[posix-app] fix alarm issue (#3035)

.travis.yml

@@ -53,6 +53,9 @@ matrix:
     - env: BUILD_TARGET="posix-app-ncp" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: gcc
+    - env: BUILD_TARGET="posix-app-pty" VERBOSE=1
+      os: linux
+      compiler: gcc
     - env: BUILD_TARGET="android-build" VERBOSE=1
       language: android
       android:

.travis/before_install.sh

@@ -57,6 +57,10 @@ cd /tmp || die
         clang-format --version || die
     }
 
+    [ $BUILD_TARGET != posix-app-pty ] || {
+        sudo apt-get install socat expect || die
+    }
+
     [ $BUILD_TARGET != scan-build ] || {
         sudo apt-get install clang || die
     }

.travis/script.sh

@@ -547,6 +547,52 @@ set -x
     PYTHONUNBUFFERED=1 OT_CLI_PATH="$(pwd)/$(ls output/posix/*/bin/ot-cli)" RADIO_DEVICE="$(pwd)/$(ls output/*/bin/ot-ncp-radio)" COVERAGE=1 make -f src/posix/Makefile-posix check || die
 }
 
+[ $BUILD_TARGET != posix-app-pty ] || {
+    ./bootstrap
+    make -f examples/Makefile-posix
+    make -f src/posix/Makefile-posix
+
+    SOCAT_OUTPUT=/tmp/ot-socat
+    socat -d -d pty,raw,echo=0 pty,raw,echo=0 > /dev/null 2> $SOCAT_OUTPUT &
+    while true; do
+        if test $(head -n2 $SOCAT_OUTPUT | wc -l) = 2; then
+            RADIO_PTY=$(head -n1 $SOCAT_OUTPUT | grep -o '/dev/.\+')
+            CORE_PTY=$(head -n2 $SOCAT_OUTPUT | tail -n1 | grep -o '/dev/.\+')
+            break
+        fi
+        echo 'Waiting for socat ready...'
+        sleep 1
+    done
+    echo 'RADIO_PTY' $DEVICE_PTY
+    echo 'CORE_PTY' $CORE_PTY
+
+    RADIO_NCP_PATH="$(pwd)/$(ls output/*linux*/bin/ot-ncp-radio)"
+    $RADIO_NCP_PATH 1 > $RADIO_PTY < $RADIO_PTY &
+    OT_CLI_PATH="$(pwd)/$(ls output/posix/*linux*/bin/ot-cli)"
+
+    expect <<EOF || die
+spawn $OT_CLI_PATH $CORE_PTY -echo
+set timeout 2
+send "panid 0xface\r\n"
+expect "Done"
+send "ifconfig up\r\n"
+expect "Done"
+send "thread start\r\n"
+expect "Done"
+sleep 5
+send "state\r\n"
+expect {
+    "leader" {
+        send "exit\r\n"
+        expect eof
+    }
+    timeout abort
+}
+send_user "Success"
+EOF
+    killall socat
+}
+
 [ $BUILD_TARGET != posix-mtd ] || {
     ./bootstrap || die
     COVERAGE=1 CFLAGS=-m32 CXXFLAGS=-m32 LDFLAGS=-m32 USE_MTD=1 make -f examples/Makefile-posix check || die

src/posix/platform/alarm.c

@@ -106,17 +106,14 @@ void otPlatAlarmMicroStop(otInstance *aInstance)
 
 void platformAlarmUpdateTimeout(struct timeval *aTimeout)
 {
-    int32_t        usRemaining = INT32_MAX;
-    int32_t        msRemaining = INT32_MAX;
-    struct timeval now;
+    int32_t usRemaining = INT32_MAX;
+    int32_t msRemaining = INT32_MAX;
 
     if (aTimeout == NULL)
     {
         return;
     }
 
-    otSysGetTime(&now);
-
     if (sIsUsRunning)
     {
         usRemaining = (int64_t)(sUsAlarm - otPlatAlarmMicroGetNow());
@@ -124,6 +121,10 @@ void platformAlarmUpdateTimeout(struct timeval *aTimeout)
 
     if (sIsMsRunning)
     {
+        struct timeval now;
+
+        otSysGetTime(&now);
+        timersub(&now, &sStart, &now);
         msRemaining = (int64_t)sMsAlarm * US_PER_MS - now.tv_sec * US_PER_S - now.tv_usec;
     }