diff --git a/libc/private/bionic_fdtrack.h b/libc/private/bionic_fdtrack.h
new file mode 100644
index 0000000..ddf7249
--- /dev/null
+++ b/libc/private/bionic_fdtrack.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <sys/cdefs.h>
+#include <stdatomic.h>
+
+#include <android/fdtrack.h>
+
+#include "bionic/pthread_internal.h"
+#include "private/bionic_tls.h"
+#include "private/ErrnoRestorer.h"
+
+extern "C" _Atomic(android_fdtrack_hook_t) __android_fdtrack_hook;
+
+// Macro to record file descriptor creation.
+// e.g.:
+//   int socket(int domain, int type, int protocol) {
+//     return FDTRACK_CREATE_NAME("socket", __socket(domain, type, protocol));
+//   }
+#define FDTRACK_CREATE_NAME(name, fd_value)                       \
+  ({                                                              \
+    int __fd = (fd_value);                                        \
+    if (__fd != -1 && __predict_false(__android_fdtrack_hook)) {  \
+      bionic_tls& tls = __get_bionic_tls();                       \
+      /* fdtrack_disabled is only true during reentrant calls. */ \
+      if (!__predict_false(tls.fdtrack_disabled)) {               \
+        ErrnoRestorer r;                                          \
+        tls.fdtrack_disabled = true;                              \
+        android_fdtrack_event event;                              \
+        event.fd = __fd;                                          \
+        event.type = ANDROID_FDTRACK_EVENT_TYPE_CREATE;           \
+        event.data.create.function_name = name;                   \
+        __android_fdtrack_hook(&event);                           \
+        tls.fdtrack_disabled = false;                             \
+      }                                                           \
+    }                                                             \
+    __fd;                                                         \
+  })
+
+// Macro to record file descriptor creation, with the current function's name.
+// e.g.:
+//   int socket(int domain, int type, int protocol) {
+//     return FDTRACK_CREATE_NAME(__socket(domain, type, protocol));
+//   }
+#define FDTRACK_CREATE(fd_value) FDTRACK_CREATE_NAME(__func__, (fd_value))
+
+// Macro to record file descriptor closure.
+// Note that this does not actually close the file descriptor.
+#define FDTRACK_CLOSE(fd_value)                                  \
+  ({                                                             \
+    int __fd = (fd_value);                                       \
+    if (__fd != -1 && __predict_false(__android_fdtrack_hook)) { \
+      bionic_tls& tls = __get_bionic_tls();                      \
+      if (!__predict_false(tls.fdtrack_disabled)) {              \
+        int saved_errno = errno;                                 \
+        tls.fdtrack_disabled = true;                             \
+        android_fdtrack_event event;                             \
+        event.fd = __fd;                                         \
+        event.type = ANDROID_FDTRACK_EVENT_TYPE_CLOSE;           \
+        __android_fdtrack_hook(&event);                          \
+        tls.fdtrack_disabled = false;                            \
+        errno = saved_errno;                                     \
+      }                                                          \
+    }                                                            \
+    __fd;                                                        \
+  })