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2026-06-22perf bpf: Fix up build failure due to change of btf_vlen() return typeMark Brown1-1/+1
Fix: util/btf.c: In function '__btf_type__find_member_by_name': util/btf.c:19:43: error: comparison of integer expressions of different signedness: 'int' and '__u32' {aka 'unsigned int'} [-Werror=sign-compare] 19 | for (i = 0, m = btf_members(t); i < btf_vlen(t); i++, m++) { | ^ builtin-trace.c: In function 'syscall_arg__strtoul_btf_enum': builtin-trace.c:967:27: error: comparison of integer expressions of different signedness: 'int' and '__u32' {aka 'unsigned int'} [-Werror=sign-compare] 967 | for (int i = 0; i < btf_vlen(bt); ++i, ++be) { | ^ by making the variable the same type as the function. Committer note: Add an extra hunk from Alan Maguire, fixing btf_enum_scnprintf(). Reviewed-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2024-12-09perf btf: Make the sigtrap test helper to find a member by name widely availableArnaldo Carvalho de Melo1-0/+27
By introducing a tools/perf/util/btf.c to collect utilities not yet available via libbpf, the first being a way to find a member by name once we get the type_id for the struct. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>