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Commit b059efdf authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf trace: Support ! in -e expressions 

So that we can ask for all but a set of syscalls to be traced.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-9j6hvap23qanyl96wx4mrj9k@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8c9dc528

tools/perf/Documentation/perf-trace.txt

+2 −0
Original line number Diff line number Diff line
@@ -30,6 +30,8 @@ OPTIONS 
-e::

--expr::

	List of events to show, currently only syscall names.

	Prefixing with ! shows all syscalls but the ones specified.  You may

	need to escape it.



-o::

--output=::

tools/perf/builtin-trace.c

+19 −9
Original line number Diff line number Diff line
@@ -114,8 +114,9 @@ struct trace { 
	struct machine		host;

	u64			base_time;

	FILE			*output;

	struct strlist		*ev_qualifier;

	unsigned long		nr_events;

	struct strlist		*ev_qualifier;

	bool			not_ev_qualifier;

	bool			sched;

	bool			multiple_threads;

	double			duration_filter;
@@ -234,7 +235,10 @@ static int trace__read_syscall_info(struct trace *trace, int id) 
	sc = trace->syscalls.table + id;

	sc->name = name;



	if (trace->ev_qualifier && !strlist__find(trace->ev_qualifier, name)) {

	if (trace->ev_qualifier) {

		bool in = strlist__find(trace->ev_qualifier, name) != NULL;



		if (!(in ^ trace->not_ev_qualifier)) {

			sc->filtered = true;

			/*

			 * No need to do read tracepoint information since this will be
@@ -242,6 +246,7 @@ static int trace__read_syscall_info(struct trace *trace, int id) 
			 */

			return 0;

		}

	}



	sc->fmt  = syscall_fmt__find(sc->name);
@@ -725,7 +730,12 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) 
	}



	if (ev_qualifier_str != NULL) {

		trace.ev_qualifier = strlist__new(true, ev_qualifier_str);

		const char *s = ev_qualifier_str;



		trace.not_ev_qualifier = *s == '!';

		if (trace.not_ev_qualifier)

			++s;

		trace.ev_qualifier = strlist__new(true, s);

		if (trace.ev_qualifier == NULL) {

			fputs("Not enough memory to parse event qualifier",

			      trace.output);