1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.os; 18 19 import android.net.LocalSocketAddress; 20 import android.net.LocalSocket; 21 import android.util.Log; 22 import dalvik.system.Zygote; 23 24 import java.io.BufferedWriter; 25 import java.io.DataInputStream; 26 import java.io.IOException; 27 import java.io.OutputStreamWriter; 28 import java.util.ArrayList; 29 30 /*package*/ class ZygoteStartFailedEx extends Exception { 31 /** 32 * Something prevented the zygote process startup from happening normally 33 */ 34 35 ZygoteStartFailedEx() {}; 36 ZygoteStartFailedEx(String s) {super(s);} 37 ZygoteStartFailedEx(Throwable cause) {super(cause);} 38 } 39 40 /** 41 * Tools for managing OS processes. 42 */ 43 public class Process { 44 private static final String LOG_TAG = "Process"; 45 46 private static final String ZYGOTE_SOCKET = "zygote"; 47 48 /** 49 * Name of a process for running the platform's media services. 50 * {@hide} 51 */ 52 public static final String ANDROID_SHARED_MEDIA = "com.android.process.media"; 53 54 /** 55 * Name of the process that Google content providers can share. 56 * {@hide} 57 */ 58 public static final String GOOGLE_SHARED_APP_CONTENT = "com.google.process.content"; 59 60 /** 61 * Defines the UID/GID under which system code runs. 62 */ 63 public static final int SYSTEM_UID = 1000; 64 65 /** 66 * Defines the UID/GID under which the telephony code runs. 67 */ 68 public static final int PHONE_UID = 1001; 69 70 /** 71 * Defines the UID/GID for the user shell. 72 * @hide 73 */ 74 public static final int SHELL_UID = 2000; 75 76 /** 77 * Defines the UID/GID for the log group. 78 * @hide 79 */ 80 public static final int LOG_UID = 1007; 81 82 /** 83 * Defines the UID/GID for the WIFI supplicant process. 84 * @hide 85 */ 86 public static final int WIFI_UID = 1010; 87 88 /** 89 * Defines the UID/GID for the NFC service process. 90 * @hide 91 */ 92 public static final int NFC_UID = 1022; 93 94 /** 95 * Defines the start of a range of UIDs (and GIDs), going from this 96 * number to {@link #LAST_APPLICATION_UID} that are reserved for assigning 97 * to applications. 98 */ 99 public static final int FIRST_APPLICATION_UID = 10000; 100 /** 101 * Last of application-specific UIDs starting at 102 * {@link #FIRST_APPLICATION_UID}. 103 */ 104 public static final int LAST_APPLICATION_UID = 99999; 105 106 /** 107 * Defines a secondary group id for access to the bluetooth hardware. 108 */ 109 public static final int BLUETOOTH_GID = 2000; 110 111 /** 112 * Standard priority of application threads. 113 * Use with {@link #setThreadPriority(int)} and 114 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 115 * {@link java.lang.Thread} class. 116 */ 117 public static final int THREAD_PRIORITY_DEFAULT = 0; 118 119 /* 120 * *************************************** 121 * ** Keep in sync with utils/threads.h ** 122 * *************************************** 123 */ 124 125 /** 126 * Lowest available thread priority. Only for those who really, really 127 * don't want to run if anything else is happening. 128 * Use with {@link #setThreadPriority(int)} and 129 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 130 * {@link java.lang.Thread} class. 131 */ 132 public static final int THREAD_PRIORITY_LOWEST = 19; 133 134 /** 135 * Standard priority background threads. This gives your thread a slightly 136 * lower than normal priority, so that it will have less chance of impacting 137 * the responsiveness of the user interface. 138 * Use with {@link #setThreadPriority(int)} and 139 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 140 * {@link java.lang.Thread} class. 141 */ 142 public static final int THREAD_PRIORITY_BACKGROUND = 10; 143 144 /** 145 * Standard priority of threads that are currently running a user interface 146 * that the user is interacting with. Applications can not normally 147 * change to this priority; the system will automatically adjust your 148 * application threads as the user moves through the UI. 149 * Use with {@link #setThreadPriority(int)} and 150 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 151 * {@link java.lang.Thread} class. 152 */ 153 public static final int THREAD_PRIORITY_FOREGROUND = -2; 154 155 /** 156 * Standard priority of system display threads, involved in updating 157 * the user interface. Applications can not 158 * normally change to this priority. 159 * Use with {@link #setThreadPriority(int)} and 160 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 161 * {@link java.lang.Thread} class. 162 */ 163 public static final int THREAD_PRIORITY_DISPLAY = -4; 164 165 /** 166 * Standard priority of the most important display threads, for compositing 167 * the screen and retrieving input events. Applications can not normally 168 * change to this priority. 169 * Use with {@link #setThreadPriority(int)} and 170 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 171 * {@link java.lang.Thread} class. 172 */ 173 public static final int THREAD_PRIORITY_URGENT_DISPLAY = -8; 174 175 /** 176 * Standard priority of audio threads. Applications can not normally 177 * change to this priority. 178 * Use with {@link #setThreadPriority(int)} and 179 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 180 * {@link java.lang.Thread} class. 181 */ 182 public static final int THREAD_PRIORITY_AUDIO = -16; 183 184 /** 185 * Standard priority of the most important audio threads. 186 * Applications can not normally change to this priority. 187 * Use with {@link #setThreadPriority(int)} and 188 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 189 * {@link java.lang.Thread} class. 190 */ 191 public static final int THREAD_PRIORITY_URGENT_AUDIO = -19; 192 193 /** 194 * Minimum increment to make a priority more favorable. 195 */ 196 public static final int THREAD_PRIORITY_MORE_FAVORABLE = -1; 197 198 /** 199 * Minimum increment to make a priority less favorable. 200 */ 201 public static final int THREAD_PRIORITY_LESS_FAVORABLE = +1; 202 203 /** 204 * Default thread group - gets a 'normal' share of the CPU 205 * @hide 206 */ 207 public static final int THREAD_GROUP_DEFAULT = 0; 208 209 /** 210 * Background non-interactive thread group - All threads in 211 * this group are scheduled with a reduced share of the CPU. 212 * @hide 213 */ 214 public static final int THREAD_GROUP_BG_NONINTERACTIVE = 1; 215 216 /** 217 * Foreground 'boost' thread group - All threads in 218 * this group are scheduled with an increased share of the CPU 219 * @hide 220 **/ 221 public static final int THREAD_GROUP_FG_BOOST = 2; 222 223 public static final int SIGNAL_QUIT = 3; 224 public static final int SIGNAL_KILL = 9; 225 public static final int SIGNAL_USR1 = 10; 226 227 // State for communicating with zygote process 228 229 static LocalSocket sZygoteSocket; 230 static DataInputStream sZygoteInputStream; 231 static BufferedWriter sZygoteWriter; 232 233 /** true if previous zygote open failed */ 234 static boolean sPreviousZygoteOpenFailed; 235 236 /** 237 * Start a new process. 238 * 239 * <p>If processes are enabled, a new process is created and the 240 * static main() function of a <var>processClass</var> is executed there. 241 * The process will continue running after this function returns. 242 * 243 * <p>If processes are not enabled, a new thread in the caller's 244 * process is created and main() of <var>processClass</var> called there. 245 * 246 * <p>The niceName parameter, if not an empty string, is a custom name to 247 * give to the process instead of using processClass. This allows you to 248 * make easily identifyable processes even if you are using the same base 249 * <var>processClass</var> to start them. 250 * 251 * @param processClass The class to use as the process's main entry 252 * point. 253 * @param niceName A more readable name to use for the process. 254 * @param uid The user-id under which the process will run. 255 * @param gid The group-id under which the process will run. 256 * @param gids Additional group-ids associated with the process. 257 * @param enableDebugger True if debugging should be enabled for this process. 258 * @param zygoteArgs Additional arguments to supply to the zygote process. 259 * 260 * @return int If > 0 the pid of the new process; if 0 the process is 261 * being emulated by a thread 262 * @throws RuntimeException on fatal start failure 263 * 264 * {@hide} 265 */ 266 public static final int start(final String processClass, 267 final String niceName, 268 int uid, int gid, int[] gids, 269 int debugFlags, 270 String[] zygoteArgs) 271 { 272 if (supportsProcesses()) { 273 try { 274 return startViaZygote(processClass, niceName, uid, gid, gids, 275 debugFlags, zygoteArgs); 276 } catch (ZygoteStartFailedEx ex) { 277 Log.e(LOG_TAG, 278 "Starting VM process through Zygote failed"); 279 throw new RuntimeException( 280 "Starting VM process through Zygote failed", ex); 281 } 282 } else { 283 // Running in single-process mode 284 285 Runnable runnable = new Runnable() { 286 public void run() { 287 Process.invokeStaticMain(processClass); 288 } 289 }; 290 291 // Thread constructors must not be called with null names (see spec). 292 if (niceName != null) { 293 new Thread(runnable, niceName).start(); 294 } else { 295 new Thread(runnable).start(); 296 } 297 298 return 0; 299 } 300 } 301 302 /** 303 * Start a new process. Don't supply a custom nice name. 304 * {@hide} 305 */ 306 public static final int start(String processClass, int uid, int gid, 307 int[] gids, int debugFlags, String[] zygoteArgs) { 308 return start(processClass, "", uid, gid, gids, 309 debugFlags, zygoteArgs); 310 } 311 312 private static void invokeStaticMain(String className) { 313 Class cl; 314 Object args[] = new Object[1]; 315 316 args[0] = new String[0]; //this is argv 317 318 try { 319 cl = Class.forName(className); 320 cl.getMethod("main", new Class[] { String[].class }) 321 .invoke(null, args); 322 } catch (Exception ex) { 323 // can be: ClassNotFoundException, 324 // NoSuchMethodException, SecurityException, 325 // IllegalAccessException, IllegalArgumentException 326 // InvocationTargetException 327 // or uncaught exception from main() 328 329 Log.e(LOG_TAG, "Exception invoking static main on " 330 + className, ex); 331 332 throw new RuntimeException(ex); 333 } 334 335 } 336 337 /** retry interval for opening a zygote socket */ 338 static final int ZYGOTE_RETRY_MILLIS = 500; 339 340 /** 341 * Tries to open socket to Zygote process if not already open. If 342 * already open, does nothing. May block and retry. 343 */ 344 private static void openZygoteSocketIfNeeded() 345 throws ZygoteStartFailedEx { 346 347 int retryCount; 348 349 if (sPreviousZygoteOpenFailed) { 350 /* 351 * If we've failed before, expect that we'll fail again and 352 * don't pause for retries. 353 */ 354 retryCount = 0; 355 } else { 356 retryCount = 10; 357 } 358 359 /* 360 * See bug #811181: Sometimes runtime can make it up before zygote. 361 * Really, we'd like to do something better to avoid this condition, 362 * but for now just wait a bit... 363 */ 364 for (int retry = 0 365 ; (sZygoteSocket == null) && (retry < (retryCount + 1)) 366 ; retry++ ) { 367 368 if (retry > 0) { 369 try { 370 Log.i("Zygote", "Zygote not up yet, sleeping..."); 371 Thread.sleep(ZYGOTE_RETRY_MILLIS); 372 } catch (InterruptedException ex) { 373 // should never happen 374 } 375 } 376 377 try { 378 sZygoteSocket = new LocalSocket(); 379 380 sZygoteSocket.connect(new LocalSocketAddress(ZYGOTE_SOCKET, 381 LocalSocketAddress.Namespace.RESERVED)); 382 383 sZygoteInputStream 384 = new DataInputStream(sZygoteSocket.getInputStream()); 385 386 sZygoteWriter = 387 new BufferedWriter( 388 new OutputStreamWriter( 389 sZygoteSocket.getOutputStream()), 390 256); 391 392 Log.i("Zygote", "Process: zygote socket opened"); 393 394 sPreviousZygoteOpenFailed = false; 395 break; 396 } catch (IOException ex) { 397 if (sZygoteSocket != null) { 398 try { 399 sZygoteSocket.close(); 400 } catch (IOException ex2) { 401 Log.e(LOG_TAG,"I/O exception on close after exception", 402 ex2); 403 } 404 } 405 406 sZygoteSocket = null; 407 } 408 } 409 410 if (sZygoteSocket == null) { 411 sPreviousZygoteOpenFailed = true; 412 throw new ZygoteStartFailedEx("connect failed"); 413 } 414 } 415 416 /** 417 * Sends an argument list to the zygote process, which starts a new child 418 * and returns the child's pid. Please note: the present implementation 419 * replaces newlines in the argument list with spaces. 420 * @param args argument list 421 * @return PID of new child process 422 * @throws ZygoteStartFailedEx if process start failed for any reason 423 */ 424 private static int zygoteSendArgsAndGetPid(ArrayList<String> args) 425 throws ZygoteStartFailedEx { 426 427 int pid; 428 429 openZygoteSocketIfNeeded(); 430 431 try { 432 /** 433 * See com.android.internal.os.ZygoteInit.readArgumentList() 434 * Presently the wire format to the zygote process is: 435 * a) a count of arguments (argc, in essence) 436 * b) a number of newline-separated argument strings equal to count 437 * 438 * After the zygote process reads these it will write the pid of 439 * the child or -1 on failure. 440 */ 441 442 sZygoteWriter.write(Integer.toString(args.size())); 443 sZygoteWriter.newLine(); 444 445 int sz = args.size(); 446 for (int i = 0; i < sz; i++) { 447 String arg = args.get(i); 448 if (arg.indexOf('\n') >= 0) { 449 throw new ZygoteStartFailedEx( 450 "embedded newlines not allowed"); 451 } 452 sZygoteWriter.write(arg); 453 sZygoteWriter.newLine(); 454 } 455 456 sZygoteWriter.flush(); 457 458 // Should there be a timeout on this? 459 pid = sZygoteInputStream.readInt(); 460 461 if (pid < 0) { 462 throw new ZygoteStartFailedEx("fork() failed"); 463 } 464 } catch (IOException ex) { 465 try { 466 if (sZygoteSocket != null) { 467 sZygoteSocket.close(); 468 } 469 } catch (IOException ex2) { 470 // we're going to fail anyway 471 Log.e(LOG_TAG,"I/O exception on routine close", ex2); 472 } 473 474 sZygoteSocket = null; 475 476 throw new ZygoteStartFailedEx(ex); 477 } 478 479 return pid; 480 } 481 482 /** 483 * Starts a new process via the zygote mechanism. 484 * 485 * @param processClass Class name whose static main() to run 486 * @param niceName 'nice' process name to appear in ps 487 * @param uid a POSIX uid that the new process should setuid() to 488 * @param gid a POSIX gid that the new process shuold setgid() to 489 * @param gids null-ok; a list of supplementary group IDs that the 490 * new process should setgroup() to. 491 * @param enableDebugger True if debugging should be enabled for this process. 492 * @param extraArgs Additional arguments to supply to the zygote process. 493 * @return PID 494 * @throws ZygoteStartFailedEx if process start failed for any reason 495 */ 496 private static int startViaZygote(final String processClass, 497 final String niceName, 498 final int uid, final int gid, 499 final int[] gids, 500 int debugFlags, 501 String[] extraArgs) 502 throws ZygoteStartFailedEx { 503 int pid; 504 505 synchronized(Process.class) { 506 ArrayList<String> argsForZygote = new ArrayList<String>(); 507 508 // --runtime-init, --setuid=, --setgid=, 509 // and --setgroups= must go first 510 argsForZygote.add("--runtime-init"); 511 argsForZygote.add("--setuid=" + uid); 512 argsForZygote.add("--setgid=" + gid); 513 if ((debugFlags & Zygote.DEBUG_ENABLE_SAFEMODE) != 0) { 514 argsForZygote.add("--enable-safemode"); 515 } 516 if ((debugFlags & Zygote.DEBUG_ENABLE_DEBUGGER) != 0) { 517 argsForZygote.add("--enable-debugger"); 518 } 519 if ((debugFlags & Zygote.DEBUG_ENABLE_CHECKJNI) != 0) { 520 argsForZygote.add("--enable-checkjni"); 521 } 522 if ((debugFlags & Zygote.DEBUG_ENABLE_ASSERT) != 0) { 523 argsForZygote.add("--enable-assert"); 524 } 525 526 //TODO optionally enable debuger 527 //argsForZygote.add("--enable-debugger"); 528 529 // --setgroups is a comma-separated list 530 if (gids != null && gids.length > 0) { 531 StringBuilder sb = new StringBuilder(); 532 sb.append("--setgroups="); 533 534 int sz = gids.length; 535 for (int i = 0; i < sz; i++) { 536 if (i != 0) { 537 sb.append(','); 538 } 539 sb.append(gids[i]); 540 } 541 542 argsForZygote.add(sb.toString()); 543 } 544 545 if (niceName != null) { 546 argsForZygote.add("--nice-name=" + niceName); 547 } 548 549 argsForZygote.add(processClass); 550 551 if (extraArgs != null) { 552 for (String arg : extraArgs) { 553 argsForZygote.add(arg); 554 } 555 } 556 557 pid = zygoteSendArgsAndGetPid(argsForZygote); 558 } 559 560 if (pid <= 0) { 561 throw new ZygoteStartFailedEx("zygote start failed:" + pid); 562 } 563 564 return pid; 565 } 566 567 /** 568 * Returns elapsed milliseconds of the time this process has run. 569 * @return Returns the number of milliseconds this process has return. 570 */ 571 public static final native long getElapsedCpuTime(); 572 573 /** 574 * Returns the identifier of this process, which can be used with 575 * {@link #killProcess} and {@link #sendSignal}. 576 */ 577 public static final native int myPid(); 578 579 /** 580 * Returns the identifier of the calling thread, which be used with 581 * {@link #setThreadPriority(int, int)}. 582 */ 583 public static final native int myTid(); 584 585 /** 586 * Returns the identifier of this process's user. 587 */ 588 public static final native int myUid(); 589 590 /** 591 * Returns the UID assigned to a particular user name, or -1 if there is 592 * none. If the given string consists of only numbers, it is converted 593 * directly to a uid. 594 */ 595 public static final native int getUidForName(String name); 596 597 /** 598 * Returns the GID assigned to a particular user name, or -1 if there is 599 * none. If the given string consists of only numbers, it is converted 600 * directly to a gid. 601 */ 602 public static final native int getGidForName(String name); 603 604 /** 605 * Returns a uid for a currently running process. 606 * @param pid the process id 607 * @return the uid of the process, or -1 if the process is not running. 608 * @hide pending API council review 609 */ 610 public static final int getUidForPid(int pid) { 611 String[] procStatusLabels = { "Uid:" }; 612 long[] procStatusValues = new long[1]; 613 procStatusValues[0] = -1; 614 Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues); 615 return (int) procStatusValues[0]; 616 } 617 618 /** 619 * Set the priority of a thread, based on Linux priorities. 620 * 621 * @param tid The identifier of the thread/process to change. 622 * @param priority A Linux priority level, from -20 for highest scheduling 623 * priority to 19 for lowest scheduling priority. 624 * 625 * @throws IllegalArgumentException Throws IllegalArgumentException if 626 * <var>tid</var> does not exist. 627 * @throws SecurityException Throws SecurityException if your process does 628 * not have permission to modify the given thread, or to use the given 629 * priority. 630 */ 631 public static final native void setThreadPriority(int tid, int priority) 632 throws IllegalArgumentException, SecurityException; 633 634 /** 635 * Call with 'false' to cause future calls to {@link #setThreadPriority(int)} to 636 * throw an exception if passed a background-level thread priority. This is only 637 * effective if the JNI layer is built with GUARD_THREAD_PRIORITY defined to 1. 638 * 639 * @hide 640 */ 641 public static final native void setCanSelfBackground(boolean backgroundOk); 642 643 /** 644 * Sets the scheduling group for a thread. 645 * @hide 646 * @param tid The indentifier of the thread/process to change. 647 * @param group The target group for this thread/process. 648 * 649 * @throws IllegalArgumentException Throws IllegalArgumentException if 650 * <var>tid</var> does not exist. 651 * @throws SecurityException Throws SecurityException if your process does 652 * not have permission to modify the given thread, or to use the given 653 * priority. 654 */ 655 public static final native void setThreadGroup(int tid, int group) 656 throws IllegalArgumentException, SecurityException; 657 /** 658 * Sets the scheduling group for a process and all child threads 659 * @hide 660 * @param pid The indentifier of the process to change. 661 * @param group The target group for this process. 662 * 663 * @throws IllegalArgumentException Throws IllegalArgumentException if 664 * <var>tid</var> does not exist. 665 * @throws SecurityException Throws SecurityException if your process does 666 * not have permission to modify the given thread, or to use the given 667 * priority. 668 */ 669 public static final native void setProcessGroup(int pid, int group) 670 throws IllegalArgumentException, SecurityException; 671 672 /** 673 * Set the priority of the calling thread, based on Linux priorities. See 674 * {@link #setThreadPriority(int, int)} for more information. 675 * 676 * @param priority A Linux priority level, from -20 for highest scheduling 677 * priority to 19 for lowest scheduling priority. 678 * 679 * @throws IllegalArgumentException Throws IllegalArgumentException if 680 * <var>tid</var> does not exist. 681 * @throws SecurityException Throws SecurityException if your process does 682 * not have permission to modify the given thread, or to use the given 683 * priority. 684 * 685 * @see #setThreadPriority(int, int) 686 */ 687 public static final native void setThreadPriority(int priority) 688 throws IllegalArgumentException, SecurityException; 689 690 /** 691 * Return the current priority of a thread, based on Linux priorities. 692 * 693 * @param tid The identifier of the thread/process to change. 694 * 695 * @return Returns the current priority, as a Linux priority level, 696 * from -20 for highest scheduling priority to 19 for lowest scheduling 697 * priority. 698 * 699 * @throws IllegalArgumentException Throws IllegalArgumentException if 700 * <var>tid</var> does not exist. 701 */ 702 public static final native int getThreadPriority(int tid) 703 throws IllegalArgumentException; 704 705 /** 706 * Determine whether the current environment supports multiple processes. 707 * 708 * @return Returns true if the system can run in multiple processes, else 709 * false if everything is running in a single process. 710 */ 711 public static final native boolean supportsProcesses(); 712 713 /** 714 * Set the out-of-memory badness adjustment for a process. 715 * 716 * @param pid The process identifier to set. 717 * @param amt Adjustment value -- linux allows -16 to +15. 718 * 719 * @return Returns true if the underlying system supports this 720 * feature, else false. 721 * 722 * {@hide} 723 */ 724 public static final native boolean setOomAdj(int pid, int amt); 725 726 /** 727 * Change this process's argv[0] parameter. This can be useful to show 728 * more descriptive information in things like the 'ps' command. 729 * 730 * @param text The new name of this process. 731 * 732 * {@hide} 733 */ 734 public static final native void setArgV0(String text); 735 736 /** 737 * Kill the process with the given PID. 738 * Note that, though this API allows us to request to 739 * kill any process based on its PID, the kernel will 740 * still impose standard restrictions on which PIDs you 741 * are actually able to kill. Typically this means only 742 * the process running the caller's packages/application 743 * and any additional processes created by that app; packages 744 * sharing a common UID will also be able to kill each 745 * other's processes. 746 */ 747 public static final void killProcess(int pid) { 748 sendSignal(pid, SIGNAL_KILL); 749 } 750 751 /** @hide */ 752 public static final native int setUid(int uid); 753 754 /** @hide */ 755 public static final native int setGid(int uid); 756 757 /** 758 * Send a signal to the given process. 759 * 760 * @param pid The pid of the target process. 761 * @param signal The signal to send. 762 */ 763 public static final native void sendSignal(int pid, int signal); 764 765 /** 766 * @hide 767 * Private impl for avoiding a log message... DO NOT USE without doing 768 * your own log, or the Android Illuminati will find you some night and 769 * beat you up. 770 */ 771 public static final void killProcessQuiet(int pid) { 772 sendSignalQuiet(pid, SIGNAL_KILL); 773 } 774 775 /** 776 * @hide 777 * Private impl for avoiding a log message... DO NOT USE without doing 778 * your own log, or the Android Illuminati will find you some night and 779 * beat you up. 780 */ 781 public static final native void sendSignalQuiet(int pid, int signal); 782 783 /** @hide */ 784 public static final native long getFreeMemory(); 785 786 /** @hide */ 787 public static final native void readProcLines(String path, 788 String[] reqFields, long[] outSizes); 789 790 /** @hide */ 791 public static final native int[] getPids(String path, int[] lastArray); 792 793 /** @hide */ 794 public static final int PROC_TERM_MASK = 0xff; 795 /** @hide */ 796 public static final int PROC_ZERO_TERM = 0; 797 /** @hide */ 798 public static final int PROC_SPACE_TERM = (int)' '; 799 /** @hide */ 800 public static final int PROC_TAB_TERM = (int)'\t'; 801 /** @hide */ 802 public static final int PROC_COMBINE = 0x100; 803 /** @hide */ 804 public static final int PROC_PARENS = 0x200; 805 /** @hide */ 806 public static final int PROC_OUT_STRING = 0x1000; 807 /** @hide */ 808 public static final int PROC_OUT_LONG = 0x2000; 809 /** @hide */ 810 public static final int PROC_OUT_FLOAT = 0x4000; 811 812 /** @hide */ 813 public static final native boolean readProcFile(String file, int[] format, 814 String[] outStrings, long[] outLongs, float[] outFloats); 815 816 /** @hide */ 817 public static final native boolean parseProcLine(byte[] buffer, int startIndex, 818 int endIndex, int[] format, String[] outStrings, long[] outLongs, float[] outFloats); 819 820 /** 821 * Gets the total Pss value for a given process, in bytes. 822 * 823 * @param pid the process to the Pss for 824 * @return the total Pss value for the given process in bytes, 825 * or -1 if the value cannot be determined 826 * @hide 827 */ 828 public static final native long getPss(int pid); 829 } 830
