Clean up various warnings in bionic.
Change-Id: Ic57541d0a567fd4ae79f0ad59b2ffde1130eb7d2
diff --git a/libc/bionic/__bionic_name_mem.cpp b/libc/bionic/__bionic_name_mem.cpp
new file mode 100644
index 0000000..72a1d1e
--- /dev/null
+++ b/libc/bionic/__bionic_name_mem.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "private/bionic_name_mem.h"
+
+#include <sys/prctl.h>
+
+// Local definitions of custom prctl arguments to set a vma name in some kernels.
+#define BIONIC_PR_SET_VMA 0x53564d41
+#define BIONIC_PR_SET_VMA_ANON_NAME 0
+
+// Names a region of memory. The name is expected to show up in /proc/pid/maps
+// and /proc/pid/smaps. There is no guarantee that it will work, and if it
+// does work it is likely to only work on memory that was allocated with
+// mmap(MAP_ANONYMOUS), and only on regions that are page aligned. name should
+// be a pointer to a string that is valid for as long as the memory is mapped,
+// preferably a compile-time constant string.
+//
+// Returns -1 on error and sets errno. If it returns an error naming page
+// aligned anonymous memory the kernel doesn't support naming, and an alternate
+// method of naming memory should be used (like ashmem).
+
+int __bionic_name_mem(void* addr, size_t len, const char* name) {
+ return prctl(BIONIC_PR_SET_VMA, BIONIC_PR_SET_VMA_ANON_NAME, addr, len, name);
+}