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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8c9dc528
...@@ -30,6 +30,8 @@ OPTIONS ...@@ -30,6 +30,8 @@ OPTIONS
-e:: -e::
--expr:: --expr::
List of events to show, currently only syscall names. 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:: -o::
--output=:: --output=::
......
...@@ -114,8 +114,9 @@ struct trace { ...@@ -114,8 +114,9 @@ struct trace {
struct machine host; struct machine host;
u64 base_time; u64 base_time;
FILE *output; FILE *output;
struct strlist *ev_qualifier;
unsigned long nr_events; unsigned long nr_events;
struct strlist *ev_qualifier;
bool not_ev_qualifier;
bool sched; bool sched;
bool multiple_threads; bool multiple_threads;
double duration_filter; double duration_filter;
...@@ -234,7 +235,10 @@ static int trace__read_syscall_info(struct trace *trace, int id) ...@@ -234,7 +235,10 @@ static int trace__read_syscall_info(struct trace *trace, int id)
sc = trace->syscalls.table + id; sc = trace->syscalls.table + id;
sc->name = name; 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; sc->filtered = true;
/* /*
* No need to do read tracepoint information since this will be * 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) ...@@ -242,6 +246,7 @@ static int trace__read_syscall_info(struct trace *trace, int id)
*/ */
return 0; return 0;
} }
}
sc->fmt = syscall_fmt__find(sc->name); sc->fmt = syscall_fmt__find(sc->name);
...@@ -725,7 +730,12 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) ...@@ -725,7 +730,12 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
} }
if (ev_qualifier_str != NULL) { 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) { if (trace.ev_qualifier == NULL) {
fputs("Not enough memory to parse event qualifier", fputs("Not enough memory to parse event qualifier",
trace.output); trace.output);
......
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