5 files changed, 37 insertions, 13 deletions

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index a25f3ee1b5b3..65269b8ac186 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -8,6 +8,7 @@
 #include "sort.h"
 #include "strlist.h"
 #include "thread.h"
+#include "vdso.h"
 #include <stdbool.h>
 #include <symbol/kallsyms.h>
 #include "unwind.h"
@@ -23,6 +24,8 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
         INIT_LIST_HEAD(&machine->dead_threads);
         machine->last_match = NULL;
 
+        machine->vdso_info = NULL;
+
         machine->kmaps.machine = machine;
         machine->pid = pid;
 
@@ -105,6 +108,7 @@ void machine__exit(struct machine *machine)
         map_groups__exit(&machine->kmaps);
         dsos__delete(&machine->user_dsos);
         dsos__delete(&machine->kernel_dsos);
+        vdso__exit(machine);
         zfree(&machine->root_dir);
         zfree(&machine->current_tid);
 }
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 8771d0cbe9cb..b972824e6294 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -20,6 +20,8 @@ union perf_event;
 
 extern const char *ref_reloc_sym_names[];
 
+struct vdso_info;
+
 struct machine {
         struct rb_node    rb_node;
         pid_t             pid;
@@ -28,6 +30,7 @@ struct machine {
         struct rb_root    threads;
         struct list_head  dead_threads;
         struct thread     *last_match;
+        struct vdso_info  *vdso_info;
         struct list_head  user_dsos;
         struct list_head  kernel_dsos;
         struct map_groups kmaps;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index d3da1055239f..fab5838c06be 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -14,7 +14,6 @@
 #include "util.h"
 #include "cpumap.h"
 #include "perf_regs.h"
-#include "vdso.h"
 
 static int perf_session__open(struct perf_session *session)
 {
@@ -156,7 +155,6 @@ void perf_session__delete(struct perf_session *session)
         if (session->file)
                 perf_data_file__close(session->file);
         free(session);
-        vdso__exit();
 }
 
 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 75245f081b60..fdaccaf67371 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -28,14 +28,17 @@ struct vdso_info {
         struct vdso_file vdso;
 };
 
-static struct vdso_info vdso_info_ = {
-        .vdso = {
-                .temp_file_name = VDSO__TEMP_FILE_NAME,
-                .dso_name = VDSO__MAP_NAME,
-        },
-};
-
-static struct vdso_info *vdso_info = &vdso_info_;
+static struct vdso_info *vdso_info__new(void)
+{
+        static const struct vdso_info vdso_info_init = {
+                .vdso    = {
+                        .temp_file_name = VDSO__TEMP_FILE_NAME,
+                        .dso_name = VDSO__MAP_NAME,
+                },
+        };
+
+        return memdup(&vdso_info_init, sizeof(vdso_info_init));
+}
 
 static int find_vdso_map(void **start, void **end)
 {
@@ -105,16 +108,32 @@ static char *get_file(struct vdso_file *vdso_file)
         return vdso;
 }
 
-void vdso__exit(void)
+void vdso__exit(struct machine *machine)
 {
+        struct vdso_info *vdso_info = machine->vdso_info;
+
+        if (!vdso_info)
+                return;
+
         if (vdso_info->vdso.found)
                 unlink(vdso_info->vdso.temp_file_name);
+
+        zfree(&machine->vdso_info);
 }
 
 struct dso *vdso__dso_findnew(struct machine *machine)
 {
-        struct dso *dso = dsos__find(&machine->user_dsos, VDSO__MAP_NAME, true);
+        struct vdso_info *vdso_info;
+        struct dso *dso;
+
+        if (!machine->vdso_info)
+                machine->vdso_info = vdso_info__new();
+
+        vdso_info = machine->vdso_info;
+        if (!vdso_info)
+                return NULL;
 
+        dso = dsos__find(&machine->user_dsos, VDSO__MAP_NAME, true);
         if (!dso) {
                 char *file;
 
diff --git a/tools/perf/util/vdso.h b/tools/perf/util/vdso.h
index 9ab0738b6752..7cf1576863a4 100644
--- a/tools/perf/util/vdso.h
+++ b/tools/perf/util/vdso.h
@@ -15,6 +15,6 @@ static inline bool is_vdso_map(const char *filename)
 struct machine;
 
 struct dso *vdso__dso_findnew(struct machine *machine);
-void vdso__exit(void);
+void vdso__exit(struct machine *machine);
 
 #endif /* __PERF_VDSO__ */