addr2line 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 option.
addr2line has two modes of operation.
In the first, hexadecimal addresses are specified on the command line,
and addr2line displays the file name and line number for each
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 chosen addresses.
The format of the output is FILENAME:LINENO. The file name and
line number for each address is printed on a separate line. If the
-f option is used, then each FILENAME:LINENO line is
preceded by a FUNCTIONNAME line which is the name of the function
containing the address.
If the file name or function name can not be determined,
addr2line will print two question marks in their place. If the
line number can not be determined, addr2line will print 0.
The long and short forms of options, shown here as alternatives, are
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.
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 information.
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 absolute addresses.
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.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.1
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 License''.