2012-06-06 06:56:24

by Arnaldo Carvalho de Melo

[permalink] [raw]
Subject: [tip:perf/urgent] perf report: Use the right symbol for annotation

Commit-ID: 91557e847dbc715acf2d847a1ffec63f71b00b65
Gitweb: http://git.kernel.org/tip/91557e847dbc715acf2d847a1ffec63f71b00b65
Author: Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Wed, 30 May 2012 12:25:52 -0300
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Wed, 30 May 2012 12:25:52 -0300

perf report: Use the right symbol for annotation

In non symbolic views, i.e. --sort without "symbol", as in:

perf report --sort comm

We're segfaulting in the --tui because we're testing the symbol resolved
and then trying to use the symbol on the histogram entry where we're
coalescing all hits for a COMM, and the first hist_entry for a comm may
have a NULL symbol, i.e. the RIP didn't resolve to any symbol.

In this case we're segfaulting, fix it by testing against the symbol in
the histogram entry.

Reported-by: William Cohen <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/builtin-report.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 8c767c6..2400e00 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -162,7 +162,7 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
* so we don't allocated the extra space needed because the stdio
* code will not use it.
*/
- if (al->sym != NULL && use_browser > 0) {
+ if (he->ms.sym != NULL && use_browser > 0) {
struct annotation *notes = symbol__annotation(he->ms.sym);

assert(evsel != NULL);