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| author |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-02-13 12:11:44 -0500 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-02-13 17:22:32 -0300 |
| commit | 14e4d7e0abfdefabea2b8796c5a8b2b9c77b5326 (patch) | |
| tree | 67534e032e643bc2a42d82e7f7645ce8d1bac8a8 /tools | |
| parent | perf scripting perl: Fix compile error with some perl5 versions (diff) | |
| download | linux-dev-14e4d7e0abfdefabea2b8796c5a8b2b9c77b5326.tar.xz linux-dev-14e4d7e0abfdefabea2b8796c5a8b2b9c77b5326.zip | |
tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP
A undefined value was being used for the OLD_RING_BUFFER_TYPE_TIME_STAMP
case entry, as the 'length' variable was not being initialized, fix it.
Caught by the reporter when building tools/perf/ using clang, which emmitted
this warning:
kbuffer-parse.c:312:7: warning: variable 'length' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
case OLD_RINGBUF_TYPE_TIME_EXTEND:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
kbuffer-parse.c:339:29: note: uninitialized use occurs here
kbuf->next = kbuf->index + length;
^~~~~~
kbuffer-parse.c:297:21: note: initialize the variable 'length' to silence this warning
unsigned int length;
^
= 0
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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: http://lkml.kernel.org/r/20170213121418.47f279e8@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/traceevent/kbuffer-parse.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/traceevent/kbuffer-parse.c b/tools/lib/traceevent/kbuffer-parse.c index 65984f1c2974..c94e3641b046 100644 --- a/tools/lib/traceevent/kbuffer-parse.c +++ b/tools/lib/traceevent/kbuffer-parse.c @@ -315,6 +315,7 @@ static unsigned int old_update_pointers(struct kbuffer *kbuf) extend += delta; delta = extend; ptr += 4; + length = 0; break; case OLD_RINGBUF_TYPE_TIME_STAMP: |