44 lines
1.2 KiB
Bash
Executable File
44 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-only
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# Copyright © 2019 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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# Use pahole to produce output from BTF and from DWARF, then do a diff
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# Use --flat_arrays with DWARF as BTF, like CTF, flattens arrays.
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# Use --show_private_classes as BTF shows all structs, while pahole knows
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# if some struct is defined only inside another struct/class or in a function,
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# this information is not available when loading from BTF.
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if [ $# -eq 0 ] ; then
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echo "Usage: btfdiff <filename_with_DWARF_and_maybe_BTF_info> [<filename_with_BTF_info>]"
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exit 1
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fi
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dwarf_input=$1
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btf_input=$dwarf_input
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if [ $# -eq 2 ] ; then
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btf_input=$2
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fi
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btf_output=$(mktemp /tmp/btfdiff.btf.XXXXXX)
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dwarf_output=$(mktemp /tmp/btfdiff.dwarf.XXXXXX)
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pahole_bin=${PAHOLE-"pahole"}
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${pahole_bin} -F dwarf \
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--flat_arrays \
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--sort \
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--jobs \
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--suppress_aligned_attribute \
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--suppress_force_paddings \
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--suppress_packed \
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--show_private_classes $dwarf_input > $dwarf_output
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${pahole_bin} -F btf \
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--sort \
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--suppress_aligned_attribute \
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--suppress_packed \
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$btf_input > $btf_output
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diff -up $dwarf_output $btf_output
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rm -f $btf_output $dwarf_output
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exit 0
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