redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

perf tools: Fix segfault in cumulative.callchain report 

When cumulative callchain mode is on, we could get samples with
with no actual hits. This breaks the assumption of the annotation
code, that each sample has annotation counts allocated and leads
to segfault.

Fixing this by additional checks for annotation stats.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1402821332-12419-1-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
hifive-unleashed-5.1
Jiri Olsa 2014-06-15 10:22:15 +02:00
parent cf230918cd
commit d755330c5e
1 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
tools/perf/ui/browsers/hists.c
View File

@ -17,6 +17,7 @@
#include "../util.h"
#include "../ui.h"
#include "map.h"
#include "annotate.h"
struct hist_browser {
struct ui_browser b;
@ -1593,13 +1594,18 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
bi->to.sym->name) > 0)
annotate_t = nr_options++;
} else {
if (browser->selection != NULL &&
browser->selection->sym != NULL &&
!browser->selection->map->dso->annotate_warned &&
asprintf(&options[nr_options], "Annotate %s",
browser->selection->sym->name) > 0)
annotate = nr_options++;
!browser->selection->map->dso->annotate_warned) {
struct annotation *notes;
notes = symbol__annotation(browser->selection->sym);
if (notes->src &&
asprintf(&options[nr_options], "Annotate %s",
browser->selection->sym->name) > 0)
annotate = nr_options++;
}
}
if (thread != NULL &&
@ -1656,6 +1662,7 @@ retry_popup_menu:
if (choice == annotate || choice == annotate_t || choice == annotate_f) {
struct hist_entry *he;
struct annotation *notes;
int err;
do_annotate:
if (!objdump_path && perf_session_env__lookup_objdump(env))
@ -1679,6 +1686,10 @@ do_annotate:
he->ms.map = he->branch_info->to.map;
}
notes = symbol__annotation(he->ms.sym);
if (!notes->src)
continue;
/*
* Don't let this be freed, say, by hists__decay_entry.
*/