perf top: Allow passing a kallsyms file

This basically replicates what was done for 'perf report' in:

   b226a5a72901 ("perf report: Allow user to specify path to kallsyms file")

This should help with resolving eBPF symbols, that are in kallsyms but,
of course, not in vmlinux.

Reported-by: Ivan Babrou <ibobrik@gmail.com>
Tested-by: Ivan Babrou <ibobrik@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-x52mx1ybq8128rtg9hjrj5qk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 808b664..44d89fb 100644 (file)
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -70,6 +70,9 @@ Default is to monitor all CPUS.
 --ignore-vmlinux::
        Ignore vmlinux files.
 
+--kallsyms=<file>::
+       kallsyms pathname
+
 -m <pages>::
 --mmap-pages=<pages>::
        Number of mmap data pages (must be a power of two) or size

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index aa0c73e..1252d17 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1289,6 +1289,8 @@ int cmd_top(int argc, const char **argv)
                   "file", "vmlinux pathname"),
        OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
                    "don't load vmlinux even if found"),
+       OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
+                  "file", "kallsyms pathname"),
        OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
                    "hide kernel symbols"),
        OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",