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authorArnaldo Carvalho de Melo <acme@redhat.com>2018-05-03 15:59:58 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-05-11 12:10:02 -0300
commitc23080a6e4e853cff2834436e3cf33eae7723900 (patch)
treeac1d5d0a8301d5fec78aeba8eeab2c385b3b0349 /tools/perf
parent3a0887997d6731e1005ba09c93aa5c2898c78931 (diff)
downloadop-kernel-dev-c23080a6e4e853cff2834436e3cf33eae7723900.zip
op-kernel-dev-c23080a6e4e853cff2834436e3cf33eae7723900.tar.gz
perf tools: Add missing newline when parsing empty BPF proggie
This is not specific to BPF but was found when parsing a .c BPF proggie that while valid, had no events attached to tracepoints, kprobes, etc: Very minimal file that perf's BPF code can compile: # cat empty.c char _license[] __attribute__((section("license"), used)) = "GPL"; int _version __attribute__((section("version"), used)) = LINUX_VERSION_CODE; # Before this patch: # perf trace -e empty.c WARNING: event parser found nothinginvalid or unsupported event: 'empty.c' Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events # After: # perf trace -e empty.c WARNING: event parser found nothing invalid or unsupported event: 'empty.c' Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-8ysughiz00h6mjpcot04qyjj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/parse-events.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 2fb0272..b8b8a95 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1715,7 +1715,7 @@ int parse_events(struct perf_evlist *evlist, const char *str,
struct perf_evsel *last;
if (list_empty(&parse_state.list)) {
- WARN_ONCE(true, "WARNING: event parser found nothing");
+ WARN_ONCE(true, "WARNING: event parser found nothing\n");
return -1;
}
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