| /* |
| * Copyright (C) 2006 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. |
| */ |
| |
| package android.os; |
| |
| import android.net.LocalSocketAddress; |
| import android.net.LocalSocket; |
| import android.util.Log; |
| import dalvik.system.Zygote; |
| |
| import java.io.BufferedWriter; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.util.ArrayList; |
| |
| /*package*/ class ZygoteStartFailedEx extends Exception { |
| /** |
| * Something prevented the zygote process startup from happening normally |
| */ |
| |
| ZygoteStartFailedEx() {}; |
| ZygoteStartFailedEx(String s) {super(s);} |
| ZygoteStartFailedEx(Throwable cause) {super(cause);} |
| } |
| |
| /** |
| * Tools for managing OS processes. |
| */ |
| public class Process { |
| private static final String LOG_TAG = "Process"; |
| |
| private static final String ZYGOTE_SOCKET = "zygote"; |
| |
| /** |
| * Name of a process for running the platform's media services. |
| * {@hide} |
| */ |
| public static final String ANDROID_SHARED_MEDIA = "com.android.process.media"; |
| |
| /** |
| * Name of the process that Google content providers can share. |
| * {@hide} |
| */ |
| public static final String GOOGLE_SHARED_APP_CONTENT = "com.google.process.content"; |
| |
| /** |
| * Defines the UID/GID under which system code runs. |
| */ |
| public static final int SYSTEM_UID = 1000; |
| |
| /** |
| * Defines the UID/GID under which the telephony code runs. |
| */ |
| public static final int PHONE_UID = 1001; |
| |
| /** |
| * Defines the UID/GID for the user shell. |
| * @hide |
| */ |
| public static final int SHELL_UID = 2000; |
| |
| /** |
| * Defines the UID/GID for the log group. |
| * @hide |
| */ |
| public static final int LOG_UID = 1007; |
| |
| /** |
| * Defines the UID/GID for the WIFI supplicant process. |
| * @hide |
| */ |
| public static final int WIFI_UID = 1010; |
| |
| /** |
| * Defines the GID for the group that allows write access to the SD card. |
| * @hide |
| */ |
| public static final int SDCARD_RW_GID = 1015; |
| |
| /** |
| * Defines the UID/GID for the NFC service process. |
| * @hide |
| */ |
| public static final int NFC_UID = 1025; |
| |
| /** |
| * Defines the GID for the group that allows write access to the internal media storage. |
| * @hide |
| */ |
| public static final int MEDIA_RW_GID = 1023; |
| |
| /** |
| * Defines the start of a range of UIDs (and GIDs), going from this |
| * number to {@link #LAST_APPLICATION_UID} that are reserved for assigning |
| * to applications. |
| */ |
| public static final int FIRST_APPLICATION_UID = 10000; |
| /** |
| * Last of application-specific UIDs starting at |
| * {@link #FIRST_APPLICATION_UID}. |
| */ |
| public static final int LAST_APPLICATION_UID = 99999; |
| |
| /** |
| * Defines a secondary group id for access to the bluetooth hardware. |
| */ |
| public static final int BLUETOOTH_GID = 2000; |
| |
| /** |
| * Standard priority of application threads. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_DEFAULT = 0; |
| |
| /* |
| * *************************************** |
| * ** Keep in sync with utils/threads.h ** |
| * *************************************** |
| */ |
| |
| /** |
| * Lowest available thread priority. Only for those who really, really |
| * don't want to run if anything else is happening. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_LOWEST = 19; |
| |
| /** |
| * Standard priority background threads. This gives your thread a slightly |
| * lower than normal priority, so that it will have less chance of impacting |
| * the responsiveness of the user interface. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_BACKGROUND = 10; |
| |
| /** |
| * Standard priority of threads that are currently running a user interface |
| * that the user is interacting with. Applications can not normally |
| * change to this priority; the system will automatically adjust your |
| * application threads as the user moves through the UI. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_FOREGROUND = -2; |
| |
| /** |
| * Standard priority of system display threads, involved in updating |
| * the user interface. Applications can not |
| * normally change to this priority. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_DISPLAY = -4; |
| |
| /** |
| * Standard priority of the most important display threads, for compositing |
| * the screen and retrieving input events. Applications can not normally |
| * change to this priority. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_URGENT_DISPLAY = -8; |
| |
| /** |
| * Standard priority of audio threads. Applications can not normally |
| * change to this priority. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_AUDIO = -16; |
| |
| /** |
| * Standard priority of the most important audio threads. |
| * Applications can not normally change to this priority. |
| * Use with {@link #setThreadPriority(int)} and |
| * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal |
| * {@link java.lang.Thread} class. |
| */ |
| public static final int THREAD_PRIORITY_URGENT_AUDIO = -19; |
| |
| /** |
| * Minimum increment to make a priority more favorable. |
| */ |
| public static final int THREAD_PRIORITY_MORE_FAVORABLE = -1; |
| |
| /** |
| * Minimum increment to make a priority less favorable. |
| */ |
| public static final int THREAD_PRIORITY_LESS_FAVORABLE = +1; |
| |
| /** |
| * Default thread group - gets a 'normal' share of the CPU |
| * @hide |
| */ |
| public static final int THREAD_GROUP_DEFAULT = 0; |
| |
| /** |
| * Background non-interactive thread group - All threads in |
| * this group are scheduled with a reduced share of the CPU. |
| * @hide |
| */ |
| public static final int THREAD_GROUP_BG_NONINTERACTIVE = 1; |
| |
| /** |
| * Foreground 'boost' thread group - All threads in |
| * this group are scheduled with an increased share of the CPU |
| * @hide |
| **/ |
| public static final int THREAD_GROUP_FG_BOOST = 2; |
| |
| public static final int SIGNAL_QUIT = 3; |
| public static final int SIGNAL_KILL = 9; |
| public static final int SIGNAL_USR1 = 10; |
| |
| // State for communicating with zygote process |
| |
| static LocalSocket sZygoteSocket; |
| static DataInputStream sZygoteInputStream; |
| static BufferedWriter sZygoteWriter; |
| |
| /** true if previous zygote open failed */ |
| static boolean sPreviousZygoteOpenFailed; |
| |
| /** |
| * Start a new process. |
| * |
| * <p>If processes are enabled, a new process is created and the |
| * static main() function of a <var>processClass</var> is executed there. |
| * The process will continue running after this function returns. |
| * |
| * <p>If processes are not enabled, a new thread in the caller's |
| * process is created and main() of <var>processClass</var> called there. |
| * |
| * <p>The niceName parameter, if not an empty string, is a custom name to |
| * give to the process instead of using processClass. This allows you to |
| * make easily identifyable processes even if you are using the same base |
| * <var>processClass</var> to start them. |
| * |
| * @param processClass The class to use as the process's main entry |
| * point. |
| * @param niceName A more readable name to use for the process. |
| * @param uid The user-id under which the process will run. |
| * @param gid The group-id under which the process will run. |
| * @param gids Additional group-ids associated with the process. |
| * @param enableDebugger True if debugging should be enabled for this process. |
| * @param zygoteArgs Additional arguments to supply to the zygote process. |
| * |
| * @return int If > 0 the pid of the new process; if 0 the process is |
| * being emulated by a thread |
| * @throws RuntimeException on fatal start failure |
| * |
| * {@hide} |
| */ |
| public static final int start(final String processClass, |
| final String niceName, |
| int uid, int gid, int[] gids, |
| int debugFlags, |
| String[] zygoteArgs) |
| { |
| if (supportsProcesses()) { |
| try { |
| return startViaZygote(processClass, niceName, uid, gid, gids, |
| debugFlags, zygoteArgs); |
| } catch (ZygoteStartFailedEx ex) { |
| Log.e(LOG_TAG, |
| "Starting VM process through Zygote failed"); |
| throw new RuntimeException( |
| "Starting VM process through Zygote failed", ex); |
| } |
| } else { |
| // Running in single-process mode |
| |
| Runnable runnable = new Runnable() { |
| public void run() { |
| Process.invokeStaticMain(processClass); |
| } |
| }; |
| |
| // Thread constructors must not be called with null names (see spec). |
| if (niceName != null) { |
| new Thread(runnable, niceName).start(); |
| } else { |
| new Thread(runnable).start(); |
| } |
| |
| return 0; |
| } |
| } |
| |
| /** |
| * Start a new process. Don't supply a custom nice name. |
| * {@hide} |
| */ |
| public static final int start(String processClass, int uid, int gid, |
| int[] gids, int debugFlags, String[] zygoteArgs) { |
| return start(processClass, "", uid, gid, gids, |
| debugFlags, zygoteArgs); |
| } |
| |
| private static void invokeStaticMain(String className) { |
| Class cl; |
| Object args[] = new Object[1]; |
| |
| args[0] = new String[0]; //this is argv |
| |
| try { |
| cl = Class.forName(className); |
| cl.getMethod("main", new Class[] { String[].class }) |
| .invoke(null, args); |
| } catch (Exception ex) { |
| // can be: ClassNotFoundException, |
| // NoSuchMethodException, SecurityException, |
| // IllegalAccessException, IllegalArgumentException |
| // InvocationTargetException |
| // or uncaught exception from main() |
| |
| Log.e(LOG_TAG, "Exception invoking static main on " |
| + className, ex); |
| |
| throw new RuntimeException(ex); |
| } |
| |
| } |
| |
| /** retry interval for opening a zygote socket */ |
| static final int ZYGOTE_RETRY_MILLIS = 500; |
| |
| /** |
| * Tries to open socket to Zygote process if not already open. If |
| * already open, does nothing. May block and retry. |
| */ |
| private static void openZygoteSocketIfNeeded() |
| throws ZygoteStartFailedEx { |
| |
| int retryCount; |
| |
| if (sPreviousZygoteOpenFailed) { |
| /* |
| * If we've failed before, expect that we'll fail again and |
| * don't pause for retries. |
| */ |
| retryCount = 0; |
| } else { |
| retryCount = 10; |
| } |
| |
| /* |
| * See bug #811181: Sometimes runtime can make it up before zygote. |
| * Really, we'd like to do something better to avoid this condition, |
| * but for now just wait a bit... |
| */ |
| for (int retry = 0 |
| ; (sZygoteSocket == null) && (retry < (retryCount + 1)) |
| ; retry++ ) { |
| |
| if (retry > 0) { |
| try { |
| Log.i("Zygote", "Zygote not up yet, sleeping..."); |
| Thread.sleep(ZYGOTE_RETRY_MILLIS); |
| } catch (InterruptedException ex) { |
| // should never happen |
| } |
| } |
| |
| try { |
| sZygoteSocket = new LocalSocket(); |
| |
| sZygoteSocket.connect(new LocalSocketAddress(ZYGOTE_SOCKET, |
| LocalSocketAddress.Namespace.RESERVED)); |
| |
| sZygoteInputStream |
| = new DataInputStream(sZygoteSocket.getInputStream()); |
| |
| sZygoteWriter = |
| new BufferedWriter( |
| new OutputStreamWriter( |
| sZygoteSocket.getOutputStream()), |
| 256); |
| |
| Log.i("Zygote", "Process: zygote socket opened"); |
| |
| sPreviousZygoteOpenFailed = false; |
| break; |
| } catch (IOException ex) { |
| if (sZygoteSocket != null) { |
| try { |
| sZygoteSocket.close(); |
| } catch (IOException ex2) { |
| Log.e(LOG_TAG,"I/O exception on close after exception", |
| ex2); |
| } |
| } |
| |
| sZygoteSocket = null; |
| } |
| } |
| |
| if (sZygoteSocket == null) { |
| sPreviousZygoteOpenFailed = true; |
| throw new ZygoteStartFailedEx("connect failed"); |
| } |
| } |
| |
| /** |
| * Sends an argument list to the zygote process, which starts a new child |
| * and returns the child's pid. Please note: the present implementation |
| * replaces newlines in the argument list with spaces. |
| * @param args argument list |
| * @return PID of new child process |
| * @throws ZygoteStartFailedEx if process start failed for any reason |
| */ |
| private static int zygoteSendArgsAndGetPid(ArrayList<String> args) |
| throws ZygoteStartFailedEx { |
| |
| int pid; |
| |
| openZygoteSocketIfNeeded(); |
| |
| try { |
| /** |
| * See com.android.internal.os.ZygoteInit.readArgumentList() |
| * Presently the wire format to the zygote process is: |
| * a) a count of arguments (argc, in essence) |
| * b) a number of newline-separated argument strings equal to count |
| * |
| * After the zygote process reads these it will write the pid of |
| * the child or -1 on failure. |
| */ |
| |
| sZygoteWriter.write(Integer.toString(args.size())); |
| sZygoteWriter.newLine(); |
| |
| int sz = args.size(); |
| for (int i = 0; i < sz; i++) { |
| String arg = args.get(i); |
| if (arg.indexOf('\n') >= 0) { |
| throw new ZygoteStartFailedEx( |
| "embedded newlines not allowed"); |
| } |
| sZygoteWriter.write(arg); |
| sZygoteWriter.newLine(); |
| } |
| |
| sZygoteWriter.flush(); |
| |
| // Should there be a timeout on this? |
| pid = sZygoteInputStream.readInt(); |
| |
| if (pid < 0) { |
| throw new ZygoteStartFailedEx("fork() failed"); |
| } |
| } catch (IOException ex) { |
| try { |
| if (sZygoteSocket != null) { |
| sZygoteSocket.close(); |
| } |
| } catch (IOException ex2) { |
| // we're going to fail anyway |
| Log.e(LOG_TAG,"I/O exception on routine close", ex2); |
| } |
| |
| sZygoteSocket = null; |
| |
| throw new ZygoteStartFailedEx(ex); |
| } |
| |
| return pid; |
| } |
| |
| /** |
| * Starts a new process via the zygote mechanism. |
| * |
| * @param processClass Class name whose static main() to run |
| * @param niceName 'nice' process name to appear in ps |
| * @param uid a POSIX uid that the new process should setuid() to |
| * @param gid a POSIX gid that the new process shuold setgid() to |
| * @param gids null-ok; a list of supplementary group IDs that the |
| * new process should setgroup() to. |
| * @param enableDebugger True if debugging should be enabled for this process. |
| * @param extraArgs Additional arguments to supply to the zygote process. |
| * @return PID |
| * @throws ZygoteStartFailedEx if process start failed for any reason |
| */ |
| private static int startViaZygote(final String processClass, |
| final String niceName, |
| final int uid, final int gid, |
| final int[] gids, |
| int debugFlags, |
| String[] extraArgs) |
| throws ZygoteStartFailedEx { |
| int pid; |
| |
| synchronized(Process.class) { |
| ArrayList<String> argsForZygote = new ArrayList<String>(); |
| |
| // --runtime-init, --setuid=, --setgid=, |
| // and --setgroups= must go first |
| argsForZygote.add("--runtime-init"); |
| argsForZygote.add("--setuid=" + uid); |
| argsForZygote.add("--setgid=" + gid); |
| if ((debugFlags & Zygote.DEBUG_ENABLE_SAFEMODE) != 0) { |
| argsForZygote.add("--enable-safemode"); |
| } |
| if ((debugFlags & Zygote.DEBUG_ENABLE_DEBUGGER) != 0) { |
| argsForZygote.add("--enable-debugger"); |
| } |
| if ((debugFlags & Zygote.DEBUG_ENABLE_CHECKJNI) != 0) { |
| argsForZygote.add("--enable-checkjni"); |
| } |
| if ((debugFlags & Zygote.DEBUG_ENABLE_ASSERT) != 0) { |
| argsForZygote.add("--enable-assert"); |
| } |
| |
| //TODO optionally enable debuger |
| //argsForZygote.add("--enable-debugger"); |
| |
| // --setgroups is a comma-separated list |
| if (gids != null && gids.length > 0) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("--setgroups="); |
| |
| int sz = gids.length; |
| for (int i = 0; i < sz; i++) { |
| if (i != 0) { |
| sb.append(','); |
| } |
| sb.append(gids[i]); |
| } |
| |
| argsForZygote.add(sb.toString()); |
| } |
| |
| if (niceName != null) { |
| argsForZygote.add("--nice-name=" + niceName); |
| } |
| |
| argsForZygote.add(processClass); |
| |
| if (extraArgs != null) { |
| for (String arg : extraArgs) { |
| argsForZygote.add(arg); |
| } |
| } |
| |
| pid = zygoteSendArgsAndGetPid(argsForZygote); |
| } |
| |
| if (pid <= 0) { |
| throw new ZygoteStartFailedEx("zygote start failed:" + pid); |
| } |
| |
| return pid; |
| } |
| |
| /** |
| * Returns elapsed milliseconds of the time this process has run. |
| * @return Returns the number of milliseconds this process has return. |
| */ |
| public static final native long getElapsedCpuTime(); |
| |
| /** |
| * Returns the identifier of this process, which can be used with |
| * {@link #killProcess} and {@link #sendSignal}. |
| */ |
| public static final native int myPid(); |
| |
| /** |
| * Returns the identifier of the calling thread, which be used with |
| * {@link #setThreadPriority(int, int)}. |
| */ |
| public static final native int myTid(); |
| |
| /** |
| * Returns the identifier of this process's user. |
| */ |
| public static final native int myUid(); |
| |
| /** |
| * Returns the UID assigned to a particular user name, or -1 if there is |
| * none. If the given string consists of only numbers, it is converted |
| * directly to a uid. |
| */ |
| public static final native int getUidForName(String name); |
| |
| /** |
| * Returns the GID assigned to a particular user name, or -1 if there is |
| * none. If the given string consists of only numbers, it is converted |
| * directly to a gid. |
| */ |
| public static final native int getGidForName(String name); |
| |
| /** |
| * Returns a uid for a currently running process. |
| * @param pid the process id |
| * @return the uid of the process, or -1 if the process is not running. |
| * @hide pending API council review |
| */ |
| public static final int getUidForPid(int pid) { |
| String[] procStatusLabels = { "Uid:" }; |
| long[] procStatusValues = new long[1]; |
| procStatusValues[0] = -1; |
| Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues); |
| return (int) procStatusValues[0]; |
| } |
| |
| /** |
| * Set the priority of a thread, based on Linux priorities. |
| * |
| * @param tid The identifier of the thread/process to change. |
| * @param priority A Linux priority level, from -20 for highest scheduling |
| * priority to 19 for lowest scheduling priority. |
| * |
| * @throws IllegalArgumentException Throws IllegalArgumentException if |
| * <var>tid</var> does not exist. |
| * @throws SecurityException Throws SecurityException if your process does |
| * not have permission to modify the given thread, or to use the given |
| * priority. |
| */ |
| public static final native void setThreadPriority(int tid, int priority) |
| throws IllegalArgumentException, SecurityException; |
| |
| /** |
| * Call with 'false' to cause future calls to {@link #setThreadPriority(int)} to |
| * throw an exception if passed a background-level thread priority. This is only |
| * effective if the JNI layer is built with GUARD_THREAD_PRIORITY defined to 1. |
| * |
| * @hide |
| */ |
| public static final native void setCanSelfBackground(boolean backgroundOk); |
| |
| /** |
| * Sets the scheduling group for a thread. |
| * @hide |
| * @param tid The indentifier of the thread/process to change. |
| * @param group The target group for this thread/process. |
| * |
| * @throws IllegalArgumentException Throws IllegalArgumentException if |
| * <var>tid</var> does not exist. |
| * @throws SecurityException Throws SecurityException if your process does |
| * not have permission to modify the given thread, or to use the given |
| * priority. |
| */ |
| public static final native void setThreadGroup(int tid, int group) |
| throws IllegalArgumentException, SecurityException; |
| /** |
| * Sets the scheduling group for a process and all child threads |
| * @hide |
| * @param pid The indentifier of the process to change. |
| * @param group The target group for this process. |
| * |
| * @throws IllegalArgumentException Throws IllegalArgumentException if |
| * <var>tid</var> does not exist. |
| * @throws SecurityException Throws SecurityException if your process does |
| * not have permission to modify the given thread, or to use the given |
| * priority. |
| */ |
| public static final native void setProcessGroup(int pid, int group) |
| throws IllegalArgumentException, SecurityException; |
| |
| /** |
| * Set the priority of the calling thread, based on Linux priorities. See |
| * {@link #setThreadPriority(int, int)} for more information. |
| * |
| * @param priority A Linux priority level, from -20 for highest scheduling |
| * priority to 19 for lowest scheduling priority. |
| * |
| * @throws IllegalArgumentException Throws IllegalArgumentException if |
| * <var>tid</var> does not exist. |
| * @throws SecurityException Throws SecurityException if your process does |
| * not have permission to modify the given thread, or to use the given |
| * priority. |
| * |
| * @see #setThreadPriority(int, int) |
| */ |
| public static final native void setThreadPriority(int priority) |
| throws IllegalArgumentException, SecurityException; |
| |
| /** |
| * Return the current priority of a thread, based on Linux priorities. |
| * |
| * @param tid The identifier of the thread/process to change. |
| * |
| * @return Returns the current priority, as a Linux priority level, |
| * from -20 for highest scheduling priority to 19 for lowest scheduling |
| * priority. |
| * |
| * @throws IllegalArgumentException Throws IllegalArgumentException if |
| * <var>tid</var> does not exist. |
| */ |
| public static final native int getThreadPriority(int tid) |
| throws IllegalArgumentException; |
| |
| /** |
| * Determine whether the current environment supports multiple processes. |
| * |
| * @return Returns true if the system can run in multiple processes, else |
| * false if everything is running in a single process. |
| */ |
| public static final native boolean supportsProcesses(); |
| |
| /** |
| * Set the out-of-memory badness adjustment for a process. |
| * |
| * @param pid The process identifier to set. |
| * @param amt Adjustment value -- linux allows -16 to +15. |
| * |
| * @return Returns true if the underlying system supports this |
| * feature, else false. |
| * |
| * {@hide} |
| */ |
| public static final native boolean setOomAdj(int pid, int amt); |
| |
| /** |
| * Change this process's argv[0] parameter. This can be useful to show |
| * more descriptive information in things like the 'ps' command. |
| * |
| * @param text The new name of this process. |
| * |
| * {@hide} |
| */ |
| public static final native void setArgV0(String text); |
| |
| /** |
| * Kill the process with the given PID. |
| * Note that, though this API allows us to request to |
| * kill any process based on its PID, the kernel will |
| * still impose standard restrictions on which PIDs you |
| * are actually able to kill. Typically this means only |
| * the process running the caller's packages/application |
| * and any additional processes created by that app; packages |
| * sharing a common UID will also be able to kill each |
| * other's processes. |
| */ |
| public static final void killProcess(int pid) { |
| sendSignal(pid, SIGNAL_KILL); |
| } |
| |
| /** @hide */ |
| public static final native int setUid(int uid); |
| |
| /** @hide */ |
| public static final native int setGid(int uid); |
| |
| /** |
| * Send a signal to the given process. |
| * |
| * @param pid The pid of the target process. |
| * @param signal The signal to send. |
| */ |
| public static final native void sendSignal(int pid, int signal); |
| |
| /** |
| * @hide |
| * Private impl for avoiding a log message... DO NOT USE without doing |
| * your own log, or the Android Illuminati will find you some night and |
| * beat you up. |
| */ |
| public static final void killProcessQuiet(int pid) { |
| sendSignalQuiet(pid, SIGNAL_KILL); |
| } |
| |
| /** |
| * @hide |
| * Private impl for avoiding a log message... DO NOT USE without doing |
| * your own log, or the Android Illuminati will find you some night and |
| * beat you up. |
| */ |
| public static final native void sendSignalQuiet(int pid, int signal); |
| |
| /** @hide */ |
| public static final native long getFreeMemory(); |
| |
| /** @hide */ |
| public static final native void readProcLines(String path, |
| String[] reqFields, long[] outSizes); |
| |
| /** @hide */ |
| public static final native int[] getPids(String path, int[] lastArray); |
| |
| /** @hide */ |
| public static final int PROC_TERM_MASK = 0xff; |
| /** @hide */ |
| public static final int PROC_ZERO_TERM = 0; |
| /** @hide */ |
| public static final int PROC_SPACE_TERM = (int)' '; |
| /** @hide */ |
| public static final int PROC_TAB_TERM = (int)'\t'; |
| /** @hide */ |
| public static final int PROC_COMBINE = 0x100; |
| /** @hide */ |
| public static final int PROC_PARENS = 0x200; |
| /** @hide */ |
| public static final int PROC_OUT_STRING = 0x1000; |
| /** @hide */ |
| public static final int PROC_OUT_LONG = 0x2000; |
| /** @hide */ |
| public static final int PROC_OUT_FLOAT = 0x4000; |
| |
| /** @hide */ |
| public static final native boolean readProcFile(String file, int[] format, |
| String[] outStrings, long[] outLongs, float[] outFloats); |
| |
| /** @hide */ |
| public static final native boolean parseProcLine(byte[] buffer, int startIndex, |
| int endIndex, int[] format, String[] outStrings, long[] outLongs, float[] outFloats); |
| |
| /** |
| * Gets the total Pss value for a given process, in bytes. |
| * |
| * @param pid the process to the Pss for |
| * @return the total Pss value for the given process in bytes, |
| * or -1 if the value cannot be determined |
| * @hide |
| */ |
| public static final native long getPss(int pid); |
| } |