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perf tools: Check maps for bpf programs
As reported by Jiri Olsa in:
"[BUG] perf: intel_pt won't display kernel function"
https://lore.kernel.org/lkml/20190403143738.GB32001@krava
Recent changes to support PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT
broke --kallsyms option. This is because it broke test __map__is_kmodule.
This patch fixes this by adding check for bpf program, so that these maps
are not mistaken as kernel modules.
Signed-off-by: Song Liu <songliubraving@fb.com>
Reported-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lkml.kernel.org/r/20190416160127.30203-8-jolsa@kernel.org
Fixes: 76193a9452
("perf, bpf: Introduce PERF_RECORD_KSYMBOL")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
aa52660231
commit
a93e0b2365
2 changed files with 19 additions and 1 deletions
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@ -261,6 +261,22 @@ bool __map__is_extra_kernel_map(const struct map *map)
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return kmap && kmap->name[0];
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}
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bool __map__is_bpf_prog(const struct map *map)
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{
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const char *name;
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if (map->dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
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return true;
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/*
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* If PERF_RECORD_BPF_EVENT is not included, the dso will not have
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* type of DSO_BINARY_TYPE__BPF_PROG_INFO. In such cases, we can
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* guess the type based on name.
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*/
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name = map->dso->short_name;
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return name && (strstr(name, "bpf_prog_") == name);
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}
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bool map__has_symbols(const struct map *map)
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{
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return dso__has_symbols(map->dso);
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@ -159,10 +159,12 @@ int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
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bool __map__is_kernel(const struct map *map);
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bool __map__is_extra_kernel_map(const struct map *map);
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bool __map__is_bpf_prog(const struct map *map);
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static inline bool __map__is_kmodule(const struct map *map)
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{
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return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map);
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return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map) &&
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!__map__is_bpf_prog(map);
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}
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bool map__has_symbols(const struct map *map);
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