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: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 9891d8c..6ab7a7a 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -114,8 +114,9 @@
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;
@@ -234,13 +235,17 @@
sc = trace->syscalls.table + id;
sc->name = name;
- if (trace->ev_qualifier && !strlist__find(trace->ev_qualifier, name)) {
- sc->filtered = true;
- /*
- * No need to do read tracepoint information since this will be
- * filtered out.
- */
- return 0;
+ 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
+ * filtered out.
+ */
+ return 0;
+ }
}
sc->fmt = syscall_fmt__find(sc->name);
@@ -725,7 +730,12 @@
}
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);