[PATCH 2/3] libtracecmd: Do not free records at end of iterator

[Steven Rostedt <rostedt@goodmis.org>]

From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

I'm not sure why the records that were saved in the "peek" were freed, as
they should be freed when the tracecmd_input is closed.

Remove the freeing of the "peek" records, as it should be unneeded.

This basically reverts:

  890855541 ("tracecmd library: Unlock records in tracecmd_iterate_events()")

And commits that simulated it.

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 lib/trace-cmd/trace-input.c | 63 -------------------------------------
 1 file changed, 63 deletions(-)

diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 0dc3dbdc676a..bc937b0491d7 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -2854,19 +2854,6 @@ int tracecmd_iterate_events(struct tracecmd_input *handle,
 		}
 	} while (next_cpu >= 0 && ret == 0);
 
-	/* Need to unlock and free the records */
-	for (cpu = 0; cpu < handle->cpus; cpu++) {
-		int offset;
-
-		if (!records[cpu])
-			continue;
-
-		offset = (int)(records[cpu]->offset & (handle->page_size - 1));
-		free_next(handle, cpu);
-		/* Reset the buffer to read the cached record again */
-		kbuffer_read_at_offset(handle->cpu_data[cpu].kbuf, offset, NULL);
-	}
-
 	free(records);
 
 	return ret;
@@ -2909,25 +2896,6 @@ load_records(struct tracecmd_input *handle, int cpu,
 	return last_record;
 }
 
-static void free_last_record(struct tracecmd_input *handle, struct tep_record *record,
-			     int cpu)
-{
-	record->priv = handle->cpu_data[cpu].page;
-	tracecmd_free_record(record);
-}
-
-static void free_last_records(struct tracecmd_input *handle, struct tep_record *records,
-			      int cpu)
-{
-	struct tep_record *last_record;
-
-	while (records) {
-		last_record = records;
-		records = last_record->priv;
-		free_last_record(handle, last_record, cpu);
-	}
-}
-
 static void initialize_last_events(struct tracecmd_input *handle,
 				   struct tep_record **last_records,
 				   cpu_set_t *cpu_set, int cpu_size,
@@ -3062,20 +3030,6 @@ int tracecmd_iterate_events_reverse(struct tracecmd_input *handle,
 		}
 	} while (next_cpu >= 0 && ret == 0);
 
-	for (cpu = 0; cpu < max_cpus; cpu++) {
-		int offset;
-
-		/* Get the next record to set the index to. */
-		record = peek_last_event(handle, records, cpu);
-		if (!record)
-			continue;
-		/* Reset the buffer to read the cached record again */
-		offset = record->offset & (handle->page_size - 1);
-		free_last_records(handle, records[cpu], cpu);
-		/* Reset the buffer to read the cached record again */
-		kbuffer_read_at_offset(handle->cpu_data[cpu].kbuf, offset, NULL);
-	}
-
 	free(records);
 
 	return ret;
@@ -3164,23 +3118,6 @@ int tracecmd_iterate_events_multi(struct tracecmd_input **handles,
 
 	} while (next_cpu >= 0 && ret == 0);
 
-	/* Unlock and free the records */
-	for (cpu = 0; cpu < all_cpus; cpu++) {
-		int local_cpu;
-		int offset;
-
-		if (!records[cpu].record)
-			continue;
-
-		handle = records[cpu].handle;
-		local_cpu = cpu - handle->start_cpu;
-
-		offset = (int)(records[cpu].record->offset & (handle->page_size - 1));
-		free_next(handle, local_cpu);
-		/* Reset the buffer to read the cached record again */
-		kbuffer_read_at_offset(handle->cpu_data[local_cpu].kbuf, offset, NULL);
-	}
-
 	free(records);
 
 	return ret;
-- 
2.43.0