This is the same as commit 4d86cae4f0 ("ci: disable GCC's
-Wstringop-truncation noisy error"), but for Ubuntu. Without this,
there are false positives in bpf_object__new() on Ubuntu 20.04:
this function calls strncpy() with the correct bounds, but still
triggers the warning.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
It requires v5.9+ kernel when the test code is built with a newer
toolchain. The support was added by commit b33164f2bd1c ("bpf:
Iterate through all PT_NOTE sections when looking for build id").
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
The logic follows that of BTF_KIND_INT most of the time. Sanitization
replaces BTF_KIND_FLOATs with equally-sized empty BTF_KIND_STRUCTs on
older kernels, for example, the following:
[4] FLOAT 'float' size=4
becomes the following:
[4] STRUCT '(anon)' size=4 vlen=0
With dwarves patch [1] and this patch, the older kernels, which were
failing with the floating-point-related errors, will now start working
correctly.
[1] https://github.com/iii-i/dwarves/commit/btf-kind-float-v2
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210226202256.116518-4-iii@linux.ibm.com
Ilya Leoshkevich