android_util_Process.cpp revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
1/* //device/libs/android_runtime/android_util_Process.cpp 2** 3** Copyright 2006, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#define LOG_TAG "Process" 19 20#include <utils/Log.h> 21#include <utils/IPCThreadState.h> 22#include <utils/ProcessState.h> 23#include <utils/IServiceManager.h> 24#include <utils/String8.h> 25#include <utils/Vector.h> 26 27#include <android_runtime/AndroidRuntime.h> 28 29#include "android_util_Binder.h" 30#include "JNIHelp.h" 31 32#include <sys/errno.h> 33#include <sys/resource.h> 34#include <sys/types.h> 35#include <dirent.h> 36#include <fcntl.h> 37#include <grp.h> 38#include <pwd.h> 39#include <signal.h> 40 41/* desktop Linux needs a little help with gettid() */ 42#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS) 43#define __KERNEL__ 44# include <linux/unistd.h> 45#ifdef _syscall0 46_syscall0(pid_t,gettid) 47#else 48pid_t gettid() { return syscall(__NR_gettid);} 49#endif 50#undef __KERNEL__ 51#endif 52 53using namespace android; 54 55static void signalExceptionForPriorityError(JNIEnv* env, jobject obj, int err) 56{ 57 switch (err) { 58 case EINVAL: 59 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 60 break; 61 case ESRCH: 62 jniThrowException(env, "java/lang/IllegalArgumentException", "Given thread does not exist"); 63 break; 64 case EPERM: 65 jniThrowException(env, "java/lang/SecurityException", "No permission to modify given thread"); 66 break; 67 case EACCES: 68 jniThrowException(env, "java/lang/SecurityException", "No permission to set to given priority"); 69 break; 70 default: 71 jniThrowException(env, "java/lang/RuntimeException", "Unknown error"); 72 break; 73 } 74} 75 76static void fakeProcessEntry(void* arg) 77{ 78 String8* cls = (String8*)arg; 79 80 AndroidRuntime* jr = AndroidRuntime::getRuntime(); 81 jr->callMain(cls->string(), 0, NULL); 82 83 delete cls; 84} 85 86jint android_os_Process_myPid(JNIEnv* env, jobject clazz) 87{ 88 return getpid(); 89} 90 91jint android_os_Process_myUid(JNIEnv* env, jobject clazz) 92{ 93 return getuid(); 94} 95 96jint android_os_Process_myTid(JNIEnv* env, jobject clazz) 97{ 98#ifdef HAVE_GETTID 99 return gettid(); 100#else 101 return getpid(); 102#endif 103} 104 105jint android_os_Process_getUidForName(JNIEnv* env, jobject clazz, jstring name) 106{ 107 if (name == NULL) { 108 jniThrowException(env, "java/lang/NullPointerException", NULL); 109 return -1; 110 } 111 112 const jchar* str16 = env->GetStringCritical(name, 0); 113 String8 name8; 114 if (str16) { 115 name8 = String8(str16, env->GetStringLength(name)); 116 env->ReleaseStringCritical(name, str16); 117 } 118 119 const size_t N = name8.size(); 120 if (N > 0) { 121 const char* str = name8.string(); 122 for (size_t i=0; i<N; i++) { 123 if (str[i] < '0' || str[i] > '9') { 124 struct passwd* pwd = getpwnam(str); 125 if (pwd == NULL) { 126 return -1; 127 } 128 return pwd->pw_uid; 129 } 130 } 131 return atoi(str); 132 } 133 return -1; 134} 135 136jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name) 137{ 138 if (name == NULL) { 139 jniThrowException(env, "java/lang/NullPointerException", NULL); 140 return -1; 141 } 142 143 const jchar* str16 = env->GetStringCritical(name, 0); 144 String8 name8; 145 if (str16) { 146 name8 = String8(str16, env->GetStringLength(name)); 147 env->ReleaseStringCritical(name, str16); 148 } 149 150 const size_t N = name8.size(); 151 if (N > 0) { 152 const char* str = name8.string(); 153 for (size_t i=0; i<N; i++) { 154 if (str[i] < '0' || str[i] > '9') { 155 struct group* grp = getgrnam(str); 156 if (grp == NULL) { 157 return -1; 158 } 159 return grp->gr_gid; 160 } 161 } 162 return atoi(str); 163 } 164 return -1; 165} 166 167void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz, 168 jint pid, jint pri) 169{ 170 if (setpriority(PRIO_PROCESS, pid, pri) < 0) { 171 signalExceptionForPriorityError(env, clazz, errno); 172 } 173 //LOGI("Setting priority of %d: %d, getpriority returns %d\n", 174 // pid, pri, getpriority(PRIO_PROCESS, pid)); 175} 176 177void android_os_Process_setCallingThreadPriority(JNIEnv* env, jobject clazz, 178 jint pri) 179{ 180 jint tid = android_os_Process_myTid(env, clazz); 181 android_os_Process_setThreadPriority(env, clazz, tid, pri); 182} 183 184jint android_os_Process_getThreadPriority(JNIEnv* env, jobject clazz, 185 jint pid) 186{ 187 errno = 0; 188 jint pri = getpriority(PRIO_PROCESS, pid); 189 if (errno != 0) { 190 signalExceptionForPriorityError(env, clazz, errno); 191 } 192 //LOGI("Returning priority of %d: %d\n", pid, pri); 193 return pri; 194} 195 196jboolean android_os_Process_setOomAdj(JNIEnv* env, jobject clazz, 197 jint pid, jint adj) 198{ 199#ifdef HAVE_OOM_ADJ 200 if (ProcessState::self()->supportsProcesses()) { 201 char text[64]; 202 sprintf(text, "/proc/%d/oom_adj", pid); 203 int fd = open(text, O_WRONLY); 204 if (fd >= 0) { 205 sprintf(text, "%d", adj); 206 write(fd, text, strlen(text)); 207 close(fd); 208 return true; 209 } 210 } 211#endif 212 return false; 213} 214 215void android_os_Process_setArgV0(JNIEnv* env, jobject clazz, jstring name) 216{ 217 if (name == NULL) { 218 jniThrowException(env, "java/lang/NullPointerException", NULL); 219 return; 220 } 221 222 const jchar* str = env->GetStringCritical(name, 0); 223 String8 name8; 224 if (str) { 225 name8 = String8(str, env->GetStringLength(name)); 226 env->ReleaseStringCritical(name, str); 227 } 228 229 if (name8.size() > 0) { 230 ProcessState::self()->setArgV0(name8.string()); 231 } 232} 233 234jint android_os_Process_setUid(JNIEnv* env, jobject clazz, jint uid) 235{ 236 #if HAVE_ANDROID_OS 237 return setuid(uid) == 0 ? 0 : errno; 238 #else 239 return ENOSYS; 240 #endif 241} 242 243jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint uid) 244{ 245 #if HAVE_ANDROID_OS 246 return setgid(uid) == 0 ? 0 : errno; 247 #else 248 return ENOSYS; 249 #endif 250} 251 252jboolean android_os_Process_supportsProcesses(JNIEnv* env, jobject clazz) 253{ 254 return ProcessState::self()->supportsProcesses(); 255} 256 257static int pid_compare(const void* v1, const void* v2) 258{ 259 //LOGI("Compare %d vs %d\n", *((const jint*)v1), *((const jint*)v2)); 260 return *((const jint*)v1) - *((const jint*)v2); 261} 262 263jint android_os_Process_getFreeMemory(JNIEnv* env, jobject clazz) 264{ 265 int fd = open("/proc/meminfo", O_RDONLY); 266 267 if (fd < 0) { 268 LOGW("Unable to open /proc/meminfo"); 269 return -1; 270 } 271 272 char buffer[256]; 273 const int len = read(fd, buffer, sizeof(buffer)-1); 274 close(fd); 275 276 if (len < 0) { 277 LOGW("Unable to read /proc/meminfo"); 278 return -1; 279 } 280 buffer[len] = 0; 281 282 int numFound = 0; 283 int mem = 0; 284 285 static const char* const sums[] = { "MemFree:", "Cached:", NULL }; 286 static const int sumsLen[] = { strlen("MemFree:"), strlen("Cached:"), NULL }; 287 288 char* p = buffer; 289 while (*p && numFound < 2) { 290 int i = 0; 291 while (sums[i]) { 292 if (strncmp(p, sums[i], sumsLen[i]) == 0) { 293 p += sumsLen[i]; 294 while (*p == ' ') p++; 295 char* num = p; 296 while (*p >= '0' && *p <= '9') p++; 297 if (*p != 0) { 298 *p = 0; 299 p++; 300 if (*p == 0) p--; 301 } 302 mem += atoi(num) * 1024; 303 numFound++; 304 break; 305 } 306 i++; 307 } 308 p++; 309 } 310 311 return numFound > 0 ? mem : -1; 312} 313 314void android_os_Process_readProcLines(JNIEnv* env, jobject clazz, jstring fileStr, 315 jobjectArray reqFields, jlongArray outFields) 316{ 317 //LOGI("getMemInfo: %p %p", reqFields, outFields); 318 319 if (fileStr == NULL || reqFields == NULL || outFields == NULL) { 320 jniThrowException(env, "java/lang/NullPointerException", NULL); 321 return; 322 } 323 324 const char* file8 = env->GetStringUTFChars(fileStr, NULL); 325 if (file8 == NULL) { 326 return; 327 } 328 String8 file(file8); 329 env->ReleaseStringUTFChars(fileStr, file8); 330 331 jsize count = env->GetArrayLength(reqFields); 332 if (count > env->GetArrayLength(outFields)) { 333 jniThrowException(env, "java/lang/IllegalArgumentException", "Array lengths differ"); 334 return; 335 } 336 337 Vector<String8> fields; 338 int i; 339 340 for (i=0; i<count; i++) { 341 jobject obj = env->GetObjectArrayElement(reqFields, i); 342 if (obj != NULL) { 343 const char* str8 = env->GetStringUTFChars((jstring)obj, NULL); 344 //LOGI("String at %d: %p = %s", i, obj, str8); 345 if (str8 == NULL) { 346 jniThrowException(env, "java/lang/NullPointerException", "Element in reqFields"); 347 return; 348 } 349 fields.add(String8(str8)); 350 env->ReleaseStringUTFChars((jstring)obj, str8); 351 } else { 352 jniThrowException(env, "java/lang/NullPointerException", "Element in reqFields"); 353 return; 354 } 355 } 356 357 jlong* sizesArray = env->GetLongArrayElements(outFields, 0); 358 if (sizesArray == NULL) { 359 return; 360 } 361 362 //LOGI("Clearing %d sizes", count); 363 for (i=0; i<count; i++) { 364 sizesArray[i] = 0; 365 } 366 367 int fd = open(file.string(), O_RDONLY); 368 369 if (fd >= 0) { 370 const size_t BUFFER_SIZE = 2048; 371 char* buffer = (char*)malloc(BUFFER_SIZE); 372 int len = read(fd, buffer, BUFFER_SIZE-1); 373 close(fd); 374 375 if (len < 0) { 376 LOGW("Unable to read %s", file.string()); 377 len = 0; 378 } 379 buffer[len] = 0; 380 381 int foundCount = 0; 382 383 char* p = buffer; 384 while (*p && foundCount < count) { 385 bool skipToEol = true; 386 //LOGI("Parsing at: %s", p); 387 for (i=0; i<count; i++) { 388 const String8& field = fields[i]; 389 if (strncmp(p, field.string(), field.length()) == 0) { 390 p += field.length(); 391 while (*p == ' ') p++; 392 char* num = p; 393 while (*p >= '0' && *p <= '9') p++; 394 skipToEol = *p != '\n'; 395 if (*p != 0) { 396 *p = 0; 397 p++; 398 } 399 char* end; 400 sizesArray[i] = strtoll(num, &end, 10); 401 //LOGI("Field %s = %d", field.string(), sizesArray[i]); 402 foundCount++; 403 break; 404 } 405 } 406 if (skipToEol) { 407 while (*p && *p != '\n') { 408 p++; 409 } 410 if (*p == '\n') { 411 p++; 412 } 413 } 414 } 415 416 free(buffer); 417 } else { 418 LOGW("Unable to open %s", file.string()); 419 } 420 421 //LOGI("Done!"); 422 env->ReleaseLongArrayElements(outFields, sizesArray, 0); 423} 424 425jintArray android_os_Process_getPids(JNIEnv* env, jobject clazz, 426 jstring file, jintArray lastArray) 427{ 428 if (file == NULL) { 429 jniThrowException(env, "java/lang/NullPointerException", NULL); 430 return NULL; 431 } 432 433 const char* file8 = env->GetStringUTFChars(file, NULL); 434 if (file8 == NULL) { 435 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 436 return NULL; 437 } 438 439 DIR* dirp = opendir(file8); 440 441 env->ReleaseStringUTFChars(file, file8); 442 443 if(dirp == NULL) { 444 return NULL; 445 } 446 447 jsize curCount = 0; 448 jint* curData = NULL; 449 if (lastArray != NULL) { 450 curCount = env->GetArrayLength(lastArray); 451 curData = env->GetIntArrayElements(lastArray, 0); 452 } 453 454 jint curPos = 0; 455 456 struct dirent* entry; 457 while ((entry=readdir(dirp)) != NULL) { 458 const char* p = entry->d_name; 459 while (*p) { 460 if (*p < '0' || *p > '9') break; 461 p++; 462 } 463 if (*p != 0) continue; 464 465 char* end; 466 int pid = strtol(entry->d_name, &end, 10); 467 //LOGI("File %s pid=%d\n", entry->d_name, pid); 468 if (curPos >= curCount) { 469 jsize newCount = (curCount == 0) ? 10 : (curCount*2); 470 jintArray newArray = env->NewIntArray(newCount); 471 if (newArray == NULL) { 472 closedir(dirp); 473 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 474 return NULL; 475 } 476 jint* newData = env->GetIntArrayElements(newArray, 0); 477 if (curData != NULL) { 478 memcpy(newData, curData, sizeof(jint)*curCount); 479 env->ReleaseIntArrayElements(lastArray, curData, 0); 480 } 481 lastArray = newArray; 482 curCount = newCount; 483 curData = newData; 484 } 485 486 curData[curPos] = pid; 487 curPos++; 488 } 489 490 closedir(dirp); 491 492 if (curData != NULL && curPos > 0) { 493 qsort(curData, curPos, sizeof(jint), pid_compare); 494 } 495 496 while (curPos < curCount) { 497 curData[curPos] = -1; 498 curPos++; 499 } 500 501 if (curData != NULL) { 502 env->ReleaseIntArrayElements(lastArray, curData, 0); 503 } 504 505 return lastArray; 506} 507 508enum { 509 PROC_TERM_MASK = 0xff, 510 PROC_ZERO_TERM = 0, 511 PROC_SPACE_TERM = ' ', 512 PROC_COMBINE = 0x100, 513 PROC_PARENS = 0x200, 514 PROC_OUT_STRING = 0x1000, 515 PROC_OUT_LONG = 0x2000, 516 PROC_OUT_FLOAT = 0x4000, 517}; 518 519jboolean android_os_Process_readProcFile(JNIEnv* env, jobject clazz, 520 jstring file, jintArray format, jobjectArray outStrings, 521 jlongArray outLongs, jfloatArray outFloats) 522{ 523 if (file == NULL || format == NULL) { 524 jniThrowException(env, "java/lang/NullPointerException", NULL); 525 return JNI_FALSE; 526 } 527 528 const char* file8 = env->GetStringUTFChars(file, NULL); 529 if (file8 == NULL) { 530 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 531 return JNI_FALSE; 532 } 533 int fd = open(file8, O_RDONLY); 534 env->ReleaseStringUTFChars(file, file8); 535 536 if (fd < 0) { 537 //LOGW("Unable to open process file: %s\n", file8); 538 return JNI_FALSE; 539 } 540 541 char buffer[256]; 542 const int len = read(fd, buffer, sizeof(buffer)-1); 543 close(fd); 544 545 if (len < 0) { 546 //LOGW("Unable to open process file: %s fd=%d\n", file8, fd); 547 return JNI_FALSE; 548 } 549 buffer[len] = 0; 550 551 //LOGI("Process file %s: %s\n", file8, buffer); 552 553 const jsize NF = env->GetArrayLength(format); 554 const jsize NS = outStrings ? env->GetArrayLength(outStrings) : 0; 555 const jsize NL = outLongs ? env->GetArrayLength(outLongs) : 0; 556 const jsize NR = outFloats ? env->GetArrayLength(outFloats) : 0; 557 558 jint* formatData = env->GetIntArrayElements(format, 0); 559 jlong* longsData = outLongs ? 560 env->GetLongArrayElements(outLongs, 0) : NULL; 561 jfloat* floatsData = outFloats ? 562 env->GetFloatArrayElements(outFloats, 0) : NULL; 563 if (formatData == NULL || (NL > 0 && longsData == NULL) 564 || (NR > 0 && floatsData == NULL)) { 565 if (formatData != NULL) { 566 env->ReleaseIntArrayElements(format, formatData, 0); 567 } 568 if (longsData != NULL) { 569 env->ReleaseLongArrayElements(outLongs, longsData, 0); 570 } 571 if (floatsData != NULL) { 572 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 573 } 574 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 575 return JNI_FALSE; 576 } 577 578 jsize i = 0; 579 jsize di = 0; 580 581 jboolean res = JNI_TRUE; 582 583 for (jsize fi=0; fi<NF; fi++) { 584 const jint mode = formatData[fi]; 585 if ((mode&PROC_PARENS) != 0) { 586 i++; 587 } 588 const char term = (char)(mode&PROC_TERM_MASK); 589 const jsize start = i; 590 if (i >= len) { 591 res = JNI_FALSE; 592 break; 593 } 594 595 jsize end = -1; 596 if ((mode&PROC_PARENS) != 0) { 597 while (buffer[i] != ')' && i < len) { 598 i++; 599 } 600 end = i; 601 i++; 602 } 603 while (buffer[i] != term && i < len) { 604 i++; 605 } 606 if (end < 0) { 607 end = i; 608 } 609 610 if (i < len) { 611 i++; 612 if ((mode&PROC_COMBINE) != 0) { 613 while (buffer[i] == term && i < len) { 614 i++; 615 } 616 } 617 } 618 619 //LOGI("Field %d: %d-%d dest=%d mode=0x%x\n", i, start, end, di, mode); 620 621 if ((mode&(PROC_OUT_FLOAT|PROC_OUT_LONG|PROC_OUT_STRING)) != 0) { 622 char c = buffer[end]; 623 buffer[end] = 0; 624 if ((mode&PROC_OUT_FLOAT) != 0 && di < NR) { 625 char* end; 626 floatsData[di] = strtof(buffer+start, &end); 627 } 628 if ((mode&PROC_OUT_LONG) != 0 && di < NL) { 629 char* end; 630 longsData[di] = strtoll(buffer+start, &end, 10); 631 } 632 if ((mode&PROC_OUT_STRING) != 0 && di < NS) { 633 jstring str = env->NewStringUTF(buffer+start); 634 env->SetObjectArrayElement(outStrings, di, str); 635 } 636 buffer[end] = c; 637 di++; 638 } 639 } 640 641 env->ReleaseIntArrayElements(format, formatData, 0); 642 if (longsData != NULL) { 643 env->ReleaseLongArrayElements(outLongs, longsData, 0); 644 } 645 if (floatsData != NULL) { 646 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 647 } 648 649 return res; 650} 651 652void android_os_Process_setApplicationObject(JNIEnv* env, jobject clazz, 653 jobject binderObject) 654{ 655 if (binderObject == NULL) { 656 jniThrowException(env, "java/lang/NullPointerException", NULL); 657 return; 658 } 659 660 sp<IBinder> binder = ibinderForJavaObject(env, binderObject); 661} 662 663void android_os_Process_sendSignal(JNIEnv* env, jobject clazz, jint pid, jint sig) 664{ 665 if (pid > 0) { 666 LOGI("Sending signal. PID: %d SIG: %d", pid, sig); 667 kill(pid, sig); 668 } 669} 670 671static jlong android_os_Process_getElapsedCpuTime(JNIEnv* env, jobject clazz) 672{ 673 struct timespec ts; 674 675 int res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts); 676 677 if (res != 0) { 678 return (jlong) 0; 679 } 680 681 nsecs_t when = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec; 682 return (jlong) nanoseconds_to_milliseconds(when); 683} 684 685static jlong android_os_Process_getPss(JNIEnv* env, jobject clazz, jint pid) 686{ 687 char filename[64]; 688 689 snprintf(filename, sizeof(filename), "/proc/%d/smaps", pid); 690 691 FILE * file = fopen(filename, "r"); 692 if (!file) { 693 return (jlong) -1; 694 } 695 696 // Tally up all of the Pss from the various maps 697 char line[256]; 698 jlong pss = 0; 699 while (fgets(line, sizeof(line), file)) { 700 jlong v; 701 if (sscanf(line, "Pss: %lld kB", &v) == 1) { 702 pss += v; 703 } 704 } 705 706 fclose(file); 707 708 // Return the Pss value in bytes, not kilobytes 709 return pss * 1024; 710} 711 712static const JNINativeMethod methods[] = { 713 {"myPid", "()I", (void*)android_os_Process_myPid}, 714 {"myTid", "()I", (void*)android_os_Process_myTid}, 715 {"myUid", "()I", (void*)android_os_Process_myUid}, 716 {"getUidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getUidForName}, 717 {"getGidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getGidForName}, 718 {"setThreadPriority", "(II)V", (void*)android_os_Process_setThreadPriority}, 719 {"setThreadPriority", "(I)V", (void*)android_os_Process_setCallingThreadPriority}, 720 {"getThreadPriority", "(I)I", (void*)android_os_Process_getThreadPriority}, 721 {"setOomAdj", "(II)Z", (void*)android_os_Process_setOomAdj}, 722 {"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0}, 723 {"setUid", "(I)I", (void*)android_os_Process_setUid}, 724 {"setGid", "(I)I", (void*)android_os_Process_setGid}, 725 {"sendSignal", "(II)V", (void*)android_os_Process_sendSignal}, 726 {"supportsProcesses", "()Z", (void*)android_os_Process_supportsProcesses}, 727 {"getFreeMemory", "()I", (void*)android_os_Process_getFreeMemory}, 728 {"readProcLines", "(Ljava/lang/String;[Ljava/lang/String;[J)V", (void*)android_os_Process_readProcLines}, 729 {"getPids", "(Ljava/lang/String;[I)[I", (void*)android_os_Process_getPids}, 730 {"readProcFile", "(Ljava/lang/String;[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_readProcFile}, 731 {"getElapsedCpuTime", "()J", (void*)android_os_Process_getElapsedCpuTime}, 732 {"getPss", "(I)J", (void*)android_os_Process_getPss}, 733 //{"setApplicationObject", "(Landroid/os/IBinder;)V", (void*)android_os_Process_setApplicationObject}, 734}; 735 736const char* const kProcessPathName = "android/os/Process"; 737 738int register_android_os_Process(JNIEnv* env) 739{ 740 jclass clazz; 741 742 clazz = env->FindClass(kProcessPathName); 743 LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.Process"); 744 745 return AndroidRuntime::registerNativeMethods( 746 env, kProcessPathName, 747 methods, NELEM(methods)); 748} 749 750