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2024-08-21perf bpf: Remove redundant check that map is NULLYang Ruibin
The check that map is NULL is already done in the bpf_map__fd(map) and returns an errno, which does not run further checks. In addition, even if the check for map is run, the return is a pointer, which is not consistent with the err_number returned by bpf_map__fd(map). Signed-off-by: Yang Ruibin <11162571@vivo.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: opensource.kernel@vivo.com Link: https://lore.kernel.org/r/20240821101500.4568-1-11162571@vivo.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-01-12perf: Stop using bpf_map__def() APIChristy Lee
libbpf bpf_map__def() API is being deprecated, replace perf's usage with the appropriate getters and setters. Signed-off-by: Christy Lee <christylee@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220108004218.355761-4-christylee@fb.com
2019-02-19perf bpf: Add bpf_map dumperArnaldo Carvalho de Melo
At some point I'll suggest moving this to libbpf, for now I'll experiment with ways to dump BPF maps set by events in 'perf trace', starting with a very basic dumper for the current very limited needs of the augmented_raw_syscalls code: dumping booleans. Having functions that apply to the map keys and values and do table lookup in things like syscall id to string tables should come next. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Yonghong Song <yhs@fb.com> Link: https://lkml.kernel.org/n/tip-lz14w0esqyt1333aon05jpwc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>