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Back in 2007, commit 0c97c9d43707 ("'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>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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"Go to:" command was not updating row position, making next "down" movements
for one screenful print empty lines instead of showing the contents.
If the file is whole pages long, "down" movement at EOF was advancing position
+16 bytes, mapping the next portion (entirely past the end of the file),
then finding out that the new position is beyond the EOF, rolling it back
-16 bytes... ending up with this postion pointing *before* the mapped portion.
Any next access (e.g. "move right" key) SEGVs.
function old new delta
hexedit_main 1170 1184 +14
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 1171 1170 -1
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 1169 1202 +33
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 1176 1169 -7
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
remap 173 178 +5
move_mapping_lower 107 109 +2
move_mapping_further 141 143 +2
hexedit_main 1191 1176 -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 9/-15) Total: -6 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This is a must if you need to edit sector 123456789999 on your /dev/disk.
text data bss dec hex filename
922745 481 6832 930058 e310a busybox_old
923023 481 6832 930336 e3220 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 998 1082 +84
restore_term - 29 +29
remap 168 173 +5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 118/0) Total: 118 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 970 998 +28
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main 924 970 +46
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
format_line 197 209 +12
hexedit_main 930 924 -6
redraw_cur_line 104 94 -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 12/-16) Total: -4 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hexedit_main - 930 +930
format_line - 197 +197
remap - 168 +168
move_mapping_further - 141 +141
move_mapping_lower - 107 +107
redraw_cur_line - 104 +104
packed_usage 31802 31812 +10
applet_names 2688 2696 +8
applet_main 1552 1556 +4
applet_suid 97 98 +1
applet_install_loc 194 195 +1
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 5/0 up/down: 1671/0) Total: 1671 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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