perf trace: Call machine__exit() at exit

Otherwise 'perf trace' leaves a temporary file /tmp/perf-vdso.so-XXXXXX.

  $ perf trace -o log true
  $ ls -l /tmp/perf-vdso.*
  -rw------- 1 root root 8192 Nov  8 03:08 /tmp/perf-vdso.so-5bCpD0

Signed-off-by: Andrei Vagin <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Vasily Averin <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: avagin

tools/perf/builtin-trace.c

@@ -1138,6 +1138,14 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
 	return err;
 }
 
+static void trace__symbols__exit(struct trace *trace)
+{
+	machine__exit(trace->host);
+	trace->host = NULL;
+
+	symbol__exit();
+}
+
 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
 {
 	int idx;
@@ -2481,6 +2489,8 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 	}
 
 out_delete_evlist:
+	trace__symbols__exit(trace);
+
 	perf_evlist__delete(evlist);
 	trace->evlist = NULL;
 	trace->live = false;