lib/oeqa: make it possible to restart the target

Tweak QemuRunner so we can actually restart the
qemu target in a test (if we want more memory for example).
Also add a restart method to the base test class so that tests
can use it.

(From OE-Core rev: 9de7fe11967576f4a8b24e653c6b9a02e5f6d85b)

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/oetest.py

@@ -81,6 +81,13 @@ class oeRuntimeTest(unittest.TestCase):
         else:
             return False
 
+    @classmethod
+    def restartTarget(self,params=None):
+
+        if oeRuntimeTest.tc.qemu.restart(params):
+            oeRuntimeTest.tc.target.host = oeRuntimeTest.tc.qemu.ip
+        else:
+            raise Exception("Restarting target failed")
 
 
 def getmodule(pos=2):

meta/lib/oeqa/utils/qemurunner.py

@@ -32,6 +32,10 @@ class QemuRunner:
         self.boottime = boottime
         self.runqemutime = runqemutime
 
+        self.create_socket()
+
+    def create_socket(self):
+
         self.bootlog = ''
         self.qemusock = None
 
@@ -137,21 +141,31 @@ class QemuRunner:
         return self.is_alive()
 
     def kill(self):
+
+        if self.runqemu:
+            bb.note("Sending SIGTERM to runqemu")
+            os.kill(-self.runqemu.pid,signal.SIGTERM)
+            endtime = time.time() + self.runqemutime
+            while self.runqemu.poll() is None and time.time() < endtime:
+                time.sleep(1)
+            if self.runqemu.poll() is None:
+                bb.note("Sending SIGKILL to runqemu")
+                os.kill(-self.runqemu.pid,signal.SIGKILL)
+            self.runqemu = None
         if self.server_socket:
             self.server_socket.close()
             self.server_socket = None
-        if self.runqemu.pid:
-            os.kill(-self.runqemu.pid,signal.SIGTERM)
-            os.kill(-self.runqemu.pid,signal.SIGKILL)
-            self.runqemu.pid = None
         self.qemupid = None
         self.ip = None
 
     def restart(self, qemuparams = None):
-        if self.is_alive():
+        bb.note("Restarting qemu process")
+        if self.runqemu.poll() is None:
             self.kill()
-        bb.note("Qemu Restart required...")
-        return self.launch(qemuparams)
+        self.create_socket()
+        if self.launch(qemuparams):
+            return True
+        return False
 
     def is_alive(self):
         qemu_child = self.find_child(str(self.runqemu.pid))