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https://github.com/torvalds/linux
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7b99f75942
v1.25 of pahole supports filtering out functions with multiple inconsistent function prototypes or optimized-out parameters from the BTF representation. These present problems because there is no additional info in BTF saying which inconsistent prototype matches which function instance to help guide attachment, and functions with optimized-out parameters can lead to incorrect assumptions about register contents. So for now, filter out such functions while adding BTF representations for functions that have "."-suffixes (foo.isra.0) but not optimized-out parameters. This patch assumes that below linked changes land in pahole for v1.25. Issues with pahole filtering being too aggressive in removing functions appear to be resolved now, but CI and further testing will confirm. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20230510130241.1696561-1-alan.maguire@oracle.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
31 lines
855 B
Bash
Executable File
31 lines
855 B
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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extra_paholeopt=
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if ! [ -x "$(command -v ${PAHOLE})" ]; then
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exit 0
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fi
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pahole_ver=$($(dirname $0)/pahole-version.sh ${PAHOLE})
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if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
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# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
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extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
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fi
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if [ "${pahole_ver}" -ge "121" ]; then
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extra_paholeopt="${extra_paholeopt} --btf_gen_floats"
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fi
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if [ "${pahole_ver}" -ge "122" ]; then
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extra_paholeopt="${extra_paholeopt} -j"
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fi
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if [ "${pahole_ver}" -ge "124" ]; then
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# see PAHOLE_HAS_LANG_EXCLUDE
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extra_paholeopt="${extra_paholeopt} --lang_exclude=rust"
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fi
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if [ "${pahole_ver}" -ge "125" ]; then
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extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_inconsistent_proto --btf_gen_optimized"
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fi
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echo ${extra_paholeopt}
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