/*
* 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.annotation.TestApi;
import android.system.Os;
import android.system.OsConstants;
import android.util.Log;
import android.webkit.WebViewZygote;
import dalvik.system.VMRuntime;
/**
* Tools for managing OS processes.
*/
public class Process {
private static final String LOG_TAG = "Process";
/**
* @hide for internal use only.
*/
public static final String ZYGOTE_SOCKET = "zygote";
/**
* @hide for internal use only.
*/
public static final String SECONDARY_ZYGOTE_SOCKET = "zygote_secondary";
/**
* Defines the root UID.
* @hide
*/
public static final int ROOT_UID = 0;
/**
* 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 UID/GID for the mediaserver process.
* @hide
*/
public static final int MEDIA_UID = 1013;
/**
* Defines the UID/GID for the DRM process.
* @hide
*/
public static final int DRM_UID = 1019;
/**
* Defines the UID/GID for the group that controls VPN services.
* @hide
*/
public static final int VPN_UID = 1016;
/**
* Defines the UID/GID for the NFC service process.
* @hide
*/
public static final int NFC_UID = 1027;
/**
* Defines the UID/GID for the Bluetooth service process.
* @hide
*/
public static final int BLUETOOTH_UID = 1002;
/**
* Defines the GID for the group that allows write access to the internal media storage.
* @hide
*/
public static final int MEDIA_RW_GID = 1023;
/**
* Access to installed package details
* @hide
*/
public static final int PACKAGE_INFO_GID = 1032;
/**
* Defines the UID/GID for the shared RELRO file updater process.
* @hide
*/
public static final int SHARED_RELRO_UID = 1037;
/**
* Defines the UID/GID for the audioserver process.
* @hide
*/
public static final int AUDIOSERVER_UID = 1041;
/**
* Defines the UID/GID for the cameraserver process
* @hide
*/
public static final int CAMERASERVER_UID = 1047;
/**
* Defines the UID/GID for the WebView zygote process.
* @hide
*/
public static final int WEBVIEW_ZYGOTE_UID = 1051;
/**
* 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 = 19999;
/**
* First uid used for fully isolated sandboxed processes (with no permissions of their own)
* @hide
*/
public static final int FIRST_ISOLATED_UID = 99000;
/**
* Last uid used for fully isolated sandboxed processes (with no permissions of their own)
* @hide
*/
public static final int LAST_ISOLATED_UID = 99999;
/**
* Defines the gid shared by all applications running under the same profile.
* @hide
*/
public static final int SHARED_USER_GID = 9997;
/**
* First gid for applications to share resources. Used when forward-locking
* is enabled but all UserHandles need to be able to read the resources.
* @hide
*/
public static final int FIRST_SHARED_APPLICATION_GID = 50000;
/**
* Last gid for applications to share resources. Used when forward-locking
* is enabled but all UserHandles need to be able to read the resources.
* @hide
*/
public static final int LAST_SHARED_APPLICATION_GID = 59999;
/** {@hide} */
public static final int FIRST_APPLICATION_CACHE_GID = 20000;
/** {@hide} */
public static final int LAST_APPLICATION_CACHE_GID = 29999;
/**
* 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 scheduling policy
* @hide
*/
public static final int SCHED_OTHER = 0;
/**
* First-In First-Out scheduling policy
* @hide
*/
public static final int SCHED_FIFO = 1;
/**
* Round-Robin scheduling policy
* @hide
*/
public static final int SCHED_RR = 2;
/**
* Batch scheduling policy
* @hide
*/
public static final int SCHED_BATCH = 3;
/**
* Idle scheduling policy
* @hide
*/
public static final int SCHED_IDLE = 5;
/**
* Reset scheduler choice on fork.
* @hide
*/
public static final int SCHED_RESET_ON_FORK = 0x40000000;
// Keep in sync with SP_* constants of enum type SchedPolicy
// declared in system/core/include/cutils/sched_policy.h,
// except THREAD_GROUP_DEFAULT does not correspond to any SP_* value.
/**
* Default thread group -
* has meaning with setProcessGroup() only, cannot be used with setThreadGroup().
* When used with setProcessGroup(), the group of each thread in the process
* is conditionally changed based on that thread's current priority, as follows:
* threads with priority numerically less than THREAD_PRIORITY_BACKGROUND
* are moved to foreground thread group. All other threads are left unchanged.
* @hide
*/
public static final int THREAD_GROUP_DEFAULT = -1;
/**
* Background thread group - All threads in
* this group are scheduled with a reduced share of the CPU.
* Value is same as constant SP_BACKGROUND of enum SchedPolicy.
* FIXME rename to THREAD_GROUP_BACKGROUND.
* @hide
*/
public static final int THREAD_GROUP_BG_NONINTERACTIVE = 0;
/**
* Foreground thread group - All threads in
* this group are scheduled with a normal share of the CPU.
* Value is same as constant SP_FOREGROUND of enum SchedPolicy.
* Not used at this level.
* @hide
**/
private static final int THREAD_GROUP_FOREGROUND = 1;
/**
* System thread group.
* @hide
**/
public static final int THREAD_GROUP_SYSTEM = 2;
/**
* Application audio thread group.
* @hide
**/
public static final int THREAD_GROUP_AUDIO_APP = 3;
/**
* System audio thread group.
* @hide
**/
public static final int THREAD_GROUP_AUDIO_SYS = 4;
/**
* Thread group for top foreground app.
* @hide
**/
public static final int THREAD_GROUP_TOP_APP = 5;
public static final int SIGNAL_QUIT = 3;
public static final int SIGNAL_KILL = 9;
public static final int SIGNAL_USR1 = 10;
private static long sStartElapsedRealtime;
private static long sStartUptimeMillis;
/**
* State associated with the zygote process.
* @hide
*/
public static final ZygoteProcess zygoteProcess =
new ZygoteProcess(ZYGOTE_SOCKET, SECONDARY_ZYGOTE_SOCKET);
/**
* 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.
*
* When invokeWith is not null, the process will be started as a fresh app
* and not a zygote fork. Note that this is only allowed for uid 0 or when
* debugFlags contains DEBUG_ENABLE_DEBUGGER.
*
* @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 debugFlags Additional flags.
* @param targetSdkVersion The target SDK version for the app.
* @param seInfo null-ok SELinux information for the new process.
* @param abi non-null the ABI this app should be started with.
* @param instructionSet null-ok the instruction set to use.
* @param appDataDir null-ok the data directory of the app.
* @param invokeWith null-ok the command to invoke with.
* @param zygoteArgs Additional arguments to supply to the zygote process.
*
* @return An object that describes the result of the attempt to start the process.
* @throws RuntimeException on fatal start failure
*
* {@hide}
*/
public static final ProcessStartResult start(final String processClass,
final String niceName,
int uid, int gid, int[] gids,
int debugFlags, int mountExternal,
int targetSdkVersion,
String seInfo,
String abi,
String instructionSet,
String appDataDir,
String invokeWith,
String[] zygoteArgs) {
return zygoteProcess.start(processClass, niceName, uid, gid, gids,
debugFlags, mountExternal, targetSdkVersion, seInfo,
abi, instructionSet, appDataDir, invokeWith, zygoteArgs);
}
/** @hide */
public static final ProcessStartResult startWebView(final String processClass,
final String niceName,
int uid, int gid, int[] gids,
int debugFlags, int mountExternal,
int targetSdkVersion,
String seInfo,
String abi,
String instructionSet,
String appDataDir,
String invokeWith,
String[] zygoteArgs) {
return WebViewZygote.getProcess().start(processClass, niceName, uid, gid, gids,
debugFlags, mountExternal, targetSdkVersion, seInfo,
abi, instructionSet, appDataDir, invokeWith, zygoteArgs);
}
/**
* 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();
/**
* Return the {@link SystemClock#elapsedRealtime()} at which this process was started.
*/
public static final long getStartElapsedRealtime() {
return sStartElapsedRealtime;
}
/**
* Return the {@link SystemClock#uptimeMillis()} at which this process was started.
*/
public static final long getStartUptimeMillis() {
return sStartUptimeMillis;
}
/** @hide */
public static final void setStartTimes(long elapsedRealtime, long uptimeMillis) {
sStartElapsedRealtime = elapsedRealtime;
sStartUptimeMillis = uptimeMillis;
}
/**
* Returns true if the current process is a 64-bit runtime.
*/
public static final boolean is64Bit() {
return VMRuntime.getRuntime().is64Bit();
}
/**
* Returns the identifier of this process, which can be used with
* {@link #killProcess} and {@link #sendSignal}.
*/
public static final int myPid() {
return Os.getpid();
}
/**
* Returns the identifier of this process' parent.
* @hide
*/
public static final int myPpid() {
return Os.getppid();
}
/**
* Returns the identifier of the calling thread, which be used with
* {@link #setThreadPriority(int, int)}.
*/
public static final int myTid() {
return Os.gettid();
}
/**
* Returns the identifier of this process's uid. This is the kernel uid
* that the process is running under, which is the identity of its
* app-specific sandbox. It is different from {@link #myUserHandle} in that
* a uid identifies a specific app sandbox in a specific user.
*/
public static final int myUid() {
return Os.getuid();
}
/**
* Returns this process's user handle. This is the
* user the process is running under. It is distinct from
* {@link #myUid()} in that a particular user will have multiple
* distinct apps running under it each with their own uid.
*/
public static UserHandle myUserHandle() {
return UserHandle.of(UserHandle.getUserId(myUid()));
}
/**
* Returns whether the given uid belongs to an application.
* @param uid A kernel uid.
* @return Whether the uid corresponds to an application sandbox running in
* a specific user.
*/
public static boolean isApplicationUid(int uid) {
return UserHandle.isApp(uid);
}
/**
* Returns whether the current process is in an isolated sandbox.
* @hide
*/
public static final boolean isIsolated() {
return isIsolated(myUid());
}
/** {@hide} */
public static final boolean isIsolated(int uid) {
uid = UserHandle.getAppId(uid);
return uid >= FIRST_ISOLATED_UID && uid <= LAST_ISOLATED_UID;
}
/**
* 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];
}
/**
* Returns the parent process id for a currently running process.
* @param pid the process id
* @return the parent process id of the process, or -1 if the process is not running.
* @hide
*/
public static final int getParentPid(int pid) {
String[] procStatusLabels = { "PPid:" };
long[] procStatusValues = new long[1];
procStatusValues[0] = -1;
Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues);
return (int) procStatusValues[0];
}
/**
* Returns the thread group leader id for a currently running thread.
* @param tid the thread id
* @return the thread group leader id of the thread, or -1 if the thread is not running.
* This is same as what getpid(2) would return if called by tid.
* @hide
*/
public static final int getThreadGroupLeader(int tid) {
String[] procStatusLabels = { "Tgid:" };
long[] procStatusValues = new long[1];
procStatusValues[0] = -1;
Process.readProcLines("/proc/" + tid + "/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 identifier of the thread to change.
* @param group The target group for this thread from THREAD_GROUP_*.
*
* @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.
* If the thread is a thread group leader, that is it's gettid() == getpid(),
* then the other threads in the same thread group are _not_ affected.
*
* Does not set cpuset for some historical reason, just calls
* libcutils::set_sched_policy().
*/
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 identifier of the process to change.
* @param group The target group for this process from THREAD_GROUP_*.
*
* @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.
*
* group == THREAD_GROUP_DEFAULT means to move all non-background priority
* threads to the foreground scheduling group, but to leave background
* priority threads alone. group == THREAD_GROUP_BG_NONINTERACTIVE moves all
* threads, regardless of priority, to the background scheduling group.
* group == THREAD_GROUP_FOREGROUND is not allowed.
*
* Always sets cpusets.
*/
public static final native void setProcessGroup(int pid, int group)
throws IllegalArgumentException, SecurityException;
/**
* Return the scheduling group of requested process.
*
* @hide
*/
public static final native int getProcessGroup(int pid)
throws IllegalArgumentException, SecurityException;
/**
* On some devices, the foreground process may have one or more CPU
* cores exclusively reserved for it. This method can be used to
* retrieve which cores that are (if any), so the calling process
* can then use sched_setaffinity() to lock a thread to these cores.
* Note that the calling process must currently be running in the
* foreground for this method to return any cores.
*
* The CPU core(s) exclusively reserved for the foreground process will
* stay reserved for as long as the process stays in the foreground.
*
* As soon as a process leaves the foreground, those CPU cores will
* no longer be reserved for it, and will most likely be reserved for
* the new foreground process. It's not necessary to change the affinity
* of your process when it leaves the foreground (if you had previously
* set it to use a reserved core); the OS will automatically take care
* of resetting the affinity at that point.
*
* @return an array of integers, indicating the CPU cores exclusively
* reserved for this process. The array will have length zero if no
* CPU cores are exclusively reserved for this process at this point
* in time.
*/
public static final native int[] getExclusiveCores();
/**
* 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;
/**
* Return the current scheduling policy of a thread, based on Linux.
*
* @param tid The identifier of the thread/process to get the scheduling policy.
*
* @throws IllegalArgumentException Throws IllegalArgumentException if
* <var>tid</var> does not exist, or if <var>priority</var> is out of range for the policy.
* @throws SecurityException Throws SecurityException if your process does
* not have permission to modify the given thread, or to use the given
* scheduling policy or priority.
*
* {@hide}
*/
@TestApi
public static final native int getThreadScheduler(int tid)
throws IllegalArgumentException;
/**
* Set the scheduling policy and priority of a thread, based on Linux.
*
* @param tid The identifier of the thread/process to change.
* @param policy A Linux scheduling policy such as SCHED_OTHER etc.
* @param priority A Linux priority level in a range appropriate for the given policy.
*
* @throws IllegalArgumentException Throws IllegalArgumentException if
* <var>tid</var> does not exist, or if <var>priority</var> is out of range for the policy.
* @throws SecurityException Throws SecurityException if your process does
* not have permission to modify the given thread, or to use the given
* scheduling policy or priority.
*
* {@hide}
*/
public static final native void setThreadScheduler(int tid, int policy, int priority)
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.
*
* @deprecated This method always returns true. Do not use.
*/
@Deprecated
public static final boolean supportsProcesses() {
return true;
}
/**
* Adjust the swappiness level for a process.
*
* @param pid The process identifier to set.
* @param is_increased Whether swappiness should be increased or default.
*
* @return Returns true if the underlying system supports this
* feature, else false.
*
* {@hide}
*/
public static final native boolean setSwappiness(int pid, boolean is_increased);
/**
* 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 long getTotalMemory();
/** @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_QUOTES = 0x400;
/** @hide */
public static final int PROC_CHAR = 0x800;
/** @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);
/** @hide */
public static final native int[] getPidsForCommands(String[] cmds);
/**
* 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);
/**
* Specifies the outcome of having started a process.
* @hide
*/
public static final class ProcessStartResult {
/**
* The PID of the newly started process.
* Always >= 0. (If the start failed, an exception will have been thrown instead.)
*/
public int pid;
/**
* True if the process was started with a wrapper attached.
*/
public boolean usingWrapper;
}
/**
* Kill all processes in a process group started for the given
* pid.
* @hide
*/
public static final native int killProcessGroup(int uid, int pid);
/**
* Remove all process groups. Expected to be called when ActivityManager
* is restarted.
* @hide
*/
public static final native void removeAllProcessGroups();
/**
* Check to see if a thread belongs to a given process. This may require
* more permissions than apps generally have.
* @return true if this thread belongs to a process
* @hide
*/
public static final boolean isThreadInProcess(int tid, int pid) {
StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
try {
if (Os.access("/proc/" + tid + "/task/" + pid, OsConstants.F_OK)) {
return true;
} else {
return false;
}
} catch (Exception e) {
return false;
} finally {
StrictMode.setThreadPolicy(oldPolicy);
}
}
}