oeqa/qemurunner: Clean up failure handling

If you fail to setup the tap devices, runqemu will error quickly
however stdout/stderr are not shown to the user, instead a SystemExit
traceback is shown. This could explain some long since unexplained
failures on the autobuilder.

Rework the error handling so SystemExit isn't used and the
standard log failure messages can be shown. The code could
likely ultimatley need some restructuring to work effectively.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/meta/lib/oeqa/utils/qemurunner.py b/meta/lib/oeqa/utils/qemurunner.py
index 7d9b36f811..4b74337652 100644
--- a/meta/lib/oeqa/utils/qemurunner.py
+++ b/meta/lib/oeqa/utils/qemurunner.py
@@ -36,6 +36,7 @@ class QemuRunner:
 
         # Popen object for runqemu
         self.runqemu = None
+        self.runqemu_exited = False
         # pid of the qemu process that runqemu will start
         self.qemupid = None
         # target ip - from the command line or runqemu output
@@ -125,7 +126,6 @@ class QemuRunner:
                 self.logger.error('Output from runqemu:\n%s' % self.getOutput(self.runqemu.stdout))
                 self.stop()
                 self._dump_host()
-                raise SystemExit
 
     def start(self, qemuparams = None, get_ip = True, extra_bootparams = None, runqemuparams='', launch_cmd=None, discard_writes=True):
         env = os.environ.copy()
@@ -235,6 +235,8 @@ class QemuRunner:
         endtime = time.time() + self.runqemutime
         while not self.is_alive() and time.time() < endtime:
             if self.runqemu.poll():
+                if self.runqemu_exited:
+                    return False
                 if self.runqemu.returncode:
                     # No point waiting any longer
                     self.logger.warning('runqemu exited with code %d' % self.runqemu.returncode)
@@ -244,6 +246,9 @@ class QemuRunner:
                     return False
             time.sleep(0.5)
 
+        if self.runqemu_exited:
+            return False
+
         if not self.is_alive():
             self.logger.error("Qemu pid didn't appear in %s seconds (%s)" %
                               (self.runqemutime, time.strftime("%D %H:%M:%S")))
@@ -419,7 +424,7 @@ class QemuRunner:
                 os.killpg(os.getpgid(self.runqemu.pid), signal.SIGKILL)
             self.runqemu.stdin.close()
             self.runqemu.stdout.close()
-            self.runqemu = None
+            self.runqemu_exited = True
 
         if hasattr(self, 'server_socket') and self.server_socket:
             self.server_socket.close()
@@ -460,7 +465,7 @@ class QemuRunner:
         return False
 
     def is_alive(self):
-        if not self.runqemu or self.runqemu.poll() is not None:
+        if not self.runqemu or self.runqemu.poll() is not None or self.runqemu_exited:
             return False
         if os.path.isfile(self.qemu_pidfile):
             # when handling pidfile, qemu creates the file, stat it, lock it and then write to it