llvm-size - print size information

SYNOPSIS

llvm-size [options] [input...]

DESCRIPTION

llvm-size is a tool that prints size information for binary files. It is intended to be a drop-in replacement for GNU’s 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, 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

-A

Equivalent to --format with a value of sysv.

--arch=<arch>

Architecture(s) from Mach-O universal binaries to display information for.

-B

Equivalent to --format with a value of berkeley.

--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.

--exclude-pagezero

Do not include the __PAGEZERO segment when calculating size information for Mach-O files. The __PAGEZERO segment is a virtual memory region used for memory protection that does not contribute to actual size, and excluding can provide a better representation of actual size.

-d

Equivalent to --radix with a value of 10.

-l

Display verbose address and offset information for segments and sections in Mach-O files in darwin format.

--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:

$ llvm-size--format=berkeleytest.otest2.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:

$ llvm-size--format=berkeleymacho.objmacho2.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:

$ llvm-size--format=sysvtest.elftest2.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, llvm-size falls back to berkeley format. When producing darwin format, the tool displays information about segments and sections:

$ llvm-size--format=darwinmacho.objmacho2.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
--help, -h

Display a summary of command line options.

-m

Equivalent to --format with a value of darwin.

-o

Equivalent to --radix with a value of 8.

--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:

$ llvm-size--radix=8test.o
 text data bss oct hex filename
 0152 04 04 162 72 test.o
$ llvm-size--radix=10test.o
 text data bss dec hex filename
 106 4 4 114 72 test.o
$ llvm-size--radix=16test.o
 text data bss dec hex filename
 0x6a 0x4 0x4 114 72 test.o
--totals, -t

Applies only to berkeley output format. Display the totals for all listed fields, in addition to the individual file listings.

Example:

$ llvm-size--totalstest.elftest2.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)
--version

Display the version of the llvm-size executable.

-x

Equivalent to --radix with a value of 16.

@<FILE>

Read command-line options from response file <FILE>.

EXIT STATUS

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/>.