addr2line - convert addresses into file names and line numbers.
addr2line [ -a
[ -b bfdname
[ -e filename
[addr addr ...]
translates addresses into file names and line numbers. Given an
address in an executable or an offset in a section of a relocatable object, it
uses the debugging information to figure out which file name and line number
are associated with it.
The executable or relocatable object to use is specified with the -e
option. The default is the file a.out
. The section in the relocatable
object to use is specified with the -j
has two modes of operation.
In the first, hexadecimal addresses are specified on the command line, and
displays the file name and line number for each address.
In the second, addr2line
reads hexadecimal addresses from standard input,
and prints the file name and line number for each address on standard output.
In this mode, addr2line
may be used in a pipe to convert dynamically
The format of the output is FILENAME:LINENO
. By default each input
address generates one line of output.
Two options can generate additional lines before each FILENAME:LINENO
line (in that order).
If the -a
option is used then a line with the input address is displayed.
If the -f
option is used, then a line with the FUNCTIONNAME
displayed. This is the name of the function containing the address.
One option can generate additional lines after the FILENAME:LINENO
If the -i
option is used and the code at the given address is present
there because of inlining by the compiler then additional lines are displayed
afterwards. One or two extra lines (if the -f
option is used) are
displayed for each inlined function.
Alternatively if the -p
option is used then each input address generates
a single, long, output line containing the address, the function name, the
file name and the line number. If the -i
option has also been used then
any inlined functions will be displayed in the same manner, but on separate
lines, and prefixed by the text (inlined by)
If the file name or function name can not be determined, addr2line
print two question marks in their place. If the line number can not be
will print 0.
The long and short forms of options, shown here as alternatives, are equivalent.
- Display the address before the function name, file and line
number information. The address is printed with a 0x prefix to
easily identify it.
- -b bfdname
- Specify that the object-code format for the object files is
- Decode (demangle) low-level symbol names into
user-level names. Besides removing any initial underscore prepended by the
system, this makes C++ function names readable. Different compilers have
different mangling styles. The optional demangling style argument can be
used to choose an appropriate demangling style for your compiler.
- -e filename
- Specify the name of the executable for which addresses
should be translated. The default file is a.out.
- Display function names as well as file and line number
- Display only the base of each file name.
- If the address belongs to a function that was inlined, the
source information for all enclosing scopes back to the first non-inlined
function will also be printed. For example, if "main" inlines
"callee1" which inlines "callee2", and address is from
"callee2", the source information for "callee1" and
"main" will also be printed.
- Read offsets relative to the specified section instead of
- Make the output more human friendly: each location are
printed on one line. If option -i is specified, lines for all
enclosing scopes are prefixed with (inlined by).
- Read command-line options from file. The options
read are inserted in place of the original @ file option. If
file does not exist, or cannot be read, then the option will be
treated literally, and not removed.
Options in file are separated by whitespace. A whitespace character
may be included in an option by surrounding the entire option in either
single or double quotes. Any character (including a backslash) may be
included by prefixing the character to be included with a backslash. The
file may itself contain additional @ file options; any such
options will be processed recursively.
Info entries for binutils
Copyright (c) 1991-2017 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document under the
terms of the GNU Free Documentation License, Version 1.3 or any later version
published by the Free Software Foundation; with no Invariant Sections, with no
Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is
included in the section entitled "GNU Free Documentation