linux-kernel - [tip:perf/core] perf top: Allow passing a kallsyms file

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Date:   Tue, 18 Dec 2018 05:54:09 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     acme@...hat.com, mingo@...nel.org, namhyung@...nel.org,
        davem@...emloft.net, adrian.hunter@...el.com, ast@...nel.org,
        tglx@...utronix.de, hpa@...or.com, dsahern@...il.com,
        daniel@...earbox.net, ibobrik@...il.com,
        linux-kernel@...r.kernel.org, wangnan0@...wei.com, jolsa@...nel.org
Subject: [tip:perf/core] perf top: Allow passing a kallsyms file

Commit-ID:  1b3aae90c6abdf8a844da2aa4aed1eb6947a7d39
Gitweb:     https://git.kernel.org/tip/1b3aae90c6abdf8a844da2aa4aed1eb6947a7d39
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Tue, 27 Nov 2018 10:31:03 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 17 Dec 2018 14:54:40 -0300

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@...il.com>
Tested-by: Ivan Babrou <ibobrik@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: David Ahern <dsahern@...il.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-x52mx1ybq8128rtg9hjrj5qk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/Documentation/perf-top.txt | 3 +++
 tools/perf/builtin-top.c              | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 808b664343c9..44d89fb9c788 100644
--- 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 aa0c73e57924..1252d1759064 100644
--- 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",