From: Arnaldo Carvalho de Melo <a...@redhat.com> So that we can ask for all but a set of syscalls to be traced.
Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Mike Galbraith <efa...@gmx.de> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/n/tip-9j6hvap23qanyl96wx4mr...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/Documentation/perf-trace.txt | 2 ++ tools/perf/builtin-trace.c | 28 +++++++++++++++++++--------- 2 files changed, 21 insertions(+), 9 deletions(-) diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index cb3371e..4754f11 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -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=:: 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 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); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
