1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* Release debugging handling context.
Copyright (C) 2002-2011, 2014, 2018 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
This file is free software; you can redistribute it and/or modify
it under the terms of either
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at
your option) any later version
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at
your option) any later version
or both in parallel, as here.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <search.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include "libdwP.h"
#include "cfi.h"
static void
noop_free (void *arg __attribute__ ((unused)))
{
}
static void
cu_free (void *arg)
{
struct Dwarf_CU *p = (struct Dwarf_CU *) arg;
tdestroy (p->locs, noop_free);
/* Only free the CU internals if its not a fake CU. */
if(p != p->dbg->fake_loc_cu && p != p->dbg->fake_loclists_cu
&& p != p->dbg->fake_addr_cu)
{
Dwarf_Abbrev_Hash_free (&p->abbrev_hash);
/* Free split dwarf one way (from skeleton to split). */
if (p->unit_type == DW_UT_skeleton
&& p->split != NULL && p->split != (void *)-1)
{
/* The fake_addr_cu might be shared, only release one. */
if (p->dbg->fake_addr_cu == p->split->dbg->fake_addr_cu)
p->split->dbg->fake_addr_cu = NULL;
INTUSE(dwarf_end) (p->split->dbg);
}
}
}
int
dwarf_end (Dwarf *dwarf)
{
if (dwarf != NULL)
{
if (dwarf->cfi != NULL)
/* Clean up the CFI cache. */
__libdw_destroy_frame_cache (dwarf->cfi);
Dwarf_Sig8_Hash_free (&dwarf->sig8_hash);
/* The search tree for the CUs. NB: the CU data itself is
allocated separately, but the abbreviation hash tables need
to be handled. */
tdestroy (dwarf->cu_tree, cu_free);
tdestroy (dwarf->tu_tree, cu_free);
/* Search tree for macro opcode tables. */
tdestroy (dwarf->macro_ops, noop_free);
/* Search tree for decoded .debug_lines units. */
tdestroy (dwarf->files_lines, noop_free);
/* And the split Dwarf. */
tdestroy (dwarf->split_tree, noop_free);
/* Free the internally allocated memory. */
for (size_t i = 0; i < dwarf->mem_stacks; i++)
{
struct libdw_memblock *memp = dwarf->mem_tails[i];
while (memp != NULL)
{
struct libdw_memblock *prevp = memp->prev;
free (memp);
memp = prevp;
}
}
if (dwarf->mem_tails != NULL)
free (dwarf->mem_tails);
pthread_rwlock_destroy (&dwarf->mem_rwl);
/* Free the pubnames helper structure. */
free (dwarf->pubnames_sets);
/* Free the ELF descriptor if necessary. */
if (dwarf->free_elf)
elf_end (dwarf->elf);
/* Free the fake location list CU. */
if (dwarf->fake_loc_cu != NULL)
{
cu_free (dwarf->fake_loc_cu);
free (dwarf->fake_loc_cu);
}
if (dwarf->fake_loclists_cu != NULL)
{
cu_free (dwarf->fake_loclists_cu);
free (dwarf->fake_loclists_cu);
}
if (dwarf->fake_addr_cu != NULL)
{
cu_free (dwarf->fake_addr_cu);
free (dwarf->fake_addr_cu);
}
/* Did we find and allocate the alt Dwarf ourselves? */
if (dwarf->alt_fd != -1)
{
INTUSE(dwarf_end) (dwarf->alt_dwarf);
close (dwarf->alt_fd);
}
/* The cached dir we found the Dwarf ELF file in. */
free (dwarf->debugdir);
/* Free the context descriptor. */
free (dwarf);
}
return 0;
}
INTDEF(dwarf_end)
|
