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
|
/* Find line information for address.
Copyright (C) 2004, 2005 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2004.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "libdwP.h"
#include <assert.h>
Dwarf_Line *
dwarf_getsrc_die (Dwarf_Die *cudie, Dwarf_Addr addr)
{
Dwarf_Lines *lines;
size_t nlines;
if (INTUSE(dwarf_getsrclines) (cudie, &lines, &nlines) != 0)
return NULL;
/* The lines are sorted by address, so we can use binary search. */
size_t l = 0, u = nlines;
while (l < u)
{
size_t idx = (l + u) / 2;
if (addr < lines->info[idx].addr)
u = idx;
else if (addr > lines->info[idx].addr)
l = idx + 1;
else
return &lines->info[idx];
}
if (nlines > 0)
assert (lines->info[nlines - 1].end_sequence);
/* If none were equal, the closest one below is what we want. We
never want the last one, because it's the end-sequence marker
with an address at the high bound of the CU's code. If the debug
information is faulty and no end-sequence marker is present, we
still ignore it. */
if (u > 0 && u < nlines && addr > lines->info[u - 1].addr)
return &lines->info[u - 1];
__libdw_seterrno (DWARF_E_ADDR_OUTOFRANGE);
return NULL;
}
|
