llvm-size - print size information
==================================
.. program:: llvm-size
SYNOPSIS
--------
:program:`llvm-size` [*options*] [*input...*]
DESCRIPTION
-----------
:program:`llvm-size` is a tool that prints size information for binary files.
It is intended to be a drop-in replacement for GNU's :program:`size`.
The tool prints size information for each ``input`` specified. If no input is
specified, the program prints size information for ``a.out``. If "``-``" is
specified as an input file, :program:`llvm-size` reads a file from the standard
input stream. If an input is an archive, size information will be displayed for
all its members.
OPTIONS
-------
.. option:: -A
Equivalent to :option:`--format` with a value of ``sysv``.
.. option:: --arch=<arch>
Architecture(s) from Mach-O universal binaries to display information for.
.. option:: -B
Equivalent to :option:`--format` with a value of ``berkeley``.
.. option:: --common
Include ELF common symbol sizes in bss size for ``berkeley`` output format, or
as a separate section entry for ``sysv`` output. If not specified, these
symbols are ignored.
.. option:: -d
Equivalent to :option:`--radix` with a value of ``10``.
.. option:: -l
Display verbose address and offset information for segments and sections in
Mach-O files in ``darwin`` format.
.. option:: --format=<format>
Set the output format to the ``<format>`` specified. Available ``<format>``
options are ``berkeley`` (the default), ``sysv`` and ``darwin``.
Berkeley output summarises text, data and bss sizes in each file, as shown
below for a typical pair of ELF files:
.. code-block:: console
$ llvm-size --format=berkeley test.o test2.o
text data bss dec hex filename
182 16 5 203 cb test.elf
82 8 1 91 5b test2.o
For Mach-O files, the output format is slightly different:
.. code-block:: console
$ llvm-size --format=berkeley macho.obj macho2.obj
__TEXT __DATA __OBJC others dec hex
4 8 0 0 12 c macho.obj
16 32 0 0 48 30 macho2.obj
Sysv output displays size and address information for most sections, with each
file being listed separately:
.. code-block:: console
$ llvm-size --format=sysv test.elf test2.o
test.elf :
section size addr
.eh_frame 92 2097496
.text 90 2101248
.data 16 2105344
.bss 5 2105360
.comment 209 0
Total 412
test2.o :
section size addr
.text 26 0
.data 8 0
.bss 1 0
.comment 106 0
.note.GNU-stack 0 0
.eh_frame 56 0
.llvm_addrsig 2 0
Total 199
``darwin`` format only affects Mach-O input files. If an input of a different
file format is specified, :program:`llvm-size` falls back to ``berkeley``
format. When producing ``darwin`` format, the tool displays information about
segments and sections:
.. code-block:: console
$ llvm-size --format=darwin macho.obj macho2.obj
macho.obj:
Segment : 12
Section (__TEXT, __text): 4
Section (__DATA, __data): 8
total 12
total 12
macho2.obj:
Segment : 48
Section (__TEXT, __text): 16
Section (__DATA, __data): 32
total 48
total 48
.. option:: --help, -h
Display a summary of command line options.
.. option:: -m
Equivalent to :option:`--format` with a value of ``darwin``.
.. option:: -o
Equivalent to :option:`--radix` with a value of ``8``.
.. option:: --radix=<value>
Display size information in the specified radix. Permitted values are ``8``,
``10`` (the default) and ``16`` for octal, decimal and hexadecimal output
respectively.
Example:
.. code-block:: console
$ llvm-size --radix=8 test.o
text data bss oct hex filename
0152 04 04 162 72 test.o
$ llvm-size --radix=10 test.o
text data bss dec hex filename
106 4 4 114 72 test.o
$ llvm-size --radix=16 test.o
text data bss dec hex filename
0x6a 0x4 0x4 114 72 test.o
.. option:: --totals, -t
Applies only to ``berkeley`` output format. Display the totals for all listed
fields, in addition to the individual file listings.
Example:
.. code-block:: console
$ llvm-size --totals test.elf test2.o
text data bss dec hex filename
182 16 5 203 cb test.elf
82 8 1 91 5b test2.o
264 24 6 294 126 (TOTALS)
.. option:: --version
Display the version of the :program:`llvm-size` executable.
.. option:: -x
Equivalent to :option:`--radix` with a value of ``16``.
.. option:: @<FILE>
Read command-line options from response file ``<FILE>``.
EXIT STATUS
-----------
:program:`llvm-size` exits with a non-zero exit code if there is an error.
Otherwise, it exits with code 0.
BUGS
----
To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-size/>.
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