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// To make sure cpu_set_t is included from sched.h 21#define _GNU_SOURCE 1 22#include <utils/Log.h> 23#include <binder/IPCThreadState.h> 24#include <binder/IServiceManager.h> 25#include <cutils/sched_policy.h> 26#include <utils/String8.h> 27#include <utils/Vector.h> 28#include <processgroup/processgroup.h> 29 30#include "core_jni_helpers.h" 31 32#include "android_util_Binder.h" 33#include "JNIHelp.h" 34 35#include <dirent.h> 36#include <fcntl.h> 37#include <grp.h> 38#include <inttypes.h> 39#include <pwd.h> 40#include <signal.h> 41#include <sys/errno.h> 42#include <sys/resource.h> 43#include <sys/stat.h> 44#include <sys/types.h> 45#include <unistd.h> 46 47#define GUARD_THREAD_PRIORITY 0 48 49using namespace android; 50 51static const bool kDebugPolicy = false; 52static const bool kDebugProc = false; 53 54#if GUARD_THREAD_PRIORITY 55Mutex gKeyCreateMutex; 56static pthread_key_t gBgKey = -1; 57#endif 58 59// For both of these, err should be in the errno range (positive), not a status_t (negative) 60static void signalExceptionForError(JNIEnv* env, int err, int tid) { 61 switch (err) { 62 case EINVAL: 63 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 64 "Invalid argument: %d", tid); 65 break; 66 case ESRCH: 67 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 68 "Given thread %d does not exist", tid); 69 break; 70 case EPERM: 71 jniThrowExceptionFmt(env, "java/lang/SecurityException", 72 "No permission to modify given thread %d", tid); 73 break; 74 default: 75 jniThrowException(env, "java/lang/RuntimeException", "Unknown error"); 76 break; 77 } 78} 79 80static void signalExceptionForPriorityError(JNIEnv* env, int err, int tid) { 81 switch (err) { 82 case EACCES: 83 jniThrowExceptionFmt(env, "java/lang/SecurityException", 84 "No permission to set the priority of %d", tid); 85 break; 86 default: 87 signalExceptionForError(env, err, tid); 88 break; 89 } 90 91} 92 93static void signalExceptionForGroupError(JNIEnv* env, int err, int tid) { 94 switch (err) { 95 case EACCES: 96 jniThrowExceptionFmt(env, "java/lang/SecurityException", 97 "No permission to set the group of %d", tid); 98 break; 99 default: 100 signalExceptionForError(env, err, tid); 101 break; 102 } 103} 104 105jint android_os_Process_getUidForName(JNIEnv* env, jobject clazz, jstring name) 106{ 107 if (name == NULL) { 108 jniThrowNullPointerException(env, NULL); 109 return -1; 110 } 111 112 const jchar* str16 = env->GetStringCritical(name, 0); 113 String8 name8; 114 if (str16) { 115 name8 = String8(reinterpret_cast<const char16_t*>(str16), 116 env->GetStringLength(name)); 117 env->ReleaseStringCritical(name, str16); 118 } 119 120 const size_t N = name8.size(); 121 if (N > 0) { 122 const char* str = name8.string(); 123 for (size_t i=0; i<N; i++) { 124 if (str[i] < '0' || str[i] > '9') { 125 struct passwd* pwd = getpwnam(str); 126 if (pwd == NULL) { 127 return -1; 128 } 129 return pwd->pw_uid; 130 } 131 } 132 return atoi(str); 133 } 134 return -1; 135} 136 137jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name) 138{ 139 if (name == NULL) { 140 jniThrowNullPointerException(env, NULL); 141 return -1; 142 } 143 144 const jchar* str16 = env->GetStringCritical(name, 0); 145 String8 name8; 146 if (str16) { 147 name8 = String8(reinterpret_cast<const char16_t*>(str16), 148 env->GetStringLength(name)); 149 env->ReleaseStringCritical(name, str16); 150 } 151 152 const size_t N = name8.size(); 153 if (N > 0) { 154 const char* str = name8.string(); 155 for (size_t i=0; i<N; i++) { 156 if (str[i] < '0' || str[i] > '9') { 157 struct group* grp = getgrnam(str); 158 if (grp == NULL) { 159 return -1; 160 } 161 return grp->gr_gid; 162 } 163 } 164 return atoi(str); 165 } 166 return -1; 167} 168 169void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int tid, jint grp) 170{ 171 ALOGV("%s tid=%d grp=%" PRId32, __func__, tid, grp); 172 SchedPolicy sp = (SchedPolicy) grp; 173 int res = set_sched_policy(tid, sp); 174 if (res != NO_ERROR) { 175 signalExceptionForGroupError(env, -res, tid); 176 } 177} 178 179void android_os_Process_setThreadGroupAndCpuset(JNIEnv* env, jobject clazz, int tid, jint grp) 180{ 181 ALOGV("%s tid=%d grp=%" PRId32, __func__, tid, grp); 182 SchedPolicy sp = (SchedPolicy) grp; 183 int res = set_sched_policy(tid, sp); 184 185 if (res != NO_ERROR) { 186 signalExceptionForGroupError(env, -res, tid); 187 } 188 189 res = set_cpuset_policy(tid, sp); 190 if (res != NO_ERROR) { 191 signalExceptionForGroupError(env, -res, tid); 192 } 193} 194 195void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp) 196{ 197 ALOGV("%s pid=%d grp=%" PRId32, __func__, pid, grp); 198 DIR *d; 199 char proc_path[255]; 200 struct dirent *de; 201 202 if ((grp == SP_FOREGROUND) || (grp > SP_MAX)) { 203 signalExceptionForGroupError(env, EINVAL, pid); 204 return; 205 } 206 207 bool isDefault = false; 208 if (grp < 0) { 209 grp = SP_FOREGROUND; 210 isDefault = true; 211 } 212 SchedPolicy sp = (SchedPolicy) grp; 213 214 if (kDebugPolicy) { 215 char cmdline[32]; 216 int fd; 217 218 strcpy(cmdline, "unknown"); 219 220 sprintf(proc_path, "/proc/%d/cmdline", pid); 221 fd = open(proc_path, O_RDONLY); 222 if (fd >= 0) { 223 int rc = read(fd, cmdline, sizeof(cmdline)-1); 224 cmdline[rc] = 0; 225 close(fd); 226 } 227 228 if (sp == SP_BACKGROUND) { 229 ALOGD("setProcessGroup: vvv pid %d (%s)", pid, cmdline); 230 } else { 231 ALOGD("setProcessGroup: ^^^ pid %d (%s)", pid, cmdline); 232 } 233 } 234 235 sprintf(proc_path, "/proc/%d/task", pid); 236 if (!(d = opendir(proc_path))) { 237 // If the process exited on us, don't generate an exception 238 if (errno != ENOENT) 239 signalExceptionForGroupError(env, errno, pid); 240 return; 241 } 242 243 while ((de = readdir(d))) { 244 int t_pid; 245 int t_pri; 246 247 if (de->d_name[0] == '.') 248 continue; 249 t_pid = atoi(de->d_name); 250 251 if (!t_pid) { 252 ALOGE("Error getting pid for '%s'\n", de->d_name); 253 continue; 254 } 255 256 t_pri = getpriority(PRIO_PROCESS, t_pid); 257 258 if (t_pri <= ANDROID_PRIORITY_AUDIO) { 259 int scheduler = sched_getscheduler(t_pid) & ~SCHED_RESET_ON_FORK; 260 if ((scheduler == SCHED_FIFO) || (scheduler == SCHED_RR)) { 261 // This task wants to stay in its current audio group so it can keep its budget 262 // don't update its cpuset or cgroup 263 continue; 264 } 265 } 266 267 if (isDefault) { 268 if (t_pri >= ANDROID_PRIORITY_BACKGROUND) { 269 // This task wants to stay at background 270 // update its cpuset so it doesn't only run on bg core(s) 271 if (cpusets_enabled()) { 272 int err = set_cpuset_policy(t_pid, sp); 273 if (err != NO_ERROR) { 274 signalExceptionForGroupError(env, -err, t_pid); 275 break; 276 } 277 } 278 continue; 279 } 280 } 281 int err; 282 283 if (cpusets_enabled()) { 284 // set both cpuset and cgroup for general threads 285 err = set_cpuset_policy(t_pid, sp); 286 if (err != NO_ERROR) { 287 signalExceptionForGroupError(env, -err, t_pid); 288 break; 289 } 290 } 291 292 err = set_sched_policy(t_pid, sp); 293 if (err != NO_ERROR) { 294 signalExceptionForGroupError(env, -err, t_pid); 295 break; 296 } 297 298 } 299 closedir(d); 300} 301 302jint android_os_Process_getProcessGroup(JNIEnv* env, jobject clazz, jint pid) 303{ 304 SchedPolicy sp; 305 if (get_sched_policy(pid, &sp) != 0) { 306 signalExceptionForGroupError(env, errno, pid); 307 } 308 return (int) sp; 309} 310 311/** Sample CPUset list format: 312 * 0-3,4,6-8 313 */ 314static void parse_cpuset_cpus(char *cpus, cpu_set_t *cpu_set) { 315 unsigned int start, end, matched, i; 316 char *cpu_range = strtok(cpus, ","); 317 while (cpu_range != NULL) { 318 start = end = 0; 319 matched = sscanf(cpu_range, "%u-%u", &start, &end); 320 cpu_range = strtok(NULL, ","); 321 if (start >= CPU_SETSIZE) { 322 ALOGE("parse_cpuset_cpus: ignoring CPU number larger than %d.", CPU_SETSIZE); 323 continue; 324 } else if (end >= CPU_SETSIZE) { 325 ALOGE("parse_cpuset_cpus: ignoring CPU numbers larger than %d.", CPU_SETSIZE); 326 end = CPU_SETSIZE - 1; 327 } 328 if (matched == 1) { 329 CPU_SET(start, cpu_set); 330 } else if (matched == 2) { 331 for (i = start; i <= end; i++) { 332 CPU_SET(i, cpu_set); 333 } 334 } else { 335 ALOGE("Failed to match cpus"); 336 } 337 } 338 return; 339} 340 341/** 342 * Stores the CPUs assigned to the cpuset corresponding to the 343 * SchedPolicy in the passed in cpu_set. 344 */ 345static void get_cpuset_cores_for_policy(SchedPolicy policy, cpu_set_t *cpu_set) 346{ 347 FILE *file; 348 const char *filename; 349 350 CPU_ZERO(cpu_set); 351 352 switch (policy) { 353 case SP_BACKGROUND: 354 filename = "/dev/cpuset/background/cpus"; 355 break; 356 case SP_FOREGROUND: 357 case SP_AUDIO_APP: 358 case SP_AUDIO_SYS: 359 filename = "/dev/cpuset/foreground/cpus"; 360 break; 361 case SP_TOP_APP: 362 filename = "/dev/cpuset/top-app/cpus"; 363 break; 364 default: 365 filename = NULL; 366 } 367 368 if (!filename) return; 369 370 file = fopen(filename, "re"); 371 if (file != NULL) { 372 // Parse cpus string 373 char *line = NULL; 374 size_t len = 0; 375 ssize_t num_read = getline(&line, &len, file); 376 fclose (file); 377 if (num_read > 0) { 378 parse_cpuset_cpus(line, cpu_set); 379 } else { 380 ALOGE("Failed to read %s", filename); 381 } 382 free(line); 383 } 384 return; 385} 386 387 388/** 389 * Determine CPU cores exclusively assigned to the 390 * cpuset corresponding to the SchedPolicy and store 391 * them in the passed in cpu_set_t 392 */ 393void get_exclusive_cpuset_cores(SchedPolicy policy, cpu_set_t *cpu_set) { 394 if (cpusets_enabled()) { 395 int i; 396 cpu_set_t tmp_set; 397 get_cpuset_cores_for_policy(policy, cpu_set); 398 for (i = 0; i < SP_CNT; i++) { 399 if ((SchedPolicy) i == policy) continue; 400 get_cpuset_cores_for_policy((SchedPolicy)i, &tmp_set); 401 // First get cores exclusive to one set or the other 402 CPU_XOR(&tmp_set, cpu_set, &tmp_set); 403 // Then get the ones only in cpu_set 404 CPU_AND(cpu_set, cpu_set, &tmp_set); 405 } 406 } else { 407 CPU_ZERO(cpu_set); 408 } 409 return; 410} 411 412jintArray android_os_Process_getExclusiveCores(JNIEnv* env, jobject clazz) { 413 SchedPolicy sp; 414 cpu_set_t cpu_set; 415 jintArray cpus; 416 int pid = getpid(); 417 if (get_sched_policy(pid, &sp) != 0) { 418 signalExceptionForGroupError(env, errno, pid); 419 return NULL; 420 } 421 get_exclusive_cpuset_cores(sp, &cpu_set); 422 int num_cpus = CPU_COUNT(&cpu_set); 423 cpus = env->NewIntArray(num_cpus); 424 if (cpus == NULL) { 425 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 426 return NULL; 427 } 428 429 jint* cpu_elements = env->GetIntArrayElements(cpus, 0); 430 int count = 0; 431 for (int i = 0; i < CPU_SETSIZE && count < num_cpus; i++) { 432 if (CPU_ISSET(i, &cpu_set)) { 433 cpu_elements[count++] = i; 434 } 435 } 436 437 env->ReleaseIntArrayElements(cpus, cpu_elements, 0); 438 return cpus; 439} 440 441static void android_os_Process_setCanSelfBackground(JNIEnv* env, jobject clazz, jboolean bgOk) { 442 // Establishes the calling thread as illegal to put into the background. 443 // Typically used only for the system process's main looper. 444#if GUARD_THREAD_PRIORITY 445 ALOGV("Process.setCanSelfBackground(%d) : tid=%d", bgOk, gettid()); 446 { 447 Mutex::Autolock _l(gKeyCreateMutex); 448 if (gBgKey == -1) { 449 pthread_key_create(&gBgKey, NULL); 450 } 451 } 452 453 // inverted: not-okay, we set a sentinel value 454 pthread_setspecific(gBgKey, (void*)(bgOk ? 0 : 0xbaad)); 455#endif 456} 457 458jint android_os_Process_getThreadScheduler(JNIEnv* env, jclass clazz, 459 jint tid) 460{ 461 int policy = 0; 462// linux has sched_getscheduler(), others don't. 463#if defined(__linux__) 464 errno = 0; 465 policy = sched_getscheduler(tid); 466 if (errno != 0) { 467 signalExceptionForPriorityError(env, errno, tid); 468 } 469#else 470 signalExceptionForPriorityError(env, ENOSYS, tid); 471#endif 472 return policy; 473} 474 475void android_os_Process_setThreadScheduler(JNIEnv* env, jclass clazz, 476 jint tid, jint policy, jint pri) 477{ 478// linux has sched_setscheduler(), others don't. 479#if defined(__linux__) 480 struct sched_param param; 481 param.sched_priority = pri; 482 int rc = sched_setscheduler(tid, policy, ¶m); 483 if (rc) { 484 signalExceptionForPriorityError(env, errno, tid); 485 } 486#else 487 signalExceptionForPriorityError(env, ENOSYS, tid); 488#endif 489} 490 491void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz, 492 jint pid, jint pri) 493{ 494#if GUARD_THREAD_PRIORITY 495 // if we're putting the current thread into the background, check the TLS 496 // to make sure this thread isn't guarded. If it is, raise an exception. 497 if (pri >= ANDROID_PRIORITY_BACKGROUND) { 498 if (pid == gettid()) { 499 void* bgOk = pthread_getspecific(gBgKey); 500 if (bgOk == ((void*)0xbaad)) { 501 ALOGE("Thread marked fg-only put self in background!"); 502 jniThrowException(env, "java/lang/SecurityException", "May not put this thread into background"); 503 return; 504 } 505 } 506 } 507#endif 508 509 int rc = androidSetThreadPriority(pid, pri); 510 if (rc != 0) { 511 if (rc == INVALID_OPERATION) { 512 signalExceptionForPriorityError(env, errno, pid); 513 } else { 514 signalExceptionForGroupError(env, errno, pid); 515 } 516 } 517 518 //ALOGI("Setting priority of %" PRId32 ": %" PRId32 ", getpriority returns %d\n", 519 // pid, pri, getpriority(PRIO_PROCESS, pid)); 520} 521 522void android_os_Process_setCallingThreadPriority(JNIEnv* env, jobject clazz, 523 jint pri) 524{ 525 android_os_Process_setThreadPriority(env, clazz, gettid(), pri); 526} 527 528jint android_os_Process_getThreadPriority(JNIEnv* env, jobject clazz, 529 jint pid) 530{ 531 errno = 0; 532 jint pri = getpriority(PRIO_PROCESS, pid); 533 if (errno != 0) { 534 signalExceptionForPriorityError(env, errno, pid); 535 } 536 //ALOGI("Returning priority of %" PRId32 ": %" PRId32 "\n", pid, pri); 537 return pri; 538} 539 540jboolean android_os_Process_setSwappiness(JNIEnv *env, jobject clazz, 541 jint pid, jboolean is_increased) 542{ 543 char text[64]; 544 545 if (is_increased) { 546 strcpy(text, "/sys/fs/cgroup/memory/sw/tasks"); 547 } else { 548 strcpy(text, "/sys/fs/cgroup/memory/tasks"); 549 } 550 551 struct stat st; 552 if (stat(text, &st) || !S_ISREG(st.st_mode)) { 553 return false; 554 } 555 556 int fd = open(text, O_WRONLY); 557 if (fd >= 0) { 558 sprintf(text, "%" PRId32, pid); 559 write(fd, text, strlen(text)); 560 close(fd); 561 } 562 563 return true; 564} 565 566void android_os_Process_setArgV0(JNIEnv* env, jobject clazz, jstring name) 567{ 568 if (name == NULL) { 569 jniThrowNullPointerException(env, NULL); 570 return; 571 } 572 573 const jchar* str = env->GetStringCritical(name, 0); 574 String8 name8; 575 if (str) { 576 name8 = String8(reinterpret_cast<const char16_t*>(str), 577 env->GetStringLength(name)); 578 env->ReleaseStringCritical(name, str); 579 } 580 581 if (!name8.isEmpty()) { 582 AndroidRuntime::getRuntime()->setArgv0(name8.string(), true /* setProcName */); 583 } 584} 585 586jint android_os_Process_setUid(JNIEnv* env, jobject clazz, jint uid) 587{ 588 return setuid(uid) == 0 ? 0 : errno; 589} 590 591jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint uid) 592{ 593 return setgid(uid) == 0 ? 0 : errno; 594} 595 596static int pid_compare(const void* v1, const void* v2) 597{ 598 //ALOGI("Compare %" PRId32 " vs %" PRId32 "\n", *((const jint*)v1), *((const jint*)v2)); 599 return *((const jint*)v1) - *((const jint*)v2); 600} 601 602static jlong getFreeMemoryImpl(const char* const sums[], const size_t sumsLen[], size_t num) 603{ 604 int fd = open("/proc/meminfo", O_RDONLY); 605 606 if (fd < 0) { 607 ALOGW("Unable to open /proc/meminfo"); 608 return -1; 609 } 610 611 char buffer[256]; 612 const int len = read(fd, buffer, sizeof(buffer)-1); 613 close(fd); 614 615 if (len < 0) { 616 ALOGW("Unable to read /proc/meminfo"); 617 return -1; 618 } 619 buffer[len] = 0; 620 621 size_t numFound = 0; 622 jlong mem = 0; 623 624 char* p = buffer; 625 while (*p && numFound < num) { 626 int i = 0; 627 while (sums[i]) { 628 if (strncmp(p, sums[i], sumsLen[i]) == 0) { 629 p += sumsLen[i]; 630 while (*p == ' ') p++; 631 char* num = p; 632 while (*p >= '0' && *p <= '9') p++; 633 if (*p != 0) { 634 *p = 0; 635 p++; 636 if (*p == 0) p--; 637 } 638 mem += atoll(num) * 1024; 639 numFound++; 640 break; 641 } 642 i++; 643 } 644 p++; 645 } 646 647 return numFound > 0 ? mem : -1; 648} 649 650static jlong android_os_Process_getFreeMemory(JNIEnv* env, jobject clazz) 651{ 652 static const char* const sums[] = { "MemFree:", "Cached:", NULL }; 653 static const size_t sumsLen[] = { strlen("MemFree:"), strlen("Cached:"), 0 }; 654 return getFreeMemoryImpl(sums, sumsLen, 2); 655} 656 657static jlong android_os_Process_getTotalMemory(JNIEnv* env, jobject clazz) 658{ 659 static const char* const sums[] = { "MemTotal:", NULL }; 660 static const size_t sumsLen[] = { strlen("MemTotal:"), 0 }; 661 return getFreeMemoryImpl(sums, sumsLen, 1); 662} 663 664void android_os_Process_readProcLines(JNIEnv* env, jobject clazz, jstring fileStr, 665 jobjectArray reqFields, jlongArray outFields) 666{ 667 //ALOGI("getMemInfo: %p %p", reqFields, outFields); 668 669 if (fileStr == NULL || reqFields == NULL || outFields == NULL) { 670 jniThrowNullPointerException(env, NULL); 671 return; 672 } 673 674 const char* file8 = env->GetStringUTFChars(fileStr, NULL); 675 if (file8 == NULL) { 676 return; 677 } 678 String8 file(file8); 679 env->ReleaseStringUTFChars(fileStr, file8); 680 681 jsize count = env->GetArrayLength(reqFields); 682 if (count > env->GetArrayLength(outFields)) { 683 jniThrowException(env, "java/lang/IllegalArgumentException", "Array lengths differ"); 684 return; 685 } 686 687 Vector<String8> fields; 688 int i; 689 690 for (i=0; i<count; i++) { 691 jobject obj = env->GetObjectArrayElement(reqFields, i); 692 if (obj != NULL) { 693 const char* str8 = env->GetStringUTFChars((jstring)obj, NULL); 694 //ALOGI("String at %d: %p = %s", i, obj, str8); 695 if (str8 == NULL) { 696 jniThrowNullPointerException(env, "Element in reqFields"); 697 return; 698 } 699 fields.add(String8(str8)); 700 env->ReleaseStringUTFChars((jstring)obj, str8); 701 } else { 702 jniThrowNullPointerException(env, "Element in reqFields"); 703 return; 704 } 705 } 706 707 jlong* sizesArray = env->GetLongArrayElements(outFields, 0); 708 if (sizesArray == NULL) { 709 return; 710 } 711 712 //ALOGI("Clearing %" PRId32 " sizes", count); 713 for (i=0; i<count; i++) { 714 sizesArray[i] = 0; 715 } 716 717 int fd = open(file.string(), O_RDONLY); 718 719 if (fd >= 0) { 720 const size_t BUFFER_SIZE = 2048; 721 char* buffer = (char*)malloc(BUFFER_SIZE); 722 int len = read(fd, buffer, BUFFER_SIZE-1); 723 close(fd); 724 725 if (len < 0) { 726 ALOGW("Unable to read %s", file.string()); 727 len = 0; 728 } 729 buffer[len] = 0; 730 731 int foundCount = 0; 732 733 char* p = buffer; 734 while (*p && foundCount < count) { 735 bool skipToEol = true; 736 //ALOGI("Parsing at: %s", p); 737 for (i=0; i<count; i++) { 738 const String8& field = fields[i]; 739 if (strncmp(p, field.string(), field.length()) == 0) { 740 p += field.length(); 741 while (*p == ' ' || *p == '\t') p++; 742 char* num = p; 743 while (*p >= '0' && *p <= '9') p++; 744 skipToEol = *p != '\n'; 745 if (*p != 0) { 746 *p = 0; 747 p++; 748 } 749 char* end; 750 sizesArray[i] = strtoll(num, &end, 10); 751 //ALOGI("Field %s = %" PRId64, field.string(), sizesArray[i]); 752 foundCount++; 753 break; 754 } 755 } 756 if (skipToEol) { 757 while (*p && *p != '\n') { 758 p++; 759 } 760 if (*p == '\n') { 761 p++; 762 } 763 } 764 } 765 766 free(buffer); 767 } else { 768 ALOGW("Unable to open %s", file.string()); 769 } 770 771 //ALOGI("Done!"); 772 env->ReleaseLongArrayElements(outFields, sizesArray, 0); 773} 774 775jintArray android_os_Process_getPids(JNIEnv* env, jobject clazz, 776 jstring file, jintArray lastArray) 777{ 778 if (file == NULL) { 779 jniThrowNullPointerException(env, NULL); 780 return NULL; 781 } 782 783 const char* file8 = env->GetStringUTFChars(file, NULL); 784 if (file8 == NULL) { 785 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 786 return NULL; 787 } 788 789 DIR* dirp = opendir(file8); 790 791 env->ReleaseStringUTFChars(file, file8); 792 793 if(dirp == NULL) { 794 return NULL; 795 } 796 797 jsize curCount = 0; 798 jint* curData = NULL; 799 if (lastArray != NULL) { 800 curCount = env->GetArrayLength(lastArray); 801 curData = env->GetIntArrayElements(lastArray, 0); 802 } 803 804 jint curPos = 0; 805 806 struct dirent* entry; 807 while ((entry=readdir(dirp)) != NULL) { 808 const char* p = entry->d_name; 809 while (*p) { 810 if (*p < '0' || *p > '9') break; 811 p++; 812 } 813 if (*p != 0) continue; 814 815 char* end; 816 int pid = strtol(entry->d_name, &end, 10); 817 //ALOGI("File %s pid=%d\n", entry->d_name, pid); 818 if (curPos >= curCount) { 819 jsize newCount = (curCount == 0) ? 10 : (curCount*2); 820 jintArray newArray = env->NewIntArray(newCount); 821 if (newArray == NULL) { 822 closedir(dirp); 823 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 824 return NULL; 825 } 826 jint* newData = env->GetIntArrayElements(newArray, 0); 827 if (curData != NULL) { 828 memcpy(newData, curData, sizeof(jint)*curCount); 829 env->ReleaseIntArrayElements(lastArray, curData, 0); 830 } 831 lastArray = newArray; 832 curCount = newCount; 833 curData = newData; 834 } 835 836 curData[curPos] = pid; 837 curPos++; 838 } 839 840 closedir(dirp); 841 842 if (curData != NULL && curPos > 0) { 843 qsort(curData, curPos, sizeof(jint), pid_compare); 844 } 845 846 while (curPos < curCount) { 847 curData[curPos] = -1; 848 curPos++; 849 } 850 851 if (curData != NULL) { 852 env->ReleaseIntArrayElements(lastArray, curData, 0); 853 } 854 855 return lastArray; 856} 857 858enum { 859 PROC_TERM_MASK = 0xff, 860 PROC_ZERO_TERM = 0, 861 PROC_SPACE_TERM = ' ', 862 PROC_COMBINE = 0x100, 863 PROC_PARENS = 0x200, 864 PROC_QUOTES = 0x400, 865 PROC_CHAR = 0x800, 866 PROC_OUT_STRING = 0x1000, 867 PROC_OUT_LONG = 0x2000, 868 PROC_OUT_FLOAT = 0x4000, 869}; 870 871jboolean android_os_Process_parseProcLineArray(JNIEnv* env, jobject clazz, 872 char* buffer, jint startIndex, jint endIndex, jintArray format, 873 jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats) 874{ 875 876 const jsize NF = env->GetArrayLength(format); 877 const jsize NS = outStrings ? env->GetArrayLength(outStrings) : 0; 878 const jsize NL = outLongs ? env->GetArrayLength(outLongs) : 0; 879 const jsize NR = outFloats ? env->GetArrayLength(outFloats) : 0; 880 881 jint* formatData = env->GetIntArrayElements(format, 0); 882 jlong* longsData = outLongs ? 883 env->GetLongArrayElements(outLongs, 0) : NULL; 884 jfloat* floatsData = outFloats ? 885 env->GetFloatArrayElements(outFloats, 0) : NULL; 886 if (formatData == NULL || (NL > 0 && longsData == NULL) 887 || (NR > 0 && floatsData == NULL)) { 888 if (formatData != NULL) { 889 env->ReleaseIntArrayElements(format, formatData, 0); 890 } 891 if (longsData != NULL) { 892 env->ReleaseLongArrayElements(outLongs, longsData, 0); 893 } 894 if (floatsData != NULL) { 895 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 896 } 897 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 898 return JNI_FALSE; 899 } 900 901 jsize i = startIndex; 902 jsize di = 0; 903 904 jboolean res = JNI_TRUE; 905 906 for (jsize fi=0; fi<NF; fi++) { 907 jint mode = formatData[fi]; 908 if ((mode&PROC_PARENS) != 0) { 909 i++; 910 } else if ((mode&PROC_QUOTES) != 0) { 911 if (buffer[i] == '"') { 912 i++; 913 } else { 914 mode &= ~PROC_QUOTES; 915 } 916 } 917 const char term = (char)(mode&PROC_TERM_MASK); 918 const jsize start = i; 919 if (i >= endIndex) { 920 if (kDebugProc) { 921 ALOGW("Ran off end of data @%d", i); 922 } 923 res = JNI_FALSE; 924 break; 925 } 926 927 jsize end = -1; 928 if ((mode&PROC_PARENS) != 0) { 929 while (i < endIndex && buffer[i] != ')') { 930 i++; 931 } 932 end = i; 933 i++; 934 } else if ((mode&PROC_QUOTES) != 0) { 935 while (buffer[i] != '"' && i < endIndex) { 936 i++; 937 } 938 end = i; 939 i++; 940 } 941 while (i < endIndex && buffer[i] != term) { 942 i++; 943 } 944 if (end < 0) { 945 end = i; 946 } 947 948 if (i < endIndex) { 949 i++; 950 if ((mode&PROC_COMBINE) != 0) { 951 while (i < endIndex && buffer[i] == term) { 952 i++; 953 } 954 } 955 } 956 957 //ALOGI("Field %" PRId32 ": %" PRId32 "-%" PRId32 " dest=%" PRId32 " mode=0x%" PRIx32 "\n", i, start, end, di, mode); 958 959 if ((mode&(PROC_OUT_FLOAT|PROC_OUT_LONG|PROC_OUT_STRING)) != 0) { 960 char c = buffer[end]; 961 buffer[end] = 0; 962 if ((mode&PROC_OUT_FLOAT) != 0 && di < NR) { 963 char* end; 964 floatsData[di] = strtof(buffer+start, &end); 965 } 966 if ((mode&PROC_OUT_LONG) != 0 && di < NL) { 967 if ((mode&PROC_CHAR) != 0) { 968 // Caller wants single first character returned as one long. 969 longsData[di] = buffer[start]; 970 } else { 971 char* end; 972 longsData[di] = strtoll(buffer+start, &end, 10); 973 } 974 } 975 if ((mode&PROC_OUT_STRING) != 0 && di < NS) { 976 jstring str = env->NewStringUTF(buffer+start); 977 env->SetObjectArrayElement(outStrings, di, str); 978 } 979 buffer[end] = c; 980 di++; 981 } 982 } 983 984 env->ReleaseIntArrayElements(format, formatData, 0); 985 if (longsData != NULL) { 986 env->ReleaseLongArrayElements(outLongs, longsData, 0); 987 } 988 if (floatsData != NULL) { 989 env->ReleaseFloatArrayElements(outFloats, floatsData, 0); 990 } 991 992 return res; 993} 994 995jboolean android_os_Process_parseProcLine(JNIEnv* env, jobject clazz, 996 jbyteArray buffer, jint startIndex, jint endIndex, jintArray format, 997 jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats) 998{ 999 jbyte* bufferArray = env->GetByteArrayElements(buffer, NULL); 1000 1001 jboolean result = android_os_Process_parseProcLineArray(env, clazz, 1002 (char*) bufferArray, startIndex, endIndex, format, outStrings, 1003 outLongs, outFloats); 1004 1005 env->ReleaseByteArrayElements(buffer, bufferArray, 0); 1006 1007 return result; 1008} 1009 1010jboolean android_os_Process_readProcFile(JNIEnv* env, jobject clazz, 1011 jstring file, jintArray format, jobjectArray outStrings, 1012 jlongArray outLongs, jfloatArray outFloats) 1013{ 1014 if (file == NULL || format == NULL) { 1015 jniThrowNullPointerException(env, NULL); 1016 return JNI_FALSE; 1017 } 1018 1019 const char* file8 = env->GetStringUTFChars(file, NULL); 1020 if (file8 == NULL) { 1021 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 1022 return JNI_FALSE; 1023 } 1024 int fd = open(file8, O_RDONLY); 1025 1026 if (fd < 0) { 1027 if (kDebugProc) { 1028 ALOGW("Unable to open process file: %s\n", file8); 1029 } 1030 env->ReleaseStringUTFChars(file, file8); 1031 return JNI_FALSE; 1032 } 1033 env->ReleaseStringUTFChars(file, file8); 1034 1035 char buffer[256]; 1036 const int len = read(fd, buffer, sizeof(buffer)-1); 1037 close(fd); 1038 1039 if (len < 0) { 1040 if (kDebugProc) { 1041 ALOGW("Unable to open process file: %s fd=%d\n", file8, fd); 1042 } 1043 return JNI_FALSE; 1044 } 1045 buffer[len] = 0; 1046 1047 return android_os_Process_parseProcLineArray(env, clazz, buffer, 0, len, 1048 format, outStrings, outLongs, outFloats); 1049 1050} 1051 1052void android_os_Process_setApplicationObject(JNIEnv* env, jobject clazz, 1053 jobject binderObject) 1054{ 1055 if (binderObject == NULL) { 1056 jniThrowNullPointerException(env, NULL); 1057 return; 1058 } 1059 1060 sp<IBinder> binder = ibinderForJavaObject(env, binderObject); 1061} 1062 1063void android_os_Process_sendSignal(JNIEnv* env, jobject clazz, jint pid, jint sig) 1064{ 1065 if (pid > 0) { 1066 ALOGI("Sending signal. PID: %" PRId32 " SIG: %" PRId32, pid, sig); 1067 kill(pid, sig); 1068 } 1069} 1070 1071void android_os_Process_sendSignalQuiet(JNIEnv* env, jobject clazz, jint pid, jint sig) 1072{ 1073 if (pid > 0) { 1074 kill(pid, sig); 1075 } 1076} 1077 1078static jlong android_os_Process_getElapsedCpuTime(JNIEnv* env, jobject clazz) 1079{ 1080 struct timespec ts; 1081 1082 int res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts); 1083 1084 if (res != 0) { 1085 return (jlong) 0; 1086 } 1087 1088 nsecs_t when = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec; 1089 return (jlong) nanoseconds_to_milliseconds(when); 1090} 1091 1092static jlong android_os_Process_getPss(JNIEnv* env, jobject clazz, jint pid) 1093{ 1094 char filename[64]; 1095 1096 snprintf(filename, sizeof(filename), "/proc/%" PRId32 "/smaps", pid); 1097 1098 FILE * file = fopen(filename, "r"); 1099 if (!file) { 1100 return (jlong) -1; 1101 } 1102 1103 // Tally up all of the Pss from the various maps 1104 char line[256]; 1105 jlong pss = 0; 1106 while (fgets(line, sizeof(line), file)) { 1107 jlong v; 1108 if (sscanf(line, "Pss: %" SCNd64 " kB", &v) == 1) { 1109 pss += v; 1110 } 1111 } 1112 1113 fclose(file); 1114 1115 // Return the Pss value in bytes, not kilobytes 1116 return pss * 1024; 1117} 1118 1119jintArray android_os_Process_getPidsForCommands(JNIEnv* env, jobject clazz, 1120 jobjectArray commandNames) 1121{ 1122 if (commandNames == NULL) { 1123 jniThrowNullPointerException(env, NULL); 1124 return NULL; 1125 } 1126 1127 Vector<String8> commands; 1128 1129 jsize count = env->GetArrayLength(commandNames); 1130 1131 for (int i=0; i<count; i++) { 1132 jobject obj = env->GetObjectArrayElement(commandNames, i); 1133 if (obj != NULL) { 1134 const char* str8 = env->GetStringUTFChars((jstring)obj, NULL); 1135 if (str8 == NULL) { 1136 jniThrowNullPointerException(env, "Element in commandNames"); 1137 return NULL; 1138 } 1139 commands.add(String8(str8)); 1140 env->ReleaseStringUTFChars((jstring)obj, str8); 1141 } else { 1142 jniThrowNullPointerException(env, "Element in commandNames"); 1143 return NULL; 1144 } 1145 } 1146 1147 Vector<jint> pids; 1148 1149 DIR *proc = opendir("/proc"); 1150 if (proc == NULL) { 1151 fprintf(stderr, "/proc: %s\n", strerror(errno)); 1152 return NULL; 1153 } 1154 1155 struct dirent *d; 1156 while ((d = readdir(proc))) { 1157 int pid = atoi(d->d_name); 1158 if (pid <= 0) continue; 1159 1160 char path[PATH_MAX]; 1161 char data[PATH_MAX]; 1162 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 1163 1164 int fd = open(path, O_RDONLY); 1165 if (fd < 0) { 1166 continue; 1167 } 1168 const int len = read(fd, data, sizeof(data)-1); 1169 close(fd); 1170 1171 if (len < 0) { 1172 continue; 1173 } 1174 data[len] = 0; 1175 1176 for (int i=0; i<len; i++) { 1177 if (data[i] == ' ') { 1178 data[i] = 0; 1179 break; 1180 } 1181 } 1182 1183 for (size_t i=0; i<commands.size(); i++) { 1184 if (commands[i] == data) { 1185 pids.add(pid); 1186 break; 1187 } 1188 } 1189 } 1190 1191 closedir(proc); 1192 1193 jintArray pidArray = env->NewIntArray(pids.size()); 1194 if (pidArray == NULL) { 1195 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 1196 return NULL; 1197 } 1198 1199 if (pids.size() > 0) { 1200 env->SetIntArrayRegion(pidArray, 0, pids.size(), pids.array()); 1201 } 1202 1203 return pidArray; 1204} 1205 1206jint android_os_Process_killProcessGroup(JNIEnv* env, jobject clazz, jint uid, jint pid) 1207{ 1208 return killProcessGroup(uid, pid, SIGKILL); 1209} 1210 1211void android_os_Process_removeAllProcessGroups(JNIEnv* env, jobject clazz) 1212{ 1213 return removeAllProcessGroups(); 1214} 1215 1216static const JNINativeMethod methods[] = { 1217 {"getUidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getUidForName}, 1218 {"getGidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getGidForName}, 1219 {"setThreadPriority", "(II)V", (void*)android_os_Process_setThreadPriority}, 1220 {"setThreadScheduler", "(III)V", (void*)android_os_Process_setThreadScheduler}, 1221 {"setCanSelfBackground", "(Z)V", (void*)android_os_Process_setCanSelfBackground}, 1222 {"setThreadPriority", "(I)V", (void*)android_os_Process_setCallingThreadPriority}, 1223 {"getThreadPriority", "(I)I", (void*)android_os_Process_getThreadPriority}, 1224 {"getThreadScheduler", "(I)I", (void*)android_os_Process_getThreadScheduler}, 1225 {"setThreadGroup", "(II)V", (void*)android_os_Process_setThreadGroup}, 1226 {"setThreadGroupAndCpuset", "(II)V", (void*)android_os_Process_setThreadGroupAndCpuset}, 1227 {"setProcessGroup", "(II)V", (void*)android_os_Process_setProcessGroup}, 1228 {"getProcessGroup", "(I)I", (void*)android_os_Process_getProcessGroup}, 1229 {"getExclusiveCores", "()[I", (void*)android_os_Process_getExclusiveCores}, 1230 {"setSwappiness", "(IZ)Z", (void*)android_os_Process_setSwappiness}, 1231 {"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0}, 1232 {"setUid", "(I)I", (void*)android_os_Process_setUid}, 1233 {"setGid", "(I)I", (void*)android_os_Process_setGid}, 1234 {"sendSignal", "(II)V", (void*)android_os_Process_sendSignal}, 1235 {"sendSignalQuiet", "(II)V", (void*)android_os_Process_sendSignalQuiet}, 1236 {"getFreeMemory", "()J", (void*)android_os_Process_getFreeMemory}, 1237 {"getTotalMemory", "()J", (void*)android_os_Process_getTotalMemory}, 1238 {"readProcLines", "(Ljava/lang/String;[Ljava/lang/String;[J)V", (void*)android_os_Process_readProcLines}, 1239 {"getPids", "(Ljava/lang/String;[I)[I", (void*)android_os_Process_getPids}, 1240 {"readProcFile", "(Ljava/lang/String;[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_readProcFile}, 1241 {"parseProcLine", "([BII[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_parseProcLine}, 1242 {"getElapsedCpuTime", "()J", (void*)android_os_Process_getElapsedCpuTime}, 1243 {"getPss", "(I)J", (void*)android_os_Process_getPss}, 1244 {"getPidsForCommands", "([Ljava/lang/String;)[I", (void*)android_os_Process_getPidsForCommands}, 1245 //{"setApplicationObject", "(Landroid/os/IBinder;)V", (void*)android_os_Process_setApplicationObject}, 1246 {"killProcessGroup", "(II)I", (void*)android_os_Process_killProcessGroup}, 1247 {"removeAllProcessGroups", "()V", (void*)android_os_Process_removeAllProcessGroups}, 1248}; 1249 1250int register_android_os_Process(JNIEnv* env) 1251{ 1252 return RegisterMethodsOrDie(env, "android/os/Process", methods, NELEM(methods)); 1253} 1254