From: Richard Purdie <richard.purdie@linuxfoundation.org>
Date: Fri, 31 Jan 2014 11:17:34 +0000 (+0000)
Subject: bitbake: runqueue: Fix race against tasks sharing stamp files
X-Git-Tag: rev_ivi_2015_02_04~9459
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0b3732d996131d6377e4ed5f6ee48e913ad15cfe;p=scm%2Fbb%2Ftizen-distro.git

bitbake: runqueue: Fix race against tasks sharing stamp files

Shared work directories work by assuming bitbake will not run
more than one task with a specific stamp name. Recent runqueue optimisations
accidentally broke this meaning there could be races. This fixes the code.

(Bitbake rev: b1628b1a260ddf43fc9985535b1ddcfcebbb1e5b)

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

diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 0475ee2..91b1f07 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -125,7 +125,10 @@ class RunQueueScheduler(object):
         if not self.buildable:
             return None
         if len(self.buildable) == 1:
-            return self.buildable[0]
+            taskid = self.buildable[0]
+            stamp = self.stamps[taskid]
+            if stamp not in self.rq.build_stamps.itervalues():
+                return taskid
 
         if not self.rev_prio_map:
             self.rev_prio_map = range(self.numTasks)