[PATCH 07/10] perf stat: Add event parsing error handling to add_default_attributes

[Jiri Olsa]

Adding missing error handling for parse_events calls
in add_default_attributes functions. The error handler
displays error details, like for transactions (-T):

Before:
  $ perf stat -T
  Cannot set up transaction events

After:
  $ perf stat -T
  Cannot set up transaction events
  event syntax error: 
'..cycles,cpu/cycles-t/,cpu/tx-start/,cpu/el-start/,cpu/cycles-ct/}'
                                    \___ unknown term

Link: http://lkml.kernel.org/n/tip-hmctifkfiaij47xb9en1h...@git.kernel.org
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 tools/perf/builtin-stat.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a8f93885763a..cc3dd85d5a60 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2451,14 +2451,13 @@ static int add_default_attributes(void)
        (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
        (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          
},
 };
+       struct parse_events_error errinfo;
 
        /* Set attrs if no event is selected and !null_run: */
        if (null_run)
                return 0;
 
        if (transaction_run) {
-               struct parse_events_error errinfo;
-
                if (pmu_have_event("cpu", "cycles-ct") &&
                    pmu_have_event("cpu", "el-start"))
                        err = parse_events(evsel_list, transaction_attrs,
@@ -2469,6 +2468,7 @@ static int add_default_attributes(void)
                                           &errinfo);
                if (err) {
                        fprintf(stderr, "Cannot set up transaction events\n");
+                       parse_events_print_error(&errinfo, transaction_attrs);
                        return -1;
                }
                return 0;
@@ -2494,10 +2494,11 @@ static int add_default_attributes(void)
                    pmu_have_event("msr", "smi")) {
                        if (!force_metric_only)
                                metric_only = true;
-                       err = parse_events(evsel_list, smi_cost_attrs, NULL);
+                       err = parse_events(evsel_list, smi_cost_attrs, 
&errinfo);
                } else {
                        fprintf(stderr, "To measure SMI cost, it needs "
                                "msr/aperf/, msr/smi/ and cpu/cycles/ 
support\n");
+                       parse_events_print_error(&errinfo, smi_cost_attrs);
                        return -1;
                }
                if (err) {
@@ -2532,12 +2533,13 @@ static int add_default_attributes(void)
                if (topdown_attrs[0] && str) {
                        if (warn)
                                arch_topdown_group_warn();
-                       err = parse_events(evsel_list, str, NULL);
+                       err = parse_events(evsel_list, str, &errinfo);
                        if (err) {
                                fprintf(stderr,
                                        "Cannot set up top down events %s: 
%d\n",
                                        str, err);
                                free(str);
+                               parse_events_print_error(&errinfo, str);
                                return -1;
                        }
                } else {
-- 
2.13.6