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Date: Tue, 14 Oct 2014 18:04:25 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Ingo Molnar <mingo@...nel.org> Cc: linux-kernel@...r.kernel.org, Arnaldo Carvalho de Melo <acme@...hat.com>, Adrian Hunter <adrian.hunter@...el.com>, Borislav Petkov <bp@...e.de>, David Ahern <dsahern@...il.com>, Don Zickus <dzickus@...hat.com>, Frederic Weisbecker <fweisbec@...il.com>, Jean Pihet <jean.pihet@...aro.org>, Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>, Namhyung Kim <namhyung@...nel.org>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <peterz@...radead.org>, Stephane Eranian <eranian@...gle.com> Subject: [PATCH 16/24] perf evlist: Check that there is a thread_map when preparing a workload From: Arnaldo Carvalho de Melo <acme@...hat.com> The perf_evlist__prepare_workload expects a thread map to be in place so that it can store the pid of the workload being started, so check it and tell the developer about it instead of segfaulting. Cc: Adrian Hunter <adrian.hunter@...el.com> Cc: Borislav Petkov <bp@...e.de> Cc: David Ahern <dsahern@...il.com> Cc: Don Zickus <dzickus@...hat.com> Cc: Frederic Weisbecker <fweisbec@...il.com> Cc: Jean Pihet <jean.pihet@...aro.org> Cc: Jiri Olsa <jolsa@...hat.com> Cc: Mike Galbraith <efault@....de> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Stephane Eranian <eranian@...gle.com> Link: http://lkml.kernel.org/n/tip-jvlz2f264e7kpmhjmwltikqw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- tools/perf/util/evlist.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 3cebc9a8d52e..5fc7bd42c803 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1276,8 +1276,14 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *tar sigaction(SIGUSR1, &act, NULL); } - if (target__none(target)) + if (target__none(target)) { + if (evlist->threads == NULL) { + fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", + __func__, __LINE__); + goto out_close_pipes; + } evlist->threads->map[0] = evlist->workload.pid; + } close(child_ready_pipe[1]); close(go_pipe[0]); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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