1*4882a593Smuzhiyun#!/bin/bash 2*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 3*4882a593Smuzhiyun 4*4882a593Smuzhiyunset -e 5*4882a593Smuzhiyunset -o pipefail 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun# To debug, uncomment the following line 8*4882a593Smuzhiyun# set -x 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun# -mprofile-kernel is only supported on 64le, so this should not be invoked 11*4882a593Smuzhiyun# for other targets. Therefore we can pass in -m64 and -mlittle-endian 12*4882a593Smuzhiyun# explicitly, to take care of toolchains defaulting to other targets. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun# Test whether the compile option -mprofile-kernel exists and generates 15*4882a593Smuzhiyun# profiling code (ie. a call to _mcount()). 16*4882a593Smuzhiyunecho "int func() { return 0; }" | \ 17*4882a593Smuzhiyun $* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ 18*4882a593Smuzhiyun 2> /dev/null | grep -q "_mcount" 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun# Test whether the notrace attribute correctly suppresses calls to _mcount(). 21*4882a593Smuzhiyun 22*4882a593Smuzhiyunecho -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \ 23*4882a593Smuzhiyun $* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ 24*4882a593Smuzhiyun 2> /dev/null | grep -q "_mcount" && \ 25*4882a593Smuzhiyun exit 1 26*4882a593Smuzhiyun 27*4882a593Smuzhiyunexit 0 28