1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
|
/*
* 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 = 1022;
/**
* 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);
}
|