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 mediaserver process. 90 * @hide 91 */ 92 public static final int MEDIA_UID = 1013; 93 94 /** 95 * Defines the GID for the group that allows write access to the SD card. 96 * @hide 97 */ 98 public static final int SDCARD_RW_GID = 1015; 99 100 /** 101 * Defines the UID/GID for the NFC service process. 102 * @hide 103 */ 104 public static final int NFC_UID = 1027; 105 106 /** 107 * Defines the GID for the group that allows write access to the internal media storage. 108 * @hide 109 */ 110 public static final int MEDIA_RW_GID = 1023; 111 112 /** 113 * Defines the start of a range of UIDs (and GIDs), going from this 114 * number to {@link #LAST_APPLICATION_UID} that are reserved for assigning 115 * to applications. 116 */ 117 public static final int FIRST_APPLICATION_UID = 10000; 118 /** 119 * Last of application-specific UIDs starting at 120 * {@link #FIRST_APPLICATION_UID}. 121 */ 122 public static final int LAST_APPLICATION_UID = 99999; 123 124 /** 125 * Defines a secondary group id for access to the bluetooth hardware. 126 */ 127 public static final int BLUETOOTH_GID = 2000; 128 129 /** 130 * Standard priority of application threads. 131 * Use with {@link #setThreadPriority(int)} and 132 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 133 * {@link java.lang.Thread} class. 134 */ 135 public static final int THREAD_PRIORITY_DEFAULT = 0; 136 137 /* 138 * *************************************** 139 * ** Keep in sync with utils/threads.h ** 140 * *************************************** 141 */ 142 143 /** 144 * Lowest available thread priority. Only for those who really, really 145 * don't want to run if anything else is happening. 146 * Use with {@link #setThreadPriority(int)} and 147 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 148 * {@link java.lang.Thread} class. 149 */ 150 public static final int THREAD_PRIORITY_LOWEST = 19; 151 152 /** 153 * Standard priority background threads. This gives your thread a slightly 154 * lower than normal priority, so that it will have less chance of impacting 155 * the responsiveness of the user interface. 156 * Use with {@link #setThreadPriority(int)} and 157 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 158 * {@link java.lang.Thread} class. 159 */ 160 public static final int THREAD_PRIORITY_BACKGROUND = 10; 161 162 /** 163 * Standard priority of threads that are currently running a user interface 164 * that the user is interacting with. Applications can not normally 165 * change to this priority; the system will automatically adjust your 166 * application threads as the user moves through the UI. 167 * Use with {@link #setThreadPriority(int)} and 168 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 169 * {@link java.lang.Thread} class. 170 */ 171 public static final int THREAD_PRIORITY_FOREGROUND = -2; 172 173 /** 174 * Standard priority of system display threads, involved in updating 175 * the user interface. Applications can not 176 * normally change to this priority. 177 * Use with {@link #setThreadPriority(int)} and 178 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 179 * {@link java.lang.Thread} class. 180 */ 181 public static final int THREAD_PRIORITY_DISPLAY = -4; 182 183 /** 184 * Standard priority of the most important display threads, for compositing 185 * the screen and retrieving input events. Applications can not normally 186 * 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_DISPLAY = -8; 192 193 /** 194 * Standard priority of audio threads. Applications can not normally 195 * change to this priority. 196 * Use with {@link #setThreadPriority(int)} and 197 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 198 * {@link java.lang.Thread} class. 199 */ 200 public static final int THREAD_PRIORITY_AUDIO = -16; 201 202 /** 203 * Standard priority of the most important audio threads. 204 * Applications can not normally change to this priority. 205 * Use with {@link #setThreadPriority(int)} and 206 * {@link #setThreadPriority(int, int)}, <b>not</b> with the normal 207 * {@link java.lang.Thread} class. 208 */ 209 public static final int THREAD_PRIORITY_URGENT_AUDIO = -19; 210 211 /** 212 * Minimum increment to make a priority more favorable. 213 */ 214 public static final int THREAD_PRIORITY_MORE_FAVORABLE = -1; 215 216 /** 217 * Minimum increment to make a priority less favorable. 218 */ 219 public static final int THREAD_PRIORITY_LESS_FAVORABLE = +1; 220 221 /** 222 * Default thread group - gets a 'normal' share of the CPU 223 * @hide 224 */ 225 public static final int THREAD_GROUP_DEFAULT = 0; 226 227 /** 228 * Background non-interactive thread group - All threads in 229 * this group are scheduled with a reduced share of the CPU. 230 * @hide 231 */ 232 public static final int THREAD_GROUP_BG_NONINTERACTIVE = 1; 233 234 /** 235 * Foreground 'boost' thread group - All threads in 236 * this group are scheduled with an increased share of the CPU 237 * @hide 238 **/ 239 public static final int THREAD_GROUP_FG_BOOST = 2; 240 241 public static final int SIGNAL_QUIT = 3; 242 public static final int SIGNAL_KILL = 9; 243 public static final int SIGNAL_USR1 = 10; 244 245 // State for communicating with zygote process 246 247 static LocalSocket sZygoteSocket; 248 static DataInputStream sZygoteInputStream; 249 static BufferedWriter sZygoteWriter; 250 251 /** true if previous zygote open failed */ 252 static boolean sPreviousZygoteOpenFailed; 253 254 /** 255 * Start a new process. 256 * 257 * <p>If processes are enabled, a new process is created and the 258 * static main() function of a <var>processClass</var> is executed there. 259 * The process will continue running after this function returns. 260 * 261 * <p>If processes are not enabled, a new thread in the caller's 262 * process is created and main() of <var>processClass</var> called there. 263 * 264 * <p>The niceName parameter, if not an empty string, is a custom name to 265 * give to the process instead of using processClass. This allows you to 266 * make easily identifyable processes even if you are using the same base 267 * <var>processClass</var> to start them. 268 * 269 * @param processClass The class to use as the process's main entry 270 * point. 271 * @param niceName A more readable name to use for the process. 272 * @param uid The user-id under which the process will run. 273 * @param gid The group-id under which the process will run. 274 * @param gids Additional group-ids associated with the process. 275 * @param debugFlags Additional flags. 276 * @param targetSdkVersion The target SDK version for the app. 277 * @param zygoteArgs Additional arguments to supply to the zygote process. 278 * 279 * @return An object that describes the result of the attempt to start the process. 280 * @throws RuntimeException on fatal start failure 281 * 282 * {@hide} 283 */ 284 public static final ProcessStartResult start(final String processClass, 285 final String niceName, 286 int uid, int gid, int[] gids, 287 int debugFlags, int targetSdkVersion, 288 String[] zygoteArgs) { 289 try { 290 return startViaZygote(processClass, niceName, uid, gid, gids, 291 debugFlags, targetSdkVersion, zygoteArgs); 292 } catch (ZygoteStartFailedEx ex) { 293 Log.e(LOG_TAG, 294 "Starting VM process through Zygote failed"); 295 throw new RuntimeException( 296 "Starting VM process through Zygote failed", ex); 297 } 298 } 299 300 /** retry interval for opening a zygote socket */ 301 static final int ZYGOTE_RETRY_MILLIS = 500; 302 303 /** 304 * Tries to open socket to Zygote process if not already open. If 305 * already open, does nothing. May block and retry. 306 */ 307 private static void openZygoteSocketIfNeeded() 308 throws ZygoteStartFailedEx { 309 310 int retryCount; 311 312 if (sPreviousZygoteOpenFailed) { 313 /* 314 * If we've failed before, expect that we'll fail again and 315 * don't pause for retries. 316 */ 317 retryCount = 0; 318 } else { 319 retryCount = 10; 320 } 321 322 /* 323 * See bug #811181: Sometimes runtime can make it up before zygote. 324 * Really, we'd like to do something better to avoid this condition, 325 * but for now just wait a bit... 326 */ 327 for (int retry = 0 328 ; (sZygoteSocket == null) && (retry < (retryCount + 1)) 329 ; retry++ ) { 330 331 if (retry > 0) { 332 try { 333 Log.i("Zygote", "Zygote not up yet, sleeping..."); 334 Thread.sleep(ZYGOTE_RETRY_MILLIS); 335 } catch (InterruptedException ex) { 336 // should never happen 337 } 338 } 339 340 try { 341 sZygoteSocket = new LocalSocket(); 342 343 sZygoteSocket.connect(new LocalSocketAddress(ZYGOTE_SOCKET, 344 LocalSocketAddress.Namespace.RESERVED)); 345 346 sZygoteInputStream 347 = new DataInputStream(sZygoteSocket.getInputStream()); 348 349 sZygoteWriter = 350 new BufferedWriter( 351 new OutputStreamWriter( 352 sZygoteSocket.getOutputStream()), 353 256); 354 355 Log.i("Zygote", "Process: zygote socket opened"); 356 357 sPreviousZygoteOpenFailed = false; 358 break; 359 } catch (IOException ex) { 360 if (sZygoteSocket != null) { 361 try { 362 sZygoteSocket.close(); 363 } catch (IOException ex2) { 364 Log.e(LOG_TAG,"I/O exception on close after exception", 365 ex2); 366 } 367 } 368 369 sZygoteSocket = null; 370 } 371 } 372 373 if (sZygoteSocket == null) { 374 sPreviousZygoteOpenFailed = true; 375 throw new ZygoteStartFailedEx("connect failed"); 376 } 377 } 378 379 /** 380 * Sends an argument list to the zygote process, which starts a new child 381 * and returns the child's pid. Please note: the present implementation 382 * replaces newlines in the argument list with spaces. 383 * @param args argument list 384 * @return An object that describes the result of the attempt to start the process. 385 * @throws ZygoteStartFailedEx if process start failed for any reason 386 */ 387 private static ProcessStartResult zygoteSendArgsAndGetResult(ArrayList<String> args) 388 throws ZygoteStartFailedEx { 389 openZygoteSocketIfNeeded(); 390 391 try { 392 /** 393 * See com.android.internal.os.ZygoteInit.readArgumentList() 394 * Presently the wire format to the zygote process is: 395 * a) a count of arguments (argc, in essence) 396 * b) a number of newline-separated argument strings equal to count 397 * 398 * After the zygote process reads these it will write the pid of 399 * the child or -1 on failure, followed by boolean to 400 * indicate whether a wrapper process was used. 401 */ 402 403 sZygoteWriter.write(Integer.toString(args.size())); 404 sZygoteWriter.newLine(); 405 406 int sz = args.size(); 407 for (int i = 0; i < sz; i++) { 408 String arg = args.get(i); 409 if (arg.indexOf('\n') >= 0) { 410 throw new ZygoteStartFailedEx( 411 "embedded newlines not allowed"); 412 } 413 sZygoteWriter.write(arg); 414 sZygoteWriter.newLine(); 415 } 416 417 sZygoteWriter.flush(); 418 419 // Should there be a timeout on this? 420 ProcessStartResult result = new ProcessStartResult(); 421 result.pid = sZygoteInputStream.readInt(); 422 if (result.pid < 0) { 423 throw new ZygoteStartFailedEx("fork() failed"); 424 } 425 result.usingWrapper = sZygoteInputStream.readBoolean(); 426 return result; 427 } catch (IOException ex) { 428 try { 429 if (sZygoteSocket != null) { 430 sZygoteSocket.close(); 431 } 432 } catch (IOException ex2) { 433 // we're going to fail anyway 434 Log.e(LOG_TAG,"I/O exception on routine close", ex2); 435 } 436 437 sZygoteSocket = null; 438 439 throw new ZygoteStartFailedEx(ex); 440 } 441 } 442 443 /** 444 * Starts a new process via the zygote mechanism. 445 * 446 * @param processClass Class name whose static main() to run 447 * @param niceName 'nice' process name to appear in ps 448 * @param uid a POSIX uid that the new process should setuid() to 449 * @param gid a POSIX gid that the new process shuold setgid() to 450 * @param gids null-ok; a list of supplementary group IDs that the 451 * new process should setgroup() to. 452 * @param debugFlags Additional flags. 453 * @param targetSdkVersion The target SDK version for the app. 454 * @param extraArgs Additional arguments to supply to the zygote process. 455 * @return An object that describes the result of the attempt to start the process. 456 * @throws ZygoteStartFailedEx if process start failed for any reason 457 */ 458 private static ProcessStartResult startViaZygote(final String processClass, 459 final String niceName, 460 final int uid, final int gid, 461 final int[] gids, 462 int debugFlags, int targetSdkVersion, 463 String[] extraArgs) 464 throws ZygoteStartFailedEx { 465 synchronized(Process.class) { 466 ArrayList<String> argsForZygote = new ArrayList<String>(); 467 468 // --runtime-init, --setuid=, --setgid=, 469 // and --setgroups= must go first 470 argsForZygote.add("--runtime-init"); 471 argsForZygote.add("--setuid=" + uid); 472 argsForZygote.add("--setgid=" + gid); 473 if ((debugFlags & Zygote.DEBUG_ENABLE_JNI_LOGGING) != 0) { 474 argsForZygote.add("--enable-jni-logging"); 475 } 476 if ((debugFlags & Zygote.DEBUG_ENABLE_SAFEMODE) != 0) { 477 argsForZygote.add("--enable-safemode"); 478 } 479 if ((debugFlags & Zygote.DEBUG_ENABLE_DEBUGGER) != 0) { 480 argsForZygote.add("--enable-debugger"); 481 } 482 if ((debugFlags & Zygote.DEBUG_ENABLE_CHECKJNI) != 0) { 483 argsForZygote.add("--enable-checkjni"); 484 } 485 if ((debugFlags & Zygote.DEBUG_ENABLE_ASSERT) != 0) { 486 argsForZygote.add("--enable-assert"); 487 } 488 argsForZygote.add("--target-sdk-version=" + targetSdkVersion); 489 490 //TODO optionally enable debuger 491 //argsForZygote.add("--enable-debugger"); 492 493 // --setgroups is a comma-separated list 494 if (gids != null && gids.length > 0) { 495 StringBuilder sb = new StringBuilder(); 496 sb.append("--setgroups="); 497 498 int sz = gids.length; 499 for (int i = 0; i < sz; i++) { 500 if (i != 0) { 501 sb.append(','); 502 } 503 sb.append(gids[i]); 504 } 505 506 argsForZygote.add(sb.toString()); 507 } 508 509 if (niceName != null) { 510 argsForZygote.add("--nice-name=" + niceName); 511 } 512 513 argsForZygote.add(processClass); 514 515 if (extraArgs != null) { 516 for (String arg : extraArgs) { 517 argsForZygote.add(arg); 518 } 519 } 520 521 return zygoteSendArgsAndGetResult(argsForZygote); 522 } 523 } 524 525 /** 526 * Returns elapsed milliseconds of the time this process has run. 527 * @return Returns the number of milliseconds this process has return. 528 */ 529 public static final native long getElapsedCpuTime(); 530 531 /** 532 * Returns the identifier of this process, which can be used with 533 * {@link #killProcess} and {@link #sendSignal}. 534 */ 535 public static final native int myPid(); 536 537 /** 538 * Returns the identifier of the calling thread, which be used with 539 * {@link #setThreadPriority(int, int)}. 540 */ 541 public static final native int myTid(); 542 543 /** 544 * Returns the identifier of this process's user. 545 */ 546 public static final native int myUid(); 547 548 /** 549 * Returns the UID assigned to a particular user name, or -1 if there is 550 * none. If the given string consists of only numbers, it is converted 551 * directly to a uid. 552 */ 553 public static final native int getUidForName(String name); 554 555 /** 556 * Returns the GID assigned to a particular user name, or -1 if there is 557 * none. If the given string consists of only numbers, it is converted 558 * directly to a gid. 559 */ 560 public static final native int getGidForName(String name); 561 562 /** 563 * Returns a uid for a currently running process. 564 * @param pid the process id 565 * @return the uid of the process, or -1 if the process is not running. 566 * @hide pending API council review 567 */ 568 public static final int getUidForPid(int pid) { 569 String[] procStatusLabels = { "Uid:" }; 570 long[] procStatusValues = new long[1]; 571 procStatusValues[0] = -1; 572 Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues); 573 return (int) procStatusValues[0]; 574 } 575 576 /** 577 * Returns the parent process id for a currently running process. 578 * @param pid the process id 579 * @return the parent process id of the process, or -1 if the process is not running. 580 * @hide 581 */ 582 public static final int getParentPid(int pid) { 583 String[] procStatusLabels = { "PPid:" }; 584 long[] procStatusValues = new long[1]; 585 procStatusValues[0] = -1; 586 Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues); 587 return (int) procStatusValues[0]; 588 } 589 590 /** 591 * Set the priority of a thread, based on Linux priorities. 592 * 593 * @param tid The identifier of the thread/process to change. 594 * @param priority A Linux priority level, from -20 for highest scheduling 595 * priority to 19 for lowest scheduling priority. 596 * 597 * @throws IllegalArgumentException Throws IllegalArgumentException if 598 * <var>tid</var> does not exist. 599 * @throws SecurityException Throws SecurityException if your process does 600 * not have permission to modify the given thread, or to use the given 601 * priority. 602 */ 603 public static final native void setThreadPriority(int tid, int priority) 604 throws IllegalArgumentException, SecurityException; 605 606 /** 607 * Call with 'false' to cause future calls to {@link #setThreadPriority(int)} to 608 * throw an exception if passed a background-level thread priority. This is only 609 * effective if the JNI layer is built with GUARD_THREAD_PRIORITY defined to 1. 610 * 611 * @hide 612 */ 613 public static final native void setCanSelfBackground(boolean backgroundOk); 614 615 /** 616 * Sets the scheduling group for a thread. 617 * @hide 618 * @param tid The indentifier of the thread/process to change. 619 * @param group The target group for this thread/process. 620 * 621 * @throws IllegalArgumentException Throws IllegalArgumentException if 622 * <var>tid</var> does not exist. 623 * @throws SecurityException Throws SecurityException if your process does 624 * not have permission to modify the given thread, or to use the given 625 * priority. 626 */ 627 public static final native void setThreadGroup(int tid, int group) 628 throws IllegalArgumentException, SecurityException; 629 /** 630 * Sets the scheduling group for a process and all child threads 631 * @hide 632 * @param pid The indentifier of the process to change. 633 * @param group The target group for this process. 634 * 635 * @throws IllegalArgumentException Throws IllegalArgumentException if 636 * <var>tid</var> does not exist. 637 * @throws SecurityException Throws SecurityException if your process does 638 * not have permission to modify the given thread, or to use the given 639 * priority. 640 */ 641 public static final native void setProcessGroup(int pid, int group) 642 throws IllegalArgumentException, SecurityException; 643 644 /** 645 * Set the priority of the calling thread, based on Linux priorities. See 646 * {@link #setThreadPriority(int, int)} for more information. 647 * 648 * @param priority A Linux priority level, from -20 for highest scheduling 649 * priority to 19 for lowest scheduling priority. 650 * 651 * @throws IllegalArgumentException Throws IllegalArgumentException if 652 * <var>tid</var> does not exist. 653 * @throws SecurityException Throws SecurityException if your process does 654 * not have permission to modify the given thread, or to use the given 655 * priority. 656 * 657 * @see #setThreadPriority(int, int) 658 */ 659 public static final native void setThreadPriority(int priority) 660 throws IllegalArgumentException, SecurityException; 661 662 /** 663 * Return the current priority of a thread, based on Linux priorities. 664 * 665 * @param tid The identifier of the thread/process to change. 666 * 667 * @return Returns the current priority, as a Linux priority level, 668 * from -20 for highest scheduling priority to 19 for lowest scheduling 669 * priority. 670 * 671 * @throws IllegalArgumentException Throws IllegalArgumentException if 672 * <var>tid</var> does not exist. 673 */ 674 public static final native int getThreadPriority(int tid) 675 throws IllegalArgumentException; 676 677 /** 678 * Determine whether the current environment supports multiple processes. 679 * 680 * @return Returns true if the system can run in multiple processes, else 681 * false if everything is running in a single process. 682 * 683 * @deprecated This method always returns true. Do not use. 684 */ 685 @Deprecated 686 public static final boolean supportsProcesses() { 687 return true; 688 } 689 690 /** 691 * Set the out-of-memory badness adjustment for a process. 692 * 693 * @param pid The process identifier to set. 694 * @param amt Adjustment value -- linux allows -16 to +15. 695 * 696 * @return Returns true if the underlying system supports this 697 * feature, else false. 698 * 699 * {@hide} 700 */ 701 public static final native boolean setOomAdj(int pid, int amt); 702 703 /** 704 * Change this process's argv[0] parameter. This can be useful to show 705 * more descriptive information in things like the 'ps' command. 706 * 707 * @param text The new name of this process. 708 * 709 * {@hide} 710 */ 711 public static final native void setArgV0(String text); 712 713 /** 714 * Kill the process with the given PID. 715 * Note that, though this API allows us to request to 716 * kill any process based on its PID, the kernel will 717 * still impose standard restrictions on which PIDs you 718 * are actually able to kill. Typically this means only 719 * the process running the caller's packages/application 720 * and any additional processes created by that app; packages 721 * sharing a common UID will also be able to kill each 722 * other's processes. 723 */ 724 public static final void killProcess(int pid) { 725 sendSignal(pid, SIGNAL_KILL); 726 } 727 728 /** @hide */ 729 public static final native int setUid(int uid); 730 731 /** @hide */ 732 public static final native int setGid(int uid); 733 734 /** 735 * Send a signal to the given process. 736 * 737 * @param pid The pid of the target process. 738 * @param signal The signal to send. 739 */ 740 public static final native void sendSignal(int pid, int signal); 741 742 /** 743 * @hide 744 * Private impl for avoiding a log message... DO NOT USE without doing 745 * your own log, or the Android Illuminati will find you some night and 746 * beat you up. 747 */ 748 public static final void killProcessQuiet(int pid) { 749 sendSignalQuiet(pid, SIGNAL_KILL); 750 } 751 752 /** 753 * @hide 754 * Private impl for avoiding a log message... DO NOT USE without doing 755 * your own log, or the Android Illuminati will find you some night and 756 * beat you up. 757 */ 758 public static final native void sendSignalQuiet(int pid, int signal); 759 760 /** @hide */ 761 public static final native long getFreeMemory(); 762 763 /** @hide */ 764 public static final native void readProcLines(String path, 765 String[] reqFields, long[] outSizes); 766 767 /** @hide */ 768 public static final native int[] getPids(String path, int[] lastArray); 769 770 /** @hide */ 771 public static final int PROC_TERM_MASK = 0xff; 772 /** @hide */ 773 public static final int PROC_ZERO_TERM = 0; 774 /** @hide */ 775 public static final int PROC_SPACE_TERM = (int)' '; 776 /** @hide */ 777 public static final int PROC_TAB_TERM = (int)'\t'; 778 /** @hide */ 779 public static final int PROC_COMBINE = 0x100; 780 /** @hide */ 781 public static final int PROC_PARENS = 0x200; 782 /** @hide */ 783 public static final int PROC_OUT_STRING = 0x1000; 784 /** @hide */ 785 public static final int PROC_OUT_LONG = 0x2000; 786 /** @hide */ 787 public static final int PROC_OUT_FLOAT = 0x4000; 788 789 /** @hide */ 790 public static final native boolean readProcFile(String file, int[] format, 791 String[] outStrings, long[] outLongs, float[] outFloats); 792 793 /** @hide */ 794 public static final native boolean parseProcLine(byte[] buffer, int startIndex, 795 int endIndex, int[] format, String[] outStrings, long[] outLongs, float[] outFloats); 796 797 /** 798 * Gets the total Pss value for a given process, in bytes. 799 * 800 * @param pid the process to the Pss for 801 * @return the total Pss value for the given process in bytes, 802 * or -1 if the value cannot be determined 803 * @hide 804 */ 805 public static final native long getPss(int pid); 806 807 /** 808 * Specifies the outcome of having started a process. 809 * @hide 810 */ 811 public static final class ProcessStartResult { 812 /** 813 * The PID of the newly started process. 814 * Always >= 0. (If the start failed, an exception will have been thrown instead.) 815 */ 816 public int pid; 817 818 /** 819 * True if the process was started with a wrapper attached. 820 */ 821 public boolean usingWrapper; 822 } 823 } 824
