diff --git a/adb/adb_utils.cpp b/adb/adb_utils.cpp
index 7afa616..7058acb 100644
--- a/adb/adb_utils.cpp
+++ b/adb/adb_utils.cpp
@@ -19,16 +19,15 @@
 #include "adb_utils.h"
 #include "adb_unique_fd.h"
 
-#include <libgen.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include <algorithm>
-#include <mutex>
 #include <vector>
 
+#include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/parseint.h>
 #include <android-base/stringprintf.h>
@@ -100,52 +99,6 @@
   return result;
 }
 
-std::string adb_basename(const std::string& path) {
-  static std::mutex& basename_lock = *new std::mutex();
-
-  // Copy path because basename may modify the string passed in.
-  std::string result(path);
-
-  // Use lock because basename() may write to a process global and return a
-  // pointer to that. Note that this locking strategy only works if all other
-  // callers to basename in the process also grab this same lock.
-  std::lock_guard<std::mutex> lock(basename_lock);
-
-  // Note that if std::string uses copy-on-write strings, &str[0] will cause
-  // the copy to be made, so there is no chance of us accidentally writing to
-  // the storage for 'path'.
-  char* name = basename(&result[0]);
-
-  // In case dirname returned a pointer to a process global, copy that string
-  // before leaving the lock.
-  result.assign(name);
-
-  return result;
-}
-
-std::string adb_dirname(const std::string& path) {
-  static std::mutex& dirname_lock = *new std::mutex();
-
-  // Copy path because dirname may modify the string passed in.
-  std::string result(path);
-
-  // Use lock because dirname() may write to a process global and return a
-  // pointer to that. Note that this locking strategy only works if all other
-  // callers to dirname in the process also grab this same lock.
-  std::lock_guard<std::mutex> lock(dirname_lock);
-
-  // Note that if std::string uses copy-on-write strings, &str[0] will cause
-  // the copy to be made, so there is no chance of us accidentally writing to
-  // the storage for 'path'.
-  char* parent = dirname(&result[0]);
-
-  // In case dirname returned a pointer to a process global, copy that string
-  // before leaving the lock.
-  result.assign(parent);
-
-  return result;
-}
-
 // Given a relative or absolute filepath, create the directory hierarchy
 // as needed. Returns true if the hierarchy is/was setup.
 bool mkdirs(const std::string& path) {
@@ -171,7 +124,7 @@
     return true;
   }
 
-  const std::string parent(adb_dirname(path));
+  const std::string parent(android::base::Dirname(path));
 
   // If dirname returned the same path as what we passed in, don't go recursive.
   // This can happen on Windows when walking up the directory hierarchy and not
diff --git a/adb/adb_utils.h b/adb/adb_utils.h
index 2b59034..e0ad103 100644
--- a/adb/adb_utils.h
+++ b/adb/adb_utils.h
@@ -28,11 +28,6 @@
 bool getcwd(std::string* cwd);
 bool directory_exists(const std::string& path);
 
-// Like the regular basename and dirname, but thread-safe on all
-// platforms and capable of correctly handling exotic Windows paths.
-std::string adb_basename(const std::string& path);
-std::string adb_dirname(const std::string& path);
-
 // Return the user's home directory.
 std::string adb_get_homedir_path();
 
diff --git a/adb/adb_utils_test.cpp b/adb/adb_utils_test.cpp
index 4cac485..a3bc445 100644
--- a/adb/adb_utils_test.cpp
+++ b/adb/adb_utils_test.cpp
@@ -109,18 +109,6 @@
   ASSERT_EQ(R"('abc)')", escape_arg("abc)"));
 }
 
-TEST(adb_utils, adb_basename) {
-  EXPECT_EQ("sh", adb_basename("/system/bin/sh"));
-  EXPECT_EQ("sh", adb_basename("sh"));
-  EXPECT_EQ("sh", adb_basename("/system/bin/sh/"));
-}
-
-TEST(adb_utils, adb_dirname) {
-  EXPECT_EQ("/system/bin", adb_dirname("/system/bin/sh"));
-  EXPECT_EQ(".", adb_dirname("sh"));
-  EXPECT_EQ("/system/bin", adb_dirname("/system/bin/sh/"));
-}
-
 void test_mkdirs(const std::string& basepath) {
   // Test creating a directory hierarchy.
   ASSERT_TRUE(mkdirs(basepath));
diff --git a/adb/bugreport.cpp b/adb/bugreport.cpp
index b7e76a6..a5c312b 100644
--- a/adb/bugreport.cpp
+++ b/adb/bugreport.cpp
@@ -21,6 +21,7 @@
 #include <string>
 #include <vector>
 
+#include <android-base/file.h>
 #include <android-base/strings.h>
 
 #include "sysdeps.h"
@@ -113,14 +114,14 @@
 
   private:
     void SetLineMessage(const std::string& action) {
-        line_message_ = action + " " + adb_basename(dest_file_);
+        line_message_ = action + " " + android::base::Basename(dest_file_);
     }
 
     void SetSrcFile(const std::string path) {
         src_file_ = path;
         if (!dest_dir_.empty()) {
             // Only uses device-provided name when user passed a directory.
-            dest_file_ = adb_basename(path);
+            dest_file_ = android::base::Basename(path);
             SetLineMessage("generating");
         }
     }
diff --git a/adb/commandline.cpp b/adb/commandline.cpp
index 5a2206f..3de7be6 100644
--- a/adb/commandline.cpp
+++ b/adb/commandline.cpp
@@ -2115,7 +2115,8 @@
 
         std::string cmd = android::base::StringPrintf(
                 "%s install-write -S %" PRIu64 " %d %d_%s -",
-                install_cmd.c_str(), static_cast<uint64_t>(sb.st_size), session_id, i, adb_basename(file).c_str());
+                install_cmd.c_str(), static_cast<uint64_t>(sb.st_size), session_id, i,
+                android::base::Basename(file).c_str());
 
         int localFd = adb_open(file, O_RDONLY);
         if (localFd < 0) {
@@ -2233,7 +2234,7 @@
     int result = -1;
     std::vector<const char*> apk_file = {argv[last_apk]};
     std::string apk_dest = android::base::StringPrintf(
-        where, adb_basename(argv[last_apk]).c_str());
+        where, android::base::Basename(argv[last_apk]).c_str());
     if (!do_sync_push(apk_file, apk_dest.c_str())) goto cleanup_apk;
     argv[last_apk] = apk_dest.c_str(); /* destination name, not source location */
     result = pm_command(transport, serial, argc, argv);
diff --git a/adb/file_sync_client.cpp b/adb/file_sync_client.cpp
index 271943d..22bd2f2 100644
--- a/adb/file_sync_client.cpp
+++ b/adb/file_sync_client.cpp
@@ -844,7 +844,8 @@
         // TODO(b/25566053): Make pushing empty directories work.
         // TODO(b/25457350): We don't preserve permissions on directories.
         sc.Warning("skipping empty directory '%s'", lpath.c_str());
-        copyinfo ci(adb_dirname(lpath), adb_dirname(rpath), adb_basename(lpath), S_IFDIR);
+        copyinfo ci(android::base::Dirname(lpath), android::base::Dirname(rpath),
+                    android::base::Basename(lpath), S_IFDIR);
         ci.skip = true;
         file_list->push_back(ci);
         return true;
@@ -977,7 +978,7 @@
                 if (dst_dir.back() != '/') {
                     dst_dir.push_back('/');
                 }
-                dst_dir.append(adb_basename(src_path));
+                dst_dir.append(android::base::Basename(src_path));
             }
 
             success &= copy_local_dir_remote(sc, src_path, dst_dir.c_str(), false, false);
@@ -995,7 +996,7 @@
             if (path_holder.back() != '/') {
                 path_holder.push_back('/');
             }
-            path_holder += adb_basename(src_path);
+            path_holder += android::base::Basename(src_path);
             dst_path = path_holder.c_str();
         }
 
@@ -1015,7 +1016,8 @@
     std::vector<copyinfo> linklist;
 
     // Add an entry for the current directory to ensure it gets created before pulling its contents.
-    copyinfo ci(adb_dirname(lpath), adb_dirname(rpath), adb_basename(lpath), S_IFDIR);
+    copyinfo ci(android::base::Dirname(lpath), android::base::Dirname(rpath),
+                android::base::Basename(lpath), S_IFDIR);
     file_list->push_back(ci);
 
     // Put the files/dirs in rpath on the lists.
@@ -1149,7 +1151,7 @@
         if (srcs.size() == 1 && errno == ENOENT) {
             // However, its parent must exist.
             struct stat parent_st;
-            if (stat(adb_dirname(dst).c_str(), &parent_st) == -1) {
+            if (stat(android::base::Dirname(dst).c_str(), &parent_st) == -1) {
                 sc.Error("cannot create file/directory '%s': %s", dst, strerror(errno));
                 return false;
             }
@@ -1204,7 +1206,7 @@
                 if (!adb_is_separator(dst_dir.back())) {
                     dst_dir.push_back(OS_PATH_SEPARATOR);
                 }
-                dst_dir.append(adb_basename(src_path));
+                dst_dir.append(android::base::Basename(src_path));
             }
 
             success &= copy_remote_dir_local(sc, src_path, dst_dir.c_str(), copy_attrs);
@@ -1220,7 +1222,7 @@
             // really want to copy to local_dir + OS_PATH_SEPARATOR +
             // basename(remote).
             path_holder = android::base::StringPrintf("%s%c%s", dst_path, OS_PATH_SEPARATOR,
-                                                      adb_basename(src_path).c_str());
+                                                      android::base::Basename(src_path).c_str());
             dst_path = path_holder.c_str();
         }
 
diff --git a/adb/file_sync_service.cpp b/adb/file_sync_service.cpp
index e667bf8..2acf661 100644
--- a/adb/file_sync_service.cpp
+++ b/adb/file_sync_service.cpp
@@ -31,6 +31,7 @@
 #include <unistd.h>
 #include <utime.h>
 
+#include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <private/android_filesystem_config.h>
@@ -206,7 +207,7 @@
 
     int fd = adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode);
     if (fd < 0 && errno == ENOENT) {
-        if (!secure_mkdirs(adb_dirname(path))) {
+        if (!secure_mkdirs(android::base::Dirname(path))) {
             SendSyncFailErrno(s, "secure_mkdirs failed");
             goto fail;
         }
@@ -333,7 +334,7 @@
 
     ret = symlink(&buffer[0], path.c_str());
     if (ret && errno == ENOENT) {
-        if (!secure_mkdirs(adb_dirname(path))) {
+        if (!secure_mkdirs(android::base::Dirname(path))) {
             SendSyncFailErrno(s, "secure_mkdirs failed");
             return false;
         }
diff --git a/adb/transport_usb.cpp b/adb/transport_usb.cpp
index e16cf12..516b4f2 100644
--- a/adb/transport_usb.cpp
+++ b/adb/transport_usb.cpp
@@ -102,7 +102,7 @@
 #if defined(_WIN32) || !ADB_HOST
     return false;
 #else
-    static bool enable = getenv("ADB_LIBUSB") && strcmp(getenv("ADB_LIBUSB"), "1") == 0;
-    return enable;
+    static bool disable = getenv("ADB_LIBUSB") && strcmp(getenv("ADB_LIBUSB"), "0") == 0;
+    return !disable;
 #endif
 }
diff --git a/adf/libadfhwc/adfhwc.cpp b/adf/libadfhwc/adfhwc.cpp
index a97862a..63c0f75 100644
--- a/adf/libadfhwc/adfhwc.cpp
+++ b/adf/libadfhwc/adfhwc.cpp
@@ -166,6 +166,71 @@
     return 0;
 }
 
+static int32_t adf_display_attribute_hwc2(const adf_interface_data &data,
+        const drm_mode_modeinfo &mode, const uint32_t attribute)
+{
+    switch (attribute) {
+    case HWC2_ATTRIBUTE_VSYNC_PERIOD:
+        if (mode.vrefresh)
+            return 1000000000 / mode.vrefresh;
+        return 0;
+
+    case HWC2_ATTRIBUTE_WIDTH:
+        return mode.hdisplay;
+
+    case HWC2_ATTRIBUTE_HEIGHT:
+        return mode.vdisplay;
+
+    case HWC2_ATTRIBUTE_DPI_X:
+        return dpi(mode.hdisplay, data.width_mm);
+
+    case HWC2_ATTRIBUTE_DPI_Y:
+        return dpi(mode.vdisplay, data.height_mm);
+
+    default:
+        ALOGE("unknown display attribute %u", attribute);
+        return -EINVAL;
+    }
+}
+
+int adf_getDisplayAttributes_hwc2(struct adf_hwc_helper *dev, int disp,
+        uint32_t config, const uint32_t *attributes, int32_t *values)
+{
+    if ((size_t)disp >= dev->intf_fds.size())
+        return -EINVAL;
+
+    if (config >= dev->display_configs.size())
+        return -EINVAL;
+
+    adf_interface_data data;
+    int err = adf_get_interface_data(dev->intf_fds[disp], &data);
+    if (err < 0) {
+        ALOGE("failed to get ADF interface data: %s", strerror(err));
+        return err;
+    }
+
+    for (int i = 0; attributes[i] != HWC2_ATTRIBUTE_INVALID; i++)
+        values[i] = adf_display_attribute_hwc2(data,
+                dev->display_configs[config], attributes[i]);
+
+    adf_free_interface_data(&data);
+    return 0;
+}
+
+int adf_set_active_config_hwc2(struct adf_hwc_helper *dev, int disp,
+        uint32_t config)
+{
+    if ((size_t)disp >= dev->intf_fds.size())
+        return -EINVAL;
+
+    if (config >= dev->display_configs.size())
+        return -EINVAL;
+
+    struct drm_mode_modeinfo mode = dev->display_configs[config];
+
+    return adf_interface_set_mode(dev->intf_fds[disp], &mode);
+}
+
 static void handle_adf_event(struct adf_hwc_helper *dev, int disp)
 {
     adf_event *event;
@@ -208,28 +273,39 @@
 
     setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
 
-    pollfd *fds = new pollfd[dev->intf_fds.size()];
+    struct sigaction action = { };
+    sigemptyset(&action.sa_mask);
+    action.sa_flags = 0;
+    action.sa_handler = [](int) { pthread_exit(0); };
+
+    if (sigaction(SIGUSR2, &action, NULL) < 0) {
+        ALOGE("failed to set thread exit action %s", strerror(errno));
+        return NULL;
+    }
+
+    sigset_t signal_set;
+    sigemptyset(&signal_set);
+    sigaddset(&signal_set, SIGUSR2);
+
+    pthread_sigmask(SIG_UNBLOCK, &signal_set, NULL);
+
+    pollfd fds[dev->intf_fds.size()];
     for (size_t i = 0; i < dev->intf_fds.size(); i++) {
         fds[i].fd = dev->intf_fds[i];
         fds[i].events = POLLIN | POLLPRI;
     }
 
     while (true) {
-        int err = poll(fds, dev->intf_fds.size(), -1);
-
-        if (err > 0) {
-            for (size_t i = 0; i < dev->intf_fds.size(); i++)
-                if (fds[i].revents & (POLLIN | POLLPRI))
-                    handle_adf_event(dev, i);
-        }
-        else if (err == -1) {
-            if (errno == EINTR)
-                break;
+        if (TEMP_FAILURE_RETRY(poll(fds, dev->intf_fds.size(), -1)) < 0) {
             ALOGE("error in event thread: %s", strerror(errno));
+            break;
         }
+
+        for (size_t i = 0; i < dev->intf_fds.size(); i++)
+            if (fds[i].revents & (POLLIN | POLLPRI))
+                handle_adf_event(dev, i);
     }
 
-    delete [] fds;
     return NULL;
 }
 
@@ -264,6 +340,12 @@
         }
     }
 
+    sigset_t signal_set;
+    sigemptyset(&signal_set);
+    sigaddset(&signal_set, SIGUSR2);
+
+    pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
+
     ret = pthread_create(&dev_ret->event_thread, NULL, adf_event_thread,
             dev_ret);
     if (ret) {
@@ -284,7 +366,7 @@
 
 void adf_hwc_close(struct adf_hwc_helper *dev)
 {
-    pthread_kill(dev->event_thread, SIGTERM);
+    pthread_kill(dev->event_thread, SIGUSR2);
     pthread_join(dev->event_thread, NULL);
 
     for (size_t i = 0; i < dev->intf_fds.size(); i++)
diff --git a/adf/libadfhwc/include/adfhwc/adfhwc.h b/adf/libadfhwc/include/adfhwc/adfhwc.h
index 71e7624..4f70925 100644
--- a/adf/libadfhwc/include/adfhwc/adfhwc.h
+++ b/adf/libadfhwc/include/adfhwc/adfhwc.h
@@ -23,6 +23,7 @@
 #include <video/adf.h>
 
 #include <hardware/hwcomposer.h>
+#include <hardware/hwcomposer2.h>
 
 struct adf_hwc_helper;
 
@@ -123,6 +124,16 @@
         uint32_t *configs, size_t *numConfigs);
 int adf_getDisplayAttributes(struct adf_hwc_helper *dev, int disp,
         uint32_t config, const uint32_t *attributes, int32_t *values);
+/**
+ * Generic implementation of common HWC2 functions.
+ *
+ * The HWC2 should not return these functions directly through getFunction.
+ * Instead, the HWC2 should return stub functions which call these helpers.
+ */
+int adf_getDisplayAttributes_hwc2(struct adf_hwc_helper *dev, int disp,
+        uint32_t config, const uint32_t *attributes, int32_t *values);
+int adf_set_active_config_hwc2(struct adf_hwc_helper *dev, int disp,
+        uint32_t config);
 
 __END_DECLS
 
diff --git a/base/file.cpp b/base/file.cpp
index 6284b04..81b04d7 100644
--- a/base/file.cpp
+++ b/base/file.cpp
@@ -18,11 +18,13 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <libgen.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include <memory>
+#include <mutex>
 #include <string>
 #include <vector>
 
@@ -236,5 +238,59 @@
 #endif
 }
 
+std::string GetExecutableDirectory() {
+  return Dirname(GetExecutablePath());
+}
+
+std::string Basename(const std::string& path) {
+  // Copy path because basename may modify the string passed in.
+  std::string result(path);
+
+#if !defined(__BIONIC__)
+  // Use lock because basename() may write to a process global and return a
+  // pointer to that. Note that this locking strategy only works if all other
+  // callers to basename in the process also grab this same lock, but its
+  // better than nothing.  Bionic's basename returns a thread-local buffer.
+  static std::mutex& basename_lock = *new std::mutex();
+  std::lock_guard<std::mutex> lock(basename_lock);
+#endif
+
+  // Note that if std::string uses copy-on-write strings, &str[0] will cause
+  // the copy to be made, so there is no chance of us accidentally writing to
+  // the storage for 'path'.
+  char* name = basename(&result[0]);
+
+  // In case basename returned a pointer to a process global, copy that string
+  // before leaving the lock.
+  result.assign(name);
+
+  return result;
+}
+
+std::string Dirname(const std::string& path) {
+  // Copy path because dirname may modify the string passed in.
+  std::string result(path);
+
+#if !defined(__BIONIC__)
+  // Use lock because dirname() may write to a process global and return a
+  // pointer to that. Note that this locking strategy only works if all other
+  // callers to dirname in the process also grab this same lock, but its
+  // better than nothing.  Bionic's dirname returns a thread-local buffer.
+  static std::mutex& dirname_lock = *new std::mutex();
+  std::lock_guard<std::mutex> lock(dirname_lock);
+#endif
+
+  // Note that if std::string uses copy-on-write strings, &str[0] will cause
+  // the copy to be made, so there is no chance of us accidentally writing to
+  // the storage for 'path'.
+  char* parent = dirname(&result[0]);
+
+  // In case dirname returned a pointer to a process global, copy that string
+  // before leaving the lock.
+  result.assign(parent);
+
+  return result;
+}
+
 }  // namespace base
 }  // namespace android
diff --git a/base/file_test.cpp b/base/file_test.cpp
index ed39ce9..1021326 100644
--- a/base/file_test.cpp
+++ b/base/file_test.cpp
@@ -159,6 +159,26 @@
 #endif
 }
 
+TEST(file, GetExecutableDirectory) {
+  std::string path = android::base::GetExecutableDirectory();
+  ASSERT_NE("", path);
+  ASSERT_NE(android::base::GetExecutablePath(), path);
+  ASSERT_EQ('/', path[0]);
+  ASSERT_NE('/', path[path.size() - 1]);
+}
+
 TEST(file, GetExecutablePath) {
   ASSERT_NE("", android::base::GetExecutablePath());
 }
+
+TEST(file, Basename) {
+  EXPECT_EQ("sh", android::base::Basename("/system/bin/sh"));
+  EXPECT_EQ("sh", android::base::Basename("sh"));
+  EXPECT_EQ("sh", android::base::Basename("/system/bin/sh/"));
+}
+
+TEST(file, Dirname) {
+  EXPECT_EQ("/system/bin", android::base::Dirname("/system/bin/sh"));
+  EXPECT_EQ(".", android::base::Dirname("sh"));
+  EXPECT_EQ("/system/bin", android::base::Dirname("/system/bin/sh/"));
+}
diff --git a/base/include/android-base/file.h b/base/include/android-base/file.h
index cd64262..33d1ab3 100644
--- a/base/include/android-base/file.h
+++ b/base/include/android-base/file.h
@@ -51,6 +51,12 @@
 #endif
 
 std::string GetExecutablePath();
+std::string GetExecutableDirectory();
+
+// Like the regular basename and dirname, but thread-safe on all
+// platforms and capable of correctly handling exotic Windows paths.
+std::string Basename(const std::string& path);
+std::string Dirname(const std::string& path);
 
 }  // namespace base
 }  // namespace android
diff --git a/base/include/android-base/properties.h b/base/include/android-base/properties.h
index e2324b7..4de5e57 100644
--- a/base/include/android-base/properties.h
+++ b/base/include/android-base/properties.h
@@ -66,6 +66,12 @@
                      const std::string& expected_value,
                      std::chrono::milliseconds relative_timeout);
 
+// Waits for the system property `key` to be created.
+// Times out after `relative_timeout`.
+// Returns true on success, false on timeout.
+bool WaitForPropertyCreation(const std::string& key,
+                             std::chrono::milliseconds relative_timeout);
+
 } // namespace base
 } // namespace android
 
diff --git a/base/properties.cpp b/base/properties.cpp
index acd6c0f..32c0128 100644
--- a/base/properties.cpp
+++ b/base/properties.cpp
@@ -108,8 +108,10 @@
   ts.tv_nsec = ns.count();
 }
 
+using AbsTime = std::chrono::time_point<std::chrono::steady_clock>;
+
 static void UpdateTimeSpec(timespec& ts,
-                           const std::chrono::time_point<std::chrono::steady_clock>& timeout) {
+                           const AbsTime& timeout) {
   auto now = std::chrono::steady_clock::now();
   auto remaining_timeout = std::chrono::duration_cast<std::chrono::nanoseconds>(timeout - now);
   if (remaining_timeout < 0ns) {
@@ -119,13 +121,16 @@
   }
 }
 
-bool WaitForProperty(const std::string& key,
-                     const std::string& expected_value,
-                     std::chrono::milliseconds relative_timeout) {
+// Waits for the system property `key` to be created.
+// Times out after `relative_timeout`.
+// Sets absolute_timeout which represents absolute time for the timeout.
+// Returns nullptr on timeout.
+static const prop_info* WaitForPropertyCreation(const std::string& key,
+                                                const std::chrono::milliseconds& relative_timeout,
+                                                AbsTime& absolute_timeout) {
   // TODO: boot_clock?
   auto now = std::chrono::steady_clock::now();
-  std::chrono::time_point<std::chrono::steady_clock> absolute_timeout = now + relative_timeout;
-  timespec ts;
+  absolute_timeout = now + relative_timeout;
 
   // Find the property's prop_info*.
   const prop_info* pi;
@@ -133,14 +138,25 @@
   while ((pi = __system_property_find(key.c_str())) == nullptr) {
     // The property doesn't even exist yet.
     // Wait for a global change and then look again.
+    timespec ts;
     UpdateTimeSpec(ts, absolute_timeout);
-    if (!__system_property_wait(nullptr, global_serial, &global_serial, &ts)) return false;
+    if (!__system_property_wait(nullptr, global_serial, &global_serial, &ts)) return nullptr;
   }
+  return pi;
+}
+
+bool WaitForProperty(const std::string& key,
+                     const std::string& expected_value,
+                     std::chrono::milliseconds relative_timeout) {
+  AbsTime absolute_timeout;
+  const prop_info* pi = WaitForPropertyCreation(key, relative_timeout, absolute_timeout);
+  if (pi == nullptr) return false;
 
   WaitForPropertyData data;
   data.expected_value = &expected_value;
   data.done = false;
   while (true) {
+    timespec ts;
     // Check whether the property has the value we're looking for?
     __system_property_read_callback(pi, WaitForPropertyCallback, &data);
     if (data.done) return true;
@@ -152,5 +168,11 @@
   }
 }
 
+bool WaitForPropertyCreation(const std::string& key,
+                             std::chrono::milliseconds relative_timeout) {
+  AbsTime absolute_timeout;
+  return (WaitForPropertyCreation(key, relative_timeout, absolute_timeout) != nullptr);
+}
+
 }  // namespace base
 }  // namespace android
diff --git a/base/properties_test.cpp b/base/properties_test.cpp
index c68c2f8..1bbe482 100644
--- a/base/properties_test.cpp
+++ b/base/properties_test.cpp
@@ -150,3 +150,25 @@
   // Upper bounds on timing are inherently flaky, but let's try...
   ASSERT_LT(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 600ms);
 }
+
+TEST(properties, WaitForPropertyCreation) {
+  std::thread thread([&]() {
+    std::this_thread::sleep_for(100ms);
+    android::base::SetProperty("debug.libbase.WaitForPropertyCreation_test", "a");
+  });
+
+  ASSERT_TRUE(android::base::WaitForPropertyCreation(
+          "debug.libbase.WaitForPropertyCreation_test", 1s));
+  thread.join();
+}
+
+TEST(properties, WaitForPropertyCreation_timeout) {
+  auto t0 = std::chrono::steady_clock::now();
+  ASSERT_FALSE(android::base::WaitForPropertyCreation(
+          "debug.libbase.WaitForPropertyCreation_timeout_test", 200ms));
+  auto t1 = std::chrono::steady_clock::now();
+
+  ASSERT_GE(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 200ms);
+  // Upper bounds on timing are inherently flaky, but let's try...
+  ASSERT_LT(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 600ms);
+}
diff --git a/debuggerd/client/debuggerd_client.cpp b/debuggerd/client/debuggerd_client.cpp
index 81d70df..f2975d1 100644
--- a/debuggerd/client/debuggerd_client.cpp
+++ b/debuggerd/client/debuggerd_client.cpp
@@ -45,42 +45,6 @@
   return true;
 }
 
-static bool check_dumpable(pid_t pid) {
-  // /proc/<pid> is owned by the effective UID of the process.
-  // Ownership of most of the other files in /proc/<pid> varies based on PR_SET_DUMPABLE.
-  // If PR_GET_DUMPABLE would return 0, they're owned by root, instead.
-  std::string proc_pid_path = android::base::StringPrintf("/proc/%d/", pid);
-  std::string proc_pid_status_path = proc_pid_path + "/status";
-
-  unique_fd proc_pid_fd(open(proc_pid_path.c_str(), O_DIRECTORY | O_RDONLY | O_CLOEXEC));
-  if (proc_pid_fd == -1) {
-    return false;
-  }
-  unique_fd proc_pid_status_fd(openat(proc_pid_fd, "status", O_RDONLY | O_CLOEXEC));
-  if (proc_pid_status_fd == -1) {
-    return false;
-  }
-
-  struct stat proc_pid_st;
-  struct stat proc_pid_status_st;
-  if (fstat(proc_pid_fd.get(), &proc_pid_st) != 0 ||
-      fstat(proc_pid_status_fd.get(), &proc_pid_status_st) != 0) {
-    return false;
-  }
-
-  // We can't figure out if a process is dumpable if its effective UID is root, but that's fine
-  // because being root bypasses the PR_SET_DUMPABLE check for ptrace.
-  if (proc_pid_st.st_uid == 0) {
-    return true;
-  }
-
-  if (proc_pid_status_st.st_uid == 0) {
-    return false;
-  }
-
-  return true;
-}
-
 bool debuggerd_trigger_dump(pid_t pid, unique_fd output_fd, DebuggerdDumpType dump_type,
                             int timeout_ms) {
   LOG(INFO) << "libdebuggerd_client: started dumping process " << pid;
@@ -114,11 +78,6 @@
     return true;
   };
 
-  if (!check_dumpable(pid)) {
-    dprintf(output_fd.get(), "target pid %d is not dumpable\n", pid);
-    return true;
-  }
-
   sockfd.reset(socket(AF_LOCAL, SOCK_SEQPACKET, 0));
   if (sockfd == -1) {
     PLOG(ERROR) << "libdebugger_client: failed to create socket";
diff --git a/debuggerd/crasher/Android.bp b/debuggerd/crasher/Android.bp
index 4727894..f73f672 100644
--- a/debuggerd/crasher/Android.bp
+++ b/debuggerd/crasher/Android.bp
@@ -48,6 +48,7 @@
     shared_libs: [
         "libbase",
         "liblog",
+        "libseccomp_policy",
     ],
     multilib: {
         lib32: {
@@ -69,6 +70,7 @@
         "libdebuggerd_handler",
         "libbase",
         "liblog",
+        "libseccomp_policy",
     ],
     multilib: {
         lib32: {
diff --git a/debuggerd/crasher/crasher.cpp b/debuggerd/crasher/crasher.cpp
index 1c01e3e..6970201 100644
--- a/debuggerd/crasher/crasher.cpp
+++ b/debuggerd/crasher/crasher.cpp
@@ -33,6 +33,8 @@
 #include <android-base/logging.h>
 #include <log/log.h>
 
+#include "seccomp_policy.h"
+
 #if defined(STATIC_CRASHER)
 #include "debuggerd/handler.h"
 #endif
@@ -269,6 +271,7 @@
         munmap(map, sizeof(int));
         map[0] = '8';
     } else if (!strcasecmp(arg, "seccomp")) {
+        set_seccomp_filter();
         syscall(99999);
 #if defined(__arm__)
     } else if (!strcasecmp(arg, "kuser_helper_version")) {
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index 0c5d3cf..492e9f0 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -34,6 +34,8 @@
 
 static void usage(int exit_code) {
   fprintf(stderr, "usage: debuggerd [-b] PID\n");
+  fprintf(stderr, "\n");
+  fprintf(stderr, "-b, --backtrace    just a backtrace rather than a full tombstone\n");
   _exit(exit_code);
 }
 
@@ -56,7 +58,8 @@
 int main(int argc, char* argv[]) {
   if (argc <= 1) usage(0);
   if (argc > 3) usage(1);
-  if (argc == 3 && strcmp(argv[1], "-b") != 0) usage(1);
+  if (argc == 3 && strcmp(argv[1], "-b") != 0 && strcmp(argv[1], "--backtrace") != 0) usage(1);
+  bool backtrace_only = argc == 3;
 
   pid_t pid;
   if (!android::base::ParseInt(argv[argc - 1], &pid, 1, std::numeric_limits<pid_t>::max())) {
@@ -69,9 +72,8 @@
   }
 
   std::thread redirect_thread = spawn_redirect_thread(std::move(piperead));
-  bool backtrace = argc == 3;
   if (!debuggerd_trigger_dump(pid, std::move(pipewrite),
-                              backtrace ? kDebuggerdBacktrace : kDebuggerdTombstone, 0)) {
+                              backtrace_only ? kDebuggerdBacktrace : kDebuggerdTombstone, 0)) {
     redirect_thread.join();
     errx(1, "failed to dump process %d", pid);
   }
diff --git a/debuggerd/libdebuggerd/test/sys/system_properties.h b/debuggerd/libdebuggerd/test/sys/system_properties.h
index 9d44345..1f4f58a 100644
--- a/debuggerd/libdebuggerd/test/sys/system_properties.h
+++ b/debuggerd/libdebuggerd/test/sys/system_properties.h
@@ -32,7 +32,6 @@
 // This is just enough to get the property code to compile on
 // the host.
 
-#define PROP_NAME_MAX   32
 #define PROP_VALUE_MAX  92
 
 #endif // _DEBUGGERD_TEST_SYS_SYSTEM_PROPERTIES_H
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index 3166bfc..4686bfd 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -214,7 +214,8 @@
       cause = "call to kuser_cmpxchg64";
     }
   } else if (si.si_signo == SIGSYS && si.si_code == SYS_SECCOMP) {
-    cause = StringPrintf("seccomp prevented call to disallowed system call %d", si.si_syscall);
+    cause = StringPrintf("seccomp prevented call to disallowed %s system call %d",
+                         ABI_STRING, si.si_syscall);
   }
 
   if (!cause.empty()) _LOG(log, logtype::HEADER, "Cause: %s\n", cause.c_str());
diff --git a/debuggerd/tombstoned/tombstoned.cpp b/debuggerd/tombstoned/tombstoned.cpp
index 8705ece..6754508 100644
--- a/debuggerd/tombstoned/tombstoned.cpp
+++ b/debuggerd/tombstoned/tombstoned.cpp
@@ -34,6 +34,7 @@
 #include <android-base/unique_fd.h>
 #include <cutils/sockets.h>
 
+#include "debuggerd/handler.h"
 #include "debuggerd/protocol.h"
 #include "debuggerd/util.h"
 
@@ -116,7 +117,7 @@
   }
 
   result.reset(
-    openat(tombstone_directory_fd, buf, O_CREAT | O_EXCL | O_WRONLY | O_APPEND | O_CLOEXEC, 0700));
+    openat(tombstone_directory_fd, buf, O_CREAT | O_EXCL | O_WRONLY | O_APPEND | O_CLOEXEC, 0640));
   if (result == -1) {
     PLOG(FATAL) << "failed to create tombstone at " << kTombstoneDirectory << buf;
   }
@@ -254,6 +255,16 @@
 }
 
 int main(int, char* []) {
+  umask(0137);
+
+  // Don't try to connect to ourselves if we crash.
+  struct sigaction action = {};
+  action.sa_handler = [](int signal) {
+    LOG(ERROR) << "received fatal signal " << signal;
+    _exit(1);
+  };
+  debuggerd_register_handlers(&action);
+
   tombstone_directory_fd = open(kTombstoneDirectory, O_DIRECTORY | O_RDONLY | O_CLOEXEC);
   if (tombstone_directory_fd == -1) {
     PLOG(FATAL) << "failed to open tombstone directory";
diff --git a/fs_mgr/fs_mgr_verity.cpp b/fs_mgr/fs_mgr_verity.cpp
index e8ed6a2..54a6f71 100644
--- a/fs_mgr/fs_mgr_verity.cpp
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -30,6 +30,7 @@
 #include <unistd.h>
 
 #include <android-base/file.h>
+#include <android-base/properties.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <crypto_utils/android_pubkey.h>
@@ -874,6 +875,11 @@
     // read verity metadata
     if (fec_verity_get_metadata(f, &verity) < 0) {
         PERROR << "Failed to get verity metadata '" << fstab->blk_device << "'";
+        // Allow verity disabled when the device is unlocked without metadata
+        if ("0" == android::base::GetProperty("ro.boot.flash.locked", "")) {
+            retval = FS_MGR_SETUP_VERITY_DISABLED;
+            LWARNING << "Allow invalid metadata when the device is unlocked";
+        }
         goto out;
     }
 
diff --git a/init/Android.mk b/init/Android.mk
index 18cbedc..2fc6f19 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -107,6 +107,24 @@
     libnl \
     libavb
 
+# Include SELinux policy. We do this here because different modules
+# need to be included based on the value of PRODUCT_FULL_TREBLE. This
+# type of conditional inclusion cannot be done in top-level files such
+# as build/target/product/embedded.mk.
+# This conditional inclusion closely mimics the conditional logic
+# inside init/init.cpp for loading SELinux policy from files.
+ifeq ($(PRODUCT_FULL_TREBLE),true)
+# Use split SELinux policy
+LOCAL_REQUIRED_MODULES += \
+    mapping_sepolicy.cil \
+    nonplat_sepolicy.cil \
+    plat_sepolicy.cil \
+    secilc
+else
+# Use monolithic SELinux policy
+LOCAL_REQUIRED_MODULES += sepolicy
+endif
+
 # Create symlinks.
 LOCAL_POST_INSTALL_CMD := $(hide) mkdir -p $(TARGET_ROOT_OUT)/sbin; \
     ln -sf ../init $(TARGET_ROOT_OUT)/sbin/ueventd; \
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 6dd1cbb..9e3489e 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -604,20 +604,27 @@
     int mount_mode = MOUNT_MODE_DEFAULT;
     const char* fstabfile = args[1].c_str();
     std::size_t path_arg_end = args.size();
+    const char* prop_post_fix = "default";
 
     for (na = args.size() - 1; na > 1; --na) {
         if (args[na] == "--early") {
             path_arg_end = na;
             queue_event = false;
             mount_mode = MOUNT_MODE_EARLY;
+            prop_post_fix = "early";
         } else if (args[na] == "--late") {
             path_arg_end = na;
             import_rc = false;
             mount_mode = MOUNT_MODE_LATE;
+            prop_post_fix = "late";
         }
     }
 
+    std::string prop_name = android::base::StringPrintf("ro.boottime.init.mount_all.%s",
+                                                        prop_post_fix);
+    Timer t;
     int ret =  mount_fstab(fstabfile, mount_mode);
+    property_set(prop_name.c_str(), std::to_string(t.duration_ms()).c_str());
 
     if (import_rc) {
         /* Paths of .rc files are specified at the 2nd argument and beyond */
diff --git a/init/init.cpp b/init/init.cpp
index bddf005..81f228c 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -43,6 +43,7 @@
 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <android-base/unique_fd.h>
 #include <cutils/fs.h>
 #include <cutils/iosched_policy.h>
 #include <cutils/list.h>
@@ -618,6 +619,180 @@
     return 0;
 }
 
+/*
+ * Forks, executes the provided program in the child, and waits for the completion in the parent.
+ * Child's stderr is captured and logged using LOG(ERROR).
+ *
+ * Returns true if the child exited with status code 0, returns false otherwise.
+ */
+static bool fork_execve_and_wait_for_completion(const char* filename, char* const argv[],
+                                                char* const envp[]) {
+    // Create a pipe used for redirecting child process's output.
+    // * pipe_fds[0] is the FD the parent will use for reading.
+    // * pipe_fds[1] is the FD the child will use for writing.
+    int pipe_fds[2];
+    if (pipe(pipe_fds) == -1) {
+        PLOG(ERROR) << "Failed to create pipe";
+        return false;
+    }
+
+    pid_t child_pid = fork();
+    if (child_pid == -1) {
+        PLOG(ERROR) << "Failed to fork for " << filename;
+        return false;
+    }
+
+    if (child_pid == 0) {
+        // fork succeeded -- this is executing in the child process
+
+        // Close the pipe FD not used by this process
+        TEMP_FAILURE_RETRY(close(pipe_fds[0]));
+
+        // Redirect stderr to the pipe FD provided by the parent
+        if (TEMP_FAILURE_RETRY(dup2(pipe_fds[1], STDERR_FILENO)) == -1) {
+            PLOG(ERROR) << "Failed to redirect stderr of " << filename;
+            _exit(127);
+            return false;
+        }
+        TEMP_FAILURE_RETRY(close(pipe_fds[1]));
+
+        if (execve(filename, argv, envp) == -1) {
+            PLOG(ERROR) << "Failed to execve " << filename;
+            return false;
+        }
+        // Unreachable because execve will have succeeded and replaced this code
+        // with child process's code.
+        _exit(127);
+        return false;
+    } else {
+        // fork succeeded -- this is executing in the original/parent process
+
+        // Close the pipe FD not used by this process
+        TEMP_FAILURE_RETRY(close(pipe_fds[1]));
+
+        // Log the redirected output of the child process.
+        // It's unfortunate that there's no standard way to obtain an istream for a file descriptor.
+        // As a result, we're buffering all output and logging it in one go at the end of the
+        // invocation, instead of logging it as it comes in.
+        const int child_out_fd = pipe_fds[0];
+        std::string child_output;
+        if (!android::base::ReadFdToString(child_out_fd, &child_output)) {
+            PLOG(ERROR) << "Failed to capture full output of " << filename;
+        }
+        TEMP_FAILURE_RETRY(close(child_out_fd));
+        if (!child_output.empty()) {
+            // Log captured output, line by line, because LOG expects to be invoked for each line
+            std::istringstream in(child_output);
+            std::string line;
+            while (std::getline(in, line)) {
+                LOG(ERROR) << filename << ": " << line;
+            }
+        }
+
+        // Wait for child to terminate
+        int status;
+        if (TEMP_FAILURE_RETRY(waitpid(child_pid, &status, 0)) != child_pid) {
+            PLOG(ERROR) << "Failed to wait for " << filename;
+            return false;
+        }
+
+        if (WIFEXITED(status)) {
+            int status_code = WEXITSTATUS(status);
+            if (status_code == 0) {
+                return true;
+            } else {
+                LOG(ERROR) << filename << " exited with status " << status_code;
+            }
+        } else if (WIFSIGNALED(status)) {
+            LOG(ERROR) << filename << " killed by signal " << WTERMSIG(status);
+        } else if (WIFSTOPPED(status)) {
+            LOG(ERROR) << filename << " stopped by signal " << WSTOPSIG(status);
+        } else {
+            LOG(ERROR) << "waitpid for " << filename << " returned unexpected status: " << status;
+        }
+
+        return false;
+    }
+}
+
+static constexpr const char plat_policy_cil_file[] = "/system/etc/selinux/plat_sepolicy.cil";
+
+static bool selinux_is_split_policy_device() { return access(plat_policy_cil_file, R_OK) != -1; }
+
+/*
+ * Loads SELinux policy split across platform/system and non-platform/vendor files.
+ *
+ * Returns true upon success, false otherwise (failure cause is logged).
+ */
+static bool selinux_load_split_policy() {
+    // IMPLEMENTATION NOTE: Split policy consists of three CIL files:
+    // * platform -- policy needed due to logic contained in the system image,
+    // * non-platform -- policy needed due to logic contained in the vendor image,
+    // * mapping -- mapping policy which helps preserve forward-compatibility of non-platform policy
+    //   with newer versions of platform policy.
+    //
+    // secilc is invoked to compile the above three policy files into a single monolithic policy
+    // file. This file is then loaded into the kernel.
+
+    LOG(INFO) << "Compiling SELinux policy";
+
+    // We store the output of the compilation on /dev because this is the most convenient tmpfs
+    // storage mount available this early in the boot sequence.
+    char compiled_sepolicy[] = "/dev/sepolicy.XXXXXX";
+    android::base::unique_fd compiled_sepolicy_fd(mkostemp(compiled_sepolicy, O_CLOEXEC));
+    if (compiled_sepolicy_fd < 0) {
+        PLOG(ERROR) << "Failed to create temporary file " << compiled_sepolicy;
+        return false;
+    }
+
+    const char* compile_args[] = {"/system/bin/secilc", plat_policy_cil_file, "-M", "true", "-c",
+                                  "30",  // TODO: pass in SELinux policy version from build system
+                                  "/vendor/etc/selinux/mapping_sepolicy.cil",
+                                  "/vendor/etc/selinux/nonplat_sepolicy.cil", "-o",
+                                  compiled_sepolicy,
+                                  // We don't care about file_contexts output by the compiler
+                                  "-f", "/sys/fs/selinux/null",  // /dev/null is not yet available
+                                  nullptr};
+
+    if (!fork_execve_and_wait_for_completion(compile_args[0], (char**)compile_args, (char**)ENV)) {
+        unlink(compiled_sepolicy);
+        return false;
+    }
+    unlink(compiled_sepolicy);
+
+    LOG(INFO) << "Loading compiled SELinux policy";
+    if (selinux_android_load_policy_from_fd(compiled_sepolicy_fd, compiled_sepolicy) < 0) {
+        LOG(ERROR) << "Failed to load SELinux policy from " << compiled_sepolicy;
+        return false;
+    }
+
+    return true;
+}
+
+/*
+ * Loads SELinux policy from a monolithic file.
+ *
+ * Returns true upon success, false otherwise (failure cause is logged).
+ */
+static bool selinux_load_monolithic_policy() {
+    LOG(VERBOSE) << "Loading SELinux policy from monolithic file";
+    if (selinux_android_load_policy() < 0) {
+        PLOG(ERROR) << "Failed to load monolithic SELinux policy";
+        return false;
+    }
+    return true;
+}
+
+/*
+ * Loads SELinux policy into the kernel.
+ *
+ * Returns true upon success, false otherwise (failure cause is logged).
+ */
+static bool selinux_load_policy() {
+    return selinux_is_split_policy_device() ? selinux_load_split_policy()
+                                            : selinux_load_monolithic_policy();
+}
+
 static void selinux_initialize(bool in_kernel_domain) {
     Timer t;
 
@@ -628,10 +803,9 @@
     selinux_set_callback(SELINUX_CB_AUDIT, cb);
 
     if (in_kernel_domain) {
-        LOG(INFO) << "Loading SELinux policy...";
-        if (selinux_android_load_policy() < 0) {
-            PLOG(ERROR) << "failed to load policy";
-            security_failure();
+        LOG(INFO) << "Loading SELinux policy";
+        if (!selinux_load_policy()) {
+            panic();
         }
 
         bool kernel_enforcing = (security_getenforce() == 1);
@@ -790,6 +964,12 @@
 
 /* Early mount vendor and ODM partitions. The fstab is read from device-tree. */
 static bool early_mount() {
+    // skip early mount if we're in recovery mode
+    if (access("/sbin/recovery", F_OK) == 0) {
+        LOG(INFO) << "Early mount skipped (recovery mode)";
+        return true;
+    }
+
     // first check if device tree fstab entries are compatible
     if (!is_dt_fstab_compatible()) {
         LOG(INFO) << "Early mount skipped (missing/incompatible fstab in device tree)";
diff --git a/init/property_service.cpp b/init/property_service.cpp
index 04bcb18..d88b72e 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -49,6 +50,7 @@
 
 #include <fs_mgr.h>
 #include <android-base/file.h>
+#include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include "bootimg.h"
 
@@ -57,6 +59,8 @@
 #include "util.h"
 #include "log.h"
 
+using android::base::StringPrintf;
+
 #define PERSISTENT_PROPERTY_DIR  "/data/property"
 #define FSTAB_PREFIX "/fstab."
 #define RECOVERY_MOUNT_POINT "/recovery"
@@ -605,6 +609,7 @@
     load_override_properties();
     /* Read persistent properties after all default values have been loaded. */
     load_persistent_properties();
+    property_set("ro.persistent_properties.ready", "true");
 }
 
 void load_recovery_id_prop() {
diff --git a/init/service.cpp b/init/service.cpp
index e186f27..ba901fd 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -180,12 +180,6 @@
     }
 
     std::string prop_name = StringPrintf("init.svc.%s", name_.c_str());
-    if (prop_name.length() >= PROP_NAME_MAX) {
-        // If the property name would be too long, we can't set it.
-        LOG(ERROR) << "Property name \"init.svc." << name_ << "\" too long; not setting to " << new_state;
-        return;
-    }
-
     property_set(prop_name.c_str(), new_state.c_str());
 
     if (new_state == "running") {
@@ -1040,5 +1034,9 @@
 }
 
 bool ServiceParser::IsValidName(const std::string& name) const {
-    return is_legal_property_name("init.svc." + name);
+    // Property names can be any length, but may only contain certain characters.
+    // Property values can contain any characters, but may only be a certain length.
+    // (The latter restriction is needed because `start` and `stop` work by writing
+    // the service name to the "ctl.start" and "ctl.stop" properties.)
+    return is_legal_property_name("init.svc." + name) && name.size() <= PROP_VALUE_MAX;
 }
diff --git a/libbinderwrapper/Android.mk b/libbinderwrapper/Android.mk
index b38d262..c768373 100644
--- a/libbinderwrapper/Android.mk
+++ b/libbinderwrapper/Android.mk
@@ -41,7 +41,7 @@
 
 include $(BUILD_SHARED_LIBRARY)
 
-# libbinderwrapper_test_support shared library
+# libbinderwrapper_test_support static library
 # ========================================================
 
 include $(CLEAR_VARS)
@@ -59,4 +59,4 @@
   binder_test_base.cc \
   stub_binder_wrapper.cc \
 
-include $(BUILD_SHARED_LIBRARY)
+include $(BUILD_STATIC_LIBRARY)
diff --git a/liblog/event_tag_map.cpp b/liblog/event_tag_map.cpp
index 1f08eb4..42f0f37 100644
--- a/liblog/event_tag_map.cpp
+++ b/liblog/event_tag_map.cpp
@@ -227,19 +227,30 @@
 // successful return, it will be pointing to the last character in the
 // tag line (i.e. the character before the start of the next line).
 //
+// lineNum = 0 removes verbose comments and requires us to cache the
+// content rather than make direct raw references since the content
+// will disappear after the call. A non-zero lineNum means we own the
+// data and it will outlive the call.
+//
 // Returns 0 on success, nonzero on failure.
 static int scanTagLine(EventTagMap* map, char** pData, int lineNum) {
     char* cp;
     unsigned long val = strtoul(*pData, &cp, 10);
     if (cp == *pData) {
-        fprintf(stderr, OUT_TAG ": malformed tag number on line %d\n", lineNum);
+        if (lineNum) {
+            fprintf(stderr, OUT_TAG ": malformed tag number on line %d\n",
+                    lineNum);
+        }
         errno = EINVAL;
         return -1;
     }
 
     uint32_t tagIndex = val;
     if (tagIndex != val) {
-        fprintf(stderr, OUT_TAG ": tag number too large on line %d\n", lineNum);
+        if (lineNum) {
+            fprintf(stderr, OUT_TAG ": tag number too large on line %d\n",
+                    lineNum);
+        }
         errno = ERANGE;
         return -1;
     }
@@ -248,7 +259,10 @@
     }
 
     if (*cp == '\n') {
-        fprintf(stderr, OUT_TAG ": missing tag string on line %d\n", lineNum);
+        if (lineNum) {
+            fprintf(stderr, OUT_TAG ": missing tag string on line %d\n",
+                    lineNum);
+        }
         errno = EINVAL;
         return -1;
     }
@@ -259,7 +273,10 @@
     size_t tagLen = cp - tag;
 
     if (!isspace(*cp)) {
-        fprintf(stderr, OUT_TAG ": invalid tag chars on line %d\n", lineNum);
+        if (lineNum) {
+            fprintf(stderr, OUT_TAG ": invalid tag chars on line %d\n",
+                    lineNum);
+        }
         errno = EINVAL;
         return -1;
     }
@@ -293,9 +310,18 @@
 #endif
     *pData = cp;
 
-    if (map->emplaceUnique(tagIndex, TagFmt(std::make_pair(
-            MapString(tag, tagLen), MapString(fmt, fmtLen))), verbose)) {
-        return 0;
+    if (lineNum) {
+        if (map->emplaceUnique(tagIndex, TagFmt(std::make_pair(
+                MapString(tag, tagLen), MapString(fmt, fmtLen))), verbose)) {
+            return 0;
+        }
+    } else {
+        // cache
+        if (map->emplaceUnique(tagIndex, TagFmt(std::make_pair(
+                MapString(std::string(tag, tagLen)),
+                MapString(std::string(fmt, fmtLen)))))) {
+            return 0;
+        }
     }
     errno = EMLINK;
     return -1;
@@ -455,12 +481,55 @@
     if (map) delete map;
 }
 
+// Cache miss, go to logd to acquire a public reference.
+// Because we lack access to a SHARED PUBLIC /dev/event-log-tags file map?
+static const TagFmt* __getEventTag(EventTagMap* map, unsigned int tag) {
+    // call event tag service to arrange for a new tag
+    char *buf = NULL;
+    // Can not use android::base::StringPrintf, asprintf + free instead.
+    static const char command_template[] = "getEventTag id=%u";
+    int ret = asprintf(&buf, command_template, tag);
+    if (ret > 0) {
+        // Add some buffer margin for an estimate of the full return content.
+        char *cp;
+        size_t size = ret - strlen(command_template) +
+            strlen("65535\n4294967295\t?\t\t\t?\t# uid=32767\n\n\f?success?");
+        if (size > (size_t)ret) {
+            cp = static_cast<char*>(realloc(buf, size));
+            if (cp) {
+                buf = cp;
+            } else {
+                size = ret;
+            }
+        } else {
+            size = ret;
+        }
+        // Ask event log tag service for an existing entry
+        if (__send_log_msg(buf, size) >= 0) {
+            buf[size - 1] = '\0';
+            unsigned long val = strtoul(buf, &cp, 10); // return size
+            if ((buf != cp) && (val > 0) && (*cp == '\n')) { // truncation OK
+                ++cp;
+                if (!scanTagLine(map, &cp, 0)) {
+                    free(buf);
+                    return map->find(tag);
+                }
+            }
+        }
+        free(buf);
+    }
+    return NULL;
+}
+
 // Look up an entry in the map.
 LIBLOG_ABI_PUBLIC const char* android_lookupEventTag_len(const EventTagMap* map,
                                                          size_t *len,
                                                          unsigned int tag) {
     if (len) *len = 0;
     const TagFmt* str = map->find(tag);
+    if (!str) {
+        str = __getEventTag(const_cast<EventTagMap*>(map), tag);
+    }
     if (!str) return NULL;
     if (len) *len = str->first.length();
     return str->first.data();
@@ -471,6 +540,9 @@
         const EventTagMap* map, size_t *len, unsigned int tag) {
     if (len) *len = 0;
     const TagFmt* str = map->find(tag);
+    if (!str) {
+        str = __getEventTag(const_cast<EventTagMap*>(map), tag);
+    }
     if (!str) return NULL;
     if (len) *len = str->second.length();
     return str->second.data();
diff --git a/liblog/logprint.c b/liblog/logprint.c
index af52528..4421f83 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -20,9 +20,6 @@
 #define HAVE_STRSEP
 #endif
 
-//#ifndef __MINGW32__
-//#include <arpa/inet.h>
-//#endif
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
@@ -117,7 +114,7 @@
     c = tolower(c);
 
     if (c >= '0' && c <= '9') {
-        if (c >= ('0'+ANDROID_LOG_SILENT)) {
+        if (c >= ('0' + ANDROID_LOG_SILENT)) {
             pri = ANDROID_LOG_VERBOSE;
         } else {
             pri = (android_LogPriority)(c - '0');
@@ -397,7 +394,7 @@
     }
 
     if(filterExpression[tagNameLength] == ':') {
-        pri = filterCharToPri(filterExpression[tagNameLength+1]);
+        pri = filterCharToPri(filterExpression[tagNameLength + 1]);
 
         if (pri == ANDROID_LOG_UNKNOWN) {
             goto error;
@@ -521,6 +518,9 @@
         struct logger_entry *buf,
         AndroidLogEntry *entry)
 {
+    entry->message = NULL;
+    entry->messageLen = 0;
+
     entry->tv_sec = buf->sec;
     entry->tv_nsec = buf->nsec;
     entry->uid = -1;
@@ -621,7 +621,7 @@
 
     low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
     high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
-    return ((uint64_t) high << 32) | (uint64_t) low;
+    return ((uint64_t)high << 32) | (uint64_t)low;
 }
 
 static bool findChar(const char** cp, size_t* len, int c) {
@@ -829,7 +829,10 @@
             eventData += 4;
             eventDataLen -= 4;
 
-            if (eventDataLen < strLen) return -1;
+            if (eventDataLen < strLen) {
+                result = -1; /* mark truncated */
+                strLen = eventDataLen;
+            }
 
             if (cp && (strLen == 0)) {
                 /* reset the format if no content */
@@ -840,15 +843,18 @@
                 memcpy(outBuf, eventData, strLen);
                 outBuf += strLen;
                 outBufLen -= strLen;
-            } else if (outBufLen > 0) {
-                /* copy what we can */
-                memcpy(outBuf, eventData, outBufLen);
-                outBuf += outBufLen;
-                outBufLen -= outBufLen;
-                goto no_room;
+            } else {
+                if (outBufLen > 0) {
+                    /* copy what we can */
+                    memcpy(outBuf, eventData, outBufLen);
+                    outBuf += outBufLen;
+                    outBufLen -= outBufLen;
+                }
+                if (!result) result = 1; /* if not truncated, return no room */
             }
             eventData += strLen;
             eventDataLen -= strLen;
+            if (result != 0) goto bail;
             break;
         }
     case EVENT_TYPE_LIST:
@@ -991,13 +997,16 @@
 LIBLOG_ABI_PUBLIC int android_log_processBinaryLogBuffer(
         struct logger_entry *buf,
         AndroidLogEntry *entry,
-        const EventTagMap *map __unused, // only on !__ANDROID__
+        const EventTagMap *map __unused, /* only on !__ANDROID__ */
         char *messageBuf, int messageBufLen)
 {
     size_t inCount;
     uint32_t tagIndex;
     const unsigned char* eventData;
 
+    entry->message = NULL;
+    entry->messageLen = 0;
+
     entry->tv_sec = buf->sec;
     entry->tv_nsec = buf->nsec;
     entry->priority = ANDROID_LOG_INFO;
@@ -1009,7 +1018,7 @@
      * Pull the tag out, fill in some additional details based on incoming
      * buffer version (v3 adds lid, v4 adds uid).
      */
-    eventData = (const unsigned char*) buf->msg;
+    eventData = (const unsigned char*)buf->msg;
     struct logger_entry_v2 *buf2 = (struct logger_entry_v2 *)buf;
     if (buf2->hdr_size) {
         if ((buf2->hdr_size < sizeof(((struct log_msg *)NULL)->entry_v1)) ||
@@ -1122,7 +1131,7 @@
      */
     *outBuf = '\0';
     entry->messageLen = outBuf - messageBuf;
-    assert(entry->messageLen == (messageBufLen-1) - outRemaining);
+    assert(entry->messageLen == (messageBufLen - 1) - outRemaining);
 
     entry->message = messageBuf;
 
@@ -1217,7 +1226,7 @@
                 } else if (*message == '\b') {
                     strcpy(buf, "\\b");
                 } else if (*message == '\t') {
-                    strcpy(buf, "\t"); // Do not escape tabs
+                    strcpy(buf, "\t"); /* Do not escape tabs */
                 } else if (*message == '\v') {
                     strcpy(buf, "\\v");
                 } else if (*message == '\f') {
@@ -1574,7 +1583,7 @@
     nsec = entry->tv_nsec;
 #if __ANDROID__
     if (p_format->monotonic_output) {
-        // prevent convertMonotonic from being called if logd is monotonic
+        /* prevent convertMonotonic from being called if logd is monotonic */
         if (android_log_clockid() != CLOCK_MONOTONIC) {
             struct timespec time;
             convertMonotonic(&time, entry);
@@ -1648,7 +1657,7 @@
             } else
 #endif
             {
-                 // Not worth parsing package list, names all longer than 5
+                 /* Not worth parsing package list, names all longer than 5 */
                  snprintf(uid, sizeof(uid), "%5d:", entry->uid);
             }
         } else {
@@ -1758,7 +1767,7 @@
             if (*pm++ == '\n') numLines++;
         }
         /* plus one line for anything not newline-terminated at the end */
-        if (pm > entry->message && *(pm-1) != '\n') numLines++;
+        if (pm > entry->message && *(pm - 1) != '\n') numLines++;
     }
 
     /*
diff --git a/libsysutils/Android.mk b/libsysutils/Android.mk
index 330d6cb..584e5a2 100644
--- a/libsysutils/Android.mk
+++ b/libsysutils/Android.mk
@@ -17,6 +17,7 @@
 LOCAL_CFLAGS := -Werror
 
 LOCAL_SHARED_LIBRARIES := \
+        libbase \
         libcutils \
         liblog \
         libnl
@@ -24,4 +25,3 @@
 LOCAL_EXPORT_C_INCLUDE_DIRS := system/core/libsysutils/include
 
 include $(BUILD_SHARED_LIBRARY)
-
diff --git a/libsysutils/src/ServiceManager.cpp b/libsysutils/src/ServiceManager.cpp
index 13bac09..c7aa1f7 100644
--- a/libsysutils/src/ServiceManager.cpp
+++ b/libsysutils/src/ServiceManager.cpp
@@ -19,34 +19,23 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
+#include <sys/system_properties.h>
 #include <unistd.h>
 
-#include <cutils/properties.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
 #include <log/log.h>
 #include <sysutils/ServiceManager.h>
 
 ServiceManager::ServiceManager() {
 }
 
-/* The service name should not exceed SERVICE_NAME_MAX to avoid
- * some weird things. This is due to the fact that:
- *
- * - Starting a service is done by writing its name to the "ctl.start"
- *   system property. This triggers the init daemon to actually start
- *   the service for us.
- *
- * - Stopping the service is done by writing its name to "ctl.stop"
- *   in a similar way.
- *
- * - Reading the status of a service is done by reading the property
- *   named "init.svc.<name>"
- *
- * If strlen(<name>) > (PROPERTY_KEY_MAX-1)-9, then you can start/stop
- * the service by writing to ctl.start/stop, but you won't be able to
- * read its state due to the truncation of "init.svc.<name>" into a
- * zero-terminated buffer of PROPERTY_KEY_MAX characters.
- */
-#define SERVICE_NAME_MAX  (PROPERTY_KEY_MAX-10)
+// The length of a service name should not exceed SERVICE_NAME_MAX. Starting
+// a service is done by writing its name to the "ctl.start" system property
+// and stopping a service is done by writing its name to "ctl.stop". If a
+// service name is too long to fit in a property, you won't be able to start
+// or stop it.
+static constexpr size_t SERVICE_NAME_MAX = PROP_VALUE_MAX;
 
 /* The maximum amount of time to wait for a service to start or stop,
  * in micro-seconds (really an approximation) */
@@ -61,13 +50,14 @@
         SLOGE("Service name '%s' is too long", name);
         return 0;
     }
+
     if (isRunning(name)) {
         SLOGW("Service '%s' is already running", name);
         return 0;
     }
 
     SLOGD("Starting service '%s'", name);
-    property_set("ctl.start", name);
+    android::base::SetProperty("ctl.start", name);
 
     int count = SLEEP_MAX_USEC;
     while(count > 0) {
@@ -90,13 +80,14 @@
         SLOGE("Service name '%s' is too long", name);
         return 0;
     }
+
     if (!isRunning(name)) {
         SLOGW("Service '%s' is already stopped", name);
         return 0;
     }
 
     SLOGD("Stopping service '%s'", name);
-    property_set("ctl.stop", name);
+    android::base::SetProperty("ctl.stop", name);
 
     int count = SLEEP_MAX_USEC;
     while(count > 0) {
@@ -116,19 +107,6 @@
 }
 
 bool ServiceManager::isRunning(const char *name) {
-    char propVal[PROPERTY_VALUE_MAX];
-    char propName[PROPERTY_KEY_MAX];
-    int  ret;
-
-    ret = snprintf(propName, sizeof(propName), "init.svc.%s", name);
-    if (ret > (int)sizeof(propName)-1) {
-        SLOGD("Service name '%s' is too long", name);
-        return false;
-    }
-
-    if (property_get(propName, propVal, NULL)) {
-        if (!strcmp(propVal, "running"))
-            return true;
-    }
-    return false;
+    std::string property_name = android::base::StringPrintf("init.svc.%s", name);
+    return (android::base::GetProperty(property_name, "") == "running");
 }
diff --git a/libutils/include/utils/Condition.h b/libutils/include/utils/Condition.h
index 2c80acd..3019a21 100644
--- a/libutils/include/utils/Condition.h
+++ b/libutils/include/utils/Condition.h
@@ -41,6 +41,11 @@
  * call wait(), then either re-wait() if things aren't quite what you want,
  * or unlock the mutex and continue.  All threads calling wait() must
  * use the same mutex for a given Condition.
+ *
+ * On Android and Apple platforms, these are implemented as a simple wrapper
+ * around pthread condition variables.  Care must be taken to abide by
+ * the pthreads semantics, in particular, a boolean predicate must
+ * be re-evaluated after a wake-up, as spurious wake-ups may happen.
  */
 class Condition {
 public:
@@ -58,10 +63,11 @@
     explicit Condition(int type);
     ~Condition();
     // Wait on the condition variable.  Lock the mutex before calling.
+    // Note that spurious wake-ups may happen.
     status_t wait(Mutex& mutex);
     // same with relative timeout
     status_t waitRelative(Mutex& mutex, nsecs_t reltime);
-    // Signal the condition variable, allowing exactly one thread to continue.
+    // Signal the condition variable, allowing one thread to continue.
     void signal();
     // Signal the condition variable, allowing one or all threads to continue.
     void signal(WakeUpType type) {
@@ -142,17 +148,6 @@
     return -pthread_cond_timedwait(&mCond, &mutex.mMutex, &ts);
 }
 inline void Condition::signal() {
-    /*
-     * POSIX says pthread_cond_signal wakes up "one or more" waiting threads.
-     * However bionic follows the glibc guarantee which wakes up "exactly one"
-     * waiting thread.
-     *
-     * man 3 pthread_cond_signal
-     *   pthread_cond_signal restarts one of the threads that are waiting on
-     *   the condition variable cond. If no threads are waiting on cond,
-     *   nothing happens. If several threads are waiting on cond, exactly one
-     *   is restarted, but it is not specified which.
-     */
     pthread_cond_signal(&mCond);
 }
 inline void Condition::broadcast() {
diff --git a/libutils/tests/Android.bp b/libutils/tests/Android.bp
index 70ada72..ea606a1 100644
--- a/libutils/tests/Android.bp
+++ b/libutils/tests/Android.bp
@@ -23,6 +23,7 @@
     srcs: [
         "BitSet_test.cpp",
         "LruCache_test.cpp",
+        "Singleton_test.cpp",
         "String8_test.cpp",
         "StrongPointer_test.cpp",
         "Unicode_test.cpp",
@@ -42,6 +43,8 @@
                 "liblog",
                 "libcutils",
                 "libutils",
+                "libbase",
+                "libdl",
             ],
         },
         linux: {
@@ -54,13 +57,35 @@
             static_libs: [
                 "libutils",
                 "liblog",
+                "libbase",
             ],
+            host_ldlibs: ["-ldl"],
         },
     },
 
+    required: [
+        "libutils_tests_singleton1",
+        "libutils_tests_singleton2",
+    ],
+
     cflags: [
         "-Wall",
         "-Wextra",
         "-Werror",
     ],
 }
+
+cc_test_library {
+    name: "libutils_tests_singleton1",
+    host_supported: true,
+    relative_install_path: "libutils_tests",
+    srcs: ["Singleton_test1.cpp"],
+}
+
+cc_test_library {
+    name: "libutils_tests_singleton2",
+    host_supported: true,
+    relative_install_path: "libutils_tests",
+    srcs: ["Singleton_test2.cpp"],
+    shared_libs: ["libutils_tests_singleton1"],
+}
diff --git a/libutils/tests/Singleton_test.cpp b/libutils/tests/Singleton_test.cpp
new file mode 100644
index 0000000..9acd3c3
--- /dev/null
+++ b/libutils/tests/Singleton_test.cpp
@@ -0,0 +1,69 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "Singleton_test"
+
+#include <dlfcn.h>
+
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
+#include <utils/Singleton.h>
+
+#include <gtest/gtest.h>
+
+#include "Singleton_test.h"
+
+namespace android {
+
+TEST(SingletonTest, bug35674422) {
+    std::string path = android::base::GetExecutableDirectory();
+    // libutils_tests_singleton1.so contains the ANDROID_SINGLETON_STATIC_INSTANCE
+    // definition of SingletonTestData, load it first.
+    std::string lib = android::base::StringPrintf("%s/libutils_tests_singleton1.so", path.c_str());
+    void* handle1 = dlopen(lib.c_str(), RTLD_NOW);
+    ASSERT_TRUE(handle1 != nullptr) << dlerror();
+
+    // libutils_tests_singleton2.so references SingletonTestData but should not
+    // have a definition
+    lib = android::base::StringPrintf("%s/libutils_tests_singleton2.so", path.c_str());
+    void* handle2 = dlopen(lib.c_str(), RTLD_NOW);
+    ASSERT_TRUE(handle2 != nullptr) << dlerror();
+
+    using has_fn_t = decltype(&singletonHasInstance);
+    using get_fn_t = decltype(&singletonGetInstanceContents);
+    using set_fn_t = decltype(&singletonSetInstanceContents);
+
+    has_fn_t has1 = reinterpret_cast<has_fn_t>(dlsym(handle1, "singletonHasInstance"));
+    ASSERT_TRUE(has1 != nullptr) << dlerror();
+    has_fn_t has2 = reinterpret_cast<has_fn_t>(dlsym(handle2, "singletonHasInstance"));
+    ASSERT_TRUE(has2 != nullptr) << dlerror();
+    get_fn_t get1 = reinterpret_cast<get_fn_t>(dlsym(handle1, "singletonGetInstanceContents"));
+    ASSERT_TRUE(get1 != nullptr) << dlerror();
+    get_fn_t get2 = reinterpret_cast<get_fn_t>(dlsym(handle2, "singletonGetInstanceContents"));
+    ASSERT_TRUE(get2 != nullptr) << dlerror();
+    set_fn_t set1 = reinterpret_cast<set_fn_t>(dlsym(handle2, "singletonSetInstanceContents"));
+    ASSERT_TRUE(set1 != nullptr) << dlerror();
+
+    EXPECT_FALSE(has1());
+    EXPECT_FALSE(has2());
+    set1(12345678U);
+    EXPECT_TRUE(has1());
+    EXPECT_TRUE(has2());
+    EXPECT_EQ(12345678U, get1());
+    EXPECT_EQ(12345678U, get2());
+}
+
+}
diff --git a/libutils/tests/Singleton_test.h b/libutils/tests/Singleton_test.h
new file mode 100644
index 0000000..c77d9ff
--- /dev/null
+++ b/libutils/tests/Singleton_test.h
@@ -0,0 +1,41 @@
+/*
+ * 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 ANDROID_UTILS_SINGLETON_TEST_H
+#define ANDROID_UTILS_SINGLETON_TEST_H
+
+#include <sys/cdefs.h>
+
+#include "Singleton_test.h"
+
+namespace android {
+
+struct SingletonTestData : Singleton<SingletonTestData> {
+    unsigned int contents;
+};
+
+__BEGIN_DECLS
+
+unsigned int singletonGetInstanceContents();
+void singletonSetInstanceContents(unsigned int);
+bool singletonHasInstance();
+
+__END_DECLS
+
+}
+
+#endif // ANDROID_UTILS_SINGLETON_TEST_H
+
diff --git a/libutils/tests/Singleton_test1.cpp b/libutils/tests/Singleton_test1.cpp
new file mode 100644
index 0000000..4a91ec0
--- /dev/null
+++ b/libutils/tests/Singleton_test1.cpp
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+#include <utils/Singleton.h>
+
+#include "Singleton_test.h"
+
+namespace android {
+
+// Singleton<SingletonTestStruct> is referenced in Singleton_test1.cpp and
+// Singleton_test2.cpp, but only defined in Singleton_test1.cpp.
+ANDROID_SINGLETON_STATIC_INSTANCE(SingletonTestData);
+
+void singletonSetInstanceContents(unsigned int contents) {
+    SingletonTestData::getInstance().contents = contents;
+}
+
+unsigned int singletonGetInstanceContents() {
+    return SingletonTestData::getInstance().contents;
+}
+
+bool singletonHasInstance() {
+    return SingletonTestData::hasInstance();
+}
+
+}
diff --git a/libutils/tests/Singleton_test2.cpp b/libutils/tests/Singleton_test2.cpp
new file mode 100644
index 0000000..eb2a9df
--- /dev/null
+++ b/libutils/tests/Singleton_test2.cpp
@@ -0,0 +1,38 @@
+/*
+ * 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.
+ */
+
+#include <utils/Singleton.h>
+
+#include "Singleton_test.h"
+
+namespace android {
+
+// Singleton<SingletonTestStruct> is referenced in Singleton_test1.cpp and
+// Singleton_test2.cpp, but only defined in Singleton_test1.cpp.
+
+void singletonSetInstanceContents(unsigned int contents) {
+    SingletonTestData::getInstance().contents = contents;
+}
+
+unsigned int singletonGetInstanceContents() {
+    return SingletonTestData::getInstance().contents;
+}
+
+bool singletonHasInstance() {
+    return SingletonTestData::hasInstance();
+}
+
+}
diff --git a/logcat/Android.mk b/logcat/Android.mk
index 723c35e..f564f0f 100644
--- a/logcat/Android.mk
+++ b/logcat/Android.mk
@@ -16,7 +16,7 @@
 include $(CLEAR_VARS)
 
 LOCAL_MODULE := liblogcat
-LOCAL_SRC_FILES := logcat.cpp logcat_system.cpp
+LOCAL_SRC_FILES := logcat.cpp getopt_long.cpp logcat_system.cpp
 LOCAL_SHARED_LIBRARIES := $(logcatLibs)
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
diff --git a/logcat/getopt_long.cpp b/logcat/getopt_long.cpp
new file mode 100644
index 0000000..5f8dd66
--- /dev/null
+++ b/logcat/getopt_long.cpp
@@ -0,0 +1,402 @@
+/* $OpenBSD: getopt_long.c,v 1.26 2013/06/08 22:47:56 millert Exp $ */
+/* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $       */
+
+/*
+ * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/cdefs.h>
+
+#include <log/getopt.h>
+
+#define PRINT_ERROR ((context->opterr) && (*options != ':'))
+
+#define FLAG_PERMUTE 0x01  // permute non-options to the end of argv
+#define FLAG_ALLARGS 0x02  // treat non-options as args to option "-1"
+
+// return values
+#define BADCH (int)'?'
+#define BADARG ((*options == ':') ? (int)':' : (int)'?')
+#define INORDER (int)1
+
+#define D_PREFIX 0
+#define DD_PREFIX 1
+#define W_PREFIX 2
+
+// Compute the greatest common divisor of a and b.
+static int gcd(int a, int b) {
+    int c = a % b;
+    while (c) {
+        a = b;
+        b = c;
+        c = a % b;
+    }
+    return b;
+}
+
+// Exchange the block from nonopt_start to nonopt_end with the block from
+// nonopt_end to opt_end (keeping the same order of arguments in each block).
+// Returns optind - (nonopt_end - nonopt_start) for convenience.
+static int permute_args(getopt_context* context, char* const* nargv) {
+    // compute lengths of blocks and number and size of cycles
+    int nnonopts = context->nonopt_end - context->nonopt_start;
+    int nopts = context->optind - context->nonopt_end;
+    int ncycle = gcd(nnonopts, nopts);
+    int cyclelen = (context->optind - context->nonopt_start) / ncycle;
+
+    for (int i = 0; i < ncycle; i++) {
+        int cstart = context->nonopt_end + i;
+        int pos = cstart;
+        for (int j = 0; j < cyclelen; j++) {
+            if (pos >= context->nonopt_end) {
+                pos -= nnonopts;
+            } else {
+                pos += nopts;
+            }
+            char* swap = nargv[pos];
+            const_cast<char**>(nargv)[pos] = nargv[cstart];
+            const_cast<char**>(nargv)[cstart] = swap;
+        }
+    }
+    return context->optind - (context->nonopt_end - context->nonopt_start);
+}
+
+// parse_long_options_r --
+//    Parse long options in argc/argv argument vector.
+// Returns -1 if short_too is set and the option does not match long_options.
+static int parse_long_options_r(char* const* nargv, const char* options,
+                                const struct option* long_options, int* idx,
+                                bool short_too, struct getopt_context* context) {
+    const char* current_argv = context->place;
+    const char* current_dash;
+    switch (context->dash_prefix) {
+        case D_PREFIX:
+            current_dash = "-";
+            break;
+        case DD_PREFIX:
+            current_dash = "--";
+            break;
+        case W_PREFIX:
+            current_dash = "-W ";
+            break;
+        default:
+            current_dash = "";
+            break;
+    }
+    context->optind++;
+
+    const char* has_equal;
+    size_t current_argv_len;
+    if (!!(has_equal = strchr(current_argv, '='))) {
+        // argument found (--option=arg)
+        current_argv_len = has_equal - current_argv;
+        has_equal++;
+    } else {
+        current_argv_len = strlen(current_argv);
+    }
+
+    int match = -1;
+    bool exact_match = false;
+    bool second_partial_match = false;
+    for (int i = 0; long_options[i].name; i++) {
+        // find matching long option
+        if (strncmp(current_argv, long_options[i].name, current_argv_len)) {
+            continue;
+        }
+
+        if (strlen(long_options[i].name) == current_argv_len) {
+            // exact match
+            match = i;
+            exact_match = true;
+            break;
+        }
+        // If this is a known short option, don't allow
+        // a partial match of a single character.
+        if (short_too && current_argv_len == 1) continue;
+
+        if (match == -1) {  // first partial match
+            match = i;
+        } else if (long_options[i].has_arg != long_options[match].has_arg ||
+                   long_options[i].flag != long_options[match].flag ||
+                   long_options[i].val != long_options[match].val) {
+            second_partial_match = true;
+        }
+    }
+    if (!exact_match && second_partial_match) {
+        // ambiguous abbreviation
+        if (PRINT_ERROR) {
+            fprintf(context->optstderr ?: stderr,
+                    "option `%s%.*s' is ambiguous", current_dash,
+                    (int)current_argv_len, current_argv);
+        }
+        context->optopt = 0;
+        return BADCH;
+    }
+    if (match != -1) {  // option found
+        if (long_options[match].has_arg == no_argument && has_equal) {
+            if (PRINT_ERROR) {
+                fprintf(context->optstderr ?: stderr,
+                        "option `%s%.*s' doesn't allow an argument",
+                        current_dash, (int)current_argv_len, current_argv);
+            }
+            // XXX: GNU sets optopt to val regardless of flag
+            context->optopt =
+                long_options[match].flag ? 0 : long_options[match].val;
+            return BADCH;
+        }
+        if (long_options[match].has_arg == required_argument ||
+            long_options[match].has_arg == optional_argument) {
+            if (has_equal) {
+                context->optarg = has_equal;
+            } else if (long_options[match].has_arg == required_argument) {
+                // optional argument doesn't use next nargv
+                context->optarg = nargv[context->optind++];
+            }
+        }
+        if ((long_options[match].has_arg == required_argument) &&
+            !context->optarg) {
+            // Missing argument; leading ':' indicates no error
+            // should be generated.
+            if (PRINT_ERROR) {
+                fprintf(context->optstderr ?: stderr,
+                        "option `%s%s' requires an argument", current_dash,
+                        current_argv);
+            }
+            // XXX: GNU sets optopt to val regardless of flag
+            context->optopt =
+                long_options[match].flag ? 0 : long_options[match].val;
+            context->optind--;
+            return BADARG;
+        }
+    } else {  // unknown option
+        if (short_too) {
+            context->optind--;
+            return -1;
+        }
+        if (PRINT_ERROR) {
+            fprintf(context->optstderr ?: stderr, "unrecognized option `%s%s'",
+                    current_dash, current_argv);
+        }
+        context->optopt = 0;
+        return BADCH;
+    }
+    if (idx) *idx = match;
+    if (long_options[match].flag) {
+        *long_options[match].flag = long_options[match].val;
+        return 0;
+    }
+    return long_options[match].val;
+}
+
+// getopt_long_r --
+//    Parse argc/argv argument vector.
+int getopt_long_r(int nargc, char* const* nargv, const char* options,
+                  const struct option* long_options, int* idx,
+                  struct getopt_context* context) {
+    if (!options) return -1;
+
+    // XXX Some GNU programs (like cvs) set optind to 0 instead of
+    // XXX using optreset.  Work around this braindamage.
+    if (!context->optind) context->optind = context->optreset = 1;
+
+    // Disable GNU extensions if options string begins with a '+'.
+    int flags = FLAG_PERMUTE;
+    if (*options == '-') {
+        flags |= FLAG_ALLARGS;
+    } else if (*options == '+') {
+        flags &= ~FLAG_PERMUTE;
+    }
+    if (*options == '+' || *options == '-') options++;
+
+    context->optarg = nullptr;
+    if (context->optreset) context->nonopt_start = context->nonopt_end = -1;
+start:
+    if (context->optreset || !*context->place) {  // update scanning pointer
+        context->optreset = 0;
+        if (context->optind >= nargc) {  // end of argument vector
+            context->place = EMSG;
+            if (context->nonopt_end != -1) {
+                // do permutation, if we have to
+                context->optind = permute_args(context, nargv);
+            } else if (context->nonopt_start != -1) {
+                // If we skipped non-options, set optind to the first of them.
+                context->optind = context->nonopt_start;
+            }
+            context->nonopt_start = context->nonopt_end = -1;
+            return -1;
+        }
+        if (*(context->place = nargv[context->optind]) != '-' ||
+            context->place[1] == '\0') {
+            context->place = EMSG;  // found non-option
+            if (flags & FLAG_ALLARGS) {
+                // GNU extension: return non-option as argument to option 1
+                context->optarg = nargv[context->optind++];
+                return INORDER;
+            }
+            if (!(flags & FLAG_PERMUTE)) {
+                // If no permutation wanted, stop parsing at first non-option.
+                return -1;
+            }
+            // do permutation
+            if (context->nonopt_start == -1) {
+                context->nonopt_start = context->optind;
+            } else if (context->nonopt_end != -1) {
+                context->nonopt_start = permute_args(context, nargv);
+                context->nonopt_end = -1;
+            }
+            context->optind++;
+            // process next argument
+            goto start;
+        }
+        if (context->nonopt_start != -1 && context->nonopt_end == -1) {
+            context->nonopt_end = context->optind;
+        }
+
+        // If we have "-" do nothing, if "--" we are done.
+        if (context->place[1] != '\0' && *++(context->place) == '-' &&
+            context->place[1] == '\0') {
+            context->optind++;
+            context->place = EMSG;
+            // We found an option (--), so if we skipped
+            // non-options, we have to permute.
+            if (context->nonopt_end != -1) {
+                context->optind = permute_args(context, nargv);
+            }
+            context->nonopt_start = context->nonopt_end = -1;
+            return -1;
+        }
+    }
+
+    int optchar;
+    // Check long options if:
+    //  1) we were passed some
+    //  2) the arg is not just "-"
+    //  3) either the arg starts with -- we are getopt_long_only()
+    if (long_options && context->place != nargv[context->optind] &&
+        (*context->place == '-')) {
+        bool short_too = false;
+        context->dash_prefix = D_PREFIX;
+        if (*context->place == '-') {
+            context->place++;  // --foo long option
+            context->dash_prefix = DD_PREFIX;
+        } else if (*context->place != ':' && strchr(options, *context->place)) {
+            short_too = true;  // could be short option too
+        }
+
+        optchar = parse_long_options_r(nargv, options, long_options, idx,
+                                       short_too, context);
+        if (optchar != -1) {
+            context->place = EMSG;
+            return optchar;
+        }
+    }
+
+    const char* oli;  // option letter list index
+    if ((optchar = (int)*(context->place)++) == (int)':' ||
+        (optchar == (int)'-' && *context->place != '\0') ||
+        !(oli = strchr(options, optchar))) {
+        // If the user specified "-" and  '-' isn't listed in
+        // options, return -1 (non-option) as per POSIX.
+        // Otherwise, it is an unknown option character (or ':').
+        if (optchar == (int)'-' && *context->place == '\0') return -1;
+        if (!*context->place) context->optind++;
+        if (PRINT_ERROR) {
+            fprintf(context->optstderr ?: stderr, "invalid option -- %c",
+                    optchar);
+        }
+        context->optopt = optchar;
+        return BADCH;
+    }
+
+    static const char recargchar[] = "option requires an argument -- %c";
+    if (long_options && optchar == 'W' && oli[1] == ';') {
+        // -W long-option
+        if (*context->place) {                      // no space
+            ;                                       // NOTHING
+        } else if (++(context->optind) >= nargc) {  // no arg
+            context->place = EMSG;
+            if (PRINT_ERROR) {
+                fprintf(context->optstderr ?: stderr, recargchar, optchar);
+            }
+            context->optopt = optchar;
+            return BADARG;
+        } else {  // white space
+            context->place = nargv[context->optind];
+        }
+        context->dash_prefix = W_PREFIX;
+        optchar = parse_long_options_r(nargv, options, long_options, idx, false,
+                                       context);
+        context->place = EMSG;
+        return optchar;
+    }
+    if (*++oli != ':') {  // doesn't take argument
+        if (!*context->place) context->optind++;
+    } else {  // takes (optional) argument
+        context->optarg = nullptr;
+        if (*context->place) {  // no white space
+            context->optarg = context->place;
+        } else if (oli[1] != ':') {              // arg not optional
+            if (++(context->optind) >= nargc) {  // no arg
+                context->place = EMSG;
+                if (PRINT_ERROR) {
+                    fprintf(context->optstderr ?: stderr, recargchar, optchar);
+                }
+                context->optopt = optchar;
+                return BADARG;
+            }
+            context->optarg = nargv[context->optind];
+        }
+        context->place = EMSG;
+        context->optind++;
+    }
+    // dump back option letter
+    return optchar;
+}
diff --git a/logcat/include/log/getopt.h b/logcat/include/log/getopt.h
new file mode 100644
index 0000000..0da2b10
--- /dev/null
+++ b/logcat/include/log/getopt.h
@@ -0,0 +1,67 @@
+/*
+ * 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 _LOG_GETOPT_H_
+#define _LOG_GETOPT_H_
+
+#ifndef __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
+#ifndef __ANDROID_API__
+#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
+#elif __ANDROID_API__ > 24 /* > Nougat */
+#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
+#else
+#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 0
+#endif
+#endif
+
+#if __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
+
+#include <getopt.h>
+#include <sys/cdefs.h>
+
+struct getopt_context {
+    int opterr;
+    int optind;
+    int optopt;
+    int optreset;
+    const char* optarg;
+    FILE* optstderr; /* NULL defaults to stderr */
+    /* private */
+    const char* place;
+    int nonopt_start;
+    int nonopt_end;
+    int dash_prefix;
+    /* expansion space */
+    int __extra__;
+    void* __stuff__;
+};
+
+#define EMSG ""
+#define NO_PREFIX (-1)
+
+#define INIT_GETOPT_CONTEXT(context) \
+    context = { 1, 1, '?', 0, NULL, NULL, EMSG, -1, -1, NO_PREFIX, 0, NULL }
+
+__BEGIN_DECLS
+int getopt_long_r(int nargc, char* const* nargv, const char* options,
+                  const struct option* long_options, int* idx,
+                  struct getopt_context* context);
+
+__END_DECLS
+
+#endif /* __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE */
+
+#endif /* !_LOG_GETOPT_H_ */
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 7f852d4..3cd36f9 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -20,7 +20,6 @@
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <getopt.h>
 #include <math.h>
 #include <pthread.h>
 #include <sched.h>
@@ -47,6 +46,7 @@
 #include <cutils/sched_policy.h>
 #include <cutils/sockets.h>
 #include <log/event_tag_map.h>
+#include <log/getopt.h>
 #include <log/logcat.h>
 #include <log/logprint.h>
 #include <private/android_logger.h>
@@ -67,8 +67,8 @@
     std::vector<const char*> argv_hold;
     std::vector<std::string> envs;
     std::vector<const char*> envp_hold;
-    int output_fd;
-    int error_fd;
+    int output_fd;  // duplication of fileno(output) (below)
+    int error_fd;   // duplication of fileno(error) (below)
 
     // library
     int fds[2];    // From popen call
@@ -108,7 +108,7 @@
 
     context = (android_logcat_context_internal*)calloc(
         1, sizeof(android_logcat_context_internal));
-    if (!context) return NULL;
+    if (!context) return nullptr;
 
     context->fds[0] = -1;
     context->fds[1] = -1;
@@ -139,10 +139,10 @@
     log_device_t(const char* d, bool b) {
         device = d;
         binary = b;
-        next = NULL;
+        next = nullptr;
         printed = false;
-        logger = NULL;
-        logger_list = NULL;
+        logger = nullptr;
+        logger_list = nullptr;
     }
 };
 
@@ -162,7 +162,7 @@
 static void close_output(android_logcat_context_internal* context) {
     // split output_from_error
     if (context->error == context->output) {
-        context->output = NULL;
+        context->output = nullptr;
         context->output_fd = -1;
     }
     if (context->error && (context->output_fd == fileno(context->error))) {
@@ -182,7 +182,7 @@
             }
             fclose(context->output);
         }
-        context->output = NULL;
+        context->output = nullptr;
     }
     if (context->output_fd >= 0) {
         if (context->output_fd != fileno(stdout)) {
@@ -198,7 +198,7 @@
 static void close_error(android_logcat_context_internal* context) {
     // split error_from_output
     if (context->output == context->error) {
-        context->error = NULL;
+        context->error = nullptr;
         context->error_fd = -1;
     }
     if (context->output && (context->error_fd == fileno(context->output))) {
@@ -218,14 +218,12 @@
             }
             fclose(context->error);
         }
-        context->error = NULL;
+        context->error = nullptr;
     }
     if (context->error_fd >= 0) {
         if ((context->error_fd != fileno(stdout)) &&
             (context->error_fd != fileno(stderr))) {
-            if (context->fds[1] == context->error_fd) {
-                context->fds[1] = -1;
-            }
+            if (context->fds[1] == context->error_fd) context->fds[1] = -1;
             close(context->error_fd);
         }
         context->error_fd = -1;
@@ -236,9 +234,7 @@
     int err;
 
     // Can't rotate logs if we're not outputting to a file
-    if (context->outputFileName == NULL) {
-        return;
-    }
+    if (!context->outputFileName) return;
 
     close_output(context);
 
@@ -257,7 +253,7 @@
             "%s.%.*d", context->outputFileName, maxRotationCountDigits, i);
 
         std::string file0;
-        if (i - 1 == 0) {
+        if (!(i - 1)) {
             file0 = android::base::StringPrintf("%s", context->outputFileName);
         } else {
             file0 =
@@ -265,7 +261,7 @@
                                             maxRotationCountDigits, i - 1);
         }
 
-        if ((file0.length() == 0) || (file1.length() == 0)) {
+        if (!file0.length() || !file1.length()) {
             perror("while rotating log files");
             break;
         }
@@ -284,6 +280,15 @@
         return;
     }
     context->output = fdopen(context->output_fd, "web");
+    if (!context->output) {
+        logcat_panic(context, HELP_FALSE, "couldn't fdopen output file");
+        return;
+    }
+    if (context->stderr_stdout) {
+        close_error(context);
+        context->error = context->output;
+        context->error_fd = context->output_fd;
+    }
 
     context->outByteCount = 0;
 }
@@ -296,9 +301,7 @@
 
 static bool regexOk(android_logcat_context_internal* context,
                     const AndroidLogEntry& entry) {
-    if (!context->regex) {
-        return true;
-    }
+    if (!context->regex) return true;
 
     std::string messageString(entry.message, entry.messageLen);
 
@@ -314,7 +317,7 @@
 
     if (dev->binary) {
         if (!context->eventTagMap && !context->hasOpenedEventTagMap) {
-            context->eventTagMap = android_openEventTagMap(NULL);
+            context->eventTagMap = android_openEventTagMap(nullptr);
             context->hasOpenedEventTagMap = true;
         }
         err = android_log_processBinaryLogBuffer(
@@ -325,9 +328,7 @@
     } else {
         err = android_log_processLogBuffer(&buf->entry_v1, &entry);
     }
-    if ((err < 0) && !context->debug) {
-        return;
-    }
+    if ((err < 0) && !context->debug) return;
 
     if (android_log_shouldPrintLine(
             context->logformat, std::string(entry.tag, entry.tagLen).c_str(),
@@ -372,7 +373,7 @@
 
 static void setupOutputAndSchedulingPolicy(
     android_logcat_context_internal* context, bool blocking) {
-    if (context->outputFileName == NULL) return;
+    if (!context->outputFileName) return;
 
     if (blocking) {
         // Lower priority and set to batch scheduling if we are saving
@@ -445,6 +446,8 @@
                     "                  and individually flagged modifying adverbs can be added:\n"
                     "                    color descriptive epoch monotonic printable uid\n"
                     "                    usec UTC year zone\n"
+                    "                  Multiple -v parameters or comma separated list of format and\n"
+                    "                  format modifiers are allowed.\n"
                     // private and undocumented nsec, no signal, too much noise
                     // useful for -T or -t <timestamp> accurate testing though.
                     "  -D, --dividers  Print dividers between each log buffer\n"
@@ -553,10 +556,8 @@
 
     format = android_log_formatFromString(formatString);
 
-    if (format == FORMAT_OFF) {
-        // FORMAT_OFF means invalid string
-        return -1;
-    }
+    // invalid string?
+    if (format == FORMAT_OFF) return -1;
 
     return android_log_setPrintFormat(context->logformat, format);
 }
@@ -583,21 +584,15 @@
 // String to unsigned int, returns -1 if it fails
 static bool getSizeTArg(const char* ptr, size_t* val, size_t min = 0,
                         size_t max = SIZE_MAX) {
-    if (!ptr) {
-        return false;
-    }
+    if (!ptr) return false;
 
     char* endp;
     errno = 0;
     size_t ret = (size_t)strtoll(ptr, &endp, 0);
 
-    if (endp[0] || errno) {
-        return false;
-    }
+    if (endp[0] || errno) return false;
 
-    if ((ret > max) || (ret < min)) {
-        return false;
-    }
+    if ((ret > max) || (ret < min)) return false;
 
     *val = ret;
     return true;
@@ -633,40 +628,30 @@
 
 static char* parseTime(log_time& t, const char* cp) {
     char* ep = t.strptime(cp, "%m-%d %H:%M:%S.%q");
-    if (ep) {
-        return ep;
-    }
+    if (ep) return ep;
     ep = t.strptime(cp, "%Y-%m-%d %H:%M:%S.%q");
-    if (ep) {
-        return ep;
-    }
+    if (ep) return ep;
     return t.strptime(cp, "%s.%q");
 }
 
 // Find last logged line in <outputFileName>, or <outputFileName>.1
-static log_time lastLogTime(char* outputFileName) {
+static log_time lastLogTime(const char* outputFileName) {
     log_time retval(log_time::EPOCH);
-    if (!outputFileName) {
-        return retval;
-    }
+    if (!outputFileName) return retval;
 
     std::string directory;
-    char* file = strrchr(outputFileName, '/');
+    const char* file = strrchr(outputFileName, '/');
     if (!file) {
         directory = ".";
         file = outputFileName;
     } else {
-        *file = '\0';
-        directory = outputFileName;
-        *file = '/';
+        directory = std::string(outputFileName, file - outputFileName);
         ++file;
     }
 
     std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(directory.c_str()),
                                             closedir);
-    if (!dir.get()) {
-        return retval;
-    }
+    if (!dir.get()) return retval;
 
     log_time now(android_log_clockid());
 
@@ -674,10 +659,10 @@
     log_time modulo(0, NS_PER_SEC);
     struct dirent* dp;
 
-    while ((dp = readdir(dir.get())) != NULL) {
-        if ((dp->d_type != DT_REG) || (strncmp(dp->d_name, file, len) != 0) ||
+    while (!!(dp = readdir(dir.get()))) {
+        if ((dp->d_type != DT_REG) || !!strncmp(dp->d_name, file, len) ||
             (dp->d_name[len] && ((dp->d_name[len] != '.') ||
-                                 (strtoll(dp->d_name + 1, NULL, 10) != 1)))) {
+                                 (strtoll(dp->d_name + 1, nullptr, 10) != 1)))) {
             continue;
         }
 
@@ -685,17 +670,13 @@
         file_name += "/";
         file_name += dp->d_name;
         std::string file;
-        if (!android::base::ReadFileToString(file_name, &file)) {
-            continue;
-        }
+        if (!android::base::ReadFileToString(file_name, &file)) continue;
 
         bool found = false;
         for (const auto& line : android::base::Split(file, "\n")) {
             log_time t(log_time::EPOCH);
             char* ep = parseTime(t, line.c_str());
-            if (!ep || (*ep != ' ')) {
-                continue;
-            }
+            if (!ep || (*ep != ' ')) continue;
             // determine the time precision of the logs (eg: msec or usec)
             for (unsigned long mod = 1UL; mod < modulo.tv_nsec; mod *= 10) {
                 if (t.tv_nsec % (mod * 10)) {
@@ -713,13 +694,9 @@
             }
         }
         // We count on the basename file to be the definitive end, so stop here.
-        if (!dp->d_name[len] && found) {
-            break;
-        }
+        if (!dp->d_name[len] && found) break;
     }
-    if (retval == log_time::EPOCH) {
-        return retval;
-    }
+    if (retval == log_time::EPOCH) return retval;
     // tail_time prints matching or higher, round up by the modulo to prevent
     // a replay of the last entry we have just checked.
     retval += modulo;
@@ -727,32 +704,29 @@
 }
 
 const char* getenv(android_logcat_context_internal* context, const char* name) {
-    if (!context->envp || !name || !*name) return NULL;
+    if (!context->envp || !name || !*name) return nullptr;
 
     for (size_t len = strlen(name), i = 0; context->envp[i]; ++i) {
         if (strncmp(context->envp[i], name, len)) continue;
         if (context->envp[i][len] == '=') return &context->envp[i][len + 1];
     }
-    return NULL;
+    return nullptr;
 }
 
 }  // namespace android
 
 void reportErrorName(const char** current, const char* name,
                      bool blockSecurity) {
-    if (*current) {
-        return;
+    if (*current) return;
+    if (!blockSecurity || (android_name_to_log_id(name) != LOG_ID_SECURITY)) {
+        *current = name;
     }
-    if (blockSecurity && (android_name_to_log_id(name) == LOG_ID_SECURITY)) {
-        return;
-    }
-    *current = name;
 }
 
 static int __logcat(android_logcat_context_internal* context) {
     using namespace android;
     int err;
-    int hasSetLogFormat = 0;
+    bool hasSetLogFormat = false;
     bool clearLog = false;
     bool allSelected = false;
     bool getLogSize = false;
@@ -760,11 +734,11 @@
     bool printStatistics = false;
     bool printDividers = false;
     unsigned long setLogSize = 0;
-    char* setPruneList = NULL;
-    char* setId = NULL;
+    const char* setPruneList = nullptr;
+    const char* setId = nullptr;
     int mode = ANDROID_LOG_RDONLY;
     std::string forceFilters;
-    log_device_t* devices = NULL;
+    log_device_t* devices = nullptr;
     log_device_t* dev;
     struct logger_list* logger_list;
     size_t tail_lines = 0;
@@ -774,10 +748,10 @@
 
     // object instantiations before goto's can happen
     log_device_t unexpected("unexpected", false);
-    const char* openDeviceFail = NULL;
-    const char* clearFail = NULL;
-    const char* setSizeFail = NULL;
-    const char* getSizeFail = NULL;
+    const char* openDeviceFail = nullptr;
+    const char* clearFail = nullptr;
+    const char* setSizeFail = nullptr;
+    const char* getSizeFail = nullptr;
     int argc = context->argc;
     char* const* argv = context->argv;
 
@@ -788,6 +762,7 @@
         // Simulate shell stderr redirect parsing
         if ((argv[i][0] != '2') || (argv[i][1] != '>')) continue;
 
+        // Append to file not implemented, just open file
         size_t skip = (argv[i][2] == '>') + 2;
         if (!strcmp(&argv[i][skip], "/dev/null")) {
             context->stderr_null = true;
@@ -799,16 +774,29 @@
                     "stderr redirection to file %s unsupported, skipping\n",
                     &argv[i][skip]);
         }
+        // Only the first one
+        break;
+    }
+
+    const char* filename = nullptr;
+    for (int i = 0; i < argc; ++i) {
+        // Simulate shell stdout redirect parsing
+        if (argv[i][0] != '>') continue;
+
+        // Append to file not implemented, just open file
+        filename = &argv[i][(argv[i][1] == '>') + 1];
+        // Only the first one
+        break;
     }
 
     // Deal with setting up file descriptors and FILE pointers
-    if (context->error_fd >= 0) {
+    if (context->error_fd >= 0) {  // Is an error file descriptor supplied?
         if (context->error_fd == context->output_fd) {
             context->stderr_stdout = true;
-        } else if (context->stderr_null) {
+        } else if (context->stderr_null) {  // redirection told us to close it
             close(context->error_fd);
             context->error_fd = -1;
-        } else {
+        } else {  // All Ok, convert error to a FILE pointer
             context->error = fdopen(context->error_fd, "web");
             if (!context->error) {
                 context->retval = -errno;
@@ -819,22 +807,32 @@
             }
         }
     }
-    if (context->output_fd >= 0) {
-        context->output = fdopen(context->output_fd, "web");
-        if (!context->output) {
-            context->retval = -errno;
-            fprintf(context->stderr_stdout ? stdout : context->error,
-                    "Failed to fdopen(output_fd=%d) %s\n", context->output_fd,
-                    strerror(errno));
-            goto exit;
+    if (context->output_fd >= 0) {  // Is an output file descriptor supplied?
+        if (filename) {  // redirect to file, close supplied file descriptor.
+            close(context->output_fd);
+            context->output_fd = -1;
+        } else {  // All Ok, convert output to a FILE pointer
+            context->output = fdopen(context->output_fd, "web");
+            if (!context->output) {
+                context->retval = -errno;
+                fprintf(context->stderr_stdout ? stdout : context->error,
+                        "Failed to fdopen(output_fd=%d) %s\n",
+                        context->output_fd, strerror(errno));
+                goto exit;
+            }
         }
     }
+    if (filename) {  // We supplied an output file redirected in command line
+        context->output = fopen(filename, "web");
+    }
+    // Deal with 2>&1
     if (context->stderr_stdout) context->error = context->output;
+    // Deal with 2>/dev/null
     if (context->stderr_null) {
         context->error_fd = -1;
-        context->error = NULL;
+        context->error = nullptr;
     }
-    // Only happens if output=stdout
+    // Only happens if output=stdout or output=filename
     if ((context->output_fd < 0) && context->output) {
         context->output_fd = fileno(context->output);
     }
@@ -845,14 +843,21 @@
 
     context->logformat = android_log_format_new();
 
-    if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
+    if (argc == 2 && !strcmp(argv[1], "--help")) {
         show_help(context);
         context->retval = EXIT_SUCCESS;
         goto exit;
     }
 
-    // danger: getopt is _not_ reentrant
-    optind = 1;
+    // meant to catch comma-delimited values, but cast a wider
+    // net for stability dealing with possible mistaken inputs.
+    static const char delimiters[] = ",:; \t\n\r\f";
+
+    struct getopt_context optctx;
+    INIT_GETOPT_CONTEXT(optctx);
+    optctx.opterr = !!context->error;
+    optctx.optstderr = context->error;
+
     for (;;) {
         int ret;
 
@@ -865,52 +870,50 @@
         static const char print_str[] = "print";
         // clang-format off
         static const struct option long_options[] = {
-          { "binary",        no_argument,       NULL,   'B' },
-          { "buffer",        required_argument, NULL,   'b' },
-          { "buffer-size",   optional_argument, NULL,   'g' },
-          { "clear",         no_argument,       NULL,   'c' },
-          { debug_str,       no_argument,       NULL,   0 },
-          { "dividers",      no_argument,       NULL,   'D' },
-          { "file",          required_argument, NULL,   'f' },
-          { "format",        required_argument, NULL,   'v' },
+          { "binary",        no_argument,       nullptr, 'B' },
+          { "buffer",        required_argument, nullptr, 'b' },
+          { "buffer-size",   optional_argument, nullptr, 'g' },
+          { "clear",         no_argument,       nullptr, 'c' },
+          { debug_str,       no_argument,       nullptr, 0 },
+          { "dividers",      no_argument,       nullptr, 'D' },
+          { "file",          required_argument, nullptr, 'f' },
+          { "format",        required_argument, nullptr, 'v' },
           // hidden and undocumented reserved alias for --regex
-          { "grep",          required_argument, NULL,   'e' },
+          { "grep",          required_argument, nullptr, 'e' },
           // hidden and undocumented reserved alias for --max-count
-          { "head",          required_argument, NULL,   'm' },
-          { id_str,          required_argument, NULL,   0 },
-          { "last",          no_argument,       NULL,   'L' },
-          { "max-count",     required_argument, NULL,   'm' },
-          { pid_str,         required_argument, NULL,   0 },
-          { print_str,       no_argument,       NULL,   0 },
-          { "prune",         optional_argument, NULL,   'p' },
-          { "regex",         required_argument, NULL,   'e' },
-          { "rotate-count",  required_argument, NULL,   'n' },
-          { "rotate-kbytes", required_argument, NULL,   'r' },
-          { "statistics",    no_argument,       NULL,   'S' },
+          { "head",          required_argument, nullptr, 'm' },
+          { id_str,          required_argument, nullptr, 0 },
+          { "last",          no_argument,       nullptr, 'L' },
+          { "max-count",     required_argument, nullptr, 'm' },
+          { pid_str,         required_argument, nullptr, 0 },
+          { print_str,       no_argument,       nullptr, 0 },
+          { "prune",         optional_argument, nullptr, 'p' },
+          { "regex",         required_argument, nullptr, 'e' },
+          { "rotate-count",  required_argument, nullptr, 'n' },
+          { "rotate-kbytes", required_argument, nullptr, 'r' },
+          { "statistics",    no_argument,       nullptr, 'S' },
           // hidden and undocumented reserved alias for -t
-          { "tail",          required_argument, NULL,   't' },
+          { "tail",          required_argument, nullptr, 't' },
           // support, but ignore and do not document, the optional argument
-          { wrap_str,        optional_argument, NULL,   0 },
-          { NULL,            0,                 NULL,   0 }
+          { wrap_str,        optional_argument, nullptr, 0 },
+          { nullptr,         0,                 nullptr, 0 }
         };
         // clang-format on
 
-        ret = getopt_long(argc, argv,
-                          ":cdDLt:T:gG:sQf:r:n:v:b:BSpP:m:e:", long_options,
-                          &option_index);
-
-        if (ret < 0) {
-            break;
-        }
+        ret = getopt_long_r(argc, argv,
+                            ":cdDLt:T:gG:sQf:r:n:v:b:BSpP:m:e:", long_options,
+                            &option_index, &optctx);
+        if (ret < 0) break;
 
         switch (ret) {
             case 0:
                 // only long options
                 if (long_options[option_index].name == pid_str) {
                     // ToDo: determine runtime PID_MAX?
-                    if (!getSizeTArg(optarg, &pid, 1)) {
+                    if (!getSizeTArg(optctx.optarg, &pid, 1)) {
                         logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
+                                     long_options[option_index].name,
+                                     optctx.optarg);
                         goto exit;
                     }
                     break;
@@ -920,9 +923,11 @@
                             ANDROID_LOG_NONBLOCK;
                     // ToDo: implement API that supports setting a wrap timeout
                     size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT;
-                    if (optarg && !getSizeTArg(optarg, &dummy, 1)) {
+                    if (optctx.optarg &&
+                        !getSizeTArg(optctx.optarg, &dummy, 1)) {
                         logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
+                                     long_options[option_index].name,
+                                     optctx.optarg);
                         goto exit;
                     }
                     if ((dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) &&
@@ -943,8 +948,8 @@
                     break;
                 }
                 if (long_options[option_index].name == id_str) {
-                    setId = optarg && optarg[0] ? optarg : NULL;
-                    break;
+                    setId = (optctx.optarg && optctx.optarg[0]) ? optctx.optarg
+                                                                : nullptr;
                 }
                 break;
 
@@ -972,12 +977,13 @@
                 mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
             // FALLTHRU
             case 'T':
-                if (strspn(optarg, "0123456789") != strlen(optarg)) {
-                    char* cp = parseTime(tail_time, optarg);
+                if (strspn(optctx.optarg, "0123456789") !=
+                    strlen(optctx.optarg)) {
+                    char* cp = parseTime(tail_time, optctx.optarg);
                     if (!cp) {
                         logcat_panic(context, HELP_FALSE,
                                      "-%c \"%s\" not in time format\n", ret,
-                                     optarg);
+                                     optctx.optarg);
                         goto exit;
                     }
                     if (*cp) {
@@ -987,16 +993,16 @@
                             fprintf(
                                 context->error,
                                 "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
-                                ret, optarg, c, cp + 1);
+                                ret, optctx.optarg, c, cp + 1);
                         }
                         *cp = c;
                     }
                 } else {
-                    if (!getSizeTArg(optarg, &tail_lines, 1)) {
+                    if (!getSizeTArg(optctx.optarg, &tail_lines, 1)) {
                         if (context->error) {
                             fprintf(context->error,
                                     "WARNING: -%c %s invalid, setting to 1\n",
-                                    ret, optarg);
+                                    ret, optctx.optarg);
                         }
                         tail_lines = 1;
                     }
@@ -1008,22 +1014,22 @@
                 break;
 
             case 'e':
-                context->regex = new pcrecpp::RE(optarg);
+                context->regex = new pcrecpp::RE(optctx.optarg);
                 break;
 
             case 'm': {
-                char* end = NULL;
-                if (!getSizeTArg(optarg, &context->maxCount)) {
+                char* end = nullptr;
+                if (!getSizeTArg(optctx.optarg, &context->maxCount)) {
                     logcat_panic(context, HELP_FALSE,
                                  "-%c \"%s\" isn't an "
                                  "integer greater than zero\n",
-                                 ret, optarg);
+                                 ret, optctx.optarg);
                     goto exit;
                 }
             } break;
 
             case 'g':
-                if (!optarg) {
+                if (!optctx.optarg) {
                     getLogSize = true;
                     break;
                 }
@@ -1031,8 +1037,8 @@
 
             case 'G': {
                 char* cp;
-                if (strtoll(optarg, &cp, 0) > 0) {
-                    setLogSize = strtoll(optarg, &cp, 0);
+                if (strtoll(optctx.optarg, &cp, 0) > 0) {
+                    setLogSize = strtoll(optctx.optarg, &cp, 0);
                 } else {
                     setLogSize = 0;
                 }
@@ -1065,50 +1071,50 @@
             } break;
 
             case 'p':
-                if (!optarg) {
+                if (!optctx.optarg) {
                     getPruneList = true;
                     break;
                 }
             // FALLTHRU
 
             case 'P':
-                setPruneList = optarg;
+                setPruneList = optctx.optarg;
                 break;
 
             case 'b': {
+                std::unique_ptr<char, void (*)(void*)> buffers(
+                    strdup(optctx.optarg), free);
+                char* arg = buffers.get();
                 unsigned idMask = 0;
-                while ((optarg = strtok(optarg, ",:; \t\n\r\f")) != NULL) {
-                    if (strcmp(optarg, "default") == 0) {
+                char* sv = nullptr;  // protect against -ENOMEM above
+                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
+                    if (!strcmp(arg, "default")) {
                         idMask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) |
                                   (1 << LOG_ID_CRASH);
-                    } else if (strcmp(optarg, "all") == 0) {
+                    } else if (!strcmp(arg, "all")) {
                         allSelected = true;
                         idMask = (unsigned)-1;
                     } else {
-                        log_id_t log_id = android_name_to_log_id(optarg);
+                        log_id_t log_id = android_name_to_log_id(arg);
                         const char* name = android_log_id_to_name(log_id);
 
-                        if (strcmp(name, optarg) != 0) {
+                        if (!!strcmp(name, arg)) {
                             logcat_panic(context, HELP_TRUE,
-                                         "unknown buffer %s\n", optarg);
+                                         "unknown buffer %s\n", arg);
                             goto exit;
                         }
                         if (log_id == LOG_ID_SECURITY) allSelected = false;
                         idMask |= (1 << log_id);
                     }
-                    optarg = NULL;
+                    arg = nullptr;
                 }
 
                 for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
                     const char* name = android_log_id_to_name((log_id_t)i);
                     log_id_t log_id = android_name_to_log_id(name);
 
-                    if (log_id != (log_id_t)i) {
-                        continue;
-                    }
-                    if ((idMask & (1 << i)) == 0) {
-                        continue;
-                    }
+                    if (log_id != (log_id_t)i) continue;
+                    if (!(idMask & (1 << i))) continue;
 
                     bool found = false;
                     for (dev = devices; dev; dev = dev->next) {
@@ -1116,13 +1122,9 @@
                             found = true;
                             break;
                         }
-                        if (!dev->next) {
-                            break;
-                        }
+                        if (!dev->next) break;
                     }
-                    if (found) {
-                        continue;
-                    }
+                    if (found) continue;
 
                     bool binary =
                         !strcmp(name, "events") || !strcmp(name, "security");
@@ -1143,43 +1145,55 @@
                 break;
 
             case 'f':
-                if ((tail_time == log_time::EPOCH) && (tail_lines == 0)) {
-                    tail_time = lastLogTime(optarg);
+                if ((tail_time == log_time::EPOCH) && !tail_lines) {
+                    tail_time = lastLogTime(optctx.optarg);
                 }
                 // redirect output to a file
-                context->outputFileName = optarg;
+                context->outputFileName = optctx.optarg;
                 break;
 
             case 'r':
-                if (!getSizeTArg(optarg, &context->logRotateSizeKBytes, 1)) {
+                if (!getSizeTArg(optctx.optarg, &context->logRotateSizeKBytes,
+                                 1)) {
                     logcat_panic(context, HELP_TRUE,
-                                 "Invalid parameter \"%s\" to -r\n", optarg);
+                                 "Invalid parameter \"%s\" to -r\n",
+                                 optctx.optarg);
                     goto exit;
                 }
                 break;
 
             case 'n':
-                if (!getSizeTArg(optarg, &context->maxRotatedLogs, 1)) {
+                if (!getSizeTArg(optctx.optarg, &context->maxRotatedLogs, 1)) {
                     logcat_panic(context, HELP_TRUE,
-                                 "Invalid parameter \"%s\" to -n\n", optarg);
+                                 "Invalid parameter \"%s\" to -n\n",
+                                 optctx.optarg);
                     goto exit;
                 }
                 break;
 
-            case 'v':
-                if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) {
+            case 'v': {
+                if (!strcmp(optctx.optarg, "help") ||
+                    !strcmp(optctx.optarg, "--help")) {
                     show_format_help(context);
                     context->retval = EXIT_SUCCESS;
                     goto exit;
                 }
-                err = setLogFormat(context, optarg);
-                if (err < 0) {
-                    logcat_panic(context, HELP_FORMAT,
-                                 "Invalid parameter \"%s\" to -v\n", optarg);
-                    goto exit;
+                std::unique_ptr<char, void (*)(void*)> formats(
+                    strdup(optctx.optarg), free);
+                char* arg = formats.get();
+                unsigned idMask = 0;
+                char* sv = nullptr;  // protect against -ENOMEM above
+                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
+                    err = setLogFormat(context, arg);
+                    if (err < 0) {
+                        logcat_panic(context, HELP_FORMAT,
+                                     "Invalid parameter \"%s\" to -v\n", arg);
+                        goto exit;
+                    }
+                    arg = nullptr;
+                    if (err) hasSetLogFormat = true;
                 }
-                hasSetLogFormat |= err;
-                break;
+            } break;
 
             case 'Q':
 #define KERNEL_OPTION "androidboot.logcat="
@@ -1245,12 +1259,12 @@
 
             case ':':
                 logcat_panic(context, HELP_TRUE,
-                             "Option -%c needs an argument\n", optopt);
+                             "Option -%c needs an argument\n", optctx.optopt);
                 goto exit;
 
             default:
                 logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n",
-                             optopt);
+                             optctx.optopt);
                 goto exit;
         }
     }
@@ -1286,13 +1300,13 @@
         }
     }
 
-    if (context->logRotateSizeKBytes != 0 && context->outputFileName == NULL) {
+    if (!!context->logRotateSizeKBytes && !context->outputFileName) {
         logcat_panic(context, HELP_TRUE, "-r requires -f as well\n");
         goto exit;
     }
 
-    if (setId != NULL) {
-        if (context->outputFileName == NULL) {
+    if (!!setId) {
+        if (!context->outputFileName) {
             logcat_panic(context, HELP_TRUE,
                          "--id='%s' requires -f as well\n", setId);
             goto exit;
@@ -1304,22 +1318,29 @@
         bool file_ok = android::base::ReadFileToString(file_name, &file);
         android::base::WriteStringToFile(setId, file_name, S_IRUSR | S_IWUSR,
                                          getuid(), getgid());
-        if (!file_ok || (file.compare(setId) == 0)) {
-            setId = NULL;
-        }
+        if (!file_ok || !file.compare(setId)) setId = nullptr;
     }
 
-    if (hasSetLogFormat == 0) {
+    if (!hasSetLogFormat) {
         const char* logFormat = android::getenv(context, "ANDROID_PRINTF_LOG");
 
-        if (logFormat != NULL) {
-            err = setLogFormat(context, logFormat);
-            if ((err < 0) && context->error) {
-                fprintf(context->error,
-                        "invalid format in ANDROID_PRINTF_LOG '%s'\n",
-                        logFormat);
+        if (!!logFormat) {
+            std::unique_ptr<char, void (*)(void*)> formats(strdup(logFormat),
+                                                           free);
+            char* sv = nullptr;  // protect against -ENOMEM above
+            char* arg = formats.get();
+            while (!!(arg = strtok_r(arg, delimiters, &sv))) {
+                err = setLogFormat(context, arg);
+                // environment should not cause crash of logcat
+                if ((err < 0) && context->error) {
+                    fprintf(context->error,
+                            "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg);
+                }
+                arg = nullptr;
+                if (err > 0) hasSetLogFormat = true;
             }
-        } else {
+        }
+        if (!hasSetLogFormat) {
             setLogFormat(context, "threadtime");
         }
     }
@@ -1332,11 +1353,11 @@
                          "Invalid filter expression in logcat args\n");
             goto exit;
         }
-    } else if (argc == optind) {
+    } else if (argc == optctx.optind) {
         // Add from environment variable
         const char* env_tags_orig = android::getenv(context, "ANDROID_LOG_TAGS");
 
-        if (env_tags_orig != NULL) {
+        if (!!env_tags_orig) {
             err = android_log_addFilterString(context->logformat,
                                               env_tags_orig);
 
@@ -1348,9 +1369,11 @@
         }
     } else {
         // Add from commandline
-        for (int i = optind ; i < argc ; i++) {
+        for (int i = optctx.optind ; i < argc ; i++) {
             // skip stderr redirections of _all_ kinds
             if ((argv[i][0] == '2') && (argv[i][1] == '>')) continue;
+            // skip stdout redirections of _all_ kinds
+            if (argv[i][0] == '>') continue;
 
             err = android_log_addFilterString(context->logformat, argv[i]);
             if (err < 0) {
@@ -1389,7 +1412,7 @@
                 for (int i = context->maxRotatedLogs ; i >= 0 ; --i) {
                     std::string file;
 
-                    if (i == 0) {
+                    if (!i) {
                         file = android::base::StringPrintf(
                             "%s", context->outputFileName);
                     } else {
@@ -1397,7 +1420,7 @@
                             context->outputFileName, maxRotationCountDigits, i);
                     }
 
-                    if (file.length() == 0) {
+                    if (!file.length()) {
                         perror("while clearing log files");
                         reportErrorName(&clearFail, dev->device, allSelected);
                         break;
@@ -1405,7 +1428,7 @@
 
                     err = unlink(file.c_str());
 
-                    if (err < 0 && errno != ENOENT && clearFail == NULL) {
+                    if (err < 0 && errno != ENOENT && !clearFail) {
                         perror("while clearing log files");
                         reportErrorName(&clearFail, dev->device, allSelected);
                     }
@@ -1472,7 +1495,7 @@
         size_t len = strlen(setPruneList);
         // extra 32 bytes are needed by android_logger_set_prune_list
         size_t bLen = len + 32;
-        char* buf = NULL;
+        char* buf = nullptr;
         if (asprintf(&buf, "%-*s", (int)(bLen - 1), setPruneList) > 0) {
             buf[len] = '\0';
             if (android_logger_set_prune_list(logger_list, buf, bLen)) {
@@ -1492,7 +1515,7 @@
         char* buf;
 
         for (int retry = 32; (retry >= 0) && ((buf = new char[len]));
-             delete[] buf, buf = NULL, --retry) {
+             delete[] buf, buf = nullptr, --retry) {
             if (getPruneList) {
                 android_logger_get_prune_list(logger_list, buf, len);
             } else {
@@ -1501,7 +1524,7 @@
             buf[len - 1] = '\0';
             if (atol(buf) < 3) {
                 delete[] buf;
-                buf = NULL;
+                buf = nullptr;
                 break;
             }
             size_t ret = atol(buf) + 1;
@@ -1521,19 +1544,13 @@
         char* cp = buf + len - 1;
         *cp = '\0';
         bool truncated = *--cp != '\f';
-        if (!truncated) {
-            *cp = '\0';
-        }
+        if (!truncated) *cp = '\0';
 
         // squash out the byte count
         cp = buf;
         if (!truncated) {
-            while (isdigit(*cp)) {
-                ++cp;
-            }
-            if (*cp == '\n') {
-                ++cp;
-            }
+            while (isdigit(*cp)) ++cp;
+            if (*cp == '\n') ++cp;
         }
 
         len = strlen(cp);
@@ -1542,32 +1559,28 @@
         goto close;
     }
 
-    if (getLogSize || setLogSize || clearLog) {
-        goto close;
-    }
+    if (getLogSize || setLogSize || clearLog) goto close;
 
-    setupOutputAndSchedulingPolicy(context, (mode & ANDROID_LOG_NONBLOCK) == 0);
+    setupOutputAndSchedulingPolicy(context, !(mode & ANDROID_LOG_NONBLOCK));
     if (context->stop) goto close;
 
     // LOG_EVENT_INT(10, 12345);
     // LOG_EVENT_LONG(11, 0x1122334455667788LL);
     // LOG_EVENT_STRING(0, "whassup, doc?");
 
-    dev = NULL;
+    dev = nullptr;
 
     while (!context->stop &&
            (!context->maxCount || (context->printCount < context->maxCount))) {
         struct log_msg log_msg;
         int ret = android_logger_list_read(logger_list, &log_msg);
-        if (ret == 0) {
+        if (!ret) {
             logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
             break;
         }
 
         if (ret < 0) {
-            if (ret == -EAGAIN) {
-                break;
-            }
+            if (ret == -EAGAIN) break;
 
             if (ret == -EIO) {
                 logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
@@ -1583,9 +1596,7 @@
 
         log_device_t* d;
         for (d = devices; d; d = d->next) {
-            if (android_name_to_log_id(d->device) == log_msg.id()) {
-                break;
-            }
+            if (android_name_to_log_id(d->device) == log_msg.id()) break;
         }
         if (!d) {
             context->devCount = 2; // set to Multiple
@@ -1651,9 +1662,7 @@
     android_logcat_context_internal* context = ctx;
 
     int save_errno = EBUSY;
-    if ((context->fds[0] >= 0) || (context->fds[1] >= 0)) {
-        goto exit;
-    }
+    if ((context->fds[0] >= 0) || (context->fds[1] >= 0)) goto exit;
 
     if (pipe(context->fds) < 0) {
         save_errno = errno;
@@ -1690,11 +1699,11 @@
     for (auto& str : context->args) {
         context->argv_hold.push_back(str.c_str());
     }
-    context->argv_hold.push_back(NULL);
+    context->argv_hold.push_back(nullptr);
     for (auto& str : context->envs) {
         context->envp_hold.push_back(str.c_str());
     }
-    context->envp_hold.push_back(NULL);
+    context->envp_hold.push_back(nullptr);
 
     context->argc = context->argv_hold.size() - 1;
     context->argv = (char* const*)&context->argv_hold[0];
@@ -1703,7 +1712,7 @@
 #ifdef DEBUG
     fprintf(stderr, "argv[%d] = {", context->argc);
     for (auto str : context->argv_hold) {
-        fprintf(stderr, " \"%s\"", str ?: "NULL");
+        fprintf(stderr, " \"%s\"", str ?: "nullptr");
     }
     fprintf(stderr, " }\n");
     fflush(stderr);
@@ -1749,11 +1758,14 @@
 int android_logcat_destroy(android_logcat_context* ctx) {
     android_logcat_context_internal* context = *ctx;
 
-    *ctx = NULL;
+    if (!context) return -EBADF;
+
+    *ctx = nullptr;
 
     context->stop = true;
 
     while (context->thread_stopped == false) {
+        // Makes me sad, replace thread_stopped with semaphore.  Short lived.
         sched_yield();
     }
 
diff --git a/logcat/tests/Android.mk b/logcat/tests/Android.mk
index 1c3feba..22aca17 100644
--- a/logcat/tests/Android.mk
+++ b/logcat/tests/Android.mk
@@ -27,11 +27,12 @@
     -fno-builtin \
 
 # -----------------------------------------------------------------------------
-# Benchmarks (actually a gTest where the result code does not matter)
+# Benchmarks
 # ----------------------------------------------------------------------------
 
 benchmark_src_files := \
-    logcat_benchmark.cpp
+    logcat_benchmark.cpp \
+    exec_benchmark.cpp \
 
 # Build benchmarks for the device. Run with:
 #   adb shell /data/nativetest/logcat-benchmarks/logcat-benchmarks
@@ -40,7 +41,8 @@
 LOCAL_MODULE_TAGS := $(test_tags)
 LOCAL_CFLAGS += $(test_c_flags)
 LOCAL_SRC_FILES := $(benchmark_src_files)
-include $(BUILD_NATIVE_TEST)
+LOCAL_SHARED_LIBRARIES := libbase liblogcat
+include $(BUILD_NATIVE_BENCHMARK)
 
 # -----------------------------------------------------------------------------
 # Unit tests.
diff --git a/logcat/tests/exec_benchmark.cpp b/logcat/tests/exec_benchmark.cpp
new file mode 100644
index 0000000..c30a5f5
--- /dev/null
+++ b/logcat/tests/exec_benchmark.cpp
@@ -0,0 +1,96 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+
+#include <android-base/file.h>
+#include <benchmark/benchmark.h>
+#include <log/logcat.h>
+
+// Dump the statistics and report results
+
+static void logcat_popen_libc(benchmark::State& state, const char* cmd) {
+    while (state.KeepRunning()) {
+        FILE* fp = popen(cmd, "r");
+        std::string ret;
+        android::base::ReadFdToString(fileno(fp), &ret);
+        pclose(fp);
+    }
+}
+
+static void BM_logcat_stat_popen_libc(benchmark::State& state) {
+    logcat_popen_libc(state, "logcat -b all -S");
+}
+BENCHMARK(BM_logcat_stat_popen_libc);
+
+static void logcat_popen_liblogcat(benchmark::State& state, const char* cmd) {
+    while (state.KeepRunning()) {
+        android_logcat_context ctx;
+        FILE* fp = android_logcat_popen(&ctx, cmd);
+        std::string ret;
+        android::base::ReadFdToString(fileno(fp), &ret);
+        android_logcat_pclose(&ctx, fp);
+    }
+}
+
+static void BM_logcat_stat_popen_liblogcat(benchmark::State& state) {
+    logcat_popen_liblogcat(state, "logcat -b all -S");
+}
+BENCHMARK(BM_logcat_stat_popen_liblogcat);
+
+static void logcat_system_libc(benchmark::State& state, const char* cmd) {
+    while (state.KeepRunning()) {
+        system(cmd);
+    }
+}
+
+static void BM_logcat_stat_system_libc(benchmark::State& state) {
+    logcat_system_libc(state, "logcat -b all -S >/dev/null 2>/dev/null");
+}
+BENCHMARK(BM_logcat_stat_system_libc);
+
+static void logcat_system_liblogcat(benchmark::State& state, const char* cmd) {
+    while (state.KeepRunning()) {
+        android_logcat_system(cmd);
+    }
+}
+
+static void BM_logcat_stat_system_liblogcat(benchmark::State& state) {
+    logcat_system_liblogcat(state, "logcat -b all -S >/dev/null 2>/dev/null");
+}
+BENCHMARK(BM_logcat_stat_system_liblogcat);
+
+// Dump the logs and report results
+
+static void BM_logcat_dump_popen_libc(benchmark::State& state) {
+    logcat_popen_libc(state, "logcat -b all -d");
+}
+BENCHMARK(BM_logcat_dump_popen_libc);
+
+static void BM_logcat_dump_popen_liblogcat(benchmark::State& state) {
+    logcat_popen_liblogcat(state, "logcat -b all -d");
+}
+BENCHMARK(BM_logcat_dump_popen_liblogcat);
+
+static void BM_logcat_dump_system_libc(benchmark::State& state) {
+    logcat_system_libc(state, "logcat -b all -d >/dev/null 2>/dev/null");
+}
+BENCHMARK(BM_logcat_dump_system_libc);
+
+static void BM_logcat_dump_system_liblogcat(benchmark::State& state) {
+    logcat_system_liblogcat(state, "logcat -b all -d >/dev/null 2>/dev/null");
+}
+BENCHMARK(BM_logcat_dump_system_liblogcat);
diff --git a/logcat/tests/logcat_benchmark.cpp b/logcat/tests/logcat_benchmark.cpp
index dd85164..8d88628 100644
--- a/logcat/tests/logcat_benchmark.cpp
+++ b/logcat/tests/logcat_benchmark.cpp
@@ -18,19 +18,22 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <gtest/gtest.h>
+#include <benchmark/benchmark.h>
 
 static const char begin[] = "--------- beginning of ";
 
-TEST(logcat, sorted_order) {
-    FILE *fp;
+static void BM_logcat_sorted_order(benchmark::State& state) {
+    FILE* fp;
 
-    ASSERT_TRUE(NULL != (fp = popen(
-      "logcat -v time -b radio -b events -b system -b main -d 2>/dev/null",
-      "r")));
+    if (!state.KeepRunning()) return;
+
+    fp = popen(
+        "logcat -v time -b radio -b events -b system -b main -d 2>/dev/null",
+        "r");
+    if (!fp) return;
 
     class timestamp {
-    private:
+       private:
         int month;
         int day;
         int hour;
@@ -39,44 +42,39 @@
         int millisecond;
         bool ok;
 
-    public:
-        void init(const char *buffer)
-        {
+       public:
+        void init(const char* buffer) {
             ok = false;
             if (buffer != NULL) {
-                ok = sscanf(buffer, "%d-%d %d:%d:%d.%d ",
-                    &month, &day, &hour, &minute, &second, &millisecond) == 6;
+                ok = sscanf(buffer, "%d-%d %d:%d:%d.%d ", &month, &day, &hour,
+                            &minute, &second, &millisecond) == 6;
             }
         }
 
-        explicit timestamp(const char *buffer)
-        {
+        explicit timestamp(const char* buffer) {
             init(buffer);
         }
 
-        bool operator< (timestamp &T)
-        {
-            return !ok || !T.ok
-             || (month < T.month)
-             || ((month == T.month)
-              && ((day < T.day)
-               || ((day == T.day)
-                && ((hour < T.hour)
-                 || ((hour == T.hour)
-                  && ((minute < T.minute)
-                   || ((minute == T.minute)
-                    && ((second < T.second)
-                     || ((second == T.second)
-                      && (millisecond < T.millisecond))))))))));
+        bool operator<(timestamp& T) {
+            return !ok || !T.ok || (month < T.month) ||
+                   ((month == T.month) &&
+                    ((day < T.day) ||
+                     ((day == T.day) &&
+                      ((hour < T.hour) ||
+                       ((hour == T.hour) &&
+                        ((minute < T.minute) ||
+                         ((minute == T.minute) &&
+                          ((second < T.second) ||
+                           ((second == T.second) &&
+                            (millisecond < T.millisecond))))))))));
         }
 
-        bool valid(void)
-        {
+        bool valid(void) {
             return ok;
         }
     } last(NULL);
 
-    char *last_buffer = NULL;
+    char* last_buffer = NULL;
     char buffer[5120];
 
     int count = 0;
@@ -114,15 +112,22 @@
 
     // Allow few fails, happens with readers active
     fprintf(stderr, "%s: %d/%d out of order entries\n",
-            (next_lt_last)
-                ? ((next_lt_last <= max_ok)
-                    ? "WARNING"
-                    : "ERROR")
-                : "INFO",
+            (next_lt_last) ? ((next_lt_last <= max_ok) ? "WARNING" : "ERROR")
+                           : "INFO",
             next_lt_last, count);
 
-    EXPECT_GE(max_ok, next_lt_last);
+    if (next_lt_last > max_ok) {
+        fprintf(stderr, "EXPECT_GE(max_ok=%d, next_lt_last=%d)\n", max_ok,
+                next_lt_last);
+    }
 
     // sample statistically too small
-    EXPECT_LT(100, count);
+    if (count < 100) {
+        fprintf(stderr, "EXPECT_LT(100, count=%d)\n", count);
+    }
+
+    state.KeepRunning();
 }
+BENCHMARK(BM_logcat_sorted_order);
+
+BENCHMARK_MAIN();
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 7d0c87d..03f878a 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -116,6 +116,12 @@
   EXPORT_GLOBAL_ASAN_OPTIONS := export ASAN_OPTIONS include=/system/asan.options
   LOCAL_REQUIRED_MODULES := asan.options $(ASAN_OPTIONS_FILES)
 endif
+
+EXPORT_GLOBAL_GCOV_OPTIONS :=
+ifeq ($(NATIVE_COVERAGE),true)
+  EXPORT_GLOBAL_GCOV_OPTIONS := export GCOV_PREFIX /data/misc/gcov
+endif
+
 # Put it here instead of in init.rc module definition,
 # because init.rc is conditionally included.
 #
@@ -163,6 +169,7 @@
 	$(hide) sed -e 's?%BOOTCLASSPATH%?$(PRODUCT_BOOTCLASSPATH)?g' $< >$@
 	$(hide) sed -i -e 's?%SYSTEMSERVERCLASSPATH%?$(PRODUCT_SYSTEM_SERVER_CLASSPATH)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_ASAN_OPTIONS%?$(EXPORT_GLOBAL_ASAN_OPTIONS)?g' $@
+	$(hide) sed -i -e 's?%EXPORT_GLOBAL_GCOV_OPTIONS%?$(EXPORT_GLOBAL_GCOV_OPTIONS)?g' $@
 
 bcp_md5 :=
 bcp_dep :=
diff --git a/rootdir/init.environ.rc.in b/rootdir/init.environ.rc.in
index 32817fa..2e2ab74 100644
--- a/rootdir/init.environ.rc.in
+++ b/rootdir/init.environ.rc.in
@@ -10,3 +10,4 @@
     export BOOTCLASSPATH %BOOTCLASSPATH%
     export SYSTEMSERVERCLASSPATH %SYSTEMSERVERCLASSPATH%
     %EXPORT_GLOBAL_ASAN_OPTIONS%
+    %EXPORT_GLOBAL_GCOV_OPTIONS%
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 1e5fa50..757e1ff 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -408,6 +408,7 @@
     mkdir /data/misc/profiles/cur 0771 system system
     mkdir /data/misc/profiles/ref 0771 system system
     mkdir /data/misc/profman 0770 system shell
+    mkdir /data/misc/gcov 0770 root root
 
     # For security reasons, /data/local/tmp should always be empty.
     # Do not place files or directories in /data/local/tmp