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Commit 08c98776 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf trace: Remember if the vfs_getname tracepoint/kprobe is in place 

So that we can later decide if we will store where to expand the
pathname once we are handling vfs_getname or if we should instead
just go on and straight away print the pointer.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Milian Wolff <mail@milianw.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ytxk5s5jpc50wahffmlxgxuw@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2e5e5f87

tools/perf/builtin-trace.c

+6 −4
Original line number Diff line number Diff line
@@ -1312,6 +1312,7 @@ struct trace { 
	bool			show_tool_stats;

	bool			trace_syscalls;

	bool			force;

	bool			vfs_getname;

	int			trace_pgfaults;

};
@@ -2188,19 +2189,20 @@ static int trace__record(struct trace *trace, int argc, const char **argv) 


static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);



static void perf_evlist__add_vfs_getname(struct perf_evlist *evlist)

static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)

{

	struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");

	if (evsel == NULL)

		return;

		return false;



	if (perf_evsel__field(evsel, "pathname") == NULL) {

		perf_evsel__delete(evsel);

		return;

		return false;

	}



	evsel->handler = trace__vfs_getname;

	perf_evlist__add(evlist, evsel);

	return true;

}



static int perf_evlist__add_pgfault(struct perf_evlist *evlist,
@@ -2330,7 +2332,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv) 
		goto out_error_raw_syscalls;



	if (trace->trace_syscalls)

		perf_evlist__add_vfs_getname(evlist);

		trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);



	if ((trace->trace_pgfaults & TRACE_PFMAJ) &&

	    perf_evlist__add_pgfault(evlist, PERF_COUNT_SW_PAGE_FAULTS_MAJ)) {