On Thu, 2016-02-11 at 09:42 +0100, Torsten Duwe wrote:

On Thu, Feb 11, 2016 at 06:48:17PM +1100, Balbir Singh wrote:

quoted

On Wed, 2016-02-10 at 17:25 +0100, Torsten Duwe wrote:

quoted

+
+echo "int func() { return 0; }" | \
+    $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
+    sed -n -e '/func:/,/bl _mcount/p' | grep -q TOC
+
+leaf_toc_result=$?
+

leaf_toc_result failed for me with gcc 5. I'll try and grab gcc-6
and give the patches a spin

Don't bother. _All_ gccs are broken in that respect currently.
AFAIK Anton is working on this. You have to fake the test, like
static int a; return a++;

Gcc fails to set the TOC for profiled "leaf" functions, where it
thinks no global/static symbols are referenced.

Thanks for the quick answer

BTW, do we expect static/non global functions to be called from
patched contexts? I understand that not supporting it will
complicate a patch.

Balbir Singh