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27 lines
885 B
27 lines
885 B
#!/bin/bash |
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# SPDX-License-Identifier: GPL-2.0 |
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set -e |
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set -o pipefail |
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# To debug, uncomment the following line |
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# set -x |
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# -mprofile-kernel is only supported on 64le, so this should not be invoked |
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# for other targets. Therefore we can pass in -m64 and -mlittle-endian |
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# explicitly, to take care of toolchains defaulting to other targets. |
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# Test whether the compile option -mprofile-kernel exists and generates |
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# profiling code (ie. a call to _mcount()). |
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echo "int func() { return 0; }" | \ |
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$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ |
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2> /dev/null | grep -q "_mcount" |
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# Test whether the notrace attribute correctly suppresses calls to _mcount(). |
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echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \ |
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$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ |
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2> /dev/null | grep -q "_mcount" && \ |
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exit 1 |
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exit 0
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