[oe-commits] [bitbake] 07/07: persist_data.py: Immediately get exclusive lock in __setitem__
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Sun Jan 19 13:32:57 UTC 2020
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rpurdie pushed a commit to branch master
in repository bitbake.
commit feb43e7c30f5bfab75d718896c45df621810d06f
Author: Chris Laplante <chris.laplante at agilent.com>
AuthorDate: Thu Jan 16 11:28:05 2020 -0500
persist_data.py: Immediately get exclusive lock in __setitem__
To avoid races, SQLTable::__setitem__ needs an exclusive lock for the
entire transaction, not just the INSERT/UPDATE part.
Signed-off-by: Chris Laplante <chris.laplante at agilent.com>
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
lib/bb/persist_data.py | 3 +++
1 file changed, 3 insertions(+)
diff --git a/lib/bb/persist_data.py b/lib/bb/persist_data.py
index de8f87a..7357ab2 100644
--- a/lib/bb/persist_data.py
+++ b/lib/bb/persist_data.py
@@ -179,6 +179,9 @@ class SQLTable(collections.MutableMapping):
elif not isinstance(value, str):
raise TypeError('Only string values are supported')
+ # Ensure the entire transaction (including SELECT) executes under write lock
+ cursor.execute("BEGIN EXCLUSIVE")
+
cursor.execute("SELECT * from %s where key=?;" % self.table, [key])
row = cursor.fetchone()
if row is not None:
--
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