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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: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Arnaldo Carvalho de Melo 2015-08-04 17:01:04 -03:00
parent 2e5e5f8761
commit 08c987763a
1 changed files with 6 additions and 4 deletions
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10
tools/perf/builtin-trace.c
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@ -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)) {