tree 844cabbae20e511912261ca2ad3ece33852e5bd3
parent 1234471e2d11e4ee47f6de452dd8b8aeb09b45de
author Namhyung Kim <namhyung@kernel.org> 1350999890 +0900
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1351600376 -0200

perf tools: Fix strbuf_addf() when the buffer needs to grow

This was found during chasing down the header output regression.  The
strbuf_addf() was checking buffer length with a result of vscnprintf()
which cannot be greater than that of strbuf_avail().

Since numa topology and pmu mapping info in header were converted to use
strbuf, it sometimes caused uninteresting behaviors with the broken
strbuf.

Fix it by using vsnprintf() which returns desired output string length
regardless of the available buffer size and grow the buffer if needed.

Reported-by: Andrew Jones <drjones@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andrew Jones <drjones@redhat.com>
Link: http://lkml.kernel.org/r/1350999890-6920-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>