Age | Commit message (Collapse) | Author |
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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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function old new delta
options 552 599 +47
expand_one_var 2375 2385 +10
optletters_optnames 60 64 +4
hush_main 1108 1111 +3
ash_main 1150 1152 +2
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(add/remove: 0/0 grow/shrink: 5/0 up/down: 66/0) Total: 66 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
expand_one_var 2362 2375 +13
hush_main 1104 1108 +4
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 17/0) Total: 17 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
builtin_history 16 20 +4
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
expand_one_var 2311 2362 +51
hush_main 1075 1104 +29
parse_dollar 790 791 +1
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(add/remove: 0/0 grow/shrink: 3/0 up/down: 81/0) Total: 81 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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"env - hush SCRIPT" invocation (that is, with empty environment)
should not show PS1/2 in "set" output.
function old new delta
hush_main 1070 1075 +5
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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"env - hush" invocation (that is, with empty environment)
should not show LINENO in "set" output.
function old new delta
get_local_var_value 263 294 +31
hush_main 1105 1070 -35
handle_changed_special_names 79 38 -41
run_pipe 1834 1765 -69
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(add/remove: 0/0 grow/shrink: 1/3 up/down: 31/-145) Total: -114 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Assignments / exports / unsets of variables are far more frequent than
prompt printing, and if we show prompt, we are likely to be limited by
user typing speed - do not optimize for that scenario.
Just re-query $PS1 / $PS2 values when need to show the prompt.
function old new delta
fgetc_interactive 236 259 +23
set_vars_and_save_old 150 147 -3
pseudo_exec_argv 597 594 -3
hush_main 1110 1105 -5
enter_var_nest_level 38 32 -6
builtin_local 56 50 -6
run_pipe 1857 1834 -23
leave_var_nest_level 127 98 -29
handle_changed_special_names 111 79 -32
cmdedit_update_prompt 57 - -57
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(add/remove: 0/1 grow/shrink: 1/8 up/down: 23/-164) Total: -141 bytes
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
expand_one_var 2296 2311 +15
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
helper_export_local 215 253 +38
leave_var_nest_level 107 127 +20
run_pipe 1840 1857 +17
handle_changed_special_names 101 105 +4
shell_builtin_read 1399 1398 -1
done_word 767 766 -1
parse_stream 2249 2245 -4
set_local_var 437 430 -7
is_well_formed_var_name 66 - -66
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(add/remove: 0/1 grow/shrink: 4/4 up/down: 79/-79) Total: 0 bytes
text data bss dec hex filename
952376 485 7296 960157 ea69d busybox_old
952400 485 7296 960181 ea6b5 busybox_unstripped
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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Bash 5.0 added the dynamic variable EPOCHSECONDS and EPOCHREALTIME
which return the number of seconds since the Unix Epoch as an
integer or float. These are useful for logging or tracing.
function old new delta
get_local_var_value 207 302 +95
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 95/0) Total: 95 bytes
text data bss dec hex filename
938702 4203 1888 944793 e6a99 busybox_old
938797 4203 1888 944888 e6af8 busybox_unstripped
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
checkjobs 163 183 +20
process_wait_result 449 463 +14
leave_var_nest_level 98 107 +9
enter_var_nest_level 32 38 +6
set_vars_and_save_old 147 150 +3
builtin_local 53 56 +3
builtin_wait 322 323 +1
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(add/remove: 0/0 grow/shrink: 7/0 up/down: 56/0) Total: 56 bytes
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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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
sigprocmask2 - 8 +8
wait_for_child_or_signal 213 218 +5
dowait 424 429 +5
block_CHLD_HUP_ALRM 62 59 -3
sigprocmask_SIG_SETMASK 16 - -16
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(add/remove: 1/1 grow/shrink: 2/1 up/down: 18/-19) Total: -1 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
sigprocmask_SIG_SETMASK - 16 +16
wait_for_child_or_signal 221 213 -8
dowait 432 424 -8
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Embedded scripts require a shell to be present in the BusyBox
binary. Allow either ash or hush to be used for this purpose.
If both are enabled ash takes precedence.
The size of the binary is unchanged in the default configuration:
both ash and hush are present but support for embedded scripts
isn't compiled into hush.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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The HUSH_TICK configuration option enables command substitution,
not process substitution.
Signed-off-by: Ron Yorston <rmy@pobox.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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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
getoptscmd 587 584 -3
readcmd 240 224 -16
shell_builtin_read 1426 1399 -27
builtin_read 210 182 -28
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(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-74) Total: -74 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
hush_main 1095 1110 +15
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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Closes 2695
function old new delta
parse_dollar 762 790 +28
subevalvar 1258 1267 +9
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 37/0) Total: 37 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
first_special_char_in_vararg - 52 +52
expand_one_var 2248 2296 +48
encode_then_expand_vararg 357 336 -21
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(add/remove: 1/0 grow/shrink: 1/1 up/down: 100/-21) Total: 79 bytes
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
run_list 1063 1046 -17
parse_stream 2296 2249 -47
run_pipe 1890 1840 -50
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(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-114) Total: -114 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
x_mode_print_optionally_squoted - 120 +120
x_mode_flush - 68 +68
save_fd_on_redirect 208 243 +35
x_mode_prefix - 27 +27
x_mode_addblock - 23 +23
x_mode_addchr - 17 +17
dump_cmd_in_x_mode 110 85 -25
run_pipe 1919 1890 -29
print_optionally_squoted 145 - -145
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(add/remove: 5/1 grow/shrink: 1/2 up/down: 290/-199) Total: 91 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
print_optionally_squoted - 145 +145
run_pipe 1902 1919 +17
dump_cmd_in_x_mode 142 110 -32
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(add/remove: 1/0 grow/shrink: 1/1 up/down: 162/-32) Total: 130 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Was printing initial "+" prefix for the assignment, that printing
"+ cmd"
then printing the expanded " v=VAL" string.
Delay printing of "+" prefix for the assignment to after expansion.
function old new delta
run_pipe 1883 1902 +19
builtin_eval 127 133 +6
expand_vars_to_list 1103 1106 +3
dump_cmd_in_x_mode 144 142 -2
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(add/remove: 0/0 grow/shrink: 3/1 up/down: 28/-2) Total: 26 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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The n > 0 check to prevent access to the last byte of non-existing argv[-1]
wasn't enough. Switched to making sure there are initialized (zero) bytes there.
A predictable testcase is rather hard to construct, unfortunately,
contents of memory depends on allocator behavior and whatnot.
function old new delta
o_save_ptr_helper 119 137 +18
expand_on_ifs 345 339 -6
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(add/remove: 0/0 grow/shrink: 1/1 up/down: 18/-6) Total: 12 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
dump_cmd_in_x_mode 126 144 +18
run_pipe 1873 1883 +10
builtin_eval 119 127 +8
expand_vars_to_list 1100 1103 +3
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(add/remove: 0/0 grow/shrink: 4/0 up/down: 39/0) Total: 39 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
save_fd_on_redirect 200 208 +8
run_pipe 1870 1873 +3
setup_redirects 321 322 +1
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(add/remove: 0/0 grow/shrink: 3/0 up/down: 12/0) Total: 12 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This necessitates switch from libc FILE api to a simple
homegrown replacement.
The change which fixes the bug here is the deleting of
restore_redirected_FILEs();
line. It was prematurely moving (restoring) script fd#3.
The fix is: we don't even _want_ to restore scrit fds,
we are perfectly fine with them being moved.
The only reason we tried to restore them is that FILE api
did not allow moving of FILE->fd.
function old new delta
refill_HFILE_and_getc - 93 +93
hfopen - 90 +90
hfclose - 66 +66
pseudo_exec_argv 591 597 +6
hush_main 1089 1095 +6
builtin_source 209 214 +5
save_fd_on_redirect 197 200 +3
setup_redirects 320 321 +1
fgetc_interactive 235 236 +1
i_peek_and_eat_bkslash_nl 99 97 -2
expand_vars_to_list 1103 1100 -3
restore_redirects 99 52 -47
fclose_and_forget 57 - -57
remember_FILE 63 - -63
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 6/3 up/down: 271/-172) Total: 99 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
fetch_heredocs 479 527 +48
(ash fails this test)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
fetch_heredocs - 479 +479
parse_and_run_stream 146 148 +2
parse_stream 2787 2296 -491
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(add/remove: 1/0 grow/shrink: 1/1 up/down: 481/-491) Total: -10 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
parse_stream 2759 2787 +28
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
parse_stream 2748 2759 +11
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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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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o_free() made o_string NULL-initialized,
o_free_unsafe() did not bother reinitializing (expected caller to not need it).
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This wasn't an ash bug in dollar_altvalue9, it was hush bug (and bash!)
function old new delta
expand_one_var 2236 2254 +18
expand_vars_to_list 1097 1103 +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 24/0) Total: 24 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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ash might be a bit buggy, need to investigate dollar_altvalue9 test
function old new delta
expand_one_var 1639 2236 +597
expand_variables 112 128 +16
expand_vars_to_list 1117 1097 -20
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(add/remove: 0/0 grow/shrink: 2/1 up/down: 613/-20) Total: 593 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
expand_variables 112 115 +3
expand_vars_to_list 1117 1108 -9
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(add/remove: 0/0 grow/shrink: 1/1 up/down: 3/-9) Total: -6 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
o_addstr - 26 +26
expand_vars_to_list 1112 1117 +5
encode_then_expand_vararg 398 382 -16
parse_dollar 779 762 -17
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(add/remove: 1/0 grow/shrink: 1/2 up/down: 31/-33) Total: -2 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This simplifies function parameter passing.
function old new delta
expand_one_var 1643 1639 -4
append_str_maybe_ifs_split 64 52 -12
expand_vars_to_list 1125 1112 -13
expand_on_ifs 361 345 -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-45) Total: -45 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This is necessary since expand_one_var() for ${var:+ARG} must create more than one
output word, and thus can't simply return a char*.
function old new delta
expand_one_var 1610 1643 +33
expand_vars_to_list 1139 1125 -14
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(add/remove: 0/0 grow/shrink: 1/1 up/down: 33/-14) Total: 19 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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