diff --git a/cmds/dumpstate/DumpstateUtil.cpp b/cmds/dumpstate/DumpstateUtil.cpp
index 97c8ae2..4b69607 100644
--- a/cmds/dumpstate/DumpstateUtil.cpp
+++ b/cmds/dumpstate/DumpstateUtil.cpp
@@ -378,34 +378,6 @@
     return status;
 }
 
-int GetPidByName(const std::string& ps_name) {
-    DIR* proc_dir;
-    struct dirent* ps;
-    unsigned int pid;
-    std::string cmdline;
-
-    if (!(proc_dir = opendir("/proc"))) {
-        MYLOGE("Can't open /proc\n");
-        return -1;
-    }
-
-    while ((ps = readdir(proc_dir))) {
-        if (!(pid = atoi(ps->d_name))) {
-            continue;
-        }
-        android::base::ReadFileToString("/proc/" + std::string(ps->d_name) + "/cmdline", &cmdline);
-        if (cmdline.find(ps_name) == std::string::npos) {
-            continue;
-        } else {
-            closedir(proc_dir);
-            return pid;
-        }
-    }
-    MYLOGE("can't find the pid\n");
-    closedir(proc_dir);
-    return -1;
-}
-
 }  // namespace dumpstate
 }  // namespace os
 }  // namespace android
diff --git a/cmds/dumpstate/DumpstateUtil.h b/cmds/dumpstate/DumpstateUtil.h
index d75b08c..b7ac25c 100644
--- a/cmds/dumpstate/DumpstateUtil.h
+++ b/cmds/dumpstate/DumpstateUtil.h
@@ -205,12 +205,6 @@
  */
 int DumpFileToFd(int fd, const std::string& title, const std::string& path);
 
-/*
- * Finds the process id by process name.
- * |ps_name| the process name we want to search for
- */
-int GetPidByName(const std::string& ps_name);
-
 }  // namespace dumpstate
 }  // namespace os
 }  // namespace android
diff --git a/cmds/dumpstate/tests/dumpstate_test.cpp b/cmds/dumpstate/tests/dumpstate_test.cpp
index 0e88e43..4e6b084 100644
--- a/cmds/dumpstate/tests/dumpstate_test.cpp
+++ b/cmds/dumpstate/tests/dumpstate_test.cpp
@@ -1406,14 +1406,6 @@
         return status;
     }
 
-    // Find out the pid of the process_name
-    int FindPidOfProcess(const std::string& process_name) {
-        CaptureStderr();
-        int status = GetPidByName(process_name);
-        err = GetCapturedStderr();
-        return status;
-    }
-
     int fd;
 
     // 'fd` output and `stderr` from the last command ran.
@@ -1763,18 +1755,6 @@
     EXPECT_THAT(out, EndsWith("skipped on dry run\n"));
 }
 
-TEST_F(DumpstateUtilTest, FindingPidWithExistingProcess) {
-    // init process always has pid 1.
-    EXPECT_EQ(1, FindPidOfProcess("init"));
-    EXPECT_THAT(err, IsEmpty());
-}
-
-TEST_F(DumpstateUtilTest, FindingPidWithNotExistingProcess) {
-    // find the process with abnormal name.
-    EXPECT_EQ(-1, FindPidOfProcess("abcdef12345-543"));
-    EXPECT_THAT(err, StrEq("can't find the pid\n"));
-}
-
 }  // namespace dumpstate
 }  // namespace os
 }  // namespace android
diff --git a/cmds/dumpstate/utils.cpp b/cmds/dumpstate/utils.cpp
index 4cbf577..e08c806 100644
--- a/cmds/dumpstate/utils.cpp
+++ b/cmds/dumpstate/utils.cpp
@@ -725,7 +725,11 @@
         return -1;
     }
     fcntl(s, F_SETFD, FD_CLOEXEC);
-    if (listen(s, 4) < 0) {
+
+    // Set backlog to 0 to make sure that queue size will be minimum.
+    // In Linux, because the minimum queue will be 1, connect() will be blocked
+    // if the other clients already called connect() and the connection request was not accepted.
+    if (listen(s, 0) < 0) {
         MYLOGE("listen(control socket): %s\n", strerror(errno));
         return -1;
     }
@@ -736,6 +740,9 @@
 
     // Close socket just after accept(), to make sure that connect() by client will get error
     // when the socket is used by the other services.
+    // There is still a race condition possibility between accept and close, but there is no way
+    // to close-on-accept atomically.
+    // See detail; b/123306389#comment25
     close(s);
 
     if (fd < 0) {
diff --git a/cmds/installd/otapreopt_chroot.cpp b/cmds/installd/otapreopt_chroot.cpp
index 0c4badf..b4bcd53 100644
--- a/cmds/installd/otapreopt_chroot.cpp
+++ b/cmds/installd/otapreopt_chroot.cpp
@@ -236,6 +236,18 @@
     // the Android Runtime APEX, as it is required by otapreopt to run dex2oat.
     std::vector<apex::ApexFile> active_packages = ActivateApexPackages();
 
+    // Check that an Android Runtime APEX has been activated; clean up and exit
+    // early otherwise.
+    if (std::none_of(active_packages.begin(),
+                     active_packages.end(),
+                     [](const apex::ApexFile& package){
+                         return package.GetManifest().name() == "com.android.runtime";
+                     })) {
+        LOG(FATAL_WITHOUT_ABORT) << "No activated com.android.runtime APEX package.";
+        DeactivateApexPackages(active_packages);
+        exit(217);
+    }
+
     // Now go on and run otapreopt.
 
     // Incoming:  cmd + status-fd + target-slot + cmd...      | Incoming | = argc
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index acc6bf4..3b889fb 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -953,7 +953,7 @@
     if (err >= NO_ERROR) {
         if (bwr.write_consumed > 0) {
             if (bwr.write_consumed < mOut.dataSize())
-                mOut.remove(0, bwr.write_consumed);
+                LOG_ALWAYS_FATAL("Driver did not consume write buffer");
             else {
                 mOut.setDataSize(0);
                 processPostWriteDerefs();
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 7ccb171..a1ddec8 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -622,11 +622,6 @@
     }
 }
 
-const binder_size_t* Parcel::objects() const
-{
-    return mObjects;
-}
-
 size_t Parcel::objectsCount() const
 {
     return mObjectsSize;
@@ -1345,11 +1340,6 @@
     return status.writeToParcel(this);
 }
 
-void Parcel::remove(size_t /*start*/, size_t /*amt*/)
-{
-    LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!");
-}
-
 status_t Parcel::validateReadData(size_t upperBound) const
 {
     // Don't allow non-object reads on object data
@@ -2388,7 +2378,7 @@
     } else if (dataSize() > 0) {
         const uint8_t* DATA = data();
         to << indent << HexDump(DATA, dataSize()) << dedent;
-        const binder_size_t* OBJS = objects();
+        const binder_size_t* OBJS = mObjects;
         const size_t N = objectsCount();
         for (size_t i=0; i<N; i++) {
             const flat_binder_object* flat
diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index 7cd067e..117b90a 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -97,10 +97,6 @@
 
     void                freeData();
 
-private:
-    const binder_size_t* objects() const;
-
-public:
     size_t              objectsCount() const;
     
     status_t            errorCheck() const;
@@ -237,8 +233,6 @@
     // Currently the native implementation doesn't do any of the StrictMode
     // stack gathering and serialization that the Java implementation does.
     status_t            writeNoException();
-
-    void                remove(size_t start, size_t amt);
     
     status_t            read(void* outData, size_t len) const;
     const void*         readInplace(size_t len) const;
diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index b465681..edbe05e 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -71,6 +71,7 @@
         "libbinder",
         "libutils",
     ],
+    test_suites: ["device-tests"],
 }
 
 cc_test {
@@ -136,4 +137,5 @@
         "liblog",
         "libutils",
     ],
+    test_suites: ["device-tests"],
 }