Back in 2007, commit 0c97c9d437 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().
This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.
Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.
This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.
The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):
Arm: -92 bytes
MIPS: -52 bytes
PPC: -1836 bytes
x86_64: -938 bytes
Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.
Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The result of looking at "grep -F -B2 '*fill*' busybox_unstripped.map"
text data bss dec hex filename
829901 4086 1904 835891 cc133 busybox_before
829665 4086 1904 835655 cc047 busybox
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
invarg(a,b) - "invalid argument", but how a and b enter the message?
invarg_1_to_2(a,b) is somewhat easier to read: "invalid argument 'a' to 'b'"
Audit of usage revealed a number of bad uses, with too long messages.
text data bss dec hex filename
938848 932 17448 957228 e9b2c busybox_old
938788 932 17448 957168 e9af0 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This patch ports the 'ip neigh' command, originally written by Alexey
Kuznetsov, <kuznet@ms2.inr.ac.ru>, to busybox.
The base of the port is the version of iproute that shipped with
Debian Squeeze, taken from:
http://http.debian.net/debian/pool/main/i/iproute/iproute_20100519.orig.tar.gz
This patch has actively been used by the Open Network Install
Environment (ONIE) project for over 3 years without incident.
function old new delta
print_neigh - 933 +933
ipneigh_list_or_flush - 742 +742
get_hz - 109 +109
do_ipneigh - 62 +62
do_iproute 2112 2153 +41
packed_usage 30647 30667 +20
ipneigh_main - 14 +14
static.ip_neigh_commands - 12 +12
static.nuds - 9 +9
static.ip_func_ptrs 32 36 +4
print_route 1858 1727 -131
------------------------------------------------------------------------------
(add/remove: 8/0 grow/shrink: 3/1 up/down: 1946/-131) Total: 1815 bytes
Signed-off-by: Curt Brune <curt@cumulusnetworks.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
