bpftool: Cast pointers for shadow types explicitly.

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According to a report, skeletons fail to assign shadow pointers when being
compiled with C++ programs. Unlike C doing implicit casting for void
pointers, C++ requires an explicit casting.

To support C++, we do explicit casting for each shadow pointer.

Also add struct_ops_module.skel.h to test_cpp to validate C++
compilation as part of BPF selftests.

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20240312013726.1780720-1-thinker.li@gmail.com

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Kui-Feng Lee 2024-03-11 18:37:26 -07:00 • committed by Andrii Nakryiko

parent 9187210eee

commit c2a0257c1e

2 changed files with 7 additions and 1 deletions

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3

tools/bpf/bpftool/gen.c

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5

tools/testing/selftests/bpf/test_cpp.cpp

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