1 /* $NetBSD: dwarf_dealloc.c,v 1.2 2014/03/09 16:58:03 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "_libdwarf.h"
30
31 __RCSID("$NetBSD: dwarf_dealloc.c,v 1.2 2014/03/09 16:58:03 christos Exp $");
32 ELFTC_VCSID("Id: dwarf_dealloc.c 2073 2011-10-27 03:30:47Z jkoshy ");
33
34 void
dwarf_dealloc(Dwarf_Debug dbg,Dwarf_Ptr p,Dwarf_Unsigned alloc_type)35 dwarf_dealloc(Dwarf_Debug dbg, Dwarf_Ptr p, Dwarf_Unsigned alloc_type)
36 {
37 Dwarf_Abbrev ab;
38 Dwarf_AttrDef ad, tad;
39 Dwarf_Attribute at, tat;
40 Dwarf_Die die;
41
42 /*
43 * This libdwarf implementation does not use the SGI/libdwarf
44 * style of memory allocation. In most cases it does not copy
45 * things to return to the client, so the client does not need
46 * to remember to free them. The remaining cases are handled
47 * below.
48 */
49
50 (void) dbg;
51
52 if (alloc_type == DW_DLA_LIST || alloc_type == DW_DLA_FRAME_BLOCK ||
53 alloc_type == DW_DLA_LOC_BLOCK || alloc_type == DW_DLA_LOCDESC)
54 free(p);
55 else if (alloc_type == DW_DLA_ABBREV) {
56 ab = p;
57 STAILQ_FOREACH_SAFE(ad, &ab->ab_attrdef, ad_next, tad) {
58 STAILQ_REMOVE(&ab->ab_attrdef, ad, _Dwarf_AttrDef,
59 ad_next);
60 free(ad);
61 }
62 free(ab);
63 } else if (alloc_type == DW_DLA_DIE) {
64 die = p;
65 STAILQ_FOREACH_SAFE(at, &die->die_attr, at_next, tat) {
66 STAILQ_REMOVE(&die->die_attr, at,
67 _Dwarf_Attribute, at_next);
68 if (at->at_ld != NULL)
69 free(at->at_ld);
70 free(at);
71 }
72 if (die->die_attrarray)
73 free(die->die_attrarray);
74 free(die);
75 }
76 }
77
78 void
dwarf_srclines_dealloc(Dwarf_Debug dbg,Dwarf_Line * linebuf,Dwarf_Signed count)79 dwarf_srclines_dealloc(Dwarf_Debug dbg, Dwarf_Line *linebuf,
80 Dwarf_Signed count)
81 {
82 /*
83 * In this libdwarf implementation, line information remains
84 * associated with the DIE for a compilation unit for the
85 * lifetime of the DIE. The client does not need to free
86 * the memory returned by `dwarf_srclines()`.
87 */
88
89 (void) dbg; (void) linebuf; (void) count;
90 }
91
92 void
dwarf_ranges_dealloc(Dwarf_Debug dbg,Dwarf_Ranges * ranges,Dwarf_Signed range_count)93 dwarf_ranges_dealloc(Dwarf_Debug dbg, Dwarf_Ranges *ranges,
94 Dwarf_Signed range_count)
95 {
96 /*
97 * In this libdwarf implementation, ranges information is
98 * kept by a STAILQ inside Dwarf_Debug object. The client
99 * does not need to free the memory returned by
100 * `dwarf_get_ranges()` or `dwarf_get_ranges_a()`.
101 */
102
103 (void) dbg; (void) ranges; (void) range_count;
104 }
105
106 void
dwarf_fde_cie_list_dealloc(Dwarf_Debug dbg,Dwarf_Cie * cie_list,Dwarf_Signed cie_count,Dwarf_Fde * fde_list,Dwarf_Signed fde_count)107 dwarf_fde_cie_list_dealloc(Dwarf_Debug dbg, Dwarf_Cie *cie_list,
108 Dwarf_Signed cie_count, Dwarf_Fde *fde_list, Dwarf_Signed fde_count)
109 {
110 /*
111 * In this implementation, FDE and CIE information is managed
112 * as part of the Dwarf_Debug object. The client does not need
113 * to explicitly free these memory arenas.
114 */
115 (void) dbg;
116 (void) cie_list;
117 (void) cie_count;
118 (void) fde_list;
119 (void) fde_count;
120 }
121