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authorMike Frysinger <vapier@gentoo.org>2012-04-03 03:37:26 +0000
committerMike Frysinger <vapier@gentoo.org>2012-04-03 03:37:26 +0000
commit23916fffce6bac40347fc5a061c9e073e462f943 (patch)
tree85aeab61cb42c3ca488bac57d9500e93475fbf29 /elfcpp
parentb1c0804b2ea1532cab67ae4d7b288b8e013615c5 (diff)
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ld: optimize vfinfo output slightly
ld atm ends up calling the write() syscall on every char when displaying an error message. For example: $ echo 'main(){foo();}' | strace -f -ewrite gcc -x c -o /dev/null - ... [pid 13035] write(2, ":", 1) = 1 [pid 13035] write(2, " ", 1) = 1 [pid 13035] write(2, "I", 1) = 1 [pid 13035] write(2, "n", 1) = 1 [pid 13035] write(2, " ", 1) = 1 [pid 13035] write(2, "f", 1) = 1 [pid 13035] write(2, "u", 1) = 1 [pid 13035] write(2, "n", 1) = 1 [pid 13035] write(2, "c", 1) = 1 [pid 13035] write(2, "t", 1) = 1 [pid 13035] write(2, "i", 1) = 1 [pid 13035] write(2, "o", 1) = 1 [pid 13035] write(2, "n", 1) = 1 [pid 13035] write(2, " ", 1) = 1 [pid 13035] write(2, "`", 1) = 1 ... That's just to write ": In function `main':". A slight optimization in the vfinfo() func gives a much more reasonable syscall footprint: ... write(2, ": In function `", 15) = 15 ... Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'elfcpp')
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