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-rw-r--r--tools/lib/lockdep/common.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/lib/lockdep/common.c b/tools/lib/lockdep/common.c
new file mode 100644
index 000000000..8ef602f18
--- /dev/null
+++ b/tools/lib/lockdep/common.c
@@ -0,0 +1,33 @@
+#include <stddef.h>
+#include <stdbool.h>
+#include <linux/compiler.h>
+#include <linux/lockdep.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+static __thread struct task_struct current_obj;
+
+/* lockdep wants these */
+bool debug_locks = true;
+bool debug_locks_silent;
+
+__attribute__((constructor)) static void liblockdep_init(void)
+{
+ lockdep_init();
+}
+
+__attribute__((destructor)) static void liblockdep_exit(void)
+{
+ debug_check_no_locks_held(&current_obj);
+}
+
+struct task_struct *__curr(void)
+{
+ if (current_obj.pid == 0) {
+ /* Makes lockdep output pretty */
+ prctl(PR_GET_NAME, current_obj.comm);
+ current_obj.pid = syscall(__NR_gettid);
+ }
+
+ return &current_obj;
+}