unknown;
90
91 VG_(clear_addrinfo) (&glai);
92
93 return ret;
94 }
95
96 /*--------------------------------------------------------------------*/
97 /*--- end hg_addrdescr.c ---*/
98 /*--------------------------------------------------------------------*/
99