Merge "Fix handling of wrapped processes [part 2]"

package com.android.internal.os;

import static android.system.OsConstants.POLLIN;

import static android.system.OsConstants.POLLOUT;

import static android.system.OsConstants.S_IRWXG;

import static android.system.OsConstants.S_IRWXO;

        long startTime = SystemClock.uptimeMillis();

        // Drop root perms while running static initializers.

        final int reuid = Os.getuid();

        final int regid = Os.getgid();

        // We need to drop root perms only if we're already root. In the case of "wrapped"

        // processes (see WrapperInit), this function is called from an unprivileged uid

        // and gid.

        boolean droppedPriviliges = false;

        if (reuid == ROOT_UID && regid == ROOT_GID) {

            try {

                Os.setregid(ROOT_GID, UNPRIVILEGED_GID);

                Os.setreuid(ROOT_UID, UNPRIVILEGED_UID);

                throw new RuntimeException("Failed to drop root", ex);

            }

            droppedPriviliges = true;

        }

        // Alter the target heap utilization.  With explicit GCs this

        // is not likely to have any effect.

        float defaultUtilization = runtime.getTargetHeapUtilization();

            // Fill in dex caches with classes, fields, and methods brought in by preloading.

            runtime.preloadDexCaches();

            // Bring back root. We'll need it later.

            // Bring back root. We'll need it later if we're in the zygote.

            if (droppedPriviliges) {

                try {

                    Os.setreuid(ROOT_UID, ROOT_UID);

                    Os.setregid(ROOT_GID, ROOT_GID);

                }

            }

        }

    }

    /**

     * Load in commonly used resources, so they can be shared across