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
43static void
44noop_free (void *arg __attribute__ ((unused)))
45{
46}
47
48
49static void
50cu_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
61void
62internal_function
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
78int
79dwarf_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}
129INTDEF(dwarf_end)
130