While parsing the tracepoint events in parse_events_add_tracepoint() function, code checks for HAVE_LIBTRACEEVENT support. This is needed since libtraceevent is necessary for tracepoint. But while adding probe points, check for LIBTRACEEVENT is not done in case of perf probe. Hence, in environment with missing libtraceevent-devel, it is observed that adding a probe point works even though its not supported.
Example: Adding probe point: ./perf probe 'vfs_getname=getname_flags:72 pathname=result->name:string' Added new event: probe:vfs_getname (on getname_flags:72 with pathname=result->name:string) You can now use it in all perf tools, such as: perf record -e probe:vfs_getname -aR sleep 1 But trying perf record: ./perf record -e probe:vfs_getname -aR sleep 1 event syntax error: 'probe:vfs_getname' \___ unsupported tracepoint libtraceevent is necessary for tracepoint support Run 'perf list' for a list of valid events Fix this by wrapping "builtin-probe" compilation and "perf probe" usage under "CONFIG_LIBTRACEEVENT" check. Signed-off-by: Athira Rajeev <atraj...@linux.vnet.ibm.com> --- tools/perf/Build | 4 +++- tools/perf/perf.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/perf/Build b/tools/perf/Build index 6dd67e502295..a138a2304929 100644 --- a/tools/perf/Build +++ b/tools/perf/Build @@ -33,7 +33,9 @@ ifeq ($(CONFIG_LIBTRACEEVENT),y) perf-$(CONFIG_TRACE) += trace/beauty/ endif -perf-$(CONFIG_LIBELF) += builtin-probe.o +ifeq ($(CONFIG_LIBTRACEEVENT),y) + perf-$(CONFIG_LIBELF) += builtin-probe.o +endif perf-y += bench/ perf-y += tests/ diff --git a/tools/perf/perf.c b/tools/perf/perf.c index 82bbe0ca858b..7b0d79284d5a 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -80,9 +80,11 @@ static struct cmd_struct commands[] = { #ifdef HAVE_LIBTRACEEVENT { "sched", cmd_sched, 0 }, #endif +#ifdef HAVE_LIBTRACEEVENT #ifdef HAVE_LIBELF_SUPPORT { "probe", cmd_probe, 0 }, #endif +#endif #ifdef HAVE_LIBTRACEEVENT { "kmem", cmd_kmem, 0 }, { "lock", cmd_lock, 0 }, -- 2.39.0