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2021-06-30awk: rewrite "print" logic a bit to make it clearerDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-30awk: allow empty fuinctions with no arguments, disallow function redefinitionsDenys Vlasenko
function old new delta .rodata 103681 103700 +19 parse_program 303 307 +4 evaluate 3145 3141 -4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 23/-4) Total: 19 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-30awk: replace incorrect use of union in undefined function check (no code ↵Denys Vlasenko
changes) ...which reveals that it's buggy: it thinks "func f(){}" is an undefined function! Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-30awk: remove custom pool allocator for temporary awk variablesDenys Vlasenko
It seems to be designed to reduce overhead of malloc's auxiliary data, by allocating at least 64 variables as a block. With "struct var" being about 20-32 bytes long (32/64 bits), malloc overhead for one temporary indeed is high, ~33% more memory used than needed. function old new delta evaluate 3137 3145 +8 modprobe_main 798 803 +5 exec_builtin 1414 1419 +5 awk_printf 476 481 +5 as_regex 132 137 +5 EMSG_INTERNAL_ERROR 15 - -15 nvfree 169 116 -53 nvalloc 145 - -145 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 5/1 up/down: 28/-213) Total: -185 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: assorted optimizationsDenys Vlasenko
hash_find(): do not caclculate hash twice. Do not divide - can use cheap multiply-by-8 shift. nextword(): do not repeatedly increment in-memory value, do it in register, then store final result. hashwalk_init(): do not strlen() twice. function old new delta hash_search3 - 49 +49 hash_find 259 281 +22 nextword 19 16 -3 evaluate 3141 3137 -4 hash_search 54 28 -26 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/3 up/down: 71/-33) Total: 38 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: free unused parsing structures after parse is doneDenys Vlasenko
function old new delta hash_clear - 90 +90 awk_main 827 849 +22 clear_array 90 - -90 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 1/0 up/down: 112/-90) Total: 22 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: document which hashes are used at what state (parse/execute)Denys Vlasenko
We can free them after they are no longer needed. (Currently, being a NOEXEC applet is much larger waste of memory for the case of long-running awk script). function old new delta awk_main 831 827 -4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: fix parsing of expressions such as "v (a)"Denys Vlasenko
function old new delta next_token 812 825 +13 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: deindent a block, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: code shrinkDenys Vlasenko
function old new delta parse_expr 948 945 -3 chain_expr 65 62 -3 chain_group 655 649 -6 parse_program 310 303 -7 rollback_token 10 - -10 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/4 up/down: 0/-29) Total: -29 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: get rid of "move name one char back" trick in next_token()Denys Vlasenko
function old new delta next_token 791 812 +21 awk_main 886 831 -55 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 21/-55) Total: -34 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: when parsing TC_FUNCTION token, eat its opening '('Denys Vlasenko
...like we do for array references. function old new delta parse_expr 938 948 +10 next_token 788 791 +3 parse_program 313 310 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 13/-3) Total: 10 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: g_buf[] does not need a separate allocationDenys Vlasenko
function old new delta exec_builtin 1400 1414 +14 evaluate 3132 3141 +9 getvar_s 121 125 +4 awk_main 902 886 -16 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/1 up/down: 27/-16) Total: 11 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: simplify parsing of function declarationDenys Vlasenko
function old new delta parse_program 328 313 -15 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: rename TC_SEQSTART/END to L/RPAREN, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: deindent code block, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: use TS_foo for combined token classes. No code changesDenys Vlasenko
Confusion with "simple" classes was the cause of a bug fixed by previous commit Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: make ltclass ("last token class") local to next_token()Denys Vlasenko
function old new delta next_token 784 790 +6 next_input_file 219 216 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 6/-3) Total: 3 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-29awk: remove redundant checkDenys Vlasenko
function old new delta next_token 785 784 -1 parse_program 337 328 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-10) Total: -10 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-25awk: move locals deeper into scopes where they are used, no logic changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-25awk: more efficient -f FILE, document what "some trick in next_token" isDenys Vlasenko
function old new delta awk_main 890 898 +8 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-20qwk: make code clearer, no actual code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-18awk: after preinc/dec, only allow variable, field ref, array ref, or another ↵Denys Vlasenko
preinc/dec Accepting nonsense like "--4", and even "-- -4" is confusing. function old new delta parse_expr 917 938 +21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-16awk: fix use-after-free in "$BIGNUM1 $BIGGERNUM2" concat opDenys Vlasenko
Second reference to a field reallocs/moves Fields[] array, but first ref still tries to use the element where it was before move. function old new delta fsrealloc 94 106 +12 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-02-02awk: allow printf('%c') to output NUL, closes 13486Ron Yorston
Treat the output of printf as binary rather than a null-terminated string so that NUL characters can be output. This is considered to be a GNU extension, though it's also available in mawk and FreeBSD's awk. function old new delta evaluate 3487 3504 +17 awk_printf 504 519 +15 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 32/0) Total: 32 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-12-02awk: FS regex matches only non-empty separators (gawk compat)Denys Vlasenko
function old new delta awk_split 484 553 +69 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-30decrease paddign: gcc-9.3.1 slaps 32-byte alignment on arrays willy-nillyDenys Vlasenko
text data bss dec hex filename 1021988 559 5052 1027599 fae0f busybox_old 1021236 559 5052 1026847 fab1f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-16awk: fix dodgy multi-char separators splitting logicDenys Vlasenko
function old new delta awk_split 521 484 -37 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09awk: disallow "str"++, closes bug 12981Denys Vlasenko
function old new delta parse_expr 887 896 +9 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-02awk: fix more "length" cases, closes 12486Denys Vlasenko
function old new delta next_token 808 831 +23 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02libbb: reduce the overhead of single parameter bb_error_msg() callsJames Byrne
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>
2019-01-21awk: Fix overly permissive func arg list parsingBrian Foley
It allows things like 'func f(a b)' and 'func f(a,)' which GNU awk forbids. function old new delta parse_program 327 367 +40 chain_expr 40 67 +27 parse_expr 891 915 +24 EMSG_TOO_FEW_ARGS 30 18 -12 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/1 up/down: 91/-12) Total: 79 bytes Signed-off-by: Brian Foley <bpfoley@google.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-21awk: Syntax error if delete isn't given an arg.Brian Foley
Unlike exit and return, delete strictly requires an arg, and derefs a null pointer if executed without one. Signed-off-by: Brian Foley <bpfoley@google.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-21awk: Guard pointer chasing when parsing ternary expressions.Brian Foley
Avoids an uninit pointer deref for some malformed ternary exprs. Add a test that would crash in busybox before this fix. Signed-off-by: Brian Foley <bpfoley@google.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-28config: update size informationDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-28awk: abort if NF set to negative valueDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-23awk: do not allow $(-1)Denys Vlasenko
function old new delta EMSG_NEGATIVE_FIELD - 25 +25 evaluate 3390 3403 +13 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 38/0) Total: 38 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-07awk: code shrinkDenys Vlasenko
function old new delta awk_main 955 948 -7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-07awk: fix 'delete array[var--]' decrementing var twiceDenys Vlasenko
function old new delta evaluate 3395 3390 -5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-18regularize format of source file headers, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-16awk: stop on first non-option, closes 9861Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02do not use `a' quoting style in commentsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27config: trim/improve item names and help texts, take 2Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21config: deindent all help textsDenys Vlasenko
Those two spaces after tab have no effect, and always a nuisance when editing. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-20libarchive: FEATURE_LZMA_FAST should be visible if FEATURE_SEAMLESS_LZMADenys Vlasenko
While at it, tweak some config help texts. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18Update menuconfig items with approximate applet sizesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-24awk: fix segfault on for loop syntax errorBrian Foley
Parsing "for()" segfaults as awk fails to find loop iteration expressions. Signed-off-by: Brian Foley <bpfoley@google.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-07-06getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LISTDenys Vlasenko
In many cases, this aqllows to drop use of opt_complementary. Approximately -400 bytes: function old new delta getopt32 1423 1502 +79 opt_string 17 18 +1 OPT_STR 24 25 +1 uniq_main 416 406 -10 timeout_main 279 269 -10 sulogin_main 270 260 -10 readprofile_main 1825 1815 -10 ps_main 543 533 -10 pidof_main 245 235 -10 pgrep_main 611 601 -10 od_main 2600 2590 -10 mkfs_minix_main 2684 2674 -10 mkfs_ext2_main 2603 2593 -10 microcom_main 712 702 -10 makemime_main 315 305 -10 ionice_main 282 272 -10 inetd_main 2074 2064 -10 ifplugd_main 1144 1134 -10 halt_main 353 343 -10 getopt_main 636 626 -10 fdisk_main 2854 2844 -10 env_main 206 196 -10 dmesg_main 319 309 -10 conspy_main 1214 1204 -10 awk_main 981 971 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220) Total: -139 bytes text data bss dec hex filename 919373 906 14060 934339 e41c3 busybox_old 918969 906 14060 933935 e402f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-10-02awk: support "length" form of "length()". Closes 8371Denys Vlasenko
function old new delta parse_expr 805 848 +43 tokenlist 447 448 +1 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-07-13Removes stray empty line from codeManinder Singh
This patch removes stray empty line from busybox code reported by script find_stray_empty_lines Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.1 at 2024-10-22 21:51:53 +0000