libmemunreachable: track kernel binder references
The kernel can hold references to binder objects that have no userspace
references. Allow libmemunreachable to call into libbinder and
libhwbinder to get lists of kernel references. Use undefined weak
symbols so that libmemunreachable will continue to work in processes
that do not have libbinder.
Test: memunreachable_binder_test
Bug: 28275695
Change-Id: I9eae73f2a51a49a7025ffe6309ccdc2693a2391b
diff --git a/libmemunreachable/Binder.h b/libmemunreachable/Binder.h
new file mode 100644
index 0000000..bf4fd3e
--- /dev/null
+++ b/libmemunreachable/Binder.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LIBMEMUNREACHABLE_BINDER_H_
+#define LIBMEMUNREACHABLE_BINDER_H_
+
+#include "Allocator.h"
+
+namespace android {
+
+bool BinderReferences(allocator::vector<uintptr_t>& refs);
+
+} // namespace android
+
+#endif // LIBMEMUNREACHABLE_BINDER_H_