5 files changed, 51 insertions, 12 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index e306857..212fade 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -5,6 +5,8 @@
 
 #include "util.h"
 #include "header.h"
+#include "../perf.h"
+#include "trace-event.h"
 
 /*
  * Create new perf.data header attribute:
@@ -62,6 +64,8 @@ struct perf_header *perf_header__new(void)
 
 	self->data_offset = 0;
 	self->data_size = 0;
+	self->trace_info_offset = 0;
+	self->trace_info_size = 0;
 
 	return self;
 }
@@ -145,8 +149,16 @@ struct perf_file_header {
 	struct perf_file_section	attrs;
 	struct perf_file_section	data;
 	struct perf_file_section	event_types;
+	struct perf_file_section	trace_info;
 };
 
+static int trace_info;
+
+void perf_header__set_trace_info(void)
+{
+	trace_info = 1;
+}
+
 static void do_write(int fd, void *buf, size_t size)
 {
 	while (size) {
@@ -198,6 +210,23 @@ void perf_header__write(struct perf_header *self, int fd)
 	if (events)
 		do_write(fd, events, self->event_size);
 
+	if (trace_info) {
+		static int trace_info_written;
+
+		/*
+		 * Write it only once
+		 */
+		if (!trace_info_written) {
+			self->trace_info_offset = lseek(fd, 0, SEEK_CUR);
+			read_tracing_data(fd, attrs, nr_counters);
+			self->trace_info_size = lseek(fd, 0, SEEK_CUR) -
+						self->trace_info_offset;
+			trace_info_written = 1;
+		} else {
+			lseek(fd, self->trace_info_offset +
+				self->trace_info_size, SEEK_SET);
+		}
+	}
 
 	self->data_offset = lseek(fd, 0, SEEK_CUR);
 
@@ -217,6 +246,10 @@ void perf_header__write(struct perf_header *self, int fd)
 			.offset = self->event_offset,
 			.size	= self->event_size,
 		},
+		.trace_info = {
+			.offset = self->trace_info_offset,
+			.size = self->trace_info_size,
+		},
 	};
 
 	lseek(fd, 0, SEEK_SET);
@@ -290,6 +323,15 @@ struct perf_header *perf_header__read(int fd)
 		do_read(fd, events, f_header.event_types.size);
 		event_count =  f_header.event_types.size / sizeof(struct perf_trace_event_type);
 	}
+
+	self->trace_info_offset = f_header.trace_info.offset;
+	self->trace_info_size = f_header.trace_info.size;
+
+	if (self->trace_info_size) {
+		lseek(fd, self->trace_info_offset, SEEK_SET);
+		trace_report(fd);
+	}
+
 	self->event_offset = f_header.event_types.offset;
 	self->event_size   = f_header.event_types.size;
 
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index a2916b6..30aee51 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -21,6 +21,8 @@ struct perf_header {
 	u64 data_size;
 	u64 event_offset;
 	u64 event_size;
+	u64 trace_info_offset;
+	u64 trace_info_size;
 };
 
 struct perf_header *perf_header__read(int fd);
@@ -40,7 +42,7 @@ void perf_header_attr__add_id(struct perf_header_attr *self, u64 id);
 u64 perf_header__sample_type(struct perf_header *header);
 struct perf_event_attr *
 perf_header__find_attr(u64 id, struct perf_header *header);
-
+void perf_header__set_trace_info(void);
 
 struct perf_header *perf_header__new(void);
 
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index af4b057..831052d 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -496,14 +496,12 @@ get_tracepoints_path(struct perf_event_attr *pattrs, int nb_events)
 
 	return path.next;
 }
-void read_tracing_data(struct perf_event_attr *pattrs, int nb_events)
+void read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events)
 {
 	char buf[BUFSIZ];
 	struct tracepoint_path *tps;
 
-	output_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, 0644);
-	if (output_fd < 0)
-		die("creating file '%s'", output_file);
+	output_fd = fd;
 
 	buf[0] = 23;
 	buf[1] = 8;
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 1b5c847..44292e0 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -458,9 +458,8 @@ struct record *trace_read_data(int cpu)
 	return data;
 }
 
-void trace_report(void)
+void trace_report(int fd)
 {
-	const char *input_file = "trace.info";
 	char buf[BUFSIZ];
 	char test[] = { 23, 8, 68 };
 	char *version;
@@ -468,9 +467,7 @@ void trace_report(void)
 	int show_funcs = 0;
 	int show_printk = 0;
 
-	input_fd = open(input_file, O_RDONLY);
-	if (input_fd < 0)
-		die("opening '%s'\n", input_file);
+	input_fd = fd;
 
 	read_or_die(buf, 3);
 	if (memcmp(buf, test, 3) != 0)
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 5f59a39..da77e07 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -158,7 +158,7 @@ struct record *trace_read_data(int cpu);
 
 void parse_set_info(int nr_cpus, int long_sz);
 
-void trace_report(void);
+void trace_report(int fd);
 
 void *malloc_or_die(unsigned int size);
 
@@ -244,6 +244,6 @@ unsigned long long
 raw_field_value(struct event *event, const char *name, void *data);
 void *raw_field_ptr(struct event *event, const char *name, void *data);
 
-void read_tracing_data(struct perf_event_attr *pattrs, int nb_events);
+void read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events);
 
 #endif /* __PERF_TRACE_EVENTS_H */