Add test to trace-cmd command line to test tracecmd_read_at

The trace-cmd command line does not use tracecmd_read_at, but it
still needs to be tested. This allows easy access to test the
tracecmd_read_at routine.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/trace-read.c b/trace-read.c
index 3baa9d8..bf01c55 100644
--- a/trace-read.c
+++ b/trace-read.c
@@ -44,6 +44,52 @@ const char *input_file = "trace.dat";
 
 static int filter_cpu = -1;
 
+/* Debug variables for testing tracecmd_read_at */
+#define TEST_READ_AT 0
+#if TEST_READ_AT
+static off64_t test_read_at_offset;
+static int test_read_at_copy = 100;
+static int test_read_at_index;
+static void test_read_at(struct tracecmd_input *handle)
+{
+        struct pevent *pevent;
+        struct record *record;
+        struct trace_seq s;
+        int cpu;
+
+        if (!test_read_at_offset) {
+                printf("\nNO RECORD COPIED\n");
+                return;
+        }
+
+        pevent = tracecmd_get_pevent(handle);
+
+        record = tracecmd_read_at(handle, test_read_at_offset, &cpu);
+        printf("\nHERE'S THE COPY RECORD\n");
+        trace_seq_init(&s);
+        pevent_print_event(pevent, &s, cpu, record->data, record->size, record->ts);
+        trace_seq_do_printf(&s);
+        printf("\n");
+
+        free(record);
+}
+
+static void test_read_at_save(struct record *record)
+{
+        if (test_read_at_index++ == test_read_at_copy) {
+                test_read_at_offset = record->offset;
+                printf("\nUSING THIS RECORD\n");
+        }
+}
+#else
+static void test_read_at(struct tracecmd_input *handle)
+{
+}
+static void test_read_at_save(struct record *record)
+{
+}
+#endif /* TEST_READ_AT */
+
 static void show_data(struct tracecmd_input *handle, int cpu)
 {
         struct pevent *pevent;
@@ -54,6 +100,8 @@ static void show_data(struct tracecmd_input *handle, int cpu)
 
         record = tracecmd_read_data(handle, cpu);
 
+        test_read_at_save(record);
+
         trace_seq_init(&s);
         pevent_print_event(pevent, &s, cpu, record->data, record->size, record->ts);
         trace_seq_do_printf(&s);
@@ -119,6 +167,8 @@ static void read_data_info(struct tracecmd_input *handle)
                         show_data(handle, next);
 
         } while (next >= 0);
+
+        test_read_at(handle);
 }
 
 struct tracecmd_input *read_trace_header(void)