perf annotate: Add --symfs option

If you have --symfs in perf report, then you also need it for perf
annotate.  This allows off-box assembly level analysis of perf.data
samples.

This patch complements:

commit ec5761eab318e50e69fcf8e63e9edaef5949c067
Author: David Ahern <daahern@cisco.com>
Date:   Thu Dec 9 13:27:07 2010 -0700

    perf symbols: Add symfs option for off-box analysis using specified tree

Acked-by: David Ahern <daahern@cisco.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <daahern@cisco.com>
Link: http://lkml.kernel.org/r/20110729232040.GA21838@quad
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index 5bc06001557f..98a31e3181a5 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -80,6 +80,9 @@ OPTIONS
         Interleave source code with assembly code. Enabled by default,
         disable with --no-source.
 
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1]
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 5015e04b8214..c5be28851f01 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -267,6 +267,8 @@ static const struct option options[] = {
         OPT_BOOLEAN('P', "full-paths", &full_paths,
                     "Don't shorten the displayed pathnames"),
         OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
+        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+                   "Look for files with symbols relative to this directory"),
         OPT_BOOLEAN('0', "source", &symbol_conf.annotate_src,
                     "Interleave source code with assembly code (default)"),
         OPT_BOOLEAN('0', "asm-raw", &symbol_conf.annotate_asm_raw,