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a1805f7bb9
freebsd/lib/libc/stdio
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David Schultz a1805f7bb9 When f[w]printf() is called on an unbuffered file like stdout, it 
sets up a fake buffered FILE and then effectively calls itself
recursively. Unfortunately, gcc doesn't know how to do tail call
elimination in this case, and actually makes things worse by
inlining __sbprintf(). This means that f[w]printf() to stderr was
allocating about 5k of stack on 64-bit platforms, much of which was
never used.

I've reorganized things to eliminate the waste. In addition to saving
some stack space, this improves performance in my tests by anywhere
from 5% to 17% (depending on the test) when -fstack-protector is
enabled. I found no statistically significant performance difference
when stack protection is turned off. (The tests redirected stderr to
/dev/null.)
2009-01-17 18:57:12 +00:00
..
_flock_stub.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
asprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
clrerr.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
fclose.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fclose.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fcloseall.c Oops, correct the weak reference (s/fclose/fcloseall). 2006-04-22 16:47:59 +00:00
fdopen.c Remove useless call to getdtablesize(2) in fdopen(3) and its useless 2008-05-10 18:39:20 +00:00
feof.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
ferror.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ferror.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
fflush.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fflush.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetc.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetln.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetln.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetpos.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgets.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgets.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetwc.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fgetwln.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetwln.c Fix an off-by-one bug that caused the first character of the buffer to 2004-08-06 17:00:09 +00:00
fgetws.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fgetws.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fileno.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
findfp.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
flags.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
floatio.h Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
flockfile.3
fopen.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fopen.c Fix a leak in the recent fixes for file descriptors > SHRT_MAX. In the 2008-04-22 17:03:32 +00:00
fprintf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fpurge.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fputc.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fputs.3 Grammer correction from: emaste 2007-04-19 14:01:04 +00:00
fputs.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fputwc.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fputws.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fputws.c Introduce a local variable and use it instead of passed in parameter 2009-01-15 18:53:52 +00:00
fread.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fread.c Fix fread() to return a correct value on platforms where sizeof(int) != 2008-12-01 14:33:34 +00:00
freopen.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fscanf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fseek.3 Add rewind() to the list of functions which may fail and set errno 2007-06-18 02:13:04 +00:00
fseek.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fsetpos.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ftell.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
funopen.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
funopen.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fvwrite.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fvwrite.h Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fwalk.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fwide.3
fwide.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
fwprintf.c
fwrite.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fwscanf.c
getc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getc.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
getchar.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
gets.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getw.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getwc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getwc.c Provide trivial macro implementations of getwc(), getwchar(), putwc() and 2004-05-25 10:42:52 +00:00
getwchar.c Provide trivial macro implementations of getwc(), getwchar(), putwc() and 2004-05-25 10:42:52 +00:00
glue.h Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
local.h Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
makebuf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
Makefile.inc Reduce the level of duplication between vfprintf() and vfwprintf() 2008-06-29 21:52:40 +00:00
mktemp.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
mktemp.c Fix a few bugs with the _gettemp() routine which implements mkstemp(), 2008-07-28 21:18:59 +00:00
perror.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
printf-pos.c Fix a bogon in the previous commit and add some missing error checks. 2008-06-29 23:46:06 +00:00
printf.3 Updates for changes in the way printf() handles hex floating point 2008-04-12 03:11:56 +00:00
printf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
printfcommon.h Simplify printf's inlined output buffering routines. On amd64, this 2009-01-17 05:38:14 +00:00
printflocal.h Correctly handle malloc() failure. While here, reduce the code size a 2008-06-29 22:54:26 +00:00
putc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
putc.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
putchar.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00
puts.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
putw.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
putwc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
putwc.c Provide trivial macro implementations of getwc(), getwchar(), putwc() and 2004-05-25 10:42:52 +00:00
putwchar.c Provide trivial macro implementations of getwc(), getwchar(), putwc() and 2004-05-25 10:42:52 +00:00
refill.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
remove.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
remove.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
rewind.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
rget.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
scanf.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
scanf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setbuf.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setbuf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setbuffer.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setvbuf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
snprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
sprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
sscanf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
stdio.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
stdio.c Retire the __fgetcookie(), __fgetpendout(), and __fsetfileno() accessors 2008-05-05 16:14:02 +00:00
swprintf.c
swscanf.c
Symbol.map Retire the __fgetcookie(), __fgetpendout(), and __fsetfileno() accessors 2008-05-05 16:14:02 +00:00
tempnam.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
tmpfile.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
tmpnam.3 o Add ENVIRONMENT section and mention there that TMPDIR is ignored 2007-03-16 21:46:24 +00:00
tmpnam.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ungetc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ungetc.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
ungetwc.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ungetwc.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vasprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vfprintf.c When f[w]printf() is called on an unbuffered file like stdout, it 2009-01-17 18:57:12 +00:00
vfscanf.c Remove some test instrumentation. (The Symbol.map changes broke it anyway.) 2007-12-09 21:00:12 +00:00
vfwprintf.c When f[w]printf() is called on an unbuffered file like stdout, it 2009-01-17 18:57:12 +00:00
vfwscanf.c Remove some test instrumentation. (The Symbol.map changes broke it anyway.) 2007-12-09 21:00:12 +00:00
vprintf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
vscanf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
vsnprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vsprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vsscanf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vswprintf.c Next stage of stdio cleanup: Retire __sFILEX and merge the fields back into 2008-04-17 22:17:54 +00:00
vswscanf.c Introduce a local variable and use it instead of passed in parameter 2009-01-15 18:53:52 +00:00
vwprintf.c
vwscanf.c
wbuf.c Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
wprintf.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
wprintf.c
wscanf.3 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
wscanf.c
wsetup.c Set the error indicator on an attempt to write to a read-only stream. 2009-01-08 06:38:06 +00:00
xprintf_errno.c Make the %V{is} extension handle a NULL pointer like %s does: output "(null)" 2006-01-25 12:45:24 +00:00
xprintf_float.c Add an extensible version of our *printf(3) implementation to libc 2005-12-16 18:56:39 +00:00
xprintf_hexdump.c Add an extensible version of our *printf(3) implementation to libc 2005-12-16 18:56:39 +00:00
xprintf_int.c Explicitely use a "signed char" instead of a "char", for those archs where 2005-12-22 14:23:54 +00:00
xprintf_quote.c Fix the %Q printf extension to behave as expected 2006-03-02 08:53:45 +00:00
xprintf_str.c Add an extensible version of our *printf(3) implementation to libc 2005-12-16 18:56:39 +00:00
xprintf_time.c Remove spurious "union arg" from printf.h 2006-02-04 14:35:01 +00:00
xprintf_vis.c Make the %V{is} extension handle a NULL pointer like %s does: output "(null)" 2006-01-25 12:45:24 +00:00
xprintf.c Expose FILE's internals to the world again in all their glory. Restore 2008-05-05 16:03:52 +00:00