[PATCH 1/4] perf header: Add struct perf_session_env

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

The struct perf_session_env will preserve environment information at
the time of perf record.  It can be accessed anytime after parsing a
perf.data file if needed.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/header.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 209dad4fee2b..99bdd3abce59 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -58,6 +58,29 @@ struct perf_header;
 int perf_file_header__read(struct perf_file_header *header,
 			   struct perf_header *ph, int fd);
 
+struct perf_session_env {
+	char			*hostname;
+	char			*os_release;
+	char			*version;
+	char			*arch;
+	int			nr_cpus_online;
+	int			nr_cpus_avail;
+	char			*cpu_desc;
+	char			*cpuid;
+	unsigned long long	total_mem;
+
+	int			nr_cmdline;
+	char			*cmdline;
+	int			nr_sibling_cores;
+	char			*sibling_cores;
+	int			nr_sibling_threads;
+	char			*sibling_threads;
+	int			nr_numa_nodes;
+	char			*numa_nodes;
+	int			nr_pmu_mappings;
+	char			*pmu_mappings;
+};
+
 struct perf_header {
 	int			frozen;
 	bool			needs_swap;
@@ -67,6 +90,7 @@ struct perf_header {
 	u64			event_offset;
 	u64			event_size;
 	DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+	struct perf_session_env env;
 };
 
 struct perf_evlist;
-- 
1.7.11.4