This patch fixes a bug that, when offset is provided but function is lost, parse_perf_probe_point() will give a "" string as function name, so the checking code at the end of parse_perf_probe_point() become useless. For example:
# perf probe +0x1234 Failed to find symbol in kernel Error: Failed to add events. After this patch: # perf probe +0x1234 Semantic error :Offset requires an entry function. Error: Command Parse Error. Signed-off-by: Wang Nan <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Steven Rostedt <[email protected]> --- tools/perf/util/probe-event.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 926bcec..eaacb58 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1194,9 +1194,13 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) *ptr++ = '\0'; } - tmp = strdup(arg); - if (tmp == NULL) - return -ENOMEM; + if (arg[0] == '\0') + tmp = NULL; + else { + tmp = strdup(arg); + if (tmp == NULL) + return -ENOMEM; + } if (file_spec) pp->file = tmp; -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
