android_util_Process.cpp revision 242d65bf9faf1d2bc3468490e510551140e23462
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 <binder/IPCThreadState.h> 22#include <binder/ProcessState.h> 23#include <binder/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 <cutils/sched_policy.h> 36#include <dirent.h> 37#include <fcntl.h> 38#include <grp.h> 39#include <pwd.h> 40#include <signal.h> 41 42/* desktop Linux needs a little help with gettid() */ 43#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS) 44#define __KERNEL__ 45# include <linux/unistd.h> 46#ifdef _syscall0 47_syscall0(pid_t,gettid) 48#else 49pid_t gettid() { return syscall(__NR_gettid);} 50#endif 51#undef __KERNEL__ 52#endif 53 54using namespace android; 55 56static void signalExceptionForPriorityError(JNIEnv* env, jobject obj, int err) 57{ 58 switch (err) { 59 case EINVAL: 60 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 61 break; 62 case ESRCH: 63 jniThrowException(env, "java/lang/IllegalArgumentException", "Given thread does not exist"); 64 break; 65 case EPERM: 66 jniThrowException(env, "java/lang/SecurityException", "No permission to modify given thread"); 67 break; 68 case EACCES: 69 jniThrowException(env, "java/lang/SecurityException", "No permission to set to given priority"); 70 break; 71 default: 72 jniThrowException(env, "java/lang/RuntimeException", "Unknown error"); 73 break; 74 } 75} 76 77static void signalExceptionForGroupError(JNIEnv* env, jobject obj, int err) 78{ 79 switch (err) { 80 case EINVAL: 81 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 82 break; 83 case ESRCH: 84 jniThrowException(env, "java/lang/IllegalArgumentException", "Given thread does not exist"); 85 break; 86 case EPERM: 87 jniThrowException(env, "java/lang/SecurityException", "No permission to modify given thread"); 88 break; 89 case EACCES: 90 jniThrowException(env, "java/lang/SecurityException", "No permission to set to given group"); 91 break; 92 default: 93 jniThrowException(env, "java/lang/RuntimeException", "Unknown error"); 94 break; 95 } 96} 97 98 99static void fakeProcessEntry(void* arg) 100{ 101 String8* cls = (String8*)arg; 102 103 AndroidRuntime* jr = AndroidRuntime::getRuntime(); 104 jr->callMain(cls->string(), 0, NULL); 105 106 delete cls; 107} 108 109jint android_os_Process_myPid(JNIEnv* env, jobject clazz) 110{ 111 return getpid(); 112} 113 114jint android_os_Process_myUid(JNIEnv* env, jobject clazz) 115{ 116 return getuid(); 117} 118 119jint android_os_Process_myTid(JNIEnv* env, jobject clazz) 120{ 121#ifdef HAVE_GETTID 122 return gettid(); 123#else 124 return getpid(); 125#endif 126} 127 128jint android_os_Process_getUidForName(JNIEnv* env, jobject clazz, jstring name) 129{ 130 if (name == NULL) { 131 jniThrowException(env, "java/lang/NullPointerException", NULL); 132 return -1; 133 } 134 135 const jchar* str16 = env->GetStringCritical(name, 0); 136 String8 name8; 137 if (str16) { 138 name8 = String8(str16, env->GetStringLength(name)); 139 env->ReleaseStringCritical(name, str16); 140 } 141 142 const size_t N = name8.size(); 143 if (N > 0) { 144 const char* str = name8.string(); 145 for (size_t i=0; i<N; i++) { 146 if (str[i] < '0' || str[i] > '9') { 147 struct passwd* pwd = getpwnam(str); 148 if (pwd == NULL) { 149 return -1; 150 } 151 return pwd->pw_uid; 152 } 153 } 154 return atoi(str); 155 } 156 return -1; 157} 158 159jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name) 160{ 161 if (name == NULL) { 162 jniThrowException(env, "java/lang/NullPointerException", NULL); 163 return -1; 164 } 165 166 const jchar* str16 = env->GetStringCritical(name, 0); 167 String8 name8; 168 if (str16) { 169 name8 = String8(str16, env->GetStringLength(name)); 170 env->ReleaseStringCritical(name, str16); 171 } 172 173 const size_t N = name8.size(); 174 if (N > 0) { 175 const char* str = name8.string(); 176 for (size_t i=0; i<N; i++) { 177 if (str[i] < '0' || str[i] > '9') { 178 struct group* grp = getgrnam(str); 179 if (grp == NULL) { 180 return -1; 181 } 182 return grp->gr_gid; 183 } 184 } 185 return atoi(str); 186 } 187 return -1; 188} 189 190void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int pid, jint grp) 191{ 192 if (grp > ANDROID_TGROUP_MAX || grp < 0) { 193 signalExceptionForGroupError(env, clazz, EINVAL); 194 return; 195 } 196 197 if (set_sched_policy(pid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? 198 SP_BACKGROUND : SP_FOREGROUND)) { 199 signalExceptionForGroupError(env, clazz, errno); 200 } 201} 202 203void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp) 204{ 205 DIR *d; 206 FILE *fp; 207 char proc_path[255]; 208 struct dirent *de; 209 210 if (grp > ANDROID_TGROUP_MAX || grp < 0) { 211 signalExceptionForGroupError(env, clazz, EINVAL); 212 return; 213 } 214 215 sprintf(proc_path, "/proc/%d/task", pid); 216 if (!(d = opendir(proc_path))) { 217 // If the process exited on us, don't generate an exception 218 if (errno != ENOENT) 219 signalExceptionForGroupError(env, clazz, errno); 220 return; 221 } 222 223 while ((de = readdir(d))) { 224 int t_pid; 225 int t_pri; 226 227 if (de->d_name[0] == '.') 228 continue; 229 t_pid = atoi(de->d_name); 230 231 if (!t_pid) { 232 LOGE("Error getting pid for '%s'\n", de->d_name); 233 continue; 234 } 235 236 t_pri = getpriority(PRIO_PROCESS, t_pid); 237 238 if (grp == ANDROID_TGROUP_DEFAULT && 239 t_pri >= ANDROID_PRIORITY_BACKGROUND) { 240 // This task wants to stay at background 241 continue; 242 } 243 244 if (set_sched_policy(t_pid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? 245 SP_BACKGROUND : SP_FOREGROUND)) { 246 signalExceptionForGroupError(env, clazz, errno); 247 } 248 } 249 closedir(d); 250} 251 252void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz, 253 jint pid, jint pri) 254{ 255 int rc = 0; 256 257 if (pri >= ANDROID_PRIORITY_BACKGROUND) { 258 rc = set_sched_policy(pid, SP_BACKGROUND); 259 } else if (getpriority(PRIO_PROCESS, pid) >= ANDROID_PRIORITY_BACKGROUND) { 260 rc = set_sched_policy(pid, SP_FOREGROUND); 261 } 262 263 if (rc) { 264 signalExceptionForGroupError(env, clazz, errno); 265 } 266 267 if (setpriority(PRIO_PROCESS, pid, pri) < 0) { 268 signalExceptionForPriorityError(env, clazz, errno); 269 } 270 //LOGI("Setting priority of %d: %d, getpriority returns %d\n", 271 // pid, pri, getpriority(PRIO_PROCESS, pid)); 272} 273 274void android_os_Process_setCallingThreadPriority(JNIEnv* env, jobject clazz, 275 jint pri) 276{ 277 jint tid = android_os_Process_myTid(env, clazz); 278 android_os_Process_setThreadPriority(env, clazz, tid, pri); 279} 280 281jint android_os_Process_getThreadPriority(JNIEnv* env, jobject clazz, 282 jint pid) 283{ 284 errno = 0; 285 jint pri = getpriority(PRIO_PROCESS, pid); 286 if (errno != 0) { 287 signalExceptionForPriorityError(env, clazz, errno); 288 } 289 //LOGI("Returning priority of %d: %d\n", pid, pri); 290 return pri; 291} 292 293jboolean android_os_Process_setOomAdj(JNIEnv* env, jobject clazz, 294 jint pid, jint adj) 295{ 296#ifdef HAVE_OOM_ADJ 297 if (ProcessState::self()->supportsProcesses()) { 298 char text[64]; 299 sprintf(text, "/proc/%d/oom_adj", pid); 300 int fd = open(text, O_WRONLY); 301 if (fd >= 0) { 302 sprintf(text, "%d", adj); 303 write(fd, text, strlen(text)); 304 close(fd); 305 return true; 306 } 307 } 308#endif 309 return false; 310} 311 312void android_os_Process_setArgV0(JNIEnv* env, jobject clazz, jstring name) 313{ 314 if (name == NULL) { 315 jniThrowException(env, "java/lang/NullPointerException", NULL); 316 return; 317 } 318 319 const jchar* str = env->GetStringCritical(name, 0); 320 String8 name8; 321 if (str) { 322 name8 = String8(str, env->GetStringLength(name)); 323 env->ReleaseStringCritical(name, str); 324 } 325 326 if (name8.size() > 0) { 327 ProcessState::self()->setArgV0(name8.string()); 328 } 329} 330 331jint android_os_Process_setUid(JNIEnv* env, jobject clazz, jint uid) 332{ 333 #if HAVE_ANDROID_OS 334 return setuid(uid) == 0 ? 0 : errno; 335 #else 336 return ENOSYS; 337 #endif 338} 339 340jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint uid) 341{ 342 #if HAVE_ANDROID_OS 343 return setgid(uid) == 0 ? 0 : errno; 344 #else 345 return ENOSYS; 346 #endif 347} 348 349jboolean android_os_Process_supportsProcesses(JNIEnv* env, jobject clazz) 350{ 351 return ProcessState::self()->supportsProcesses(); 352} 353 354static int pid_compare(const void* v1, const void* v2) 355{ 356 //LOGI("Compare %d vs %d\n", *((const jint*)v1), *((const jint*)v2)); 357 return *((const jint*)v1) - *((const jint*)v2); 358} 359 360static jlong android_os_Process_getFreeMemory(JNIEnv* env, jobject clazz) 361{ 362 int fd = open("/proc/meminfo", O_RDONLY); 363 364 if (fd < 0) { 365 LOGW("Unable to open /proc/meminfo"); 366 return -1; 367 } 368 369 char buffer[256]; 370 const int len = read(fd, buffer, sizeof(buffer)-1); 371 close(fd); 372 373 if (len < 0) { 374 LOGW("Unable to read /proc/meminfo"); 375 return -1; 376 } 377 buffer[len] = 0; 378 379 int numFound = 0; 380 jlong mem = 0; 381 382 static const char* const sums[] = { "MemFree:", "Cached:", NULL }; 383 static const int sumsLen[] = { strlen("MemFree:"), strlen("Cached:"), NULL }; 384 385 char* p = buffer; 386 while (*p && numFound < 2) { 387 int i = 0; 388 while (sums[i]) { 389 if (strncmp(p, sums[i], sumsLen[i]) == 0) { 390 p += sumsLen[i]; 391 while (*p == ' ') p++; 392 char* num = p; 393 while (*p >= '0' && *p <= '9') p++; 394 if (*p != 0) { 395 *p = 0; 396 p++; 397 if (*p == 0) p--; 398 } 399 mem += atoll(num) * 1024; 400 numFound++; 401 break; 402 } 403 i++; 404 } 405 p++; 406 } 407 408 return numFound > 0 ? mem : -1; 409} 410 411void android_os_Process_readProcLines(JNIEnv* env, jobject clazz, jstring fileStr, 412 jobjectArray reqFields, jlongArray outFields) 413{ 414 //LOGI("getMemInfo: %p %p", reqFields, outFields); 415 416 if (fileStr == NULL || reqFields == NULL || outFields == NULL) { 417 jniThrowException(env, "java/lang/NullPointerException", NULL); 418 return; 419 } 420 421 const char* file8 = env->GetStringUTFChars(fileStr, NULL); 422 if (file8 == NULL) { 423 return; 424 } 425 String8 file(file8); 426 env->ReleaseStringUTFChars(fileStr, file8); 427 428 jsize count = env->GetArrayLength(reqFields); 429 if (count > env->GetArrayLength(outFields)) { 430 jniThrowException(env, "java/lang/IllegalArgumentException", "Array lengths differ"); 431 return; 432 } 433 434 Vector<String8> fields; 435 int i; 436 437 for (i=0; i<count; i++) { 438 jobject obj = env->GetObjectArrayElement(reqFields, i); 439 if (obj != NULL) { 440 const char* str8 = env->GetStringUTFChars((jstring)obj, NULL); 441 //LOGI("String at %d: %p = %s", i, obj, str8); 442 if (str8 == NULL) { 443 jniThrowException(env, "java/lang/NullPointerException", "Element in reqFields"); 444 return; 445 } 446 fields.add(String8(str8)); 447 env->ReleaseStringUTFChars((jstring)obj, str8); 448 } else { 449 jniThrowException(env, "java/lang/NullPointerException", "Element in reqFields"); 450 return; 451 } 452 } 453 454 jlong* sizesArray = env->GetLongArrayElements(outFields, 0); 455 if (sizesArray == NULL) { 456 return; 457 } 458 459 //LOGI("Clearing %d sizes", count); 460 for (i=0; i<count; i++) { 461 sizesArray[i] = 0; 462 } 463 464 int fd = open(file.string(), O_RDONLY); 465 466 if (fd >= 0) { 467 const size_t BUFFER_SIZE = 2048; 468 char* buffer = (char*)malloc(BUFFER_SIZE); 469 int len = read(fd, buffer, BUFFER_SIZE-1); 470 close(fd); 471 472 if (len < 0) { 473 LOGW("Unable to read %s", file.string()); 474 len = 0; 475 } 476 buffer[len] = 0; 477 478 int foundCount = 0; 479 480 char* p = buffer; 481 while (*p && foundCount < count) { 482 bool skipToEol = true; 483 //LOGI("Parsing at: %s", p); 484 for (i=0; i<count; i++) { 485 const String8& field = fields[i]; 486 if (strncmp(p, field.string(), field.length()) == 0) { 487 p += field.length(); 488 while (*p == ' ' || *p == '\t') p++; 489 char* num = p; 490 while (*p >= '0' && *p <= '9') p++; 491 skipToEol = *p != '\n'; 492 if (*p != 0) { 493 *p = 0; 494 p++; 495 } 496 char* end; 497 sizesArray[i] = strtoll(num, &end, 10); 498 //LOGI("Field %s = %d", field.string(), sizesArray[i]); 499 foundCount++; 500 break; 501 } 502 } 503 if (skipToEol) { 504 while (*p && *p != '\n') { 505 p++; 506 } 507 if (*p == '\n') { 508 p++; 509 } 510 } 511 } 512 513 free(buffer); 514 } else { 515 LOGW("Unable to open %s", file.string()); 516 } 517 518 //LOGI("Done!"); 519 env->ReleaseLongArrayElements(outFields, sizesArray, 0); 520} 521 522jintArray android_os_Process_getPids(JNIEnv* env, jobject clazz, 523 jstring file, jintArray lastArray) 524{ 525 if (file == NULL) { 526 jniThrowException(env, "java/lang/NullPointerException", NULL); 527 return NULL; 528 } 529 530 const char* file8 = env->GetStringUTFChars(file, NULL); 531 if (file8 == NULL) { 532 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 533 return NULL; 534 } 535 536 DIR* dirp = opendir(file8); 537 538 env->ReleaseStringUTFChars(file, file8); 539 540 if(dirp == NULL) { 541 return NULL; 542 } 543 544 jsize curCount = 0; 545 jint* curData = NULL; 546 if (lastArray != NULL) { 547 curCount = env->GetArrayLength(lastArray); 548 curData = env->GetIntArrayElements(lastArray, 0); 549 } 550 551 jint curPos = 0; 552 553 struct dirent* entry; 554 while ((entry=readdir(dirp)) != NULL) { 555 const char* p = entry->d_name; 556 while (*p) { 557 if (*p < '0' || *p > '9') break; 558 p++; 559 } 560 if (*p != 0) continue; 561 562 char* end; 563 int pid = strtol(entry->d_name, &end, 10); 564 //LOGI("File %s pid=%d\n", entry->d_name, pid); 565 if (curPos >= curCount) { 566 jsize newCount = (curCount == 0) ? 10 : (curCount*2); 567 jintArray newArray = env->NewIntArray(newCount); 568 if (newArray == NULL) { 569 closedir(dirp); 570 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 571 return NULL; 572 } 573 jint* newData = env->GetIntArrayElements(newArray, 0); 574 if (curData != NULL) { 575 memcpy(newData, curData, sizeof(jint)*curCount); 576 env->ReleaseIntArrayElements(lastArray, curData, 0); 577 } 578 lastArray = newArray; 579 curCount = newCount; 580 curData = newData; 581 } 582 583 curData[curPos] = pid; 584 curPos++; 585 } 586 587 closedir(dirp); 588 589 if (curData != NULL && curPos > 0) { 590 qsort(curData, curPos, sizeof(jint), pid_compare); 591 } 592 593 while (curPos < curCount) { 594 curData[curPos] = -1; 595 curPos++; 596 } 597 598 if (curData != NULL) { 599 env->ReleaseIntArrayElements(lastArray, curData, 0); 600 } 601 602 return lastArray; 603} 604 605enum { 606 PROC_TERM_MASK = 0xff, 607 PROC_ZERO_TERM = 0, 608 PROC_SPACE_TERM = ' ', 609 PROC_COMBINE = 0x100, 610 PROC_PARENS = 0x200, 611 PROC_OUT_STRING = 0x1000, 612 PROC_OUT_LONG = 0x2000, 613 PROC_OUT_FLOAT = 0x4000, 614}; 615 616jboolean android_os_Process_parseProcLineArray(JNIEnv* env, jobject clazz, 617 char* buffer, jint startIndex, jint endIndex, jintArray format, 618 jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats) 619{ 620 621 const jsize NF = env->GetArrayLength(format); 622 const jsize NS = outStrings ? env->GetArrayLength(outStrings) : 0; 623 const jsize NL = outLongs ? env->GetArrayLength(outLongs) : 0; 624 const jsize NR = outFloats ? env->GetArrayLength(outFloats) : 0; 625 626 jint* formatData = env->GetIntArrayElements(format, 0); 627 jlong* longsData = outLongs ? 628 env->GetLongArrayElements(outLongs, 0) : NULL; 629 jfloat* floatsData = outFloats ? 630 env->GetFloatArrayElements(outFloats, 0) : NULL; 631 if (formatData == NULL || (NL > 0 && longsData == NULL) 632 || (NR > 0 && floatsData == NULL)) { 633 if (formatData != NULL) { 634 env->ReleaseIntArrayElements(format, formatData, 0); 635 } 636 if (longsData != NULL) { 637 env->ReleaseLongArrayElements(outLongs, longsData, 0); 638 } 639 if (floatsData != NULL) { 640 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 641 } 642 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 643 return JNI_FALSE; 644 } 645 646 jsize i = startIndex; 647 jsize di = 0; 648 649 jboolean res = JNI_TRUE; 650 651 for (jsize fi=0; fi<NF; fi++) { 652 const jint mode = formatData[fi]; 653 if ((mode&PROC_PARENS) != 0) { 654 i++; 655 } 656 const char term = (char)(mode&PROC_TERM_MASK); 657 const jsize start = i; 658 if (i >= endIndex) { 659 res = JNI_FALSE; 660 break; 661 } 662 663 jsize end = -1; 664 if ((mode&PROC_PARENS) != 0) { 665 while (buffer[i] != ')' && i < endIndex) { 666 i++; 667 } 668 end = i; 669 i++; 670 } 671 while (buffer[i] != term && i < endIndex) { 672 i++; 673 } 674 if (end < 0) { 675 end = i; 676 } 677 678 if (i < endIndex) { 679 i++; 680 if ((mode&PROC_COMBINE) != 0) { 681 while (buffer[i] == term && i < endIndex) { 682 i++; 683 } 684 } 685 } 686 687 //LOGI("Field %d: %d-%d dest=%d mode=0x%x\n", i, start, end, di, mode); 688 689 if ((mode&(PROC_OUT_FLOAT|PROC_OUT_LONG|PROC_OUT_STRING)) != 0) { 690 char c = buffer[end]; 691 buffer[end] = 0; 692 if ((mode&PROC_OUT_FLOAT) != 0 && di < NR) { 693 char* end; 694 floatsData[di] = strtof(buffer+start, &end); 695 } 696 if ((mode&PROC_OUT_LONG) != 0 && di < NL) { 697 char* end; 698 longsData[di] = strtoll(buffer+start, &end, 10); 699 } 700 if ((mode&PROC_OUT_STRING) != 0 && di < NS) { 701 jstring str = env->NewStringUTF(buffer+start); 702 env->SetObjectArrayElement(outStrings, di, str); 703 } 704 buffer[end] = c; 705 di++; 706 } 707 } 708 709 env->ReleaseIntArrayElements(format, formatData, 0); 710 if (longsData != NULL) { 711 env->ReleaseLongArrayElements(outLongs, longsData, 0); 712 } 713 if (floatsData != NULL) { 714 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 715 } 716 717 return res; 718} 719 720jboolean android_os_Process_parseProcLine(JNIEnv* env, jobject clazz, 721 jbyteArray buffer, jint startIndex, jint endIndex, jintArray format, 722 jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats) 723{ 724 jbyte* bufferArray = env->GetByteArrayElements(buffer, NULL); 725 726 jboolean result = android_os_Process_parseProcLineArray(env, clazz, 727 (char*) bufferArray, startIndex, endIndex, format, outStrings, 728 outLongs, outFloats); 729 730 env->ReleaseByteArrayElements(buffer, bufferArray, 0); 731 732 return result; 733} 734 735jboolean android_os_Process_readProcFile(JNIEnv* env, jobject clazz, 736 jstring file, jintArray format, jobjectArray outStrings, 737 jlongArray outLongs, jfloatArray outFloats) 738{ 739 if (file == NULL || format == NULL) { 740 jniThrowException(env, "java/lang/NullPointerException", NULL); 741 return JNI_FALSE; 742 } 743 744 const char* file8 = env->GetStringUTFChars(file, NULL); 745 if (file8 == NULL) { 746 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 747 return JNI_FALSE; 748 } 749 int fd = open(file8, O_RDONLY); 750 env->ReleaseStringUTFChars(file, file8); 751 752 if (fd < 0) { 753 //LOGW("Unable to open process file: %s\n", file8); 754 return JNI_FALSE; 755 } 756 757 char buffer[256]; 758 const int len = read(fd, buffer, sizeof(buffer)-1); 759 close(fd); 760 761 if (len < 0) { 762 //LOGW("Unable to open process file: %s fd=%d\n", file8, fd); 763 return JNI_FALSE; 764 } 765 buffer[len] = 0; 766 767 return android_os_Process_parseProcLineArray(env, clazz, buffer, 0, len, 768 format, outStrings, outLongs, outFloats); 769 770} 771 772void android_os_Process_setApplicationObject(JNIEnv* env, jobject clazz, 773 jobject binderObject) 774{ 775 if (binderObject == NULL) { 776 jniThrowException(env, "java/lang/NullPointerException", NULL); 777 return; 778 } 779 780 sp<IBinder> binder = ibinderForJavaObject(env, binderObject); 781} 782 783void android_os_Process_sendSignal(JNIEnv* env, jobject clazz, jint pid, jint sig) 784{ 785 if (pid > 0) { 786 LOGI("Sending signal. PID: %d SIG: %d", pid, sig); 787 kill(pid, sig); 788 } 789} 790 791static jlong android_os_Process_getElapsedCpuTime(JNIEnv* env, jobject clazz) 792{ 793 struct timespec ts; 794 795 int res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts); 796 797 if (res != 0) { 798 return (jlong) 0; 799 } 800 801 nsecs_t when = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec; 802 return (jlong) nanoseconds_to_milliseconds(when); 803} 804 805static jlong android_os_Process_getPss(JNIEnv* env, jobject clazz, jint pid) 806{ 807 char filename[64]; 808 809 snprintf(filename, sizeof(filename), "/proc/%d/smaps", pid); 810 811 FILE * file = fopen(filename, "r"); 812 if (!file) { 813 return (jlong) -1; 814 } 815 816 // Tally up all of the Pss from the various maps 817 char line[256]; 818 jlong pss = 0; 819 while (fgets(line, sizeof(line), file)) { 820 jlong v; 821 if (sscanf(line, "Pss: %lld kB", &v) == 1) { 822 pss += v; 823 } 824 } 825 826 fclose(file); 827 828 // Return the Pss value in bytes, not kilobytes 829 return pss * 1024; 830} 831 832static const JNINativeMethod methods[] = { 833 {"myPid", "()I", (void*)android_os_Process_myPid}, 834 {"myTid", "()I", (void*)android_os_Process_myTid}, 835 {"myUid", "()I", (void*)android_os_Process_myUid}, 836 {"getUidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getUidForName}, 837 {"getGidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getGidForName}, 838 {"setThreadPriority", "(II)V", (void*)android_os_Process_setThreadPriority}, 839 {"setThreadPriority", "(I)V", (void*)android_os_Process_setCallingThreadPriority}, 840 {"getThreadPriority", "(I)I", (void*)android_os_Process_getThreadPriority}, 841 {"setThreadGroup", "(II)V", (void*)android_os_Process_setThreadGroup}, 842 {"setProcessGroup", "(II)V", (void*)android_os_Process_setProcessGroup}, 843 {"setOomAdj", "(II)Z", (void*)android_os_Process_setOomAdj}, 844 {"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0}, 845 {"setUid", "(I)I", (void*)android_os_Process_setUid}, 846 {"setGid", "(I)I", (void*)android_os_Process_setGid}, 847 {"sendSignal", "(II)V", (void*)android_os_Process_sendSignal}, 848 {"supportsProcesses", "()Z", (void*)android_os_Process_supportsProcesses}, 849 {"getFreeMemory", "()J", (void*)android_os_Process_getFreeMemory}, 850 {"readProcLines", "(Ljava/lang/String;[Ljava/lang/String;[J)V", (void*)android_os_Process_readProcLines}, 851 {"getPids", "(Ljava/lang/String;[I)[I", (void*)android_os_Process_getPids}, 852 {"readProcFile", "(Ljava/lang/String;[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_readProcFile}, 853 {"parseProcLine", "([BII[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_parseProcLine}, 854 {"getElapsedCpuTime", "()J", (void*)android_os_Process_getElapsedCpuTime}, 855 {"getPss", "(I)J", (void*)android_os_Process_getPss}, 856 //{"setApplicationObject", "(Landroid/os/IBinder;)V", (void*)android_os_Process_setApplicationObject}, 857}; 858 859const char* const kProcessPathName = "android/os/Process"; 860 861int register_android_os_Process(JNIEnv* env) 862{ 863 jclass clazz; 864 865 clazz = env->FindClass(kProcessPathName); 866 LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.Process"); 867 868 return AndroidRuntime::registerNativeMethods( 869 env, kProcessPathName, 870 methods, NELEM(methods)); 871} 872