After this patch perf hooks can retrive pid of perf itself by calling getpid. It is important for excluding event from perf.
Signed-off-by: Wang Nan <wangn...@huawei.com> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: Alexei Starovoitov <a...@fb.com> Cc: He Kuang <heku...@huawei.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Zefan Li <lize...@huawei.com> Cc: pi3or...@163.com --- tools/perf/util/c++/bpf-helper-str.c | 1 + tools/perf/util/c++/clang.cpp | 1 + 2 files changed, 2 insertions(+) diff --git a/tools/perf/util/c++/bpf-helper-str.c b/tools/perf/util/c++/bpf-helper-str.c index 69aca3c..eedee89 100644 --- a/tools/perf/util/c++/bpf-helper-str.c +++ b/tools/perf/util/c++/bpf-helper-str.c @@ -13,6 +13,7 @@ const char clang_builtin_bpf_helper_str[] = "extern void test__clang_callback(int);\n" "extern int printf(const char *, ...);\n" "extern int puts(const char *);\n" +"extern int getpid(void);\n" "extern int jit_helper__map_update_elem(void *, void *, void *, void *, unsigned long);\n" "extern int jit_helper__map_lookup_elem(void *, void *, void *, void *);\n" "extern int jit_helper__map_get_next_key(void *, void *, void *, void *);\n" diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp index db31fb2..d6af336 100644 --- a/tools/perf/util/c++/clang.cpp +++ b/tools/perf/util/c++/clang.cpp @@ -236,6 +236,7 @@ static std::map<const std::string, const void *> exported_funcs = EXPORT(test__clang_callback), EXPORT(printf), EXPORT(puts), + EXPORT(getpid), EXPORT(JIT_HELPER_FUNC_NAME(map_update_elem)), EXPORT(JIT_HELPER_FUNC_NAME(map_lookup_elem)), EXPORT(JIT_HELPER_FUNC_NAME(map_get_next_key)), -- 2.10.1