diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index b819797..976ba66 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -176,13 +176,41 @@
   return kUnknownBootReason;
 }
 
+// Returns the appropriate metric key prefix for the boot_complete metric such
+// that boot metrics after a system update are labeled as ota_boot_complete;
+// otherwise, they are labeled as boot_complete.  This method encapsulates the
+// bookkeeping required to track when a system update has occurred by storing
+// the UTC timestamp of the system build date and comparing against the current
+// system build date.
+std::string CalculateBootCompletePrefix() {
+  static const std::string kBuildDateKey = "build_date";
+  std::string boot_complete_prefix = "boot_complete";
+
+  std::string build_date_str = GetProperty("ro.build.date.utc");
+  int32_t build_date = std::stoi(build_date_str);
+
+  BootEventRecordStore boot_event_store;
+  BootEventRecordStore::BootEventRecord record;
+  if (!boot_event_store.GetBootEvent(kBuildDateKey, &record) ||
+      build_date != record.second) {
+    boot_complete_prefix = "ota_" + boot_complete_prefix;
+    boot_event_store.AddBootEventWithValue(kBuildDateKey, build_date);
+  }
+
+  return boot_complete_prefix;
+}
+
 // Records several metrics related to the time it takes to boot the device,
 // including disambiguating boot time on encrypted or non-encrypted devices.
 void RecordBootComplete() {
   BootEventRecordStore boot_event_store;
+  BootEventRecordStore::BootEventRecord record;
   time_t uptime = bootstat::ParseUptime();
 
-  BootEventRecordStore::BootEventRecord record;
+  // The boot_complete metric has two variants: boot_complete and
+  // ota_boot_complete.  The latter signifies that the device is booting after
+  // a system update.
+  std::string boot_complete_prefix = CalculateBootCompletePrefix();
 
   // post_decrypt_time_elapsed is only logged on encrypted devices.
   if (boot_event_store.GetBootEvent("post_decrypt_time_elapsed", &record)) {
@@ -193,18 +221,18 @@
 
     // Subtract the decryption time to normalize the boot cycle timing.
     time_t boot_complete = uptime - record.second;
-    boot_event_store.AddBootEventWithValue("boot_complete_post_decrypt",
+    boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_post_decrypt",
                                            boot_complete);
 
 
   } else {
-    boot_event_store.AddBootEventWithValue("boot_complete_no_encryption",
+    boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_no_encryption",
                                            uptime);
   }
 
   // Record the total time from device startup to boot complete, regardless of
   // encryption state.
-  boot_event_store.AddBootEventWithValue("boot_complete", uptime);
+  boot_event_store.AddBootEventWithValue(boot_complete_prefix, uptime);
 }
 
 // Records the boot_reason metric by querying the ro.boot.bootreason system
diff --git a/liblog/logprint.c b/liblog/logprint.c
index 9b60d4a..88afc14 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -21,6 +21,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
+#include <pwd.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -28,11 +29,11 @@
 #include <string.h>
 #include <inttypes.h>
 #include <sys/param.h>
+#include <sys/types.h>
 
 #include <cutils/list.h>
 #include <log/logd.h>
 #include <log/logprint.h>
-#include <private/android_filesystem_config.h>
 
 #include "log_portability.h"
 
@@ -1352,17 +1353,17 @@
     uid[0] = '\0';
     if (p_format->uid_output) {
         if (entry->uid >= 0) {
-            const struct android_id_info *info = android_ids;
-            size_t i;
 
-            for (i = 0; i < android_id_count; ++i) {
-                if (info->aid == (unsigned int)entry->uid) {
-                    break;
-                }
-                ++info;
-            }
-            if ((i < android_id_count) && (strlen(info->name) <= 5)) {
-                 snprintf(uid, sizeof(uid), "%5s:", info->name);
+            /*
+             * This code is Android specific, bionic guarantees that
+             * calls to non-reentrant getpwuid() are thread safe.
+             */
+#ifndef __BIONIC__
+#warning "This code assumes that getpwuid is thread safe, only true with Bionic!"
+#endif
+            struct passwd* pwd = getpwuid(entry->uid);
+            if (pwd && (strlen(pwd->pw_name) <= 5)) {
+                 snprintf(uid, sizeof(uid), "%5s:", pwd->pw_name);
             } else {
                  // Not worth parsing package list, names all longer than 5
                  snprintf(uid, sizeof(uid), "%5d:", entry->uid);
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 899c98c..f0360db 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -36,7 +36,8 @@
 namespace android {
 
 #if defined(__ANDROID__)
-static constexpr const char* kPublicNativeLibrariesConfig = "/system/etc/public.libraries.txt";
+static constexpr const char* kPublicNativeLibrariesSystemConfig = "/system/etc/public.libraries.txt";
+static constexpr const char* kPublicNativeLibrariesVendorConfig = "/vendor/etc/public.libraries.txt";
 
 class LibraryNamespaces {
  public:
@@ -93,35 +94,51 @@
   }
 
   void Initialize() {
+    std::vector<std::string> sonames;
+
+    LOG_ALWAYS_FATAL_IF(!ReadConfig(kPublicNativeLibrariesSystemConfig, &sonames),
+                        "Error reading public native library list from \"%s\": %s",
+                        kPublicNativeLibrariesSystemConfig, strerror(errno));
+    // This file is optional, quietly ignore if the file does not exist.
+    ReadConfig(kPublicNativeLibrariesVendorConfig, &sonames);
+
+    // android_init_namespaces() expects all the public libraries
+    // to be loaded so that they can be found by soname alone.
+    //
+    // TODO(dimitry): this is a bit misleading since we do not know
+    // if the vendor public library is going to be opened from /vendor/lib
+    // we might as well end up loading them from /system/lib
+    // For now we rely on CTS test to catch things like this but
+    // it should probably be addressed in the future.
+    for (const auto& soname : sonames) {
+      dlopen(soname.c_str(), RTLD_NOW | RTLD_NODELETE);
+    }
+
+    public_libraries_ = base::Join(sonames, ':');
+  }
+
+ private:
+  bool ReadConfig(const std::string& configFile, std::vector<std::string>* sonames) {
     // Read list of public native libraries from the config file.
     std::string file_content;
-    LOG_ALWAYS_FATAL_IF(!base::ReadFileToString(kPublicNativeLibrariesConfig, &file_content),
-                        "Error reading public native library list from \"%s\": %s",
-                        kPublicNativeLibrariesConfig, strerror(errno));
+    if(!base::ReadFileToString(configFile, &file_content)) {
+      return false;
+    }
 
     std::vector<std::string> lines = base::Split(file_content, "\n");
 
-    std::vector<std::string> sonames;
-
     for (const auto& line : lines) {
       auto trimmed_line = base::Trim(line);
       if (trimmed_line[0] == '#' || trimmed_line.empty()) {
         continue;
       }
 
-      sonames.push_back(trimmed_line);
+      sonames->push_back(trimmed_line);
     }
 
-    public_libraries_ = base::Join(sonames, ':');
-
-    // android_init_namespaces() expects all the public libraries
-    // to be loaded so that they can be found by soname alone.
-    for (const auto& soname : sonames) {
-      dlopen(soname.c_str(), RTLD_NOW | RTLD_NODELETE);
-    }
+    return true;
   }
 
- private:
   bool InitPublicNamespace(const char* library_path) {
     // (http://b/25844435) - Some apps call dlopen from generated code (mono jited
     // code is one example) unknown to linker in which  case linker uses anonymous
diff --git a/libutils/SystemClock.cpp b/libutils/SystemClock.cpp
index 1fca2b2..c5ae327 100644
--- a/libutils/SystemClock.cpp
+++ b/libutils/SystemClock.cpp
@@ -56,66 +56,12 @@
 	return nanoseconds_to_milliseconds(elapsedRealtimeNano());
 }
 
-#define METHOD_CLOCK_GETTIME    0
-#define METHOD_IOCTL            1
-#define METHOD_SYSTEMTIME       2
-
-/*
- * To debug/verify the timestamps returned by the kernel, change
- * DEBUG_TIMESTAMP to 1 and call the timestamp routine from a single thread
- * in the test program. b/10899829
- */
-#define DEBUG_TIMESTAMP         0
-
-#if DEBUG_TIMESTAMP && defined(__arm__)
-static inline void checkTimeStamps(int64_t timestamp,
-                                   int64_t volatile *prevTimestampPtr,
-                                   int volatile *prevMethodPtr,
-                                   int curMethod)
-{
-    /*
-     * Disable the check for SDK since the prebuilt toolchain doesn't contain
-     * gettid, and int64_t is different on the ARM platform
-     * (ie long vs long long).
-     */
-    int64_t prevTimestamp = *prevTimestampPtr;
-    int prevMethod = *prevMethodPtr;
-
-    if (timestamp < prevTimestamp) {
-        static const char *gettime_method_names[] = {
-            "clock_gettime",
-            "ioctl",
-            "systemTime",
-        };
-
-        ALOGW("time going backwards: prev %lld(%s) vs now %lld(%s), tid=%d",
-              prevTimestamp, gettime_method_names[prevMethod],
-              timestamp, gettime_method_names[curMethod],
-              gettid());
-    }
-    // NOTE - not atomic and may generate spurious warnings if the 64-bit
-    // write is interrupted or not observed as a whole.
-    *prevTimestampPtr = timestamp;
-    *prevMethodPtr = curMethod;
-}
-#else
-#define checkTimeStamps(timestamp, prevTimestampPtr, prevMethodPtr, curMethod)
-#endif
-
 /*
  * native public static long elapsedRealtimeNano();
  */
 int64_t elapsedRealtimeNano()
 {
 #if defined(__ANDROID__)
-    struct timespec ts;
-    int result;
-    int64_t timestamp;
-#if DEBUG_TIMESTAMP
-    static volatile int64_t prevTimestamp;
-    static volatile int prevMethod;
-#endif
-
     static int s_fd = -1;
 
     if (s_fd == -1) {
@@ -125,31 +71,20 @@
         }
     }
 
-    result = ioctl(s_fd,
-            ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), &ts);
-
-    if (result == 0) {
-        timestamp = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
-        checkTimeStamps(timestamp, &prevTimestamp, &prevMethod, METHOD_IOCTL);
-        return timestamp;
+    struct timespec ts;
+    if (ioctl(s_fd, ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), &ts) == 0) {
+        return seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
     }
 
     // /dev/alarm doesn't exist, fallback to CLOCK_BOOTTIME
-    result = clock_gettime(CLOCK_BOOTTIME, &ts);
-    if (result == 0) {
-        timestamp = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
-        checkTimeStamps(timestamp, &prevTimestamp, &prevMethod,
-                        METHOD_CLOCK_GETTIME);
-        return timestamp;
+    if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0) {
+        return seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
     }
 
     // XXX: there was an error, probably because the driver didn't
     // exist ... this should return
     // a real error, like an exception!
-    timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
-    checkTimeStamps(timestamp, &prevTimestamp, &prevMethod,
-                    METHOD_SYSTEMTIME);
-    return timestamp;
+    return systemTime(SYSTEM_TIME_MONOTONIC);
 #else
     return systemTime(SYSTEM_TIME_MONOTONIC);
 #endif