void os_changeThreadPriority(Thread* thread, int newPriority)
{
FASTIVA_LATE_IMPL();
#if 0
if (newPriority < 1 || newPriority > 10) {
ALOGW("bad priority %d", newPriority);
newPriority = 5;
}
int newNice = kNiceValues[newPriority-1];
pid_t pid = thread->systemTid;
if (newNice >= ANDROID_PRIORITY_BACKGROUND) {
set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
} else if (getpriority(PRIO_PROCESS, pid) >= ANDROID_PRIORITY_BACKGROUND) {
set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
}
if (setpriority(PRIO_PROCESS, pid, newNice) != 0) {
std::string threadName(dvmGetThreadName(thread));
ALOGI("setPriority(%d) '%s' to prio=%d(n=%d) failed: %s",
pid, threadName.c_str(), newPriority, newNice, strerror(errno));
} else {
ALOGV("setPriority(%d) to prio=%d(n=%d)", pid, newPriority, newNice);
}
#endif
}
int os_raiseThreadPriority()
{
/* Get the priority (the "nice" value) of the current thread. The
* getpriority() call can legitimately return -1, so we have to
* explicitly test errno.
*/
errno = 0;
int oldThreadPriority = getpriority(PRIO_PROCESS, 0);
if (errno != 0) {
ALOGI("getpriority(self) failed: %s", strerror(errno));
} else if (oldThreadPriority > ANDROID_PRIORITY_NORMAL) {
/* Current value is numerically greater than "normal", which
* in backward UNIX terms means lower priority.
*/
if (oldThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL) != 0) {
ALOGI("Unable to elevate priority from %d to %d",
oldThreadPriority, ANDROID_PRIORITY_NORMAL);
} else {
/*
* The priority has been elevated. Return the old value
* so the caller can restore it later.
*/
ALOGV("Elevating priority from %d to %d",
oldThreadPriority, ANDROID_PRIORITY_NORMAL);
return oldThreadPriority;
}
}
return INT_MAX;
}
/*
* 参数 : void* arg I 线程参数
* 返回 : void
* 描述 : 报告线程
* 历史 :
* 备注 :
*/
static void* report_thread(void *arg)
{
uint64_t event_type;
event_payload_u_type event_data;
set_sched_policy(gettid(), SP_FOREGROUND);
while (1) {
pthread_mutex_lock(&inter_context.data_lock);
if (inter_context.report_thread_status == REPORT_STATUS_IDEL) {
inter_context.release_wakelock_cb();
pthread_cond_wait(&inter_context.data_cond, &inter_context.data_lock);
inter_context.acquire_wakelock_cb();
}
if (inter_context.report_thread_status == REPORT_STATUS_QUIT) {
pthread_mutex_unlock(&inter_context.data_lock);
break;
}
inter_context.report_thread_status = REPORT_STATUS_IDEL;
event_type = inter_context.event_type;
//lzg todo
memcpy(&event_data, &inter_context.event_payload, sizeof(event_data));
pthread_mutex_unlock(&inter_context.data_lock);
//GPS_LOGD("report_hread report...");
iwise_interface_process_loc_event(event_type, &event_data);
}
return 0;
}
// static
void *TimedEventQueue::ThreadWrapper(void *me) {
#ifdef ANDROID_SIMULATOR
// The simulator runs everything as one process, so any
// Binder calls happen on this thread instead of a thread
// in another process. We therefore need to make sure that
// this thread can do calls into interpreted code.
// On the device this is not an issue because the remote
// thread will already be set up correctly for this.
JavaVM *vm;
int numvms;
JNI_GetCreatedJavaVMs(&vm, 1, &numvms);
JNIEnv *env;
vm->AttachCurrentThread(&env, NULL);
#endif
#ifndef TARGET_OMAP4
setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_FOREGROUND);
#else
setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_URGENT_AUDIO);
#endif
set_sched_policy(androidGetTid(), SP_FOREGROUND);
static_cast<TimedEventQueue *>(me)->threadEntry();
#ifdef ANDROID_SIMULATOR
vm->DetachCurrentThread();
#endif
return NULL;
}
int set_cpuset_policy(int tid, SchedPolicy policy)
{
// in the absence of cpusets, use the old sched policy
#ifndef USE_CPUSETS
return set_sched_policy(tid, policy);
#else
if (tid == 0) {
tid = gettid();
}
policy = _policy(policy);
pthread_once(&the_once, __initialize);
int fd;
switch (policy) {
case SP_BACKGROUND:
fd = bg_cpuset_fd;
break;
case SP_FOREGROUND:
case SP_AUDIO_APP:
case SP_AUDIO_SYS:
fd = fg_cpuset_fd;
break;
default:
fd = -1;
break;
}
if (add_tid_to_cgroup(tid, fd) != 0) {
if (errno != ESRCH && errno != ENOENT)
return -errno;
}
return 0;
#endif
}
static void *reinit_thread_start(void * /*obj*/) {
prctl(PR_SET_NAME, "logd.daemon");
set_sched_policy(0, SP_BACKGROUND);
setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND);
setgid(AID_SYSTEM);
setuid(AID_SYSTEM);
while (reinit_running && !sem_wait(&reinit) && reinit_running) {
// uidToName Privileged Worker
if (uid) {
name = NULL;
FILE *fp = fopen("/data/system/packages.list", "r");
if (fp) {
// This simple parser is sensitive to format changes in
// frameworks/base/services/core/java/com/android/server/pm/Settings.java
// A dependency note has been added to that file to correct
// this parser.
char *buffer = NULL;
size_t len;
while (getline(&buffer, &len, fp) > 0) {
char *userId = strchr(buffer, ' ');
if (!userId) {
continue;
}
*userId = '\0';
unsigned long value = strtoul(userId + 1, NULL, 10);
if (value != uid) {
continue;
}
name = strdup(buffer);
break;
}
free(buffer);
fclose(fp);
}
uid = 0;
sem_post(&uidName);
continue;
}
if (fdDmesg >= 0) {
static const char reinit_message[] = { KMSG_PRIORITY(LOG_INFO),
'l', 'o', 'g', 'd', '.', 'd', 'a', 'e', 'm', 'o', 'n', ':',
' ', 'r', 'e', 'i', 'n', 'i', 't', '\n' };
write(fdDmesg, reinit_message, sizeof(reinit_message));
}
// Anything that reads persist.<property>
if (logBuf) {
logBuf->init();
}
}
return NULL;
}
static int drop_privs() {
struct sched_param param;
memset(¶m, 0, sizeof(param));
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
return -1;
}
if (sched_setscheduler((pid_t) 0, SCHED_BATCH, ¶m) < 0) {
return -1;
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
return -1;
}
if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
return -1;
}
gid_t groups[] = { AID_READPROC };
if (setgroups(sizeof(groups) / sizeof(groups[0]), groups) == -1) {
return -1;
}
if (setgid(AID_LOGD) != 0) {
return -1;
}
if (setuid(AID_LOGD) != 0) {
return -1;
}
struct __user_cap_header_struct capheader;
struct __user_cap_data_struct capdata[2];
memset(&capheader, 0, sizeof(capheader));
memset(&capdata, 0, sizeof(capdata));
capheader.version = _LINUX_CAPABILITY_VERSION_3;
capheader.pid = 0;
capdata[CAP_TO_INDEX(CAP_SYSLOG)].permitted = CAP_TO_MASK(CAP_SYSLOG);
capdata[CAP_TO_INDEX(CAP_AUDIT_CONTROL)].permitted |= CAP_TO_MASK(CAP_AUDIT_CONTROL);
capdata[0].effective = capdata[0].permitted;
capdata[1].effective = capdata[1].permitted;
capdata[0].inheritable = 0;
capdata[1].inheritable = 0;
if (capset(&capheader, &capdata[0]) < 0) {
return -1;
}
return 0;
}
void os_lowerThreadPriority(int oldThreadPriority)
{
if (setpriority(PRIO_PROCESS, 0, oldThreadPriority) != 0) {
ALOGW("Unable to reset priority to %d: %s",
oldThreadPriority, strerror(errno));
} else {
ALOGV("Reset priority to %d", oldThreadPriority);
}
if (oldThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
}
}
main(void)
{
set_sched_policy(1);
//int i = 0;
//for (i = 0; i<100000; ++i);
int ret_fork;
ret_fork = -1;
ret_fork = fork();
//write(1, "\n1: ", 4);
//write_int(ret_fork);
if (ret_fork == 0){
write(1, "fork1!", 6);
WL1();
}
ret_fork = -1;
ret_fork = fork();
//write(1, "\n2: ", 4);
//write_int(ret_fork);
if (ret_fork == 0){
write(1, "fork2!", 6);
WL2();
}
ret_fork = -1;
ret_fork = fork();
//write(1, "\n3: ", 4);
//write_int(ret_fork);
if (ret_fork == 0){
write(1, "fork3!", 6);
WL3();
}
//char *inutilbuf;
//read(0, &inutilbuf, 1000);
//print_stats(getpid());
while (1);
}
static void setupOutput()
{
if (g_outputFileName == NULL) {
g_outFD = STDOUT_FILENO;
} else {
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
fprintf(stderr, "failed to set background scheduling policy\n");
}
struct sched_param param;
memset(¶m, 0, sizeof(param));
if (sched_setscheduler((pid_t) 0, SCHED_BATCH, ¶m) < 0) {
fprintf(stderr, "failed to set to batch scheduler\n");
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
fprintf(stderr, "failed set to priority\n");
}
g_outFD = openLogFile (g_outputFileName);
if (g_outFD < 0) {
logcat_panic(false, "couldn't open output file");
}
struct stat statbuf;
if (fstat(g_outFD, &statbuf) == -1) {
close(g_outFD);
logcat_panic(false, "couldn't get output file stat\n");
}
if ((size_t) statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) {
close(g_outFD);
logcat_panic(false, "invalid output file stat\n");
}
g_outByteCount = statbuf.st_size;
}
}
static void *reinit_thread_start(void * /*obj*/) {
prctl(PR_SET_NAME, "logd.daemon");
set_sched_policy(0, SP_BACKGROUND);
setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND);
setgid(AID_SYSTEM);
setuid(AID_SYSTEM);
while (reinit_running && !sem_wait(&reinit) && reinit_running) {
// uidToName Privileged Worker
if (uid) {
name = NULL;
packagelist_parse(package_list_parser_cb, NULL);
uid = 0;
sem_post(&uidName);
continue;
}
if (fdDmesg >= 0) {
static const char reinit_message[] = { KMSG_PRIORITY(LOG_INFO),
'l', 'o', 'g', 'd', '.', 'd', 'a', 'e', 'm', 'o', 'n', ':',
' ', 'r', 'e', 'i', 'n', 'i', 't', '\n' };
write(fdDmesg, reinit_message, sizeof(reinit_message));
}
// Anything that reads persist.<property>
if (logBuf) {
logBuf->init();
logBuf->initPrune(NULL);
}
if (logAudit) {
logAudit->allowSafeMode();
}
}
return NULL;
}
void AudioRecord::stop()
{
AutoMutex lock(mLock);
if (!mActive) {
return;
}
mActive = false;
mProxy->interrupt();
mAudioRecord->stop();
// the record head position will reset to 0, so if a marker is set, we need
// to activate it again
mMarkerReached = false;
sp<AudioRecordThread> t = mAudioRecordThread;
if (t != 0) {
t->pause();
} else {
setpriority(PRIO_PROCESS, 0, mPreviousPriority);
set_sched_policy(0, mPreviousSchedulingGroup);
}
}
/*****************************************************************************
**
** Function raise_priority_a2dp
**
** Description Raise task priority for A2DP streaming
**
** Returns void
**
*******************************************************************************/
void raise_priority_a2dp(tHIGH_PRIORITY_TASK high_task) {
int rc = 0;
int tid = gettid();
pthread_mutex_lock(&gIdxLock);
g_TaskIdx = high_task;
pthread_once(&g_DoSchedulingGroupOnce[g_TaskIdx], check_do_scheduling_group);
if (g_DoSchedulingGroup[g_TaskIdx]) {
// set_sched_policy does not support tid == 0
rc = set_sched_policy(tid, SP_FOREGROUND);
}
pthread_mutex_unlock(&gIdxLock);
if (rc) {
ALOGW("failed to change sched policy, tid %d, err: %d", tid, errno);
}
if (setpriority(PRIO_PROCESS, tid, ANDROID_PRIORITY_AUDIO) < 0) {
ALOGW("failed to change priority tid: %d to %d", tid, ANDROID_PRIORITY_AUDIO);
}
}
void AudioRecord::stop()
{
AutoMutex lock(mLock);
if (!mActive) {
return;
}
mActive = false;
mProxy->interrupt();
mAudioRecord->stop();
// Note: legacy handling - stop does not clear record marker and
// periodic update position; we update those on start().
sp<AudioRecordThread> t = mAudioRecordThread;
if (t != 0) {
t->pause();
} else {
setpriority(PRIO_PROCESS, 0, mPreviousPriority);
set_sched_policy(0, mPreviousSchedulingGroup);
}
}
int
GonkSchedulePolicyService::requestPriority(int32_t pid, int32_t tid, int32_t prio)
{
// See SchedulingPolicyService.java
#define PRIORITY_MIN 1
#define PRIORITY_MAX 3
IPCThreadState* ipcState = IPCThreadState::self();
if (ipcState->getCallingUid() != AID_MEDIA ||
prio < PRIORITY_MIN || prio > PRIORITY_MAX ||
!tidBelongsToPid(tid, pid))
return -1; /* PackageManager.PERMISSION_DENIED */
set_sched_policy(tid, ipcState->getCallingPid() == pid ?
SP_AUDIO_SYS : SP_AUDIO_APP);
struct sched_param param;
param.sched_priority = prio;
int rc = sched_setscheduler(tid, SCHED_FIFO, ¶m);
if (rc)
return -1;
return 0; /* PackageManger.PERMISSION_GRANTED */
}
static int drop_privs(bool klogd, bool auditd) {
// Tricky, if ro.build.type is "eng" then this is true because of the
// side effect that ro.debuggable == 1 as well, else it is false.
bool eng =
__android_logger_property_get_bool("ro.build.type", BOOL_DEFAULT_FALSE);
struct sched_param param;
memset(¶m, 0, sizeof(param));
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
android::prdebug("failed to set background scheduling policy");
if (!eng) return -1;
}
if (sched_setscheduler((pid_t)0, SCHED_BATCH, ¶m) < 0) {
android::prdebug("failed to set batch scheduler");
if (!eng) return -1;
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
android::prdebug("failed to set background cgroup");
if (!eng) return -1;
}
if (!eng && (prctl(PR_SET_DUMPABLE, 0) < 0)) {
android::prdebug("failed to clear PR_SET_DUMPABLE");
return -1;
}
if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
android::prdebug("failed to set PR_SET_KEEPCAPS");
if (!eng) return -1;
}
std::unique_ptr<struct _cap_struct, int (*)(void*)> caps(cap_init(),
cap_free);
if (cap_clear(caps.get()) < 0) return -1;
cap_value_t cap_value[] = { CAP_SETGID, // must be first for below
klogd ? CAP_SYSLOG : CAP_SETGID,
auditd ? CAP_AUDIT_CONTROL : CAP_SETGID };
if (cap_set_flag(caps.get(), CAP_PERMITTED, arraysize(cap_value), cap_value,
CAP_SET) < 0) {
return -1;
}
if (cap_set_flag(caps.get(), CAP_EFFECTIVE, arraysize(cap_value), cap_value,
CAP_SET) < 0) {
return -1;
}
if (cap_set_proc(caps.get()) < 0) {
android::prdebug(
"failed to set CAP_SETGID, CAP_SYSLOG or CAP_AUDIT_CONTROL (%d)",
errno);
if (!eng) return -1;
}
gid_t groups[] = { AID_READPROC };
if (setgroups(arraysize(groups), groups) == -1) {
android::prdebug("failed to set AID_READPROC groups");
if (!eng) return -1;
}
if (setgid(AID_LOGD) != 0) {
android::prdebug("failed to set AID_LOGD gid");
if (!eng) return -1;
}
if (setuid(AID_LOGD) != 0) {
android::prdebug("failed to set AID_LOGD uid");
if (!eng) return -1;
}
if (cap_set_flag(caps.get(), CAP_PERMITTED, 1, cap_value, CAP_CLEAR) < 0) {
return -1;
}
if (cap_set_flag(caps.get(), CAP_EFFECTIVE, 1, cap_value, CAP_CLEAR) < 0) {
return -1;
}
if (cap_set_proc(caps.get()) < 0) {
android::prdebug("failed to clear CAP_SETGID (%d)", errno);
if (!eng) return -1;
}
return 0;
}
static void* reinit_thread_start(void* /*obj*/) {
prctl(PR_SET_NAME, "logd.daemon");
set_sched_policy(0, SP_BACKGROUND);
setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND);
// We should drop to AID_LOGD, if we are anything else, we have
// even lesser privileges and accept our fate.
gid_t groups[] = {
AID_SYSTEM, // search access to /data/system path
AID_PACKAGE_INFO, // readonly access to /data/system/packages.list
};
if (setgroups(arraysize(groups), groups) == -1) {
android::prdebug(
"logd.daemon: failed to set AID_SYSTEM AID_PACKAGE_INFO groups");
}
if (setgid(AID_LOGD) != 0) {
android::prdebug("logd.daemon: failed to set AID_LOGD gid");
}
if (setuid(AID_LOGD) != 0) {
android::prdebug("logd.daemon: failed to set AID_LOGD uid");
}
cap_t caps = cap_init();
(void)cap_clear(caps);
(void)cap_set_proc(caps);
(void)cap_free(caps);
while (reinit_running && !sem_wait(&reinit) && reinit_running) {
// uidToName Privileged Worker
if (uid) {
name = nullptr;
// if we got the perms wrong above, this would spam if we reported
// problems with acquisition of an uid name from the packages.
(void)packagelist_parse(package_list_parser_cb, nullptr);
uid = 0;
sem_post(&uidName);
continue;
}
if (fdDmesg >= 0) {
static const char reinit_message[] = { KMSG_PRIORITY(LOG_INFO),
'l',
'o',
'g',
'd',
'.',
'd',
'a',
'e',
'm',
'o',
'n',
':',
' ',
'r',
'e',
'i',
'n',
'i',
't',
'\n' };
write(fdDmesg, reinit_message, sizeof(reinit_message));
}
// Anything that reads persist.<property>
if (logBuf) {
logBuf->init();
logBuf->initPrune(nullptr);
}
android::ReReadEventLogTags();
}
return nullptr;
}
static void setSchedPolicy(const Parcel& data)
{
SchedPolicy policy = (SchedPolicy) data.readInt32();
set_sched_policy(gettid(), policy);
}
static void restoreSchedPolicy()
{
set_sched_policy(gettid(), SP_FOREGROUND);
}
