llvm-size - print size information¶
:::{program} llvm-size :::
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¶
:::{option} -A
Equivalent to --format with a value of sysv.
:::
:::{option} –arch=
:::{option} -B
Equivalent to --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} –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.
:::
:::{option} -d
Equivalent to --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> 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=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:
$ 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:
$ 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, llvm-size falls back to berkeley
format. When producing darwin format, the tool displays information about
segments and sections:
$ 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 --format with a value of darwin.
:::
:::{option} -o
Equivalent to --radix with a value of 8.
:::
:::{option} –radix=8,
10 (the default) and 16 for octal, decimal and hexadecimal output
respectively.
Example:
$ 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:
$ 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 llvm-size executable. :::
:::{option} -x
Equivalent to --radix with a value of 16.
:::
:::{option} @<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/>.