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libbb: make bb_common_bufsiz1 1 kbyte, add capability to use bss tail for it

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The config item is FEATURE_USE_BSS_TAIL. When it is off (default):

function                                             old     new   delta
read_config                                          210     228     +18
doCommands                                          2279    2294     +15
ipneigh_list_or_flush                                763     772      +9
ipaddr_list_or_flush                                1256    1261      +5
display_process_list                                1301    1306      +5
conspy_main                                         1378    1383      +5
do_lzo_compress                                      352     355      +3
do_lzo_decompress                                    565     567      +2
push                                                  46      44      -2
inetd_main                                          2136    2134      -2
uevent_main                                          421     418      -3
addLines                                              97      92      -5
bb_common_bufsiz1                                   8193    1024   -7169
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 8/5 up/down: 62/-7181)        Total: -7119 bytes
   text	   data	    bss	    dec	    hex	filename
 829850	   4086	   9080	 843016	  cdd08	busybox_old
 829901	   4086	   1904	 835891	  cc133	busybox_unstripped

FEATURE_USE_BSS_TAIL=y:

read_config                                          210     228     +18
doCommands                                          2279    2294     +15
ipneigh_list_or_flush                                763     772      +9
ipaddr_list_or_flush                                1256    1261      +5
display_process_list                                1301    1306      +5
conspy_main                                         1378    1383      +5
do_lzo_compress                                      352     355      +3
do_lzo_decompress                                    565     567      +2
inetd_main                                          2136    2134      -2
bb_common_bufsiz1                                   8193       -   -8193
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 8/1 up/down: 62/-8195)        Total: -8133 bytes
   text	   data	    bss	    dec	    hex	filename
 829850	   4086	   9080	 843016	  cdd08	busybox_old
 829911	   4086	    880	 834877	  cbd3d	busybox_unstripped

FIXME: setup_common_bufsiz() calls are missing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2016-04-21 16:26:30 +02:00
parent 5598bdf0d3
commit e6a2f4cc5a
91 changed files with 414 additions and 131 deletions
Download patch file Download diff file Expand all files Collapse all files

6
sysklogd/klogd.c
View file

@ -58,6 +58,7 @@
//usage: "\n -n Run in foreground"
#include "libbb.h"
#include "common_bufsiz.h"
#include <syslog.h>
@ -145,9 +146,10 @@ static void klogd_close(void)
#endif
#define log_buffer bb_common_bufsiz1
#define log_buffer bb_common_bufsiz1
#define sizeof_log_buffer COMMON_BUFSIZE
enum {
KLOGD_LOGBUF_SIZE = sizeof(log_buffer),
KLOGD_LOGBUF_SIZE = sizeof_log_buffer,
OPT_LEVEL = (1 << 0),
OPT_FOREGROUND = (1 << 1),
};

3
sysklogd/logread.c
View file

@ -42,6 +42,7 @@
//usage: "\n -F Same as -f, but dump buffer first"
#include "libbb.h"
#include "common_bufsiz.h"
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
@ -67,7 +68,7 @@ struct globals {
struct sembuf SMrdn[2]; // {1, 0}, {0, +1, SEM_UNDO}
struct shbuf_ds *shbuf;
} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
#define G (*(struct globals*)bb_common_bufsiz1)
#define SMrup (G.SMrup)
#define SMrdn (G.SMrdn)
#define shbuf (G.shbuf)

1
sysklogd/syslogd_and_logger.c
View file

@ -8,6 +8,7 @@
*/
#include "libbb.h"
#include "common_bufsiz.h"
#define SYSLOG_NAMES
#define SYSLOG_NAMES_CONST
#include <syslog.h>