1 /* 2 * Copyright (C) 2007 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 com.android.internal.util.FastPrintWriter; 20 import com.android.internal.util.TypedProperties; 21 22 import android.util.Log; 23 24 import java.io.FileDescriptor; 25 import java.io.FileNotFoundException; 26 import java.io.FileOutputStream; 27 import java.io.FileReader; 28 import java.io.IOException; 29 import java.io.OutputStreamWriter; 30 import java.io.PrintWriter; 31 import java.io.Reader; 32 import java.lang.reflect.Field; 33 import java.lang.reflect.Modifier; 34 import java.lang.annotation.Target; 35 import java.lang.annotation.ElementType; 36 import java.lang.annotation.Retention; 37 import java.lang.annotation.RetentionPolicy; 38 39 import org.apache.harmony.dalvik.ddmc.Chunk; 40 import org.apache.harmony.dalvik.ddmc.ChunkHandler; 41 import org.apache.harmony.dalvik.ddmc.DdmServer; 42 43 import dalvik.bytecode.OpcodeInfo; 44 import dalvik.bytecode.Opcodes; 45 import dalvik.system.VMDebug; 46 47 48 /** 49 * Provides various debugging methods for Android applications, including 50 * tracing and allocation counts. 51 * <p><strong>Logging Trace Files</strong></p> 52 * <p>Debug can create log files that give details about an application, such as 53 * a call stack and start/stop times for any running methods. See <a 54 href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Log Viewer</a> for 55 * information about reading trace files. To start logging trace files, call one 56 * of the startMethodTracing() methods. To stop tracing, call 57 * {@link #stopMethodTracing()}. 58 */ 59 public final class Debug 60 { 61 private static final String TAG = "Debug"; 62 63 /** 64 * Flags for startMethodTracing(). These can be ORed together. 65 * 66 * TRACE_COUNT_ALLOCS adds the results from startAllocCounting to the 67 * trace key file. 68 */ 69 public static final int TRACE_COUNT_ALLOCS = VMDebug.TRACE_COUNT_ALLOCS; 70 71 /** 72 * Flags for printLoadedClasses(). Default behavior is to only show 73 * the class name. 74 */ 75 public static final int SHOW_FULL_DETAIL = 1; 76 public static final int SHOW_CLASSLOADER = (1 << 1); 77 public static final int SHOW_INITIALIZED = (1 << 2); 78 79 // set/cleared by waitForDebugger() 80 private static volatile boolean mWaiting = false; 81 82 private Debug() {} 83 84 /* 85 * How long to wait for the debugger to finish sending requests. I've 86 * seen this hit 800msec on the device while waiting for a response 87 * to travel over USB and get processed, so we take that and add 88 * half a second. 89 */ 90 private static final int MIN_DEBUGGER_IDLE = 1300; // msec 91 92 /* how long to sleep when polling for activity */ 93 private static final int SPIN_DELAY = 200; // msec 94 95 /** 96 * Default trace file path and file 97 */ 98 private static final String DEFAULT_TRACE_PATH_PREFIX = 99 Environment.getLegacyExternalStorageDirectory().getPath() + "/"; 100 private static final String DEFAULT_TRACE_BODY = "dmtrace"; 101 private static final String DEFAULT_TRACE_EXTENSION = ".trace"; 102 private static final String DEFAULT_TRACE_FILE_PATH = 103 DEFAULT_TRACE_PATH_PREFIX + DEFAULT_TRACE_BODY 104 + DEFAULT_TRACE_EXTENSION; 105 106 107 /** 108 * This class is used to retrieved various statistics about the memory mappings for this 109 * process. The returns info broken down by dalvik, native, and other. All results are in kB. 110 */ 111 public static class MemoryInfo implements Parcelable { 112 /** The proportional set size for dalvik heap. (Doesn't include other Dalvik overhead.) */ 113 public int dalvikPss; 114 /** The proportional set size that is swappable for dalvik heap. */ 115 /** @hide We may want to expose this, eventually. */ 116 public int dalvikSwappablePss; 117 /** The private dirty pages used by dalvik heap. */ 118 public int dalvikPrivateDirty; 119 /** The shared dirty pages used by dalvik heap. */ 120 public int dalvikSharedDirty; 121 /** The private clean pages used by dalvik heap. */ 122 /** @hide We may want to expose this, eventually. */ 123 public int dalvikPrivateClean; 124 /** The shared clean pages used by dalvik heap. */ 125 /** @hide We may want to expose this, eventually. */ 126 public int dalvikSharedClean; 127 /** The dirty dalvik pages that have been swapped out. */ 128 /** @hide We may want to expose this, eventually. */ 129 public int dalvikSwappedOut; 130 131 /** The proportional set size for the native heap. */ 132 public int nativePss; 133 /** The proportional set size that is swappable for the native heap. */ 134 /** @hide We may want to expose this, eventually. */ 135 public int nativeSwappablePss; 136 /** The private dirty pages used by the native heap. */ 137 public int nativePrivateDirty; 138 /** The shared dirty pages used by the native heap. */ 139 public int nativeSharedDirty; 140 /** The private clean pages used by the native heap. */ 141 /** @hide We may want to expose this, eventually. */ 142 public int nativePrivateClean; 143 /** The shared clean pages used by the native heap. */ 144 /** @hide We may want to expose this, eventually. */ 145 public int nativeSharedClean; 146 /** The dirty native pages that have been swapped out. */ 147 /** @hide We may want to expose this, eventually. */ 148 public int nativeSwappedOut; 149 150 /** The proportional set size for everything else. */ 151 public int otherPss; 152 /** The proportional set size that is swappable for everything else. */ 153 /** @hide We may want to expose this, eventually. */ 154 public int otherSwappablePss; 155 /** The private dirty pages used by everything else. */ 156 public int otherPrivateDirty; 157 /** The shared dirty pages used by everything else. */ 158 public int otherSharedDirty; 159 /** The private clean pages used by everything else. */ 160 /** @hide We may want to expose this, eventually. */ 161 public int otherPrivateClean; 162 /** The shared clean pages used by everything else. */ 163 /** @hide We may want to expose this, eventually. */ 164 public int otherSharedClean; 165 /** The dirty pages used by anyting else that have been swapped out. */ 166 /** @hide We may want to expose this, eventually. */ 167 public int otherSwappedOut; 168 169 /** @hide */ 170 public static final int NUM_OTHER_STATS = 16; 171 172 /** @hide */ 173 public static final int NUM_DVK_STATS = 5; 174 175 /** @hide */ 176 public static final int NUM_CATEGORIES = 7; 177 178 /** @hide */ 179 public static final int offsetPss = 0; 180 /** @hide */ 181 public static final int offsetSwappablePss = 1; 182 /** @hide */ 183 public static final int offsetPrivateDirty = 2; 184 /** @hide */ 185 public static final int offsetSharedDirty = 3; 186 /** @hide */ 187 public static final int offsetPrivateClean = 4; 188 /** @hide */ 189 public static final int offsetSharedClean = 5; 190 /** @hide */ 191 public static final int offsetSwappedOut = 6; 192 193 private int[] otherStats = new int[(NUM_OTHER_STATS+NUM_DVK_STATS)*NUM_CATEGORIES]; 194 195 public MemoryInfo() { 196 } 197 198 /** 199 * Return total PSS memory usage in kB. 200 */ 201 public int getTotalPss() { 202 return dalvikPss + nativePss + otherPss; 203 } 204 205 /** 206 * @hide Return total PSS memory usage in kB. 207 */ 208 public int getTotalUss() { 209 return dalvikPrivateClean + dalvikPrivateDirty 210 + nativePrivateClean + nativePrivateDirty 211 + otherPrivateClean + otherPrivateDirty; 212 } 213 214 /** 215 * Return total PSS memory usage in kB. 216 */ 217 public int getTotalSwappablePss() { 218 return dalvikSwappablePss + nativeSwappablePss + otherSwappablePss; 219 } 220 221 /** 222 * Return total private dirty memory usage in kB. 223 */ 224 public int getTotalPrivateDirty() { 225 return dalvikPrivateDirty + nativePrivateDirty + otherPrivateDirty; 226 } 227 228 /** 229 * Return total shared dirty memory usage in kB. 230 */ 231 public int getTotalSharedDirty() { 232 return dalvikSharedDirty + nativeSharedDirty + otherSharedDirty; 233 } 234 235 /** 236 * Return total shared clean memory usage in kB. 237 */ 238 public int getTotalPrivateClean() { 239 return dalvikPrivateClean + nativePrivateClean + otherPrivateClean; 240 } 241 242 /** 243 * Return total shared clean memory usage in kB. 244 */ 245 public int getTotalSharedClean() { 246 return dalvikSharedClean + nativeSharedClean + otherSharedClean; 247 } 248 249 /** 250 * Return total swapped out memory in kB. 251 * @hide 252 */ 253 public int getTotalSwappedOut() { 254 return dalvikSwappedOut + nativeSwappedOut + otherSwappedOut; 255 } 256 257 /** @hide */ 258 public int getOtherPss(int which) { 259 return otherStats[which*NUM_CATEGORIES + offsetPss]; 260 } 261 262 263 /** @hide */ 264 public int getOtherSwappablePss(int which) { 265 return otherStats[which*NUM_CATEGORIES + offsetSwappablePss]; 266 } 267 268 269 /** @hide */ 270 public int getOtherPrivateDirty(int which) { 271 return otherStats[which*NUM_CATEGORIES + offsetPrivateDirty]; 272 } 273 274 /** @hide */ 275 public int getOtherSharedDirty(int which) { 276 return otherStats[which*NUM_CATEGORIES + offsetSharedDirty]; 277 } 278 279 /** @hide */ 280 public int getOtherPrivateClean(int which) { 281 return otherStats[which*NUM_CATEGORIES + offsetPrivateClean]; 282 } 283 284 /** @hide */ 285 public int getOtherSharedClean(int which) { 286 return otherStats[which*NUM_CATEGORIES + offsetSharedClean]; 287 } 288 289 /** @hide */ 290 public int getOtherSwappedOut(int which) { 291 return otherStats[which*NUM_CATEGORIES + offsetSwappedOut]; 292 } 293 294 /** @hide */ 295 public static String getOtherLabel(int which) { 296 switch (which) { 297 case 0: return "Dalvik Other"; 298 case 1: return "Stack"; 299 case 2: return "Cursor"; 300 case 3: return "Ashmem"; 301 case 4: return "Other dev"; 302 case 5: return ".so mmap"; 303 case 6: return ".jar mmap"; 304 case 7: return ".apk mmap"; 305 case 8: return ".ttf mmap"; 306 case 9: return ".dex mmap"; 307 case 10: return "code mmap"; 308 case 11: return "image mmap"; 309 case 12: return "Other mmap"; 310 case 13: return "Graphics"; 311 case 14: return "GL"; 312 case 15: return "Memtrack"; 313 case 16: return ".Heap"; 314 case 17: return ".LOS"; 315 case 18: return ".LinearAlloc"; 316 case 19: return ".GC"; 317 case 20: return ".JITCache"; 318 default: return "????"; 319 } 320 } 321 322 public int describeContents() { 323 return 0; 324 } 325 326 public void writeToParcel(Parcel dest, int flags) { 327 dest.writeInt(dalvikPss); 328 dest.writeInt(dalvikSwappablePss); 329 dest.writeInt(dalvikPrivateDirty); 330 dest.writeInt(dalvikSharedDirty); 331 dest.writeInt(dalvikPrivateClean); 332 dest.writeInt(dalvikSharedClean); 333 dest.writeInt(dalvikSwappedOut); 334 dest.writeInt(nativePss); 335 dest.writeInt(nativeSwappablePss); 336 dest.writeInt(nativePrivateDirty); 337 dest.writeInt(nativeSharedDirty); 338 dest.writeInt(nativePrivateClean); 339 dest.writeInt(nativeSharedClean); 340 dest.writeInt(nativeSwappedOut); 341 dest.writeInt(otherPss); 342 dest.writeInt(otherSwappablePss); 343 dest.writeInt(otherPrivateDirty); 344 dest.writeInt(otherSharedDirty); 345 dest.writeInt(otherPrivateClean); 346 dest.writeInt(otherSharedClean); 347 dest.writeInt(otherSwappedOut); 348 dest.writeIntArray(otherStats); 349 } 350 351 public void readFromParcel(Parcel source) { 352 dalvikPss = source.readInt(); 353 dalvikSwappablePss = source.readInt(); 354 dalvikPrivateDirty = source.readInt(); 355 dalvikSharedDirty = source.readInt(); 356 dalvikPrivateClean = source.readInt(); 357 dalvikSharedClean = source.readInt(); 358 dalvikSwappedOut = source.readInt(); 359 nativePss = source.readInt(); 360 nativeSwappablePss = source.readInt(); 361 nativePrivateDirty = source.readInt(); 362 nativeSharedDirty = source.readInt(); 363 nativePrivateClean = source.readInt(); 364 nativeSharedClean = source.readInt(); 365 nativeSwappedOut = source.readInt(); 366 otherPss = source.readInt(); 367 otherSwappablePss = source.readInt(); 368 otherPrivateDirty = source.readInt(); 369 otherSharedDirty = source.readInt(); 370 otherPrivateClean = source.readInt(); 371 otherSharedClean = source.readInt(); 372 otherSwappedOut = source.readInt(); 373 otherStats = source.createIntArray(); 374 } 375 376 public static final Creator<MemoryInfo> CREATOR = new Creator<MemoryInfo>() { 377 public MemoryInfo createFromParcel(Parcel source) { 378 return new MemoryInfo(source); 379 } 380 public MemoryInfo[] newArray(int size) { 381 return new MemoryInfo[size]; 382 } 383 }; 384 385 private MemoryInfo(Parcel source) { 386 readFromParcel(source); 387 } 388 } 389 390 391 /** 392 * Wait until a debugger attaches. As soon as the debugger attaches, 393 * this returns, so you will need to place a breakpoint after the 394 * waitForDebugger() call if you want to start tracing immediately. 395 */ 396 public static void waitForDebugger() { 397 if (!VMDebug.isDebuggingEnabled()) { 398 //System.out.println("debugging not enabled, not waiting"); 399 return; 400 } 401 if (isDebuggerConnected()) 402 return; 403 404 // if DDMS is listening, inform them of our plight 405 System.out.println("Sending WAIT chunk"); 406 byte[] data = new byte[] { 0 }; // 0 == "waiting for debugger" 407 Chunk waitChunk = new Chunk(ChunkHandler.type("WAIT"), data, 0, 1); 408 DdmServer.sendChunk(waitChunk); 409 410 mWaiting = true; 411 while (!isDebuggerConnected()) { 412 try { Thread.sleep(SPIN_DELAY); } 413 catch (InterruptedException ie) {} 414 } 415 mWaiting = false; 416 417 System.out.println("Debugger has connected"); 418 419 /* 420 * There is no "ready to go" signal from the debugger, and we're 421 * not allowed to suspend ourselves -- the debugger expects us to 422 * be running happily, and gets confused if we aren't. We need to 423 * allow the debugger a chance to set breakpoints before we start 424 * running again. 425 * 426 * Sit and spin until the debugger has been idle for a short while. 427 */ 428 while (true) { 429 long delta = VMDebug.lastDebuggerActivity(); 430 if (delta < 0) { 431 System.out.println("debugger detached?"); 432 break; 433 } 434 435 if (delta < MIN_DEBUGGER_IDLE) { 436 System.out.println("waiting for debugger to settle..."); 437 try { Thread.sleep(SPIN_DELAY); } 438 catch (InterruptedException ie) {} 439 } else { 440 System.out.println("debugger has settled (" + delta + ")"); 441 break; 442 } 443 } 444 } 445 446 /** 447 * Returns "true" if one or more threads is waiting for a debugger 448 * to attach. 449 */ 450 public static boolean waitingForDebugger() { 451 return mWaiting; 452 } 453 454 /** 455 * Determine if a debugger is currently attached. 456 */ 457 public static boolean isDebuggerConnected() { 458 return VMDebug.isDebuggerConnected(); 459 } 460 461 /** 462 * Returns an array of strings that identify VM features. This is 463 * used by DDMS to determine what sorts of operations the VM can 464 * perform. 465 * 466 * @hide 467 */ 468 public static String[] getVmFeatureList() { 469 return VMDebug.getVmFeatureList(); 470 } 471 472 /** 473 * Change the JDWP port. 474 * 475 * @deprecated no longer needed or useful 476 */ 477 @Deprecated 478 public static void changeDebugPort(int port) {} 479 480 /** 481 * This is the pathname to the sysfs file that enables and disables 482 * tracing on the qemu emulator. 483 */ 484 private static final String SYSFS_QEMU_TRACE_STATE = "/sys/qemu_trace/state"; 485 486 /** 487 * Enable qemu tracing. For this to work requires running everything inside 488 * the qemu emulator; otherwise, this method will have no effect. The trace 489 * file is specified on the command line when the emulator is started. For 490 * example, the following command line <br /> 491 * <code>emulator -trace foo</code><br /> 492 * will start running the emulator and create a trace file named "foo". This 493 * method simply enables writing the trace records to the trace file. 494 * 495 * <p> 496 * The main differences between this and {@link #startMethodTracing()} are 497 * that tracing in the qemu emulator traces every cpu instruction of every 498 * process, including kernel code, so we have more complete information, 499 * including all context switches. We can also get more detailed information 500 * such as cache misses. The sequence of calls is determined by 501 * post-processing the instruction trace. The qemu tracing is also done 502 * without modifying the application or perturbing the timing of calls 503 * because no instrumentation is added to the application being traced. 504 * </p> 505 * 506 * <p> 507 * One limitation of using this method compared to using 508 * {@link #startMethodTracing()} on the real device is that the emulator 509 * does not model all of the real hardware effects such as memory and 510 * bus contention. The emulator also has a simple cache model and cannot 511 * capture all the complexities of a real cache. 512 * </p> 513 */ 514 public static void startNativeTracing() { 515 // Open the sysfs file for writing and write "1" to it. 516 PrintWriter outStream = null; 517 try { 518 FileOutputStream fos = new FileOutputStream(SYSFS_QEMU_TRACE_STATE); 519 outStream = new FastPrintWriter(fos); 520 outStream.println("1"); 521 } catch (Exception e) { 522 } finally { 523 if (outStream != null) 524 outStream.close(); 525 } 526 527 VMDebug.startEmulatorTracing(); 528 } 529 530 /** 531 * Stop qemu tracing. See {@link #startNativeTracing()} to start tracing. 532 * 533 * <p>Tracing can be started and stopped as many times as desired. When 534 * the qemu emulator itself is stopped then the buffered trace records 535 * are flushed and written to the trace file. In fact, it is not necessary 536 * to call this method at all; simply killing qemu is sufficient. But 537 * starting and stopping a trace is useful for examining a specific 538 * region of code.</p> 539 */ 540 public static void stopNativeTracing() { 541 VMDebug.stopEmulatorTracing(); 542 543 // Open the sysfs file for writing and write "0" to it. 544 PrintWriter outStream = null; 545 try { 546 FileOutputStream fos = new FileOutputStream(SYSFS_QEMU_TRACE_STATE); 547 outStream = new FastPrintWriter(fos); 548 outStream.println("0"); 549 } catch (Exception e) { 550 // We could print an error message here but we probably want 551 // to quietly ignore errors if we are not running in the emulator. 552 } finally { 553 if (outStream != null) 554 outStream.close(); 555 } 556 } 557 558 /** 559 * Enable "emulator traces", in which information about the current 560 * method is made available to the "emulator -trace" feature. There 561 * is no corresponding "disable" call -- this is intended for use by 562 * the framework when tracing should be turned on and left that way, so 563 * that traces captured with F9/F10 will include the necessary data. 564 * 565 * This puts the VM into "profile" mode, which has performance 566 * consequences. 567 * 568 * To temporarily enable tracing, use {@link #startNativeTracing()}. 569 */ 570 public static void enableEmulatorTraceOutput() { 571 VMDebug.startEmulatorTracing(); 572 } 573 574 /** 575 * Start method tracing with default log name and buffer size. See <a 576 href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Log Viewer</a> for 577 * information about reading these files. Call stopMethodTracing() to stop 578 * tracing. 579 */ 580 public static void startMethodTracing() { 581 VMDebug.startMethodTracing(DEFAULT_TRACE_FILE_PATH, 0, 0); 582 } 583 584 /** 585 * Start method tracing, specifying the trace log file name. The trace 586 * file will be put under "/sdcard" unless an absolute path is given. 587 * See <a 588 href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Log Viewer</a> for 589 * information about reading trace files. 590 * 591 * @param traceName Name for the trace log file to create. 592 * If no name argument is given, this value defaults to "/sdcard/dmtrace.trace". 593 * If the files already exist, they will be truncated. 594 * If the trace file given does not end in ".trace", it will be appended for you. 595 */ 596 public static void startMethodTracing(String traceName) { 597 startMethodTracing(traceName, 0, 0); 598 } 599 600 /** 601 * Start method tracing, specifying the trace log file name and the 602 * buffer size. The trace files will be put under "/sdcard" unless an 603 * absolute path is given. See <a 604 href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Log Viewer</a> for 605 * information about reading trace files. 606 * @param traceName Name for the trace log file to create. 607 * If no name argument is given, this value defaults to "/sdcard/dmtrace.trace". 608 * If the files already exist, they will be truncated. 609 * If the trace file given does not end in ".trace", it will be appended for you. 610 * 611 * @param bufferSize The maximum amount of trace data we gather. If not given, it defaults to 8MB. 612 */ 613 public static void startMethodTracing(String traceName, int bufferSize) { 614 startMethodTracing(traceName, bufferSize, 0); 615 } 616 617 /** 618 * Start method tracing, specifying the trace log file name and the 619 * buffer size. The trace files will be put under "/sdcard" unless an 620 * absolute path is given. See <a 621 href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Log Viewer</a> for 622 * information about reading trace files. 623 * 624 * <p> 625 * When method tracing is enabled, the VM will run more slowly than 626 * usual, so the timings from the trace files should only be considered 627 * in relative terms (e.g. was run #1 faster than run #2). The times 628 * for native methods will not change, so don't try to use this to 629 * compare the performance of interpreted and native implementations of the 630 * same method. As an alternative, consider using "native" tracing 631 * in the emulator via {@link #startNativeTracing()}. 632 * </p> 633 * 634 * @param traceName Name for the trace log file to create. 635 * If no name argument is given, this value defaults to "/sdcard/dmtrace.trace". 636 * If the files already exist, they will be truncated. 637 * If the trace file given does not end in ".trace", it will be appended for you. 638 * @param bufferSize The maximum amount of trace data we gather. If not given, it defaults to 8MB. 639 */ 640 public static void startMethodTracing(String traceName, int bufferSize, 641 int flags) { 642 643 String pathName = traceName; 644 if (pathName.charAt(0) != '/') 645 pathName = DEFAULT_TRACE_PATH_PREFIX + pathName; 646 if (!pathName.endsWith(DEFAULT_TRACE_EXTENSION)) 647 pathName = pathName + DEFAULT_TRACE_EXTENSION; 648 649 VMDebug.startMethodTracing(pathName, bufferSize, flags); 650 } 651 652 /** 653 * Like startMethodTracing(String, int, int), but taking an already-opened 654 * FileDescriptor in which the trace is written. The file name is also 655 * supplied simply for logging. Makes a dup of the file descriptor. 656 * 657 * Not exposed in the SDK unless we are really comfortable with supporting 658 * this and find it would be useful. 659 * @hide 660 */ 661 public static void startMethodTracing(String traceName, FileDescriptor fd, 662 int bufferSize, int flags) { 663 VMDebug.startMethodTracing(traceName, fd, bufferSize, flags); 664 } 665 666 /** 667 * Starts method tracing without a backing file. When stopMethodTracing 668 * is called, the result is sent directly to DDMS. (If DDMS is not 669 * attached when tracing ends, the profiling data will be discarded.) 670 * 671 * @hide 672 */ 673 public static void startMethodTracingDdms(int bufferSize, int flags, 674 boolean samplingEnabled, int intervalUs) { 675 VMDebug.startMethodTracingDdms(bufferSize, flags, samplingEnabled, intervalUs); 676 } 677 678 /** 679 * Determine whether method tracing is currently active and what type is 680 * active. 681 * 682 * @hide 683 */ 684 public static int getMethodTracingMode() { 685 return VMDebug.getMethodTracingMode(); 686 } 687 688 /** 689 * Stop method tracing. 690 */ 691 public static void stopMethodTracing() { 692 VMDebug.stopMethodTracing(); 693 } 694 695 /** 696 * Get an indication of thread CPU usage. The value returned 697 * indicates the amount of time that the current thread has spent 698 * executing code or waiting for certain types of I/O. 699 * 700 * The time is expressed in nanoseconds, and is only meaningful 701 * when compared to the result from an earlier call. Note that 702 * nanosecond resolution does not imply nanosecond accuracy. 703 * 704 * On system which don't support this operation, the call returns -1. 705 */ 706 public static long threadCpuTimeNanos() { 707 return VMDebug.threadCpuTimeNanos(); 708 } 709 710 /** 711 * Start counting the number and aggregate size of memory allocations. 712 * 713 * <p>The {@link #startAllocCounting() start} method resets the counts and enables counting. 714 * The {@link #stopAllocCounting() stop} method disables the counting so that the analysis 715 * code doesn't cause additional allocations. The various <code>get</code> methods return 716 * the specified value. And the various <code>reset</code> methods reset the specified 717 * count.</p> 718 * 719 * <p>Counts are kept for the system as a whole (global) and for each thread. 720 * The per-thread counts for threads other than the current thread 721 * are not cleared by the "reset" or "start" calls.</p> 722 * 723 * @deprecated Accurate counting is a burden on the runtime and may be removed. 724 */ 725 @Deprecated 726 public static void startAllocCounting() { 727 VMDebug.startAllocCounting(); 728 } 729 730 /** 731 * Stop counting the number and aggregate size of memory allocations. 732 * 733 * @see #startAllocCounting() 734 */ 735 @Deprecated 736 public static void stopAllocCounting() { 737 VMDebug.stopAllocCounting(); 738 } 739 740 /** 741 * Returns the global count of objects allocated by the runtime between a 742 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 743 */ 744 public static int getGlobalAllocCount() { 745 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_ALLOCATED_OBJECTS); 746 } 747 748 /** 749 * Clears the global count of objects allocated. 750 * @see #getGlobalAllocCount() 751 */ 752 public static void resetGlobalAllocCount() { 753 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_ALLOCATED_OBJECTS); 754 } 755 756 /** 757 * Returns the global size, in bytes, of objects allocated by the runtime between a 758 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 759 */ 760 public static int getGlobalAllocSize() { 761 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_ALLOCATED_BYTES); 762 } 763 764 /** 765 * Clears the global size of objects allocated. 766 * @see #getGlobalAllocSize() 767 */ 768 public static void resetGlobalAllocSize() { 769 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_ALLOCATED_BYTES); 770 } 771 772 /** 773 * Returns the global count of objects freed by the runtime between a 774 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 775 */ 776 public static int getGlobalFreedCount() { 777 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_FREED_OBJECTS); 778 } 779 780 /** 781 * Clears the global count of objects freed. 782 * @see #getGlobalFreedCount() 783 */ 784 public static void resetGlobalFreedCount() { 785 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_FREED_OBJECTS); 786 } 787 788 /** 789 * Returns the global size, in bytes, of objects freed by the runtime between a 790 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 791 */ 792 public static int getGlobalFreedSize() { 793 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_FREED_BYTES); 794 } 795 796 /** 797 * Clears the global size of objects freed. 798 * @see #getGlobalFreedSize() 799 */ 800 public static void resetGlobalFreedSize() { 801 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_FREED_BYTES); 802 } 803 804 /** 805 * Returns the number of non-concurrent GC invocations between a 806 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 807 */ 808 public static int getGlobalGcInvocationCount() { 809 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_GC_INVOCATIONS); 810 } 811 812 /** 813 * Clears the count of non-concurrent GC invocations. 814 * @see #getGlobalGcInvocationCount() 815 */ 816 public static void resetGlobalGcInvocationCount() { 817 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_GC_INVOCATIONS); 818 } 819 820 /** 821 * Returns the number of classes successfully initialized (ie those that executed without 822 * throwing an exception) between a {@link #startAllocCounting() start} and 823 * {@link #stopAllocCounting() stop}. 824 */ 825 public static int getGlobalClassInitCount() { 826 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_CLASS_INIT_COUNT); 827 } 828 829 /** 830 * Clears the count of classes initialized. 831 * @see #getGlobalClassInitCount() 832 */ 833 public static void resetGlobalClassInitCount() { 834 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_CLASS_INIT_COUNT); 835 } 836 837 /** 838 * Returns the time spent successfully initializing classes between a 839 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 840 */ 841 public static int getGlobalClassInitTime() { 842 /* cumulative elapsed time for class initialization, in usec */ 843 return VMDebug.getAllocCount(VMDebug.KIND_GLOBAL_CLASS_INIT_TIME); 844 } 845 846 /** 847 * Clears the count of time spent initializing classes. 848 * @see #getGlobalClassInitTime() 849 */ 850 public static void resetGlobalClassInitTime() { 851 VMDebug.resetAllocCount(VMDebug.KIND_GLOBAL_CLASS_INIT_TIME); 852 } 853 854 /** 855 * This method exists for compatibility and always returns 0. 856 * @deprecated This method is now obsolete. 857 */ 858 @Deprecated 859 public static int getGlobalExternalAllocCount() { 860 return 0; 861 } 862 863 /** 864 * This method exists for compatibility and has no effect. 865 * @deprecated This method is now obsolete. 866 */ 867 @Deprecated 868 public static void resetGlobalExternalAllocSize() {} 869 870 /** 871 * This method exists for compatibility and has no effect. 872 * @deprecated This method is now obsolete. 873 */ 874 @Deprecated 875 public static void resetGlobalExternalAllocCount() {} 876 877 /** 878 * This method exists for compatibility and always returns 0. 879 * @deprecated This method is now obsolete. 880 */ 881 @Deprecated 882 public static int getGlobalExternalAllocSize() { 883 return 0; 884 } 885 886 /** 887 * This method exists for compatibility and always returns 0. 888 * @deprecated This method is now obsolete. 889 */ 890 @Deprecated 891 public static int getGlobalExternalFreedCount() { 892 return 0; 893 } 894 895 /** 896 * This method exists for compatibility and has no effect. 897 * @deprecated This method is now obsolete. 898 */ 899 @Deprecated 900 public static void resetGlobalExternalFreedCount() {} 901 902 /** 903 * This method exists for compatibility and has no effect. 904 * @deprecated This method is now obsolete. 905 */ 906 @Deprecated 907 public static int getGlobalExternalFreedSize() { 908 return 0; 909 } 910 911 /** 912 * This method exists for compatibility and has no effect. 913 * @deprecated This method is now obsolete. 914 */ 915 @Deprecated 916 public static void resetGlobalExternalFreedSize() {} 917 918 /** 919 * Returns the thread-local count of objects allocated by the runtime between a 920 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 921 */ 922 public static int getThreadAllocCount() { 923 return VMDebug.getAllocCount(VMDebug.KIND_THREAD_ALLOCATED_OBJECTS); 924 } 925 926 /** 927 * Clears the thread-local count of objects allocated. 928 * @see #getThreadAllocCount() 929 */ 930 public static void resetThreadAllocCount() { 931 VMDebug.resetAllocCount(VMDebug.KIND_THREAD_ALLOCATED_OBJECTS); 932 } 933 934 /** 935 * Returns the thread-local size of objects allocated by the runtime between a 936 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 937 * @return The allocated size in bytes. 938 */ 939 public static int getThreadAllocSize() { 940 return VMDebug.getAllocCount(VMDebug.KIND_THREAD_ALLOCATED_BYTES); 941 } 942 943 /** 944 * Clears the thread-local count of objects allocated. 945 * @see #getThreadAllocSize() 946 */ 947 public static void resetThreadAllocSize() { 948 VMDebug.resetAllocCount(VMDebug.KIND_THREAD_ALLOCATED_BYTES); 949 } 950 951 /** 952 * This method exists for compatibility and has no effect. 953 * @deprecated This method is now obsolete. 954 */ 955 @Deprecated 956 public static int getThreadExternalAllocCount() { 957 return 0; 958 } 959 960 /** 961 * This method exists for compatibility and has no effect. 962 * @deprecated This method is now obsolete. 963 */ 964 @Deprecated 965 public static void resetThreadExternalAllocCount() {} 966 967 /** 968 * This method exists for compatibility and has no effect. 969 * @deprecated This method is now obsolete. 970 */ 971 @Deprecated 972 public static int getThreadExternalAllocSize() { 973 return 0; 974 } 975 976 /** 977 * This method exists for compatibility and has no effect. 978 * @deprecated This method is now obsolete. 979 */ 980 @Deprecated 981 public static void resetThreadExternalAllocSize() {} 982 983 /** 984 * Returns the number of thread-local non-concurrent GC invocations between a 985 * {@link #startAllocCounting() start} and {@link #stopAllocCounting() stop}. 986 */ 987 public static int getThreadGcInvocationCount() { 988 return VMDebug.getAllocCount(VMDebug.KIND_THREAD_GC_INVOCATIONS); 989 } 990 991 /** 992 * Clears the thread-local count of non-concurrent GC invocations. 993 * @see #getThreadGcInvocationCount() 994 */ 995 public static void resetThreadGcInvocationCount() { 996 VMDebug.resetAllocCount(VMDebug.KIND_THREAD_GC_INVOCATIONS); 997 } 998 999 /** 1000 * Clears all the global and thread-local memory allocation counters. 1001 * @see #startAllocCounting() 1002 */ 1003 public static void resetAllCounts() { 1004 VMDebug.resetAllocCount(VMDebug.KIND_ALL_COUNTS); 1005 } 1006 1007 /** 1008 * Returns the size of the native heap. 1009 * @return The size of the native heap in bytes. 1010 */ 1011 public static native long getNativeHeapSize(); 1012 1013 /** 1014 * Returns the amount of allocated memory in the native heap. 1015 * @return The allocated size in bytes. 1016 */ 1017 public static native long getNativeHeapAllocatedSize(); 1018 1019 /** 1020 * Returns the amount of free memory in the native heap. 1021 * @return The freed size in bytes. 1022 */ 1023 public static native long getNativeHeapFreeSize(); 1024 1025 /** 1026 * Retrieves information about this processes memory usages. This information is broken down by 1027 * how much is in use by dalivk, the native heap, and everything else. 1028 */ 1029 public static native void getMemoryInfo(MemoryInfo memoryInfo); 1030 1031 /** 1032 * Note: currently only works when the requested pid has the same UID 1033 * as the caller. 1034 * @hide 1035 */ 1036 public static native void getMemoryInfo(int pid, MemoryInfo memoryInfo); 1037 1038 /** 1039 * Retrieves the PSS memory used by the process as given by the 1040 * smaps. 1041 */ 1042 public static native long getPss(); 1043 1044 /** 1045 * Retrieves the PSS memory used by the process as given by the 1046 * smaps. Optionally supply a long array of 1 entry to also 1047 * receive the uss of the process. @hide 1048 */ 1049 public static native long getPss(int pid, long[] outUss); 1050 1051 /** @hide */ 1052 public static final int MEMINFO_TOTAL = 0; 1053 /** @hide */ 1054 public static final int MEMINFO_FREE = 1; 1055 /** @hide */ 1056 public static final int MEMINFO_BUFFERS = 2; 1057 /** @hide */ 1058 public static final int MEMINFO_CACHED = 3; 1059 /** @hide */ 1060 public static final int MEMINFO_SHMEM = 4; 1061 /** @hide */ 1062 public static final int MEMINFO_SLAB = 5; 1063 /** @hide */ 1064 public static final int MEMINFO_SWAP_TOTAL = 6; 1065 /** @hide */ 1066 public static final int MEMINFO_SWAP_FREE = 7; 1067 /** @hide */ 1068 public static final int MEMINFO_ZRAM_TOTAL = 8; 1069 /** @hide */ 1070 public static final int MEMINFO_COUNT = 9; 1071 1072 /** 1073 * Retrieves /proc/meminfo. outSizes is filled with fields 1074 * as defined by MEMINFO_* offsets. 1075 * @hide 1076 */ 1077 public static native void getMemInfo(long[] outSizes); 1078 1079 /** 1080 * Establish an object allocation limit in the current thread. 1081 * This feature was never enabled in release builds. The 1082 * allocation limits feature was removed in Honeycomb. This 1083 * method exists for compatibility and always returns -1 and has 1084 * no effect. 1085 * 1086 * @deprecated This method is now obsolete. 1087 */ 1088 @Deprecated 1089 public static int setAllocationLimit(int limit) { 1090 return -1; 1091 } 1092 1093 /** 1094 * Establish a global object allocation limit. This feature was 1095 * never enabled in release builds. The allocation limits feature 1096 * was removed in Honeycomb. This method exists for compatibility 1097 * and always returns -1 and has no effect. 1098 * 1099 * @deprecated This method is now obsolete. 1100 */ 1101 @Deprecated 1102 public static int setGlobalAllocationLimit(int limit) { 1103 return -1; 1104 } 1105 1106 /** 1107 * Dump a list of all currently loaded class to the log file. 1108 * 1109 * @param flags See constants above. 1110 */ 1111 public static void printLoadedClasses(int flags) { 1112 VMDebug.printLoadedClasses(flags); 1113 } 1114 1115 /** 1116 * Get the number of loaded classes. 1117 * @return the number of loaded classes. 1118 */ 1119 public static int getLoadedClassCount() { 1120 return VMDebug.getLoadedClassCount(); 1121 } 1122 1123 /** 1124 * Dump "hprof" data to the specified file. This may cause a GC. 1125 * 1126 * @param fileName Full pathname of output file (e.g. "/sdcard/dump.hprof"). 1127 * @throws UnsupportedOperationException if the VM was built without 1128 * HPROF support. 1129 * @throws IOException if an error occurs while opening or writing files. 1130 */ 1131 public static void dumpHprofData(String fileName) throws IOException { 1132 VMDebug.dumpHprofData(fileName); 1133 } 1134 1135 /** 1136 * Like dumpHprofData(String), but takes an already-opened 1137 * FileDescriptor to which the trace is written. The file name is also 1138 * supplied simply for logging. Makes a dup of the file descriptor. 1139 * 1140 * Primarily for use by the "am" shell command. 1141 * 1142 * @hide 1143 */ 1144 public static void dumpHprofData(String fileName, FileDescriptor fd) 1145 throws IOException { 1146 VMDebug.dumpHprofData(fileName, fd); 1147 } 1148 1149 /** 1150 * Collect "hprof" and send it to DDMS. This may cause a GC. 1151 * 1152 * @throws UnsupportedOperationException if the VM was built without 1153 * HPROF support. 1154 * @hide 1155 */ 1156 public static void dumpHprofDataDdms() { 1157 VMDebug.dumpHprofDataDdms(); 1158 } 1159 1160 /** 1161 * Writes native heap data to the specified file descriptor. 1162 * 1163 * @hide 1164 */ 1165 public static native void dumpNativeHeap(FileDescriptor fd); 1166 1167 /** 1168 * Returns a count of the extant instances of a class. 1169 * 1170 * @hide 1171 */ 1172 public static long countInstancesOfClass(Class cls) { 1173 return VMDebug.countInstancesOfClass(cls, true); 1174 } 1175 1176 /** 1177 * Returns the number of sent transactions from this process. 1178 * @return The number of sent transactions or -1 if it could not read t. 1179 */ 1180 public static native int getBinderSentTransactions(); 1181 1182 /** 1183 * Returns the number of received transactions from the binder driver. 1184 * @return The number of received transactions or -1 if it could not read the stats. 1185 */ 1186 public static native int getBinderReceivedTransactions(); 1187 1188 /** 1189 * Returns the number of active local Binder objects that exist in the 1190 * current process. 1191 */ 1192 public static final native int getBinderLocalObjectCount(); 1193 1194 /** 1195 * Returns the number of references to remote proxy Binder objects that 1196 * exist in the current process. 1197 */ 1198 public static final native int getBinderProxyObjectCount(); 1199 1200 /** 1201 * Returns the number of death notification links to Binder objects that 1202 * exist in the current process. 1203 */ 1204 public static final native int getBinderDeathObjectCount(); 1205 1206 /** 1207 * Primes the register map cache. 1208 * 1209 * Only works for classes in the bootstrap class loader. Does not 1210 * cause classes to be loaded if they're not already present. 1211 * 1212 * The classAndMethodDesc argument is a concatentation of the VM-internal 1213 * class descriptor, method name, and method descriptor. Examples: 1214 * Landroid/os/Looper;.loop:()V 1215 * Landroid/app/ActivityThread;.main:([Ljava/lang/String;)V 1216 * 1217 * @param classAndMethodDesc the method to prepare 1218 * 1219 * @hide 1220 */ 1221 public static final boolean cacheRegisterMap(String classAndMethodDesc) { 1222 return VMDebug.cacheRegisterMap(classAndMethodDesc); 1223 } 1224 1225 /** 1226 * Dumps the contents of VM reference tables (e.g. JNI locals and 1227 * globals) to the log file. 1228 * 1229 * @hide 1230 */ 1231 public static final void dumpReferenceTables() { 1232 VMDebug.dumpReferenceTables(); 1233 } 1234 1235 /** 1236 * API for gathering and querying instruction counts. 1237 * 1238 * Example usage: 1239 * <pre> 1240 * Debug.InstructionCount icount = new Debug.InstructionCount(); 1241 * icount.resetAndStart(); 1242 * [... do lots of stuff ...] 1243 * if (icount.collect()) { 1244 * System.out.println("Total instructions executed: " 1245 * + icount.globalTotal()); 1246 * System.out.println("Method invocations: " 1247 * + icount.globalMethodInvocations()); 1248 * } 1249 * </pre> 1250 */ 1251 public static class InstructionCount { 1252 private static final int NUM_INSTR = 1253 OpcodeInfo.MAXIMUM_PACKED_VALUE + 1; 1254 1255 private int[] mCounts; 1256 1257 public InstructionCount() { 1258 mCounts = new int[NUM_INSTR]; 1259 } 1260 1261 /** 1262 * Reset counters and ensure counts are running. Counts may 1263 * have already been running. 1264 * 1265 * @return true if counting was started 1266 */ 1267 public boolean resetAndStart() { 1268 try { 1269 VMDebug.startInstructionCounting(); 1270 VMDebug.resetInstructionCount(); 1271 } catch (UnsupportedOperationException uoe) { 1272 return false; 1273 } 1274 return true; 1275 } 1276 1277 /** 1278 * Collect instruction counts. May or may not stop the 1279 * counting process. 1280 */ 1281 public boolean collect() { 1282 try { 1283 VMDebug.stopInstructionCounting(); 1284 VMDebug.getInstructionCount(mCounts); 1285 } catch (UnsupportedOperationException uoe) { 1286 return false; 1287 } 1288 return true; 1289 } 1290 1291 /** 1292 * Return the total number of instructions executed globally (i.e. in 1293 * all threads). 1294 */ 1295 public int globalTotal() { 1296 int count = 0; 1297 1298 for (int i = 0; i < NUM_INSTR; i++) { 1299 count += mCounts[i]; 1300 } 1301 1302 return count; 1303 } 1304 1305 /** 1306 * Return the total number of method-invocation instructions 1307 * executed globally. 1308 */ 1309 public int globalMethodInvocations() { 1310 int count = 0; 1311 1312 for (int i = 0; i < NUM_INSTR; i++) { 1313 if (OpcodeInfo.isInvoke(i)) { 1314 count += mCounts[i]; 1315 } 1316 } 1317 1318 return count; 1319 } 1320 } 1321 1322 /** 1323 * A Map of typed debug properties. 1324 */ 1325 private static final TypedProperties debugProperties; 1326 1327 /* 1328 * Load the debug properties from the standard files into debugProperties. 1329 */ 1330 static { 1331 if (false) { 1332 final String TAG = "DebugProperties"; 1333 final String[] files = { "/system/debug.prop", "/debug.prop", "/data/debug.prop" }; 1334 final TypedProperties tp = new TypedProperties(); 1335 1336 // Read the properties from each of the files, if present. 1337 for (String file : files) { 1338 Reader r; 1339 try { 1340 r = new FileReader(file); 1341 } catch (FileNotFoundException ex) { 1342 // It's ok if a file is missing. 1343 continue; 1344 } 1345 1346 try { 1347 tp.load(r); 1348 } catch (Exception ex) { 1349 throw new RuntimeException("Problem loading " + file, ex); 1350 } finally { 1351 try { 1352 r.close(); 1353 } catch (IOException ex) { 1354 // Ignore this error. 1355 } 1356 } 1357 } 1358 1359 debugProperties = tp.isEmpty() ? null : tp; 1360 } else { 1361 debugProperties = null; 1362 } 1363 } 1364 1365 1366 /** 1367 * Returns true if the type of the field matches the specified class. 1368 * Handles the case where the class is, e.g., java.lang.Boolean, but 1369 * the field is of the primitive "boolean" type. Also handles all of 1370 * the java.lang.Number subclasses. 1371 */ 1372 private static boolean fieldTypeMatches(Field field, Class<?> cl) { 1373 Class<?> fieldClass = field.getType(); 1374 if (fieldClass == cl) { 1375 return true; 1376 } 1377 Field primitiveTypeField; 1378 try { 1379 /* All of the classes we care about (Boolean, Integer, etc.) 1380 * have a Class field called "TYPE" that points to the corresponding 1381 * primitive class. 1382 */ 1383 primitiveTypeField = cl.getField("TYPE"); 1384 } catch (NoSuchFieldException ex) { 1385 return false; 1386 } 1387 try { 1388 return fieldClass == (Class<?>) primitiveTypeField.get(null); 1389 } catch (IllegalAccessException ex) { 1390 return false; 1391 } 1392 } 1393 1394 1395 /** 1396 * Looks up the property that corresponds to the field, and sets the field's value 1397 * if the types match. 1398 */ 1399 private static void modifyFieldIfSet(final Field field, final TypedProperties properties, 1400 final String propertyName) { 1401 if (field.getType() == java.lang.String.class) { 1402 int stringInfo = properties.getStringInfo(propertyName); 1403 switch (stringInfo) { 1404 case TypedProperties.STRING_SET: 1405 // Handle as usual below. 1406 break; 1407 case TypedProperties.STRING_NULL: 1408 try { 1409 field.set(null, null); // null object for static fields; null string 1410 } catch (IllegalAccessException ex) { 1411 throw new IllegalArgumentException( 1412 "Cannot set field for " + propertyName, ex); 1413 } 1414 return; 1415 case TypedProperties.STRING_NOT_SET: 1416 return; 1417 case TypedProperties.STRING_TYPE_MISMATCH: 1418 throw new IllegalArgumentException( 1419 "Type of " + propertyName + " " + 1420 " does not match field type (" + field.getType() + ")"); 1421 default: 1422 throw new IllegalStateException( 1423 "Unexpected getStringInfo(" + propertyName + ") return value " + 1424 stringInfo); 1425 } 1426 } 1427 Object value = properties.get(propertyName); 1428 if (value != null) { 1429 if (!fieldTypeMatches(field, value.getClass())) { 1430 throw new IllegalArgumentException( 1431 "Type of " + propertyName + " (" + value.getClass() + ") " + 1432 " does not match field type (" + field.getType() + ")"); 1433 } 1434 try { 1435 field.set(null, value); // null object for static fields 1436 } catch (IllegalAccessException ex) { 1437 throw new IllegalArgumentException( 1438 "Cannot set field for " + propertyName, ex); 1439 } 1440 } 1441 } 1442 1443 1444 /** 1445 * Equivalent to <code>setFieldsOn(cl, false)</code>. 1446 * 1447 * @see #setFieldsOn(Class, boolean) 1448 * 1449 * @hide 1450 */ 1451 public static void setFieldsOn(Class<?> cl) { 1452 setFieldsOn(cl, false); 1453 } 1454 1455 /** 1456 * Reflectively sets static fields of a class based on internal debugging 1457 * properties. This method is a no-op if false is 1458 * false. 1459 * <p> 1460 * <strong>NOTE TO APPLICATION DEVELOPERS</strong>: false will 1461 * always be false in release builds. This API is typically only useful 1462 * for platform developers. 1463 * </p> 1464 * Class setup: define a class whose only fields are non-final, static 1465 * primitive types (except for "char") or Strings. In a static block 1466 * after the field definitions/initializations, pass the class to 1467 * this method, Debug.setFieldsOn(). Example: 1468 * <pre> 1469 * package com.example; 1470 * 1471 * import android.os.Debug; 1472 * 1473 * public class MyDebugVars { 1474 * public static String s = "a string"; 1475 * public static String s2 = "second string"; 1476 * public static String ns = null; 1477 * public static boolean b = false; 1478 * public static int i = 5; 1479 * @Debug.DebugProperty 1480 * public static float f = 0.1f; 1481 * @@Debug.DebugProperty 1482 * public static double d = 0.5d; 1483 * 1484 * // This MUST appear AFTER all fields are defined and initialized! 1485 * static { 1486 * // Sets all the fields 1487 * Debug.setFieldsOn(MyDebugVars.class); 1488 * 1489 * // Sets only the fields annotated with @Debug.DebugProperty 1490 * // Debug.setFieldsOn(MyDebugVars.class, true); 1491 * } 1492 * } 1493 * </pre> 1494 * setFieldsOn() may override the value of any field in the class based 1495 * on internal properties that are fixed at boot time. 1496 * <p> 1497 * These properties are only set during platform debugging, and are not 1498 * meant to be used as a general-purpose properties store. 1499 * 1500 * {@hide} 1501 * 1502 * @param cl The class to (possibly) modify 1503 * @param partial If false, sets all static fields, otherwise, only set 1504 * fields with the {@link android.os.Debug.DebugProperty} 1505 * annotation 1506 * @throws IllegalArgumentException if any fields are final or non-static, 1507 * or if the type of the field does not match the type of 1508 * the internal debugging property value. 1509 */ 1510 public static void setFieldsOn(Class<?> cl, boolean partial) { 1511 if (false) { 1512 if (debugProperties != null) { 1513 /* Only look for fields declared directly by the class, 1514 * so we don't mysteriously change static fields in superclasses. 1515 */ 1516 for (Field field : cl.getDeclaredFields()) { 1517 if (!partial || field.getAnnotation(DebugProperty.class) != null) { 1518 final String propertyName = cl.getName() + "." + field.getName(); 1519 boolean isStatic = Modifier.isStatic(field.getModifiers()); 1520 boolean isFinal = Modifier.isFinal(field.getModifiers()); 1521 1522 if (!isStatic || isFinal) { 1523 throw new IllegalArgumentException(propertyName + 1524 " must be static and non-final"); 1525 } 1526 modifyFieldIfSet(field, debugProperties, propertyName); 1527 } 1528 } 1529 } 1530 } else { 1531 Log.wtf(TAG, 1532 "setFieldsOn(" + (cl == null ? "null" : cl.getName()) + 1533 ") called in non-DEBUG build"); 1534 } 1535 } 1536 1537 /** 1538 * Annotation to put on fields you want to set with 1539 * {@link Debug#setFieldsOn(Class, boolean)}. 1540 * 1541 * @hide 1542 */ 1543 @Target({ ElementType.FIELD }) 1544 @Retention(RetentionPolicy.RUNTIME) 1545 public @interface DebugProperty { 1546 } 1547 1548 /** 1549 * Get a debugging dump of a system service by name. 1550 * 1551 * <p>Most services require the caller to hold android.permission.DUMP. 1552 * 1553 * @param name of the service to dump 1554 * @param fd to write dump output to (usually an output log file) 1555 * @param args to pass to the service's dump method, may be null 1556 * @return true if the service was dumped successfully, false if 1557 * the service could not be found or had an error while dumping 1558 */ 1559 public static boolean dumpService(String name, FileDescriptor fd, String[] args) { 1560 IBinder service = ServiceManager.getService(name); 1561 if (service == null) { 1562 Log.e(TAG, "Can't find service to dump: " + name); 1563 return false; 1564 } 1565 1566 try { 1567 service.dump(fd, args); 1568 return true; 1569 } catch (RemoteException e) { 1570 Log.e(TAG, "Can't dump service: " + name, e); 1571 return false; 1572 } 1573 } 1574 1575 /** 1576 * Have the stack traces of the given native process dumped to the 1577 * specified file. Will be appended to the file. 1578 * @hide 1579 */ 1580 public static native void dumpNativeBacktraceToFile(int pid, String file); 1581 1582 /** 1583 * Return a String describing the calling method and location at a particular stack depth. 1584 * @param callStack the Thread stack 1585 * @param depth the depth of stack to return information for. 1586 * @return the String describing the caller at that depth. 1587 */ 1588 private static String getCaller(StackTraceElement callStack[], int depth) { 1589 // callStack[4] is the caller of the method that called getCallers() 1590 if (4 + depth >= callStack.length) { 1591 return "<bottom of call stack>"; 1592 } 1593 StackTraceElement caller = callStack[4 + depth]; 1594 return caller.getClassName() + "." + caller.getMethodName() + ":" + caller.getLineNumber(); 1595 } 1596 1597 /** 1598 * Return a string consisting of methods and locations at multiple call stack levels. 1599 * @param depth the number of levels to return, starting with the immediate caller. 1600 * @return a string describing the call stack. 1601 * {@hide} 1602 */ 1603 public static String getCallers(final int depth) { 1604 final StackTraceElement[] callStack = Thread.currentThread().getStackTrace(); 1605 StringBuffer sb = new StringBuffer(); 1606 for (int i = 0; i < depth; i++) { 1607 sb.append(getCaller(callStack, i)).append(" "); 1608 } 1609 return sb.toString(); 1610 } 1611 1612 /** 1613 * Return a string consisting of methods and locations at multiple call stack levels. 1614 * @param depth the number of levels to return, starting with the immediate caller. 1615 * @return a string describing the call stack. 1616 * {@hide} 1617 */ 1618 public static String getCallers(final int start, int depth) { 1619 final StackTraceElement[] callStack = Thread.currentThread().getStackTrace(); 1620 StringBuffer sb = new StringBuffer(); 1621 depth += start; 1622 for (int i = start; i < depth; i++) { 1623 sb.append(getCaller(callStack, i)).append(" "); 1624 } 1625 return sb.toString(); 1626 } 1627 1628 /** 1629 * Like {@link #getCallers(int)}, but each location is append to the string 1630 * as a new line with <var>linePrefix</var> in front of it. 1631 * @param depth the number of levels to return, starting with the immediate caller. 1632 * @param linePrefix prefix to put in front of each location. 1633 * @return a string describing the call stack. 1634 * {@hide} 1635 */ 1636 public static String getCallers(final int depth, String linePrefix) { 1637 final StackTraceElement[] callStack = Thread.currentThread().getStackTrace(); 1638 StringBuffer sb = new StringBuffer(); 1639 for (int i = 0; i < depth; i++) { 1640 sb.append(linePrefix).append(getCaller(callStack, i)).append("\n"); 1641 } 1642 return sb.toString(); 1643 } 1644 1645 /** 1646 * @return a String describing the immediate caller of the calling method. 1647 * {@hide} 1648 */ 1649 public static String getCaller() { 1650 return getCaller(Thread.currentThread().getStackTrace(), 0); 1651 } 1652 } 1653
