1 /* Release debugging handling context.
2 Copyright (C) 2002-2011, 2014 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <search.h>
35 #include <stdlib.h>
36 #include <assert.h>
37 #include <string.h>
38
39 #include "libdwP.h"
40 #include "cfi.h"
41
42
43 static void
noop_free(void * arg)44 noop_free (void *arg __attribute__ ((unused)))
45 {
46 }
47
48
49 static void
cu_free(void * arg)50 cu_free (void *arg)
51 {
52 struct Dwarf_CU *p = (struct Dwarf_CU *) arg;
53
54 Dwarf_Abbrev_Hash_free (&p->abbrev_hash);
55
56 tdestroy (p->locs, noop_free);
57 }
58
59
60 #if USE_ZLIB
61 void
62 internal_function
__libdw_free_zdata(Dwarf * dwarf)63 __libdw_free_zdata (Dwarf *dwarf)
64 {
65 unsigned int gzip_mask = dwarf->sectiondata_gzip_mask;
66 while (gzip_mask != 0)
67 {
68 int i = ffs (gzip_mask);
69 assert (i > 0);
70 --i;
71 assert (i < IDX_last);
72 free (dwarf->sectiondata[i]);
73 gzip_mask &= ~(1U << i);
74 }
75 }
76 #endif
77
78 int
dwarf_end(dwarf)79 dwarf_end (dwarf)
80 Dwarf *dwarf;
81 {
82 if (dwarf != NULL)
83 {
84 if (dwarf->cfi != NULL)
85 /* Clean up the CFI cache. */
86 __libdw_destroy_frame_cache (dwarf->cfi);
87
88 Dwarf_Sig8_Hash_free (&dwarf->sig8_hash);
89
90 /* The search tree for the CUs. NB: the CU data itself is
91 allocated separately, but the abbreviation hash tables need
92 to be handled. */
93 tdestroy (dwarf->cu_tree, cu_free);
94 tdestroy (dwarf->tu_tree, cu_free);
95
96 /* Search tree for macro opcode tables. */
97 tdestroy (dwarf->macro_ops, noop_free);
98
99 /* Search tree for decoded .debug_lines units. */
100 tdestroy (dwarf->files_lines, noop_free);
101
102 struct libdw_memblock *memp = dwarf->mem_tail;
103 /* The first block is allocated together with the Dwarf object. */
104 while (memp->prev != NULL)
105 {
106 struct libdw_memblock *prevp = memp->prev;
107 free (memp);
108 memp = prevp;
109 }
110
111 /* Free the pubnames helper structure. */
112 free (dwarf->pubnames_sets);
113
114 __libdw_free_zdata (dwarf);
115
116 /* Free the ELF descriptor if necessary. */
117 if (dwarf->free_elf)
118 elf_end (dwarf->elf);
119
120 /* Free the fake location list CU. */
121 free (dwarf->fake_loc_cu);
122
123 /* Free the context descriptor. */
124 free (dwarf);
125 }
126
127 return 0;
128 }
129 INTDEF(dwarf_end)
130