diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 0e77850..be9709a 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -26,6 +26,7 @@
 #include <string.h>
 #include <sys/sendfile.h>
 #include <time.h>
+#include <unistd.h>
 #include <zlib.h>
 
 #include <binder/IBinder.h>
@@ -214,6 +215,9 @@
 static const char* k_tracePath =
     "/sys/kernel/debug/tracing/trace";
 
+static const char* k_traceStreamPath =
+    "/sys/kernel/debug/tracing/trace_pipe";
+
 static const char* k_traceMarkerPath =
     "/sys/kernel/debug/tracing/trace_marker";
 
@@ -732,6 +736,31 @@
     setTracingEnabled(false);
 }
 
+// Read data from the tracing pipe and forward to stdout
+static void streamTrace()
+{
+    char trace_data[4096];
+    int traceFD = open(k_traceStreamPath, O_RDWR);
+    if (traceFD == -1) {
+        fprintf(stderr, "error opening %s: %s (%d)\n", k_traceStreamPath,
+                strerror(errno), errno);
+        return;
+    }
+    while (!g_traceAborted) {
+        ssize_t bytes_read = read(traceFD, trace_data, 4096);
+        if (bytes_read > 0) {
+            write(STDOUT_FILENO, trace_data, bytes_read);
+            fflush(stdout);
+        } else {
+            if (!g_traceAborted) {
+                fprintf(stderr, "read returned %zd bytes err %d (%s)\n",
+                        bytes_read, errno, strerror(errno));
+            }
+            break;
+        }
+    }
+}
+
 // Read the current kernel trace and write it to stdout.
 static void dumpTrace()
 {
@@ -878,6 +907,10 @@
                     "  --async_dump    dump the current contents of circular trace buffer\n"
                     "  --async_stop    stop tracing and dump the current contents of circular\n"
                     "                    trace buffer\n"
+                    "  --stream        stream trace to stdout as it enters the trace buffer\n"
+                    "                    Note: this can take significant CPU time, and is best\n"
+                    "                    used for measuring things that are not affected by\n"
+                    "                    CPU performance, like pagecache usage.\n"
                     "  --list_categories\n"
                     "                  list the available tracing categories\n"
             );
@@ -889,6 +922,7 @@
     bool traceStart = true;
     bool traceStop = true;
     bool traceDump = true;
+    bool traceStream = false;
 
     if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
         showHelp(argv[0]);
@@ -903,6 +937,7 @@
             {"async_stop",      no_argument, 0,  0 },
             {"async_dump",      no_argument, 0,  0 },
             {"list_categories", no_argument, 0,  0 },
+            {"stream",          no_argument, 0,  0 },
             {           0,                0, 0,  0 }
         };
 
@@ -969,6 +1004,9 @@
                     async = true;
                     traceStart = false;
                     traceStop = false;
+                } else if (!strcmp(long_options[option_index].name, "stream")) {
+                    traceStream = true;
+                    traceDump = false;
                 } else if (!strcmp(long_options[option_index].name, "list_categories")) {
                     listSupportedCategories();
                     exit(0);
@@ -994,8 +1032,10 @@
     ok &= startTrace();
 
     if (ok && traceStart) {
-        printf("capturing trace...");
-        fflush(stdout);
+        if (!traceStream) {
+            printf("capturing trace...");
+            fflush(stdout);
+        }
 
         // We clear the trace after starting it because tracing gets enabled for
         // each CPU individually in the kernel. Having the beginning of the trace
@@ -1005,7 +1045,7 @@
         ok = clearTrace();
 
         writeClockSyncMarker();
-        if (ok && !async) {
+        if (ok && !async && !traceStream) {
             // Sleep to allow the trace to be captured.
             struct timespec timeLeft;
             timeLeft.tv_sec = g_traceDurationSeconds;
@@ -1016,6 +1056,10 @@
                 }
             } while (nanosleep(&timeLeft, &timeLeft) == -1 && errno == EINTR);
         }
+
+        if (traceStream) {
+            streamTrace();
+        }
     }
 
     // Stop the trace and restore the default settings.
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index 61f8365..f8ea394 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -322,7 +322,7 @@
     dump_file("KERNEL SYNC", "/d/sync");
 
     run_command("PROCESSES AND THREADS", 10, "ps", "-Z", "-t", "-p", "-P", NULL);
-    run_command("LIBRANK", 10, "librank", NULL);
+    run_command("LIBRANK", 10, SU_PATH, "root", "librank", NULL);
 
     do_dmesg();
 
diff --git a/data/etc/android.hardware.type.automotive.xml b/data/etc/android.hardware.type.automotive.xml
new file mode 100644
index 0000000..a9b4b05
--- /dev/null
+++ b/data/etc/android.hardware.type.automotive.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 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.
+-->
+
+<!-- These features determine that the device running android is a car. -->
+<permissions>
+    <feature name="android.hardware.type.automotive" />
+</permissions>
diff --git a/data/etc/car_core_hardware.xml b/data/etc/car_core_hardware.xml
new file mode 100644
index 0000000..8ed8460
--- /dev/null
+++ b/data/etc/car_core_hardware.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 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.
+-->
+
+<!-- These are the hardware components that all handheld devices
+     must include. Devices with optional hardware must also include extra
+     hardware files, per the comments below.
+
+     Handheld devices include phones, mobile Internet devices (MIDs),
+     Personal Media Players (PMPs), small tablets (7" or less), and similar
+     devices.
+-->
+<permissions>
+    <feature name="android.hardware.audio.output" />
+    <feature name="android.hardware.camera" />
+    <feature name="android.hardware.location" />
+    <feature name="android.hardware.location.network" />
+    <feature name="android.hardware.sensor.compass" />
+    <feature name="android.hardware.sensor.accelerometer" />
+    <feature name="android.hardware.bluetooth" />
+    <feature name="android.hardware.touchscreen" />
+    <feature name="android.hardware.microphone" />
+    <feature name="android.hardware.screen.landscape" />
+    <!-- Feature to specify if the device is a car -->
+    <feature name="android.hardware.type.automotive" />
+
+    <!-- basic system services -->
+    <feature name="android.software.app_widgets" />
+    <feature name="android.software.connectionservice" />
+    <feature name="android.software.voice_recognizers" notLowRam="true" />
+    <feature name="android.software.backup" />
+    <feature name="android.software.home_screen" />
+    <feature name="android.software.input_methods" />
+    <feature name="android.software.print" />
+
+    <!-- Feature to specify if the device supports adding device admins. -->
+    <feature name="android.software.device_admin" />
+
+    <!-- Feature to specify if the device support managed users. -->
+    <feature name="android.software.managed_users" />
+
+    <!-- devices with GPS must include android.hardware.location.gps.xml -->
+    <!-- devices with an autofocus camera and/or flash must include either
+         android.hardware.camera.autofocus.xml or
+         android.hardware.camera.autofocus-flash.xml -->
+    <!-- devices with a front facing camera must include
+         android.hardware.camera.front.xml -->
+    <!-- devices with WiFi must also include android.hardware.wifi.xml -->
+    <!-- devices that support multitouch must include the most appropriate one
+         of these files:
+
+         If only partial (non-independent) pointers are supported:
+         android.hardware.touchscreen.multitouch.xml
+
+         If up to 4 independently tracked pointers are supported:
+         include android.hardware.touchscreen.multitouch.distinct.xml
+
+         If 5 or more independently tracked pointers are supported:
+         include android.hardware.touchscreen.multitouch.jazzhand.xml
+
+         ONLY ONE of the above should be included. -->
+    <!-- devices with an ambient light sensor must also include
+         android.hardware.sensor.light.xml -->
+    <!-- devices with a proximity sensor must also include
+         android.hardware.sensor.proximity.xml -->
+    <!-- GSM phones must also include android.hardware.telephony.gsm.xml -->
+    <!-- CDMA phones must also include android.hardware.telephony.cdma.xml -->
+    <!-- Devices that have low-latency audio stacks suitable for apps like
+         VoIP may include android.hardware.audio.low_latency.xml. ONLY apps
+         that meet the requirements specified in the CDD may include this. -->
+</permissions>
diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index b6106ba..16a4790 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -20,6 +20,7 @@
 #include <vector>
 
 #include <cutils/native_handle.h>
+#include <nativehelper/ScopedFd.h>
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
 #include <utils/String16.h>
@@ -154,6 +155,17 @@
     // will be closed once the parcel is destroyed.
     status_t            writeDupFileDescriptor(int fd);
 
+    // Place a file descriptor into the parcel.  This will not affect the
+    // semantics of the smart file descriptor. A new descriptor will be
+    // created, and will be closed when the parcel is destroyed.
+    status_t            writeUniqueFileDescriptor(
+                            const ScopedFd& fd);
+
+    // Place a vector of file desciptors into the parcel. Each descriptor is
+    // dup'd as in writeDupFileDescriptor
+    status_t            writeUniqueFileDescriptorVector(
+                            const std::vector<ScopedFd>& val);
+
     // Writes a blob to the parcel.
     // If the blob is small, then it is stored in-place, otherwise it is
     // transferred by way of an anonymous shared memory region.  Prefer sending
@@ -250,6 +262,15 @@
     // in the parcel, which you do not own -- use dup() to get your own copy.
     int                 readFileDescriptor() const;
 
+    // Retrieve a smart file descriptor from the parcel.
+    status_t            readUniqueFileDescriptor(
+                            ScopedFd* val) const;
+
+
+    // Retrieve a vector of smart file descriptors from the parcel.
+    status_t            readUniqueFileDescriptorVector(
+                            std::vector<ScopedFd>* val) const;
+
     // Reads a blob from the parcel.
     // The caller should call release() on the blob after reading its contents.
     status_t            readBlob(size_t len, ReadableBlob* outBlob) const;
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index a101d90..13ecc87 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -1006,12 +1006,20 @@
         return -errno;
     }
     status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/);
-    if (err) {
+    if (err != OK) {
         close(dupFd);
     }
     return err;
 }
 
+status_t Parcel::writeUniqueFileDescriptor(const ScopedFd& fd) {
+    return writeDupFileDescriptor(fd.get());
+}
+
+status_t Parcel::writeUniqueFileDescriptorVector(const std::vector<ScopedFd>& val) {
+    return writeTypedVector(val, &Parcel::writeUniqueFileDescriptor);
+}
+
 status_t Parcel::writeBlob(size_t len, bool mutableCopy, WritableBlob* outBlob)
 {
     if (len > INT32_MAX) {
@@ -1625,16 +1633,36 @@
 int Parcel::readFileDescriptor() const
 {
     const flat_binder_object* flat = readObject(true);
-    if (flat) {
-        switch (flat->type) {
-            case BINDER_TYPE_FD:
-                //ALOGI("Returning file descriptor %ld from parcel %p", flat->handle, this);
-                return flat->handle;
-        }
+
+    if (flat && flat->type == BINDER_TYPE_FD) {
+        return flat->handle;
     }
+
     return BAD_TYPE;
 }
 
+status_t Parcel::readUniqueFileDescriptor(ScopedFd* val) const
+{
+    int got = readFileDescriptor();
+
+    if (got == BAD_TYPE) {
+        return BAD_TYPE;
+    }
+
+    val->reset(dup(got));
+
+    if (val->get() < 0) {
+        return BAD_VALUE;
+    }
+
+    return OK;
+}
+
+
+status_t Parcel::readUniqueFileDescriptorVector(std::vector<ScopedFd>* val) const {
+    return readTypedVector(val, &Parcel::readUniqueFileDescriptor);
+}
+
 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const
 {
     int32_t blobType;