feat: timer_create支持以SIGEV_THREAD方式创建定时器

【背景】当前timer_create接口不支持以SIGEV_THREAD的方式创建多个定时器

【修改方案】
1、内核timer_create接口在创建software timers相应的线程时，使用线程
taskCB所携带的信息识别各个线程的信号并依据该信息分别派发出信号。
2、关于用户任务操作许可验证的修改，现在允许同一用户线程向其自身派发信
号，软件定时器计时结束，向用户态发送相应的信号，完成用户态线程的回调。

【影响】
对现有的产品暂无影响。

re #I3SRFI
Signed-off-by: yansira <yansira@hotmail.com>
Change-Id: Ia23f5ef01975bf867dd7f5db797a30c264c50501

compat/posix/include/time_posix.h

@@ -42,6 +42,13 @@ extern "C" {
 #endif /* __cplusplus */
 #endif /* __cplusplus */
 
+struct ksigevent {
+    union sigval sigev_value;
+    int sigev_signo;
+    int sigev_notify;
+    int sigev_tid;
+};
+
 /* internal functions */
 STATIC INLINE BOOL ValidTimeSpec(const struct timespec *tp)
 {
@@ -78,6 +85,8 @@ STATIC INLINE VOID OsTick2TimeSpec(struct timespec *tp, UINT32 tick)
     tp->tv_nsec = (long)(ns % OS_SYS_NS_PER_SECOND);
 }
 
+int OsTimerCreate(clockid_t, struct ksigevent *__restrict, timer_t *__restrict);
+
 #ifdef __cplusplus
 #if __cplusplus
 }

compat/posix/src/time.c

@@ -693,45 +693,60 @@ int clock_nanosleep(clockid_t clk, int flags, const struct timespec *req, struct
 
 typedef struct {
     int sigev_signo;
-    UINT32 pid;
+    pid_t pid;
+    unsigned int tid;
     union sigval sigev_value;
 } swtmr_proc_arg;
 
 static VOID SwtmrProc(UINTPTR tmrArg)
 {
-    unsigned int intSave;
-    int sig;
+    INT32 sig, ret;
+    UINT32 intSave;
     pid_t pid;
     siginfo_t info;
+    LosTaskCB *stcb = NULL;
+
     swtmr_proc_arg *arg = (swtmr_proc_arg *)tmrArg;
-    if (arg == NULL) {
-        return;
-    }
+    OS_GOTO_EXIT_IF(arg == NULL, EINVAL);
 
-    sig = arg->sigev_signo + 1;
+    sig = arg->sigev_signo;
     pid = arg->pid;
-    /* Make sure that the para is valid */
-    if (!GOOD_SIGNO(sig) || pid <= 0) {
-        return;
-    }
-    if (OS_PID_CHECK_INVALID(pid)) {
-        return;
-    }
+    OS_GOTO_EXIT_IF(!GOOD_SIGNO(sig), EINVAL);
 
     /* Create the siginfo structure */
     info.si_signo = sig;
     info.si_code = SI_TIMER;
     info.si_value.sival_ptr = arg->sigev_value.sival_ptr;
 
-    /* Send the signal */
-    SCHEDULER_LOCK(intSave);
-    OsDispatch(pid, &info, OS_USER_KILL_PERMISSION);
-    SCHEDULER_UNLOCK(intSave);
-
+    /* Send signals to threads or processes */
+    if (arg->tid > 0) {
+        /* Make sure that the para is valid */
+        OS_GOTO_EXIT_IF(OS_TID_CHECK_INVALID(arg->tid), EINVAL);
+        stcb = OsGetTaskCB(arg->tid);
+        ret = OsUserProcessOperatePermissionsCheck(stcb, stcb->processID);
+        OS_GOTO_EXIT_IF(ret != LOS_OK, -ret);
+
+        /* Dispatch the signal to thread, bypassing normal task group thread
+         * dispatch rules. */
+        SCHEDULER_LOCK(intSave);
+        ret = OsTcbDispatch(stcb, &info);
+        SCHEDULER_UNLOCK(intSave);
+        OS_GOTO_EXIT_IF(ret != LOS_OK, -ret);
+    } else {
+        /* Make sure that the para is valid */
+        OS_GOTO_EXIT_IF(pid <= 0 || OS_PID_CHECK_INVALID(pid), EINVAL);
+        /* Dispatch the signal to process */
+        SCHEDULER_LOCK(intSave);
+        OsDispatch(pid, &info, OS_USER_KILL_PERMISSION);
+        SCHEDULER_UNLOCK(intSave);
+    }
+    return;
+EXIT:
+    PRINT_ERR("Dsipatch signals failed!, ret: %d\r\n", ret);
     return;
 }
 
-int timer_create(clockid_t clockID, struct sigevent *evp, timer_t *timerID)
+int OsTimerCreate(clockid_t clockID, struct ksigevent *evp, timer_t *timerID)
 {
     UINT32 ret;
     UINT16 swtmrID;
@@ -761,7 +776,9 @@ int timer_create(clockid_t clockID, struct sigevent *evp, timer_t *timerID)
         errno = ENOMEM;
         return -1;
     }
-    arg->sigev_signo = signo - 1;
+
+    arg->tid = evp ? evp->sigev_tid : 0;
+    arg->sigev_signo = signo;
     arg->pid = LOS_GetCurrProcessID();
     arg->sigev_value.sival_ptr = evp ? evp->sigev_value.sival_ptr : NULL;
     ret = LOS_SwtmrCreate(1, LOS_SWTMR_MODE_ONCE, SwtmrProc, &swtmrID, (UINTPTR)arg);
@@ -1016,14 +1033,14 @@ int setitimer(int which, const struct itimerval *value, struct itimerval *ovalue
 
     /* To avoid creating an invalid timer after the timer has already been create */
     if (processCB->timerID == (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID) {
-        ret = timer_create(CLOCK_REALTIME, NULL, &timerID);
+        ret = OsTimerCreate(CLOCK_REALTIME, NULL, &timerID);
         if (ret != LOS_OK) {
             return ret;
         }
     }
 
     /* The initialization of this global timer must be in spinlock
-     * timer_create cannot be located in spinlock.
+     * OsTimerCreate cannot be located in spinlock.
      */
     SCHEDULER_LOCK(intSave);
     if (processCB->timerID == (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID) {

kernel/base/core/los_task.c

@@ -1478,16 +1478,25 @@ LITE_OS_SEC_TEXT VOID OsExecDestroyTaskGroup(VOID)
 }
 
 UINT32 OsUserTaskOperatePermissionsCheck(LosTaskCB *taskCB)
+{
+    return OsUserProcessOperatePermissionsCheck(taskCB, OsCurrProcessGet()->processID);
+}
+
+UINT32 OsUserProcessOperatePermissionsCheck(LosTaskCB *taskCB, UINT32 processID)
 {
     if (taskCB == NULL) {
         return LOS_EINVAL;
     }
 
+    if (processID == OS_INVALID_VALUE) {
+        return OS_INVALID_VALUE;
+    }
+
     if (taskCB->taskStatus & OS_TASK_STATUS_UNUSED) {
         return LOS_EINVAL;
     }
 
-    if (OsCurrProcessGet()->processID != taskCB->processID) {
+    if (processID != taskCB->processID) {
         return LOS_EPERM;
     }
 

kernel/base/include/los_task_pri.h

@@ -542,6 +542,8 @@ extern VOID OsTaskExitGroup(UINT32 status);
 extern VOID OsTaskToExit(LosTaskCB *taskCB, UINT32 status);
 extern VOID OsExecDestroyTaskGroup(VOID);
 extern UINT32 OsUserTaskOperatePermissionsCheck(LosTaskCB *taskCB);
+extern UINT32 OsUserProcessOperatePermissionsCheck(LosTaskCB *taskCB, UINT32 processID);
+extern INT32 OsTcbDispatch(LosTaskCB *stcb, siginfo_t *info);
 extern VOID OsWriteResourceEvent(UINT32 events);
 extern VOID OsWriteResourceEventUnsafe(UINT32 events);
 extern UINT32 OsResourceFreeTaskCreate(VOID);

syscall/los_syscall.h

@@ -39,6 +39,7 @@
 #include "fs/fs.h"
 #include "syscall.h"
 #include "sysinfo.h"
+#include "time_posix.h"
 #ifdef LOSCFG_KERNEL_DYNLOAD
 #include "los_exec_elf.h"
 #endif
@@ -172,7 +173,7 @@ extern clock_t SysTimes(struct tms *buf);
 extern time_t SysTime(time_t *tloc);
 extern int SysSetiTimer(int which, const struct itimerval *value, struct itimerval *ovalue);
 extern int SysGetiTimer(int which, struct itimerval *value);
-extern int SysTimerCreate(clockid_t clockID, struct sigevent *evp, timer_t *timerID);
+extern int SysTimerCreate(clockid_t clockID, struct ksigevent *evp, timer_t *timerID);
 extern int SysTimerGettime(timer_t timerID, struct itimerspec *value);
 extern int SysTimerGetoverrun(timer_t timerID);
 extern int SysTimerDelete(timer_t timerID);

syscall/time_syscall.c

@@ -39,6 +39,7 @@
 #include "los_signal.h"
 #include "los_memory.h"
 #include "los_strncpy_from_user.h"
+#include "time_posix.h"
 
 #ifdef LOSCFG_FS_VFS
 int SysUtime(const char *path, const struct utimbuf *ptimes)
@@ -156,23 +157,23 @@ int SysGetiTimer(int which, struct itimerval *value)
     return ret;
 }
 
-int SysTimerCreate(clockid_t clockID, struct sigevent *evp, timer_t *timerID)
+int SysTimerCreate(clockid_t clockID, struct ksigevent *evp, timer_t *timerID)
 {
     int ret;
     timer_t stimerID;
-    struct sigevent sevp;
+    struct ksigevent ksevp;
 
     if (timerID == NULL) {
         errno = EINVAL;
         return -EINVAL;
     }
 
-    if (evp && LOS_ArchCopyFromUser(&sevp, evp, sizeof(struct sigevent))) {
+    if (evp && LOS_ArchCopyFromUser(&ksevp, evp, sizeof(struct ksigevent))) {
         errno = EFAULT;
         return -EFAULT;
     }
 
-    ret = timer_create(clockID, evp ? &sevp : NULL, &stimerID);
+    ret = OsTimerCreate(clockID, evp ? &ksevp : NULL, &stimerID);
     if (ret < 0) {
         return -get_errno();
     }

testsuites/unittest/time/timer/BUILD.gn

@@ -46,6 +46,7 @@ sources_smoke = [
   "smoke/timer_test_002.cpp",
   "smoke/timer_test_003.cpp",
   "smoke/timer_test_004.cpp",
+  "smoke/timer_test_005.cpp",
   "smoke/timer_test_tzset_001.cpp",
   "smoke/timer_test_tzset_002.cpp",
 ]

testsuites/unittest/time/timer/lt_timer_test.h

@@ -41,6 +41,7 @@ void TimerTest001(void);
 void TimerTest002(void);
 void TimerTest003(void);
 void TimerTest004(void);
+void TimerTest005(void);
 void TIME_TEST_TZSET_001(void);
 void TIME_TEST_TZSET_002(void);
 

testsuites/unittest/time/timer/smoke/timer_test_001.cpp

@@ -42,7 +42,7 @@ static int g_sigHdlCnt;
 static int g_overRunCnt;
 static timer_t g_timerID;
 
-static void SigHandler(int sig)
+static void SigHandler01(int sig)
 {
     g_sigHdlCnt++;
     g_overRunCnt += timer_getoverrun(g_timerID);
@@ -52,7 +52,7 @@ static void SigHandler(int sig)
 static int TimerTest(void)
 {
     int interval = 3; // 3, seconds
-    timer_t timerid;
+    timer_t timerid01, timerid02;
     struct sigevent sev;
     struct itimerspec its;
     sigset_t mask;
@@ -60,7 +60,7 @@ static int TimerTest(void)
     int ret;
 
     sa.sa_flags = 0;
-    sa.sa_handler = SigHandler;
+    sa.sa_handler = SigHandler01;
     sigemptyset(&sa.sa_mask);
     ret = sigaction(SIG, &sa, nullptr);
     LogPrintln("sigaction %d: %d", SIG, ret);
@@ -76,12 +76,12 @@ static int TimerTest(void)
     /* Create the timer */
     sev.sigev_notify = SIGEV_SIGNAL;
     sev.sigev_signo = SIG;
-    sev.sigev_value.sival_ptr = &timerid;
-    ret = timer_create(CLOCKID, &sev, &timerid);
-    LogPrintln("timer_create %p: %d", timerid, ret);
+    sev.sigev_value.sival_ptr = &timerid01;
+    ret = timer_create(CLOCKID, &sev, &timerid01);
+    LogPrintln("timer_create %p: %d", timerid01, ret);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
-    g_timerID = timerid;
+    g_timerID = timerid01;
 
     /* Start the timer */
     its.it_value.tv_sec = 0;
@@ -89,23 +89,39 @@ static int TimerTest(void)
     its.it_interval.tv_sec = its.it_value.tv_sec;
     its.it_interval.tv_nsec = its.it_value.tv_nsec;
 
-    ret = timer_settime(timerid, 0, &its, nullptr);
-    LogPrintln("timer_settime %p: %d", timerid, ret);
+    ret = timer_settime(timerid01, 0, &its, nullptr);
+    LogPrintln("timer_settime %p: %d", timerid01, ret);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
+
+    /* Test of evp is NULL */
+    ret = timer_create(CLOCKID, NULL, &timerid02);
+    LogPrintln("timer_settime %p: %d", timerid02, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    its.it_value.tv_sec = 1;
+    its.it_value.tv_nsec = 0;
+    its.it_interval.tv_sec = its.it_value.tv_sec;
+    its.it_interval.tv_nsec = its.it_value.tv_nsec;
+
+    ret = timer_settime(timerid02, 0, &its, nullptr);
+    LogPrintln("timer_settime %p: %d", timerid02, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    sleep(6);
     /* Sleep for a while */
     LogPrintln("sleep %ds", interval);
     sleep(interval); // timer signal is blocked, this sleep should not be interrupted
     ICUNIT_ASSERT_EQUAL(g_sigHdlCnt, 0, g_sigHdlCnt);
 
     /* Get the timer's time */
-    ret = timer_gettime(timerid, &its);
-    LogPrintln("timer_gettime %p: %d", timerid, ret);
+    ret = timer_gettime(timerid01, &its);
+    LogPrintln("timer_gettime %p: %d", timerid01, ret);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
     /* Get the timer's overruns */
-    ret = timer_getoverrun(timerid);
-    LogPrintln("timer_getoverrun %p: %d", timerid, ret);
+    ret = timer_getoverrun(timerid01);
+    LogPrintln("timer_getoverrun %p: %d", timerid01, ret);
     ICUNIT_ASSERT_NOT_EQUAL(ret, -1, ret); // before timer deliver, return value of timer_getoverrun is unspecified
 
     LogPrintln("unblock signal %d", SIG);
@@ -124,8 +140,12 @@ static int TimerTest(void)
     sleep(interval); // this sleep may be interrupted by the timer
     LogPrintln("sleep time over, g_sigHdlCnt = %d", g_sigHdlCnt);
 
-    ret = timer_delete(timerid);
-    LogPrintln("timer_delete %p %d", timerid, ret);
+    ret = timer_delete(timerid01);
+    LogPrintln("timer_delete %p %d", timerid01, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ret = timer_delete(timerid02);
+    LogPrintln("timer_delete %p %d", timerid02, ret);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
     ICUNIT_ASSERT_NOT_EQUAL(g_sigHdlCnt, 0, g_sigHdlCnt);

testsuites/unittest/time/timer/smoke/timer_test_005.cpp

+/*
+ * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
+ * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice, this list
+ * of conditions and the following disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <unistd.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+#include "osTest.h"
+#include <stdio.h>
+#include <string.h>
+#include "lt_timer_test.h"
+
+static int g_sigHdlCnt01;
+static int g_sigHdlCnt02;
+static int g_sigHdlCnt03;
+
+static void TempSigHandler(union sigval v)
+{
+    LogPrintln("This is TempSigHandler ...\r\n");
+    (*(void(*)(void))(v.sival_ptr))();
+}
+
+static void TempSigHandler01(void)
+{
+    g_sigHdlCnt01++;
+}
+
+static void TempSigHandler02(void)
+{
+    g_sigHdlCnt02++;
+}
+
+static int TimerTest(void)
+{
+    timer_t timerid01, timerid02, timerid03;
+    struct sigevent sev;
+    struct itimerspec its;
+    int ret;
+    int i;
+
+    (void)memset(&sev, 0, sizeof(struct sigevent));
+    sev.sigev_notify = SIGEV_THREAD;
+    sev.sigev_notify_function = TempSigHandler;
+    sev.sigev_value.sival_ptr = (void *)TempSigHandler01;
+
+    /* Start the timer */
+    its.it_value.tv_sec = 3; // 3, timer time 3 seconds.
+    its.it_value.tv_nsec = 0;
+    its.it_interval.tv_sec = its.it_value.tv_sec;
+    its.it_interval.tv_nsec = its.it_value.tv_nsec;
+    ret = timer_create(CLOCK_REALTIME, &sev, &timerid01);
+    LogPrintln("timer_settime %p: %d", timerid01, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ret = timer_settime(timerid01, 0, &its, nullptr);
+    LogPrintln("timer_create %p: %d", timerid01, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    its.it_value.tv_sec = 4; // 4, timer time 4 seconds.
+    its.it_value.tv_nsec = 0;
+    its.it_interval.tv_sec = its.it_value.tv_sec;
+    its.it_interval.tv_nsec = its.it_value.tv_nsec;
+
+    sev.sigev_value.sival_ptr = (void *)TempSigHandler02;
+    ret = timer_create(CLOCK_REALTIME, &sev, &timerid02);
+    LogPrintln("timer_settime %p: %d", timerid02, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ret = timer_settime(timerid02, 0, &its, nullptr);
+    LogPrintln("timer_settime %p: %d", timerid02, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    its.it_value.tv_sec = 5; // 5, timer time 5 seconds.
+    its.it_value.tv_nsec = 0;
+    its.it_interval.tv_sec = its.it_value.tv_sec;
+    its.it_interval.tv_nsec = its.it_value.tv_nsec;
+
+    sleep(20); // 20, sleep seconds for timer.
+    ret = timer_delete(timerid01);
+    LogPrintln("timer_delete %p %d", timerid01, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ret = timer_delete(timerid02);
+    LogPrintln("timer_delete %p %d", timerid02, ret);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ICUNIT_ASSERT_NOT_EQUAL(g_sigHdlCnt01, 0, g_sigHdlCnt01);
+    ICUNIT_ASSERT_NOT_EQUAL(g_sigHdlCnt02, 0, g_sigHdlCnt02);
+    return 0;
+
+}
+
+void TimerTest005(void)
+{
+    TEST_ADD_CASE(__FUNCTION__, TimerTest, TEST_POSIX, TEST_SWTMR, TEST_LEVEL0, TEST_FUNCTION);
+}

testsuites/unittest/time/timer/time_timer_test.cpp

@@ -86,5 +86,16 @@ HWTEST_F(TimeTimerTest, TimerTest003, TestSize.Level0)
 {
     TimerTest004(); // TODO: musl sigaction handler have only one param.
 }*/
+
+/* *
+ * @tc.name: TimerTest005
+ * @tc.desc: function for timer_create SIGEV_THREAD.
+ * @tc.type: FUNC
+ * @tc.require: AR000EEMQ9
+ */
+HWTEST_F(TimeTimerTest, TimerTest005, TestSize.Level0)
+{
+    TimerTest005();
+}
 #endif
 } // namespace OHOS