linux-kernel - [PATCH v3 1/7] perf tools: Set vdso name to vdso[64,32] depending on platform

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Date:	Thu, 12 May 2016 08:43:10 +0000
From:	He Kuang <hekuang@...wei.com>
To:	<peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
	<alexander.shishkin@...ux.intel.com>, <jolsa@...hat.com>,
	<wangnan0@...wei.com>, <hekuang@...wei.com>, <jpoimboe@...hat.com>,
	<ak@...ux.intel.com>, <eranian@...gle.com>, <namhyung@...nel.org>,
	<adrian.hunter@...el.com>, <sukadev@...ux.vnet.ibm.com>,
	<masami.hiramatsu.pt@...achi.com>, <tumanova@...ux.vnet.ibm.com>,
	<kan.liang@...el.com>, <penberg@...nel.org>, <dsahern@...il.com>
CC:	<linux-kernel@...r.kernel.org>
Subject: [PATCH v3 1/7] perf tools: Set vdso name to vdso[64,32] depending on platform

This is a preparation for cross-platform vdso lookup.

There is a naming confusion about vdso name, vdso buildid generated by
a 32-bit machine stores it with the name 'vdso', but when processing
buildid on a 64-bit machine with the same 'perf.data', perf will
search for vdso named as 'vdso32' and get failed.

This patch uses different names when storing the buildid, i.e. vdso64
for 64-bit machine and vdso32 for 32-bit machine, and eliminates this
naming confusion.

Signed-off-by: He Kuang <hekuang@...wei.com>
---
 tools/perf/util/vdso.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/vdso.h b/tools/perf/util/vdso.h
index cdc4fab..45e9ef4 100644
--- a/tools/perf/util/vdso.h
+++ b/tools/perf/util/vdso.h
@@ -4,10 +4,15 @@
 #include <linux/types.h>
 #include <string.h>
 #include <stdbool.h>
+#include "util.h"
 
 #define VDSO__MAP_NAME "[vdso]"
 
-#define DSO__NAME_VDSO    "[vdso]"
+#if BITS_PER_LONG == 64
+#define DSO__NAME_VDSO    "[vdso64]"
+#else
+#define DSO__NAME_VDSO    "[vdso32]"
+#endif
 #define DSO__NAME_VDSO32  "[vdso32]"
 #define DSO__NAME_VDSOX32 "[vdsox32]"
 
-- 
1.8.5.2