[tip:perf/core] perf machine: Fix machine.vmlinux_maps to make sure to clear the old one

[tip-bot for Masami Hiramatsu]

Commit-ID:  cc1121ab9687d660cc02f50b1a4974112f87a8e6
Gitweb:     http://git.kernel.org/tip/cc1121ab9687d660cc02f50b1a4974112f87a8e6
Author:     Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
AuthorDate: Wed, 9 Dec 2015 11:11:33 +0900
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 9 Dec 2015 13:42:00 -0300

perf machine: Fix machine.vmlinux_maps to make sure to clear the old one

Fix machine.vmlinux_maps to make sure to clear the old one if it is
renewal. This can leak the previous maps on the vmlinux_maps because
those are just overwritten.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20151209021133.10245.93730.stgit@xxxxxxxxxxxxxxxxxxxxx
[ Simplified the memset, same end result ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/machine.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index bfc289c..f5882b8 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -44,6 +44,8 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
 	machine->comm_exec = false;
 	machine->kernel_start = 0;
 
+	memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps));
+
 	machine->root_dir = strdup(root_dir);
 	if (machine->root_dir == NULL)
 		return -ENOMEM;
@@ -770,6 +772,9 @@ int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
 	enum map_type type;
 	u64 start = machine__get_running_kernel_start(machine, NULL);
 
+	/* In case of renewal the kernel map, destroy previous one */
+	machine__destroy_kernel_maps(machine);
+
 	for (type = 0; type < MAP__NR_TYPES; ++type) {
 		struct kmap *kmap;
 		struct map *map;
--
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