[PATCH v2 12/21] libtracefs; Add error message for bad selections to SQL sequence

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>

If the building of the synthetic event fails on creating the selection,
report it properly.

Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
 src/tracefs-sqlhist.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/tracefs-sqlhist.c b/src/tracefs-sqlhist.c
index d39851845570..e542eb95c17f 100644
--- a/src/tracefs-sqlhist.c
+++ b/src/tracefs-sqlhist.c
@@ -971,6 +971,16 @@ static void *synth_init_error(struct tep_handle *tep, struct sql_table *table)
 	return field_match_error(tep, sb, match);
 }
 
+static void selection_error(struct tep_handle *tep,
+			    struct sqlhist_bison *sb, struct expr *expr)
+{
+	/* We just care about event not existing */
+	if (errno != ENODEV)
+		return;
+
+	test_field_exists(tep, sb, expr);
+}
+
 static struct tracefs_synth *build_synth(struct tep_handle *tep,
 					 const char *name,
 					 struct sql_table *table)
@@ -1051,8 +1061,10 @@ static struct tracefs_synth *build_synth(struct tep_handle *tep,
 				ret = tracefs_synth_add_end_field(synth,
 						field->field, field->label);
 			}
-			if (ret < 0)
+			if (ret < 0) {
+				selection_error(tep, table->sb, expr);
 				goto free;
+			}
 			continue;
 		}
 
-- 
2.30.2