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Diffstat (limited to 'tools/perf/util/vdso.c')
-rw-r--r--tools/perf/util/vdso.c44
1 files changed, 32 insertions, 12 deletions
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index da5ba4da2bd2..75245f081b60 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -15,8 +15,27 @@
#include "linux/string.h"
#include "debug.h"
-static bool vdso_found;
-static char vdso_file[] = "/tmp/perf-vdso.so-XXXXXX";
+#define VDSO__TEMP_FILE_NAME "/tmp/perf-vdso.so-XXXXXX"
+
+struct vdso_file {
+ bool found;
+ bool error;
+ char temp_file_name[sizeof(VDSO__TEMP_FILE_NAME)];
+ const char *dso_name;
+};
+
+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 int find_vdso_map(void **start, void **end)
{
@@ -49,7 +68,7 @@ static int find_vdso_map(void **start, void **end)
return !found;
}
-static char *get_file(void)
+static char *get_file(struct vdso_file *vdso_file)
{
char *vdso = NULL;
char *buf = NULL;
@@ -57,10 +76,10 @@ static char *get_file(void)
size_t size;
int fd;
- if (vdso_found)
- return vdso_file;
+ if (vdso_file->found)
+ return vdso_file->temp_file_name;
- if (find_vdso_map(&start, &end))
+ if (vdso_file->error || find_vdso_map(&start, &end))
return NULL;
size = end - start;
@@ -69,26 +88,27 @@ static char *get_file(void)
if (!buf)
return NULL;
- fd = mkstemp(vdso_file);
+ fd = mkstemp(vdso_file->temp_file_name);
if (fd < 0)
goto out;
if (size == (size_t) write(fd, buf, size))
- vdso = vdso_file;
+ vdso = vdso_file->temp_file_name;
close(fd);
out:
free(buf);
- vdso_found = (vdso != NULL);
+ vdso_file->found = (vdso != NULL);
+ vdso_file->error = !vdso_file->found;
return vdso;
}
void vdso__exit(void)
{
- if (vdso_found)
- unlink(vdso_file);
+ if (vdso_info->vdso.found)
+ unlink(vdso_info->vdso.temp_file_name);
}
struct dso *vdso__dso_findnew(struct machine *machine)
@@ -98,7 +118,7 @@ struct dso *vdso__dso_findnew(struct machine *machine)
if (!dso) {
char *file;
- file = get_file();
+ file = get_file(&vdso_info->vdso);
if (!file)
return NULL;