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
|
.\" Copyright (c) 2014 Kai Wang
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: dwarf_next_types_section.3 3116 2014-12-20 18:26:55Z jkoshy $
.\"
.Dd December 20, 2014
.Os
.Dt DWARF_NEXT_TYPES_SECTION 3
.Sh NAME
.Nm dwarf_next_types_section
.Nd step through .debug_types sections in a debug context
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_next_types_section
.Fa "Dwarf_Debug dbg"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_next_types_section
steps through the
.Dq \&.debug_types
sections found in a debug context.
.Pp
Argument
.Ar dbg
should reference a DWARF debug context allocated using
.Xr dwarf_init 3 .
Argument
.Ar err
should point to a location that will hold an error descriptor in case
of an error.
.Pp
When a DWARF debug context is allocated using
.Xr dwarf_init 3 ,
an internal pointer associated with the context will point to the
first
.Dq \&.debug_types
section present in the debug object.
When the application calls function
.Fn dwarf_next_types_section ,
this internal pointer will move to the next
.Dq \&.debug_types
section present.
On stepping past the last
.Dq \&.debug_types
section left in the debug context, function
.Fn dwarf_next_types_section
returns
.Dv DW_DLV_NO_ENTRY .
The next call to the function will restart from the first
.Dq \&.debug_types
section in the debug context.
.Pp
Application code should call function
.Xr dwarf_next_cu_header_c 3
to iterate though the type units associated with the current
.Dq \&.debug_types
section.
.Sh RETURN VALUES
On success, function
.Fn dwarf_next_types_section
returns
.Dv DW_DLV_OK .
.Pp
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets argument
.Ar err .
When there are no more
.Dq \&.debug_types
sections left to traverse, it returns
.Dv DW_DLV_NO_ENTRY .
.Sh COMPATIBILITY
This function is an extension to the
.Xr DWARF 3
API.
.Sh ERRORS
The
.Fn dwarf_next_types_section
function may fail with the following errors:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Argument
.Va dbg
was NULL.
.El
.Sh EXAMPLES
To iterate though every type unit in all the
.Dq \&.debug_types
sections found in a debug context:
.Bd -literal -offset indent
Dwarf_Debug dbg;
Dwarf_Sig8 sig8;
Dwarf_Unsigned typeoff;
Dwarf_Error de;
\&... allocate dbg using dwarf_init() etc ...
do {
while ((ret = dwarf_next_cu_header_c(dbg, 0, NULL, NULL, NULL,
NULL, NULL, NULL, &sig8, &typeoff, NULL, &de)) == DW_DLV_OK) {
/* Access DIEs etc ... */
}
} while (dwarf_next_types_section(dbg, &de) == DW_DLV_OK);
.Ed
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_init 3 ,
.Xr dwarf_next_cu_header_c 3
|
