/* //device/libs/android_runtime/android_util_Process.cpp
|
**
|
** Copyright 2006, The Android Open Source Project
|
**
|
** Licensed under the Apache License, Version 2.0 (the "License");
|
** you may not use this file except in compliance with the License.
|
** You may obtain a copy of the License at
|
**
|
** http://www.apache.org/licenses/LICENSE-2.0
|
**
|
** Unless required by applicable law or agreed to in writing, software
|
** distributed under the License is distributed on an "AS IS" BASIS,
|
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
** See the License for the specific language governing permissions and
|
** limitations under the License.
|
*/
|
|
#define LOG_TAG "Process"
|
|
// To make sure cpu_set_t is included from sched.h
|
#define _GNU_SOURCE 1
|
#include <utils/Log.h>
|
#include <binder/IPCThreadState.h>
|
#include <binder/IServiceManager.h>
|
#include <utils/String8.h>
|
#include <utils/Vector.h>
|
#include <meminfo/procmeminfo.h>
|
#include <meminfo/sysmeminfo.h>
|
#include <processgroup/processgroup.h>
|
#include <processgroup/sched_policy.h>
|
|
#include <string>
|
#include <vector>
|
|
#include "core_jni_helpers.h"
|
|
#include "android_util_Binder.h"
|
#include <nativehelper/JNIHelp.h>
|
#include "android_os_Debug.h"
|
|
#include <dirent.h>
|
#include <fcntl.h>
|
#include <grp.h>
|
#include <inttypes.h>
|
#include <pwd.h>
|
#include <signal.h>
|
#include <string.h>
|
#include <sys/errno.h>
|
#include <sys/resource.h>
|
#include <sys/stat.h>
|
#include <sys/sysinfo.h>
|
#include <sys/types.h>
|
#include <unistd.h>
|
|
#define GUARD_THREAD_PRIORITY 0
|
|
using namespace android;
|
|
static const bool kDebugPolicy = false;
|
static const bool kDebugProc = false;
|
// When reading `proc` files, how many bytes to read at a time
|
static const int kReadSize = 4096;
|
|
#if GUARD_THREAD_PRIORITY
|
Mutex gKeyCreateMutex;
|
static pthread_key_t gBgKey = -1;
|
#endif
|
|
// For both of these, err should be in the errno range (positive), not a status_t (negative)
|
static void signalExceptionForError(JNIEnv* env, int err, int tid) {
|
switch (err) {
|
case EINVAL:
|
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
|
"Invalid argument: %d", tid);
|
break;
|
case ESRCH:
|
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
|
"Given thread %d does not exist", tid);
|
break;
|
case EPERM:
|
jniThrowExceptionFmt(env, "java/lang/SecurityException",
|
"No permission to modify given thread %d", tid);
|
break;
|
default:
|
jniThrowException(env, "java/lang/RuntimeException", "Unknown error");
|
break;
|
}
|
}
|
|
static void signalExceptionForPriorityError(JNIEnv* env, int err, int tid) {
|
switch (err) {
|
case EACCES:
|
jniThrowExceptionFmt(env, "java/lang/SecurityException",
|
"No permission to set the priority of %d", tid);
|
break;
|
default:
|
signalExceptionForError(env, err, tid);
|
break;
|
}
|
|
}
|
|
static void signalExceptionForGroupError(JNIEnv* env, int err, int tid) {
|
switch (err) {
|
case EACCES:
|
jniThrowExceptionFmt(env, "java/lang/SecurityException",
|
"No permission to set the group of %d", tid);
|
break;
|
default:
|
signalExceptionForError(env, err, tid);
|
break;
|
}
|
}
|
|
jint android_os_Process_getUidForName(JNIEnv* env, jobject clazz, jstring name)
|
{
|
if (name == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return -1;
|
}
|
|
const jchar* str16 = env->GetStringCritical(name, 0);
|
String8 name8;
|
if (str16) {
|
name8 = String8(reinterpret_cast<const char16_t*>(str16),
|
env->GetStringLength(name));
|
env->ReleaseStringCritical(name, str16);
|
}
|
|
const size_t N = name8.size();
|
if (N > 0) {
|
const char* str = name8.string();
|
for (size_t i=0; i<N; i++) {
|
if (str[i] < '0' || str[i] > '9') {
|
struct passwd* pwd = getpwnam(str);
|
if (pwd == NULL) {
|
return -1;
|
}
|
return pwd->pw_uid;
|
}
|
}
|
return atoi(str);
|
}
|
return -1;
|
}
|
|
jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name)
|
{
|
if (name == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return -1;
|
}
|
|
const jchar* str16 = env->GetStringCritical(name, 0);
|
String8 name8;
|
if (str16) {
|
name8 = String8(reinterpret_cast<const char16_t*>(str16),
|
env->GetStringLength(name));
|
env->ReleaseStringCritical(name, str16);
|
}
|
|
const size_t N = name8.size();
|
if (N > 0) {
|
const char* str = name8.string();
|
for (size_t i=0; i<N; i++) {
|
if (str[i] < '0' || str[i] > '9') {
|
struct group* grp = getgrnam(str);
|
if (grp == NULL) {
|
return -1;
|
}
|
return grp->gr_gid;
|
}
|
}
|
return atoi(str);
|
}
|
return -1;
|
}
|
|
void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int tid, jint grp)
|
{
|
ALOGV("%s tid=%d grp=%" PRId32, __func__, tid, grp);
|
SchedPolicy sp = (SchedPolicy) grp;
|
int res = set_sched_policy(tid, sp);
|
if (res != NO_ERROR) {
|
signalExceptionForGroupError(env, -res, tid);
|
}
|
}
|
|
void android_os_Process_setThreadGroupAndCpuset(JNIEnv* env, jobject clazz, int tid, jint grp)
|
{
|
ALOGV("%s tid=%d grp=%" PRId32, __func__, tid, grp);
|
SchedPolicy sp = (SchedPolicy) grp;
|
int res = set_sched_policy(tid, sp);
|
|
if (res != NO_ERROR) {
|
signalExceptionForGroupError(env, -res, tid);
|
}
|
|
res = set_cpuset_policy(tid, sp);
|
if (res != NO_ERROR) {
|
signalExceptionForGroupError(env, -res, tid);
|
}
|
}
|
|
void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
|
{
|
ALOGV("%s pid=%d grp=%" PRId32, __func__, pid, grp);
|
DIR *d;
|
char proc_path[255];
|
struct dirent *de;
|
|
if ((grp == SP_FOREGROUND) || (grp > SP_MAX)) {
|
signalExceptionForGroupError(env, EINVAL, pid);
|
return;
|
}
|
|
bool isDefault = false;
|
if (grp < 0) {
|
grp = SP_FOREGROUND;
|
isDefault = true;
|
}
|
SchedPolicy sp = (SchedPolicy) grp;
|
|
if (kDebugPolicy) {
|
char cmdline[32];
|
int fd;
|
|
strcpy(cmdline, "unknown");
|
|
sprintf(proc_path, "/proc/%d/cmdline", pid);
|
fd = open(proc_path, O_RDONLY | O_CLOEXEC);
|
if (fd >= 0) {
|
int rc = read(fd, cmdline, sizeof(cmdline)-1);
|
cmdline[rc] = 0;
|
close(fd);
|
}
|
|
if (sp == SP_BACKGROUND) {
|
ALOGD("setProcessGroup: vvv pid %d (%s)", pid, cmdline);
|
} else {
|
ALOGD("setProcessGroup: ^^^ pid %d (%s)", pid, cmdline);
|
}
|
}
|
|
sprintf(proc_path, "/proc/%d/task", pid);
|
if (!(d = opendir(proc_path))) {
|
// If the process exited on us, don't generate an exception
|
if (errno != ENOENT)
|
signalExceptionForGroupError(env, errno, pid);
|
return;
|
}
|
|
while ((de = readdir(d))) {
|
int t_pid;
|
int t_pri;
|
|
if (de->d_name[0] == '.')
|
continue;
|
t_pid = atoi(de->d_name);
|
|
if (!t_pid) {
|
ALOGE("Error getting pid for '%s'\n", de->d_name);
|
continue;
|
}
|
|
t_pri = getpriority(PRIO_PROCESS, t_pid);
|
|
if (t_pri <= ANDROID_PRIORITY_AUDIO) {
|
int scheduler = sched_getscheduler(t_pid) & ~SCHED_RESET_ON_FORK;
|
if ((scheduler == SCHED_FIFO) || (scheduler == SCHED_RR)) {
|
// This task wants to stay in its current audio group so it can keep its budget
|
// don't update its cpuset or cgroup
|
continue;
|
}
|
}
|
|
if (isDefault) {
|
if (t_pri >= ANDROID_PRIORITY_BACKGROUND) {
|
// This task wants to stay at background
|
// update its cpuset so it doesn't only run on bg core(s)
|
if (cpusets_enabled()) {
|
int err = set_cpuset_policy(t_pid, sp);
|
if (err != NO_ERROR) {
|
signalExceptionForGroupError(env, -err, t_pid);
|
break;
|
}
|
}
|
continue;
|
}
|
}
|
int err;
|
|
if (cpusets_enabled()) {
|
// set both cpuset and cgroup for general threads
|
err = set_cpuset_policy(t_pid, sp);
|
if (err != NO_ERROR) {
|
signalExceptionForGroupError(env, -err, t_pid);
|
break;
|
}
|
}
|
|
err = set_sched_policy(t_pid, sp);
|
if (err != NO_ERROR) {
|
signalExceptionForGroupError(env, -err, t_pid);
|
break;
|
}
|
|
}
|
closedir(d);
|
}
|
|
jint android_os_Process_getProcessGroup(JNIEnv* env, jobject clazz, jint pid)
|
{
|
SchedPolicy sp;
|
if (get_sched_policy(pid, &sp) != 0) {
|
signalExceptionForGroupError(env, errno, pid);
|
}
|
return (int) sp;
|
}
|
|
/** Sample CPUset list format:
|
* 0-3,4,6-8
|
*/
|
static void parse_cpuset_cpus(char *cpus, cpu_set_t *cpu_set) {
|
unsigned int start, end, matched, i;
|
char *cpu_range = strtok(cpus, ",");
|
while (cpu_range != NULL) {
|
start = end = 0;
|
matched = sscanf(cpu_range, "%u-%u", &start, &end);
|
cpu_range = strtok(NULL, ",");
|
if (start >= CPU_SETSIZE) {
|
ALOGE("parse_cpuset_cpus: ignoring CPU number larger than %d.", CPU_SETSIZE);
|
continue;
|
} else if (end >= CPU_SETSIZE) {
|
ALOGE("parse_cpuset_cpus: ignoring CPU numbers larger than %d.", CPU_SETSIZE);
|
end = CPU_SETSIZE - 1;
|
}
|
if (matched == 1) {
|
CPU_SET(start, cpu_set);
|
} else if (matched == 2) {
|
for (i = start; i <= end; i++) {
|
CPU_SET(i, cpu_set);
|
}
|
} else {
|
ALOGE("Failed to match cpus");
|
}
|
}
|
return;
|
}
|
|
/**
|
* Stores the CPUs assigned to the cpuset corresponding to the
|
* SchedPolicy in the passed in cpu_set.
|
*/
|
static void get_cpuset_cores_for_policy(SchedPolicy policy, cpu_set_t *cpu_set)
|
{
|
FILE *file;
|
std::string filename;
|
|
CPU_ZERO(cpu_set);
|
|
switch (policy) {
|
case SP_BACKGROUND:
|
if (!CgroupGetAttributePath("LowCapacityCPUs", &filename)) {
|
return;
|
}
|
break;
|
case SP_FOREGROUND:
|
case SP_AUDIO_APP:
|
case SP_AUDIO_SYS:
|
case SP_RT_APP:
|
if (!CgroupGetAttributePath("HighCapacityCPUs", &filename)) {
|
return;
|
}
|
break;
|
case SP_TOP_APP:
|
if (!CgroupGetAttributePath("MaxCapacityCPUs", &filename)) {
|
return;
|
}
|
break;
|
default:
|
return;
|
}
|
|
file = fopen(filename.c_str(), "re");
|
if (file != NULL) {
|
// Parse cpus string
|
char *line = NULL;
|
size_t len = 0;
|
ssize_t num_read = getline(&line, &len, file);
|
fclose (file);
|
if (num_read > 0) {
|
parse_cpuset_cpus(line, cpu_set);
|
} else {
|
ALOGE("Failed to read %s", filename.c_str());
|
}
|
free(line);
|
}
|
return;
|
}
|
|
|
/**
|
* Determine CPU cores exclusively assigned to the
|
* cpuset corresponding to the SchedPolicy and store
|
* them in the passed in cpu_set_t
|
*/
|
void get_exclusive_cpuset_cores(SchedPolicy policy, cpu_set_t *cpu_set) {
|
if (cpusets_enabled()) {
|
int i;
|
cpu_set_t tmp_set;
|
get_cpuset_cores_for_policy(policy, cpu_set);
|
for (i = 0; i < SP_CNT; i++) {
|
if ((SchedPolicy) i == policy) continue;
|
get_cpuset_cores_for_policy((SchedPolicy)i, &tmp_set);
|
// First get cores exclusive to one set or the other
|
CPU_XOR(&tmp_set, cpu_set, &tmp_set);
|
// Then get the ones only in cpu_set
|
CPU_AND(cpu_set, cpu_set, &tmp_set);
|
}
|
} else {
|
CPU_ZERO(cpu_set);
|
}
|
return;
|
}
|
|
jintArray android_os_Process_getExclusiveCores(JNIEnv* env, jobject clazz) {
|
SchedPolicy sp;
|
cpu_set_t cpu_set;
|
jintArray cpus;
|
int pid = getpid();
|
if (get_sched_policy(pid, &sp) != 0) {
|
signalExceptionForGroupError(env, errno, pid);
|
return NULL;
|
}
|
get_exclusive_cpuset_cores(sp, &cpu_set);
|
int num_cpus = CPU_COUNT(&cpu_set);
|
cpus = env->NewIntArray(num_cpus);
|
if (cpus == NULL) {
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return NULL;
|
}
|
|
jint* cpu_elements = env->GetIntArrayElements(cpus, 0);
|
int count = 0;
|
for (int i = 0; i < CPU_SETSIZE && count < num_cpus; i++) {
|
if (CPU_ISSET(i, &cpu_set)) {
|
cpu_elements[count++] = i;
|
}
|
}
|
|
env->ReleaseIntArrayElements(cpus, cpu_elements, 0);
|
return cpus;
|
}
|
|
static void android_os_Process_setCanSelfBackground(JNIEnv* env, jobject clazz, jboolean bgOk) {
|
// Establishes the calling thread as illegal to put into the background.
|
// Typically used only for the system process's main looper.
|
#if GUARD_THREAD_PRIORITY
|
ALOGV("Process.setCanSelfBackground(%d) : tid=%d", bgOk, gettid());
|
{
|
Mutex::Autolock _l(gKeyCreateMutex);
|
if (gBgKey == -1) {
|
pthread_key_create(&gBgKey, NULL);
|
}
|
}
|
|
// inverted: not-okay, we set a sentinel value
|
pthread_setspecific(gBgKey, (void*)(bgOk ? 0 : 0xbaad));
|
#endif
|
}
|
|
jint android_os_Process_getThreadScheduler(JNIEnv* env, jclass clazz,
|
jint tid)
|
{
|
int policy = 0;
|
// linux has sched_getscheduler(), others don't.
|
#if defined(__linux__)
|
errno = 0;
|
policy = sched_getscheduler(tid);
|
if (errno != 0) {
|
signalExceptionForPriorityError(env, errno, tid);
|
}
|
#else
|
signalExceptionForPriorityError(env, ENOSYS, tid);
|
#endif
|
return policy;
|
}
|
|
void android_os_Process_setThreadScheduler(JNIEnv* env, jclass clazz,
|
jint tid, jint policy, jint pri)
|
{
|
// linux has sched_setscheduler(), others don't.
|
#if defined(__linux__)
|
struct sched_param param;
|
param.sched_priority = pri;
|
int rc = sched_setscheduler(tid, policy, ¶m);
|
if (rc) {
|
signalExceptionForPriorityError(env, errno, tid);
|
}
|
#else
|
signalExceptionForPriorityError(env, ENOSYS, tid);
|
#endif
|
}
|
|
void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz,
|
jint pid, jint pri)
|
{
|
#if GUARD_THREAD_PRIORITY
|
// if we're putting the current thread into the background, check the TLS
|
// to make sure this thread isn't guarded. If it is, raise an exception.
|
if (pri >= ANDROID_PRIORITY_BACKGROUND) {
|
if (pid == gettid()) {
|
void* bgOk = pthread_getspecific(gBgKey);
|
if (bgOk == ((void*)0xbaad)) {
|
ALOGE("Thread marked fg-only put self in background!");
|
jniThrowException(env, "java/lang/SecurityException", "May not put this thread into background");
|
return;
|
}
|
}
|
}
|
#endif
|
|
int rc = androidSetThreadPriority(pid, pri);
|
if (rc != 0) {
|
if (rc == INVALID_OPERATION) {
|
signalExceptionForPriorityError(env, errno, pid);
|
} else {
|
signalExceptionForGroupError(env, errno, pid);
|
}
|
}
|
|
//ALOGI("Setting priority of %" PRId32 ": %" PRId32 ", getpriority returns %d\n",
|
// pid, pri, getpriority(PRIO_PROCESS, pid));
|
}
|
|
void android_os_Process_setCallingThreadPriority(JNIEnv* env, jobject clazz,
|
jint pri)
|
{
|
android_os_Process_setThreadPriority(env, clazz, gettid(), pri);
|
}
|
|
jint android_os_Process_getThreadPriority(JNIEnv* env, jobject clazz,
|
jint pid)
|
{
|
errno = 0;
|
jint pri = getpriority(PRIO_PROCESS, pid);
|
if (errno != 0) {
|
signalExceptionForPriorityError(env, errno, pid);
|
}
|
//ALOGI("Returning priority of %" PRId32 ": %" PRId32 "\n", pid, pri);
|
return pri;
|
}
|
|
jboolean android_os_Process_setSwappiness(JNIEnv *env, jobject clazz,
|
jint pid, jboolean is_increased)
|
{
|
char text[64];
|
|
if (is_increased) {
|
strcpy(text, "/sys/fs/cgroup/memory/sw/tasks");
|
} else {
|
strcpy(text, "/sys/fs/cgroup/memory/tasks");
|
}
|
|
struct stat st;
|
if (stat(text, &st) || !S_ISREG(st.st_mode)) {
|
return false;
|
}
|
|
int fd = open(text, O_WRONLY | O_CLOEXEC);
|
if (fd >= 0) {
|
sprintf(text, "%" PRId32, pid);
|
write(fd, text, strlen(text));
|
close(fd);
|
}
|
|
return true;
|
}
|
|
void android_os_Process_setArgV0(JNIEnv* env, jobject clazz, jstring name)
|
{
|
if (name == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return;
|
}
|
|
const jchar* str = env->GetStringCritical(name, 0);
|
String8 name8;
|
if (str) {
|
name8 = String8(reinterpret_cast<const char16_t*>(str),
|
env->GetStringLength(name));
|
env->ReleaseStringCritical(name, str);
|
}
|
|
if (!name8.isEmpty()) {
|
AndroidRuntime::getRuntime()->setArgv0(name8.string(), true /* setProcName */);
|
}
|
}
|
|
jint android_os_Process_setUid(JNIEnv* env, jobject clazz, jint uid)
|
{
|
return setuid(uid) == 0 ? 0 : errno;
|
}
|
|
jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint uid)
|
{
|
return setgid(uid) == 0 ? 0 : errno;
|
}
|
|
static int pid_compare(const void* v1, const void* v2)
|
{
|
//ALOGI("Compare %" PRId32 " vs %" PRId32 "\n", *((const jint*)v1), *((const jint*)v2));
|
return *((const jint*)v1) - *((const jint*)v2);
|
}
|
|
static jlong android_os_Process_getFreeMemory(JNIEnv* env, jobject clazz)
|
{
|
static const std::vector<std::string> memFreeTags = {
|
::android::meminfo::SysMemInfo::kMemFree,
|
::android::meminfo::SysMemInfo::kMemCached,
|
};
|
std::vector<uint64_t> mem(memFreeTags.size());
|
::android::meminfo::SysMemInfo smi;
|
|
if (!smi.ReadMemInfo(memFreeTags, &mem)) {
|
jniThrowRuntimeException(env, "SysMemInfo read failed to get Free Memory");
|
return -1L;
|
}
|
|
jlong sum = 0;
|
std::for_each(mem.begin(), mem.end(), [&](uint64_t val) { sum += val; });
|
return sum * 1024;
|
}
|
|
static jlong android_os_Process_getTotalMemory(JNIEnv* env, jobject clazz)
|
{
|
struct sysinfo si;
|
if (sysinfo(&si) == -1) {
|
ALOGE("sysinfo failed: %s", strerror(errno));
|
return -1;
|
}
|
|
return si.totalram;
|
}
|
|
void android_os_Process_readProcLines(JNIEnv* env, jobject clazz, jstring fileStr,
|
jobjectArray reqFields, jlongArray outFields)
|
{
|
//ALOGI("getMemInfo: %p %p", reqFields, outFields);
|
|
if (fileStr == NULL || reqFields == NULL || outFields == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return;
|
}
|
|
const char* file8 = env->GetStringUTFChars(fileStr, NULL);
|
if (file8 == NULL) {
|
return;
|
}
|
String8 file(file8);
|
env->ReleaseStringUTFChars(fileStr, file8);
|
|
jsize count = env->GetArrayLength(reqFields);
|
if (count > env->GetArrayLength(outFields)) {
|
jniThrowException(env, "java/lang/IllegalArgumentException", "Array lengths differ");
|
return;
|
}
|
|
Vector<String8> fields;
|
int i;
|
|
for (i=0; i<count; i++) {
|
jobject obj = env->GetObjectArrayElement(reqFields, i);
|
if (obj != NULL) {
|
const char* str8 = env->GetStringUTFChars((jstring)obj, NULL);
|
//ALOGI("String at %d: %p = %s", i, obj, str8);
|
if (str8 == NULL) {
|
jniThrowNullPointerException(env, "Element in reqFields");
|
return;
|
}
|
fields.add(String8(str8));
|
env->ReleaseStringUTFChars((jstring)obj, str8);
|
} else {
|
jniThrowNullPointerException(env, "Element in reqFields");
|
return;
|
}
|
}
|
|
jlong* sizesArray = env->GetLongArrayElements(outFields, 0);
|
if (sizesArray == NULL) {
|
return;
|
}
|
|
//ALOGI("Clearing %" PRId32 " sizes", count);
|
for (i=0; i<count; i++) {
|
sizesArray[i] = 0;
|
}
|
|
int fd = open(file.string(), O_RDONLY | O_CLOEXEC);
|
|
if (fd >= 0) {
|
const size_t BUFFER_SIZE = 4096;
|
char* buffer = (char*)malloc(BUFFER_SIZE);
|
int len = read(fd, buffer, BUFFER_SIZE-1);
|
close(fd);
|
|
if (len < 0) {
|
ALOGW("Unable to read %s", file.string());
|
len = 0;
|
}
|
buffer[len] = 0;
|
|
int foundCount = 0;
|
|
char* p = buffer;
|
while (*p && foundCount < count) {
|
bool skipToEol = true;
|
//ALOGI("Parsing at: %s", p);
|
for (i=0; i<count; i++) {
|
const String8& field = fields[i];
|
if (strncmp(p, field.string(), field.length()) == 0) {
|
p += field.length();
|
while (*p == ' ' || *p == '\t') p++;
|
char* num = p;
|
while (*p >= '0' && *p <= '9') p++;
|
skipToEol = *p != '\n';
|
if (*p != 0) {
|
*p = 0;
|
p++;
|
}
|
char* end;
|
sizesArray[i] = strtoll(num, &end, 10);
|
//ALOGI("Field %s = %" PRId64, field.string(), sizesArray[i]);
|
foundCount++;
|
break;
|
}
|
}
|
if (skipToEol) {
|
while (*p && *p != '\n') {
|
p++;
|
}
|
if (*p == '\n') {
|
p++;
|
}
|
}
|
}
|
|
free(buffer);
|
} else {
|
ALOGW("Unable to open %s", file.string());
|
}
|
|
//ALOGI("Done!");
|
env->ReleaseLongArrayElements(outFields, sizesArray, 0);
|
}
|
|
jintArray android_os_Process_getPids(JNIEnv* env, jobject clazz,
|
jstring file, jintArray lastArray)
|
{
|
if (file == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return NULL;
|
}
|
|
const char* file8 = env->GetStringUTFChars(file, NULL);
|
if (file8 == NULL) {
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return NULL;
|
}
|
|
DIR* dirp = opendir(file8);
|
|
env->ReleaseStringUTFChars(file, file8);
|
|
if(dirp == NULL) {
|
return NULL;
|
}
|
|
jsize curCount = 0;
|
jint* curData = NULL;
|
if (lastArray != NULL) {
|
curCount = env->GetArrayLength(lastArray);
|
curData = env->GetIntArrayElements(lastArray, 0);
|
}
|
|
jint curPos = 0;
|
|
struct dirent* entry;
|
while ((entry=readdir(dirp)) != NULL) {
|
const char* p = entry->d_name;
|
while (*p) {
|
if (*p < '0' || *p > '9') break;
|
p++;
|
}
|
if (*p != 0) continue;
|
|
char* end;
|
int pid = strtol(entry->d_name, &end, 10);
|
//ALOGI("File %s pid=%d\n", entry->d_name, pid);
|
if (curPos >= curCount) {
|
jsize newCount = (curCount == 0) ? 10 : (curCount*2);
|
jintArray newArray = env->NewIntArray(newCount);
|
if (newArray == NULL) {
|
closedir(dirp);
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return NULL;
|
}
|
jint* newData = env->GetIntArrayElements(newArray, 0);
|
if (curData != NULL) {
|
memcpy(newData, curData, sizeof(jint)*curCount);
|
env->ReleaseIntArrayElements(lastArray, curData, 0);
|
}
|
lastArray = newArray;
|
curCount = newCount;
|
curData = newData;
|
}
|
|
curData[curPos] = pid;
|
curPos++;
|
}
|
|
closedir(dirp);
|
|
if (curData != NULL && curPos > 0) {
|
qsort(curData, curPos, sizeof(jint), pid_compare);
|
}
|
|
while (curPos < curCount) {
|
curData[curPos] = -1;
|
curPos++;
|
}
|
|
if (curData != NULL) {
|
env->ReleaseIntArrayElements(lastArray, curData, 0);
|
}
|
|
return lastArray;
|
}
|
|
enum {
|
PROC_TERM_MASK = 0xff,
|
PROC_ZERO_TERM = 0,
|
PROC_SPACE_TERM = ' ',
|
PROC_COMBINE = 0x100,
|
PROC_PARENS = 0x200,
|
PROC_QUOTES = 0x400,
|
PROC_CHAR = 0x800,
|
PROC_OUT_STRING = 0x1000,
|
PROC_OUT_LONG = 0x2000,
|
PROC_OUT_FLOAT = 0x4000,
|
};
|
|
jboolean android_os_Process_parseProcLineArray(JNIEnv* env, jobject clazz,
|
char* buffer, jint startIndex, jint endIndex, jintArray format,
|
jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats)
|
{
|
|
const jsize NF = env->GetArrayLength(format);
|
const jsize NS = outStrings ? env->GetArrayLength(outStrings) : 0;
|
const jsize NL = outLongs ? env->GetArrayLength(outLongs) : 0;
|
const jsize NR = outFloats ? env->GetArrayLength(outFloats) : 0;
|
|
jint* formatData = env->GetIntArrayElements(format, 0);
|
jlong* longsData = outLongs ?
|
env->GetLongArrayElements(outLongs, 0) : NULL;
|
jfloat* floatsData = outFloats ?
|
env->GetFloatArrayElements(outFloats, 0) : NULL;
|
if (formatData == NULL || (NL > 0 && longsData == NULL)
|
|| (NR > 0 && floatsData == NULL)) {
|
if (formatData != NULL) {
|
env->ReleaseIntArrayElements(format, formatData, 0);
|
}
|
if (longsData != NULL) {
|
env->ReleaseLongArrayElements(outLongs, longsData, 0);
|
}
|
if (floatsData != NULL) {
|
env->ReleaseFloatArrayElements(outFloats, floatsData, 0);
|
}
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return JNI_FALSE;
|
}
|
|
jsize i = startIndex;
|
jsize di = 0;
|
|
jboolean res = JNI_TRUE;
|
|
for (jsize fi=0; fi<NF; fi++) {
|
jint mode = formatData[fi];
|
if ((mode&PROC_PARENS) != 0) {
|
i++;
|
} else if ((mode&PROC_QUOTES) != 0) {
|
if (buffer[i] == '"') {
|
i++;
|
} else {
|
mode &= ~PROC_QUOTES;
|
}
|
}
|
const char term = (char)(mode&PROC_TERM_MASK);
|
const jsize start = i;
|
if (i >= endIndex) {
|
if (kDebugProc) {
|
ALOGW("Ran off end of data @%d", i);
|
}
|
res = JNI_FALSE;
|
break;
|
}
|
|
jsize end = -1;
|
if ((mode&PROC_PARENS) != 0) {
|
while (i < endIndex && buffer[i] != ')') {
|
i++;
|
}
|
end = i;
|
i++;
|
} else if ((mode&PROC_QUOTES) != 0) {
|
while (buffer[i] != '"' && i < endIndex) {
|
i++;
|
}
|
end = i;
|
i++;
|
}
|
while (i < endIndex && buffer[i] != term) {
|
i++;
|
}
|
if (end < 0) {
|
end = i;
|
}
|
|
if (i < endIndex) {
|
i++;
|
if ((mode&PROC_COMBINE) != 0) {
|
while (i < endIndex && buffer[i] == term) {
|
i++;
|
}
|
}
|
}
|
|
//ALOGI("Field %" PRId32 ": %" PRId32 "-%" PRId32 " dest=%" PRId32 " mode=0x%" PRIx32 "\n", i, start, end, di, mode);
|
|
if ((mode&(PROC_OUT_FLOAT|PROC_OUT_LONG|PROC_OUT_STRING)) != 0) {
|
char c = buffer[end];
|
buffer[end] = 0;
|
if ((mode&PROC_OUT_FLOAT) != 0 && di < NR) {
|
char* end;
|
floatsData[di] = strtof(buffer+start, &end);
|
}
|
if ((mode&PROC_OUT_LONG) != 0 && di < NL) {
|
if ((mode&PROC_CHAR) != 0) {
|
// Caller wants single first character returned as one long.
|
longsData[di] = buffer[start];
|
} else {
|
char* end;
|
longsData[di] = strtoll(buffer+start, &end, 10);
|
}
|
}
|
if ((mode&PROC_OUT_STRING) != 0 && di < NS) {
|
jstring str = env->NewStringUTF(buffer+start);
|
env->SetObjectArrayElement(outStrings, di, str);
|
}
|
buffer[end] = c;
|
di++;
|
}
|
}
|
|
env->ReleaseIntArrayElements(format, formatData, 0);
|
if (longsData != NULL) {
|
env->ReleaseLongArrayElements(outLongs, longsData, 0);
|
}
|
if (floatsData != NULL) {
|
env->ReleaseFloatArrayElements(outFloats, floatsData, 0);
|
}
|
|
return res;
|
}
|
|
jboolean android_os_Process_parseProcLine(JNIEnv* env, jobject clazz,
|
jbyteArray buffer, jint startIndex, jint endIndex, jintArray format,
|
jobjectArray outStrings, jlongArray outLongs, jfloatArray outFloats)
|
{
|
jbyte* bufferArray = env->GetByteArrayElements(buffer, NULL);
|
|
jboolean result = android_os_Process_parseProcLineArray(env, clazz,
|
(char*) bufferArray, startIndex, endIndex, format, outStrings,
|
outLongs, outFloats);
|
|
env->ReleaseByteArrayElements(buffer, bufferArray, 0);
|
|
return result;
|
}
|
|
jboolean android_os_Process_readProcFile(JNIEnv* env, jobject clazz,
|
jstring file, jintArray format, jobjectArray outStrings,
|
jlongArray outLongs, jfloatArray outFloats)
|
{
|
if (file == NULL || format == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return JNI_FALSE;
|
}
|
|
const char* file8 = env->GetStringUTFChars(file, NULL);
|
if (file8 == NULL) {
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return JNI_FALSE;
|
}
|
int fd = open(file8, O_RDONLY | O_CLOEXEC);
|
|
if (fd < 0) {
|
if (kDebugProc) {
|
ALOGW("Unable to open process file: %s\n", file8);
|
}
|
env->ReleaseStringUTFChars(file, file8);
|
return JNI_FALSE;
|
}
|
env->ReleaseStringUTFChars(file, file8);
|
|
std::vector<char> fileBuffer(kReadSize);
|
int numBytesRead = 0;
|
while (true) {
|
// Resize buffer to make space for contents. This might be more than we need, but once we've
|
// read we resize back down
|
fileBuffer.resize(numBytesRead + kReadSize, 0);
|
// Read in contents
|
int len = TEMP_FAILURE_RETRY(read(fd, fileBuffer.data() + numBytesRead, kReadSize));
|
numBytesRead += len;
|
if (len < 0) {
|
// If `len` is negative, an error occurred on read
|
if (kDebugProc) {
|
ALOGW("Unable to open process file: %s fd=%d\n", file8, fd);
|
}
|
close(fd);
|
return JNI_FALSE;
|
} else if (len == 0) {
|
// If nothing read, we're done
|
break;
|
}
|
}
|
// Resize back down to the amount we read
|
fileBuffer.resize(numBytesRead);
|
// Terminate buffer with null byte
|
fileBuffer.push_back('\0');
|
close(fd);
|
|
return android_os_Process_parseProcLineArray(env, clazz, fileBuffer.data(), 0, numBytesRead,
|
format, outStrings, outLongs, outFloats);
|
}
|
|
void android_os_Process_setApplicationObject(JNIEnv* env, jobject clazz,
|
jobject binderObject)
|
{
|
if (binderObject == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return;
|
}
|
|
sp<IBinder> binder = ibinderForJavaObject(env, binderObject);
|
}
|
|
void android_os_Process_sendSignal(JNIEnv* env, jobject clazz, jint pid, jint sig)
|
{
|
if (pid > 0) {
|
ALOGI("Sending signal. PID: %" PRId32 " SIG: %" PRId32, pid, sig);
|
kill(pid, sig);
|
}
|
}
|
|
void android_os_Process_sendSignalQuiet(JNIEnv* env, jobject clazz, jint pid, jint sig)
|
{
|
if (pid > 0) {
|
kill(pid, sig);
|
}
|
}
|
|
static jlong android_os_Process_getElapsedCpuTime(JNIEnv* env, jobject clazz)
|
{
|
struct timespec ts;
|
|
int res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
|
|
if (res != 0) {
|
return (jlong) 0;
|
}
|
|
nsecs_t when = seconds_to_nanoseconds(ts.tv_sec) + ts.tv_nsec;
|
return (jlong) nanoseconds_to_milliseconds(when);
|
}
|
|
static jlong android_os_Process_getPss(JNIEnv* env, jobject clazz, jint pid)
|
{
|
::android::meminfo::ProcMemInfo proc_mem(pid);
|
uint64_t pss;
|
if (!proc_mem.SmapsOrRollupPss(&pss)) {
|
return (jlong) -1;
|
}
|
|
// Return the Pss value in bytes, not kilobytes
|
return pss * 1024;
|
}
|
|
static jlongArray android_os_Process_getRss(JNIEnv* env, jobject clazz, jint pid)
|
{
|
// total, file, anon, swap
|
jlong rss[4] = {0, 0, 0, 0};
|
std::string status_path =
|
android::base::StringPrintf("/proc/%d/status", pid);
|
UniqueFile file = MakeUniqueFile(status_path.c_str(), "re");
|
|
char line[256];
|
while (file != nullptr && fgets(line, sizeof(line), file.get())) {
|
jlong v;
|
if ( sscanf(line, "VmRSS: %" SCNd64 " kB", &v) == 1) {
|
rss[0] = v;
|
} else if ( sscanf(line, "RssFile: %" SCNd64 " kB", &v) == 1) {
|
rss[1] = v;
|
} else if ( sscanf(line, "RssAnon: %" SCNd64 " kB", &v) == 1) {
|
rss[2] = v;
|
} else if ( sscanf(line, "VmSwap: %" SCNd64 " kB", &v) == 1) {
|
rss[3] = v;
|
}
|
}
|
|
jlongArray rssArray = env->NewLongArray(4);
|
if (rssArray == NULL) {
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return NULL;
|
}
|
|
env->SetLongArrayRegion(rssArray, 0, 4, rss);
|
|
return rssArray;
|
}
|
|
jintArray android_os_Process_getPidsForCommands(JNIEnv* env, jobject clazz,
|
jobjectArray commandNames)
|
{
|
if (commandNames == NULL) {
|
jniThrowNullPointerException(env, NULL);
|
return NULL;
|
}
|
|
Vector<String8> commands;
|
|
jsize count = env->GetArrayLength(commandNames);
|
|
for (int i=0; i<count; i++) {
|
jobject obj = env->GetObjectArrayElement(commandNames, i);
|
if (obj != NULL) {
|
const char* str8 = env->GetStringUTFChars((jstring)obj, NULL);
|
if (str8 == NULL) {
|
jniThrowNullPointerException(env, "Element in commandNames");
|
return NULL;
|
}
|
commands.add(String8(str8));
|
env->ReleaseStringUTFChars((jstring)obj, str8);
|
} else {
|
jniThrowNullPointerException(env, "Element in commandNames");
|
return NULL;
|
}
|
}
|
|
Vector<jint> pids;
|
|
DIR *proc = opendir("/proc");
|
if (proc == NULL) {
|
fprintf(stderr, "/proc: %s\n", strerror(errno));
|
return NULL;
|
}
|
|
struct dirent *d;
|
while ((d = readdir(proc))) {
|
int pid = atoi(d->d_name);
|
if (pid <= 0) continue;
|
|
char path[PATH_MAX];
|
char data[PATH_MAX];
|
snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
|
|
int fd = open(path, O_RDONLY | O_CLOEXEC);
|
if (fd < 0) {
|
continue;
|
}
|
const int len = read(fd, data, sizeof(data)-1);
|
close(fd);
|
|
if (len < 0) {
|
continue;
|
}
|
data[len] = 0;
|
|
for (int i=0; i<len; i++) {
|
if (data[i] == ' ') {
|
data[i] = 0;
|
break;
|
}
|
}
|
|
for (size_t i=0; i<commands.size(); i++) {
|
if (commands[i] == data) {
|
pids.add(pid);
|
break;
|
}
|
}
|
}
|
|
closedir(proc);
|
|
jintArray pidArray = env->NewIntArray(pids.size());
|
if (pidArray == NULL) {
|
jniThrowException(env, "java/lang/OutOfMemoryError", NULL);
|
return NULL;
|
}
|
|
if (pids.size() > 0) {
|
env->SetIntArrayRegion(pidArray, 0, pids.size(), pids.array());
|
}
|
|
return pidArray;
|
}
|
|
jint android_os_Process_killProcessGroup(JNIEnv* env, jobject clazz, jint uid, jint pid)
|
{
|
return killProcessGroup(uid, pid, SIGKILL);
|
}
|
|
void android_os_Process_removeAllProcessGroups(JNIEnv* env, jobject clazz)
|
{
|
return removeAllProcessGroups();
|
}
|
|
static const JNINativeMethod methods[] = {
|
{"getUidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getUidForName},
|
{"getGidForName", "(Ljava/lang/String;)I", (void*)android_os_Process_getGidForName},
|
{"setThreadPriority", "(II)V", (void*)android_os_Process_setThreadPriority},
|
{"setThreadScheduler", "(III)V", (void*)android_os_Process_setThreadScheduler},
|
{"setCanSelfBackground", "(Z)V", (void*)android_os_Process_setCanSelfBackground},
|
{"setThreadPriority", "(I)V", (void*)android_os_Process_setCallingThreadPriority},
|
{"getThreadPriority", "(I)I", (void*)android_os_Process_getThreadPriority},
|
{"getThreadScheduler", "(I)I", (void*)android_os_Process_getThreadScheduler},
|
{"setThreadGroup", "(II)V", (void*)android_os_Process_setThreadGroup},
|
{"setThreadGroupAndCpuset", "(II)V", (void*)android_os_Process_setThreadGroupAndCpuset},
|
{"setProcessGroup", "(II)V", (void*)android_os_Process_setProcessGroup},
|
{"getProcessGroup", "(I)I", (void*)android_os_Process_getProcessGroup},
|
{"getExclusiveCores", "()[I", (void*)android_os_Process_getExclusiveCores},
|
{"setSwappiness", "(IZ)Z", (void*)android_os_Process_setSwappiness},
|
{"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0},
|
{"setUid", "(I)I", (void*)android_os_Process_setUid},
|
{"setGid", "(I)I", (void*)android_os_Process_setGid},
|
{"sendSignal", "(II)V", (void*)android_os_Process_sendSignal},
|
{"sendSignalQuiet", "(II)V", (void*)android_os_Process_sendSignalQuiet},
|
{"getFreeMemory", "()J", (void*)android_os_Process_getFreeMemory},
|
{"getTotalMemory", "()J", (void*)android_os_Process_getTotalMemory},
|
{"readProcLines", "(Ljava/lang/String;[Ljava/lang/String;[J)V", (void*)android_os_Process_readProcLines},
|
{"getPids", "(Ljava/lang/String;[I)[I", (void*)android_os_Process_getPids},
|
{"readProcFile", "(Ljava/lang/String;[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_readProcFile},
|
{"parseProcLine", "([BII[I[Ljava/lang/String;[J[F)Z", (void*)android_os_Process_parseProcLine},
|
{"getElapsedCpuTime", "()J", (void*)android_os_Process_getElapsedCpuTime},
|
{"getPss", "(I)J", (void*)android_os_Process_getPss},
|
{"getRss", "(I)[J", (void*)android_os_Process_getRss},
|
{"getPidsForCommands", "([Ljava/lang/String;)[I", (void*)android_os_Process_getPidsForCommands},
|
//{"setApplicationObject", "(Landroid/os/IBinder;)V", (void*)android_os_Process_setApplicationObject},
|
{"killProcessGroup", "(II)I", (void*)android_os_Process_killProcessGroup},
|
{"removeAllProcessGroups", "()V", (void*)android_os_Process_removeAllProcessGroups},
|
};
|
|
int register_android_os_Process(JNIEnv* env)
|
{
|
return RegisterMethodsOrDie(env, "android/os/Process", methods, NELEM(methods));
|
}
|
