From 99ad1417db2e83530b88e3eff1a40285d6ebfee9 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Tue, 24 Mar 2015 09:57:50 -0400 Subject: [PATCH] tools lib traceevent: Copy trace_clock and free it The pevent->trace_clock should not be a direct pointer to what was given. It should be copied and freed. Note, valgrind pointed this out when a caller passed in a pointer that needed to be freed and it never was. Ideally, pevent should copy it (which this change does), and free the copy. It's up to the caller to free the clock string passed in. Signed-off-by: Steven Rostedt Cc: Andrew Morton Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/20150324135922.695906738@goodmis.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 10 ++++++++-- tools/lib/traceevent/event-parse.h | 2 +- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 31d4e7da191c..e71c472d6a81 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -321,9 +321,14 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid) return 0; } -void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock) +int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock) { - pevent->trace_clock = trace_clock; + pevent->trace_clock = strdup(trace_clock); + if (!pevent->trace_clock) { + errno = ENOMEM; + return -1; + } + return 0; } struct func_map { @@ -6352,6 +6357,7 @@ void pevent_free(struct pevent *pevent) free_handler(handle); } + free(pevent->trace_clock); free(pevent->events); free(pevent->sort_events); diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 6abda54d76f2..84e554f84574 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -599,7 +599,7 @@ enum trace_flag_type { }; int pevent_register_comm(struct pevent *pevent, const char *comm, int pid); -void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock); +int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock); int pevent_register_function(struct pevent *pevent, char *name, unsigned long long addr, char *mod); int pevent_register_print_string(struct pevent *pevent, const char *fmt, -- 2.20.1