[PATCH v4 10/25] trace-cmd library: Add section header before flyrecord trace data

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

In trace file version 7, write a section header at the beginning of each
section with flyrecord trace data.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/trace-output.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index 63f00cba..a5025d50 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -1892,10 +1892,12 @@ __hidden int out_write_cpu_data(struct tracecmd_output *handle,
 				int cpus, struct cpu_data_source *data, const char *buff_name)
 {
 	struct data_file_write *data_files = NULL;
+	enum tracecmd_section_flags flags = 0;
 	tsize_t data_offs, offset;
 	unsigned long long endian8;
 	unsigned long long read_size;
 	char *clock;
+	char *str;
 	int ret;
 	int i;
 
@@ -1914,6 +1916,13 @@ __hidden int out_write_cpu_data(struct tracecmd_output *handle,
 	if (!HAS_SECTIONS(handle) && do_write_check(handle, "flyrecord", 10))
 		goto out_free;
 
+	if (asprintf(&str, "buffer flyrecord %s", buff_name) < 1)
+		goto out_free;
+	offset = out_write_section_header(handle, TRACECMD_OPTION_BUFFER, str, flags, false);
+	free(str);
+	if (offset == (off_t)-1)
+		goto out_free;
+
 	data_files = calloc(cpus, sizeof(*data_files));
 	if (!data_files)
 		goto out_free;
@@ -2002,6 +2011,9 @@ __hidden int out_write_cpu_data(struct tracecmd_output *handle,
 	if (do_lseek(handle, 0, SEEK_END) == (off64_t)-1)
 		return -1;
 
+	if (out_update_section_header(handle, offset))
+		goto out_free;
+
 	handle->file_state = TRACECMD_FILE_CPU_FLYRECORD;
 
 	return 0;
-- 
2.31.1