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perf trace: Support ! in -e expressions

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-08-21 12:56:21 -03:00
parent 8c9dc52850
commit b059efdf52
2 changed files with 21 additions and 9 deletions
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2
tools/perf/Documentation/perf-trace.txt
View file

@ -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=::

28
tools/perf/builtin-trace.c
View file

@ -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;
@ -234,13 +235,17 @@ 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)) {
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 @@ 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);