bk commit into 5.1 tree (knielsen:1.2593) BUG#35593

[knielsen]

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ChangeSet@stripped, 2008-03-27 12:01:11+01:00, knielsen@ymer.(none) +1 -0
  BUG#35593: Memory leak in failed NDB execute() with blobs.
  
  During NdbTransaction::execute() with blobs, the code keeps temporary
  lists of operations in local variables. In case of errors in the
  execute(), in some scenarios these lists of operations were not linked
  back into the transaction object, causing them to memory leak.

  storage/ndb/src/ndbapi/NdbTransaction.cpp@stripped, 2008-03-27 12:01:03+01:00,
knielsen@ymer.(none) +21 -0
    BUG#35593: Memory leak in failed NDB execute() with blobs.
    
    During NdbTransaction::execute() with blobs, the code keeps temporary
    lists of operations in local variables. In case of errors in the
    execute(), in some scenarios these lists of operations were not linked
    back into the transaction object, causing them to memory leak.

diff -Nrup a/storage/ndb/src/ndbapi/NdbTransaction.cpp
b/storage/ndb/src/ndbapi/NdbTransaction.cpp
--- a/storage/ndb/src/ndbapi/NdbTransaction.cpp	2008-02-19 16:00:27 +01:00
+++ b/storage/ndb/src/ndbapi/NdbTransaction.cpp	2008-03-27 12:01:03 +01:00
@@ -406,6 +406,27 @@ NdbTransaction::execute(ExecType aTypeOf
     {
       if(savedError.code==0)
 	savedError= theError;
+      /**
+       * We abort the execute here. But we still need to put the split-off
+       * operation list back into the transaction object, or we will get a
+       * memory leak.
+       */
+      if (firstSavedOp != NULL && lastSavedOp != NULL) {
+        DBUG_PRINT("info", ("Rejoining ops list after postExecute between "
+                            "%p and %p", theLastOpInList, firstSavedOp));
+        if (theFirstOpInList == NULL)
+          theFirstOpInList = firstSavedOp;
+        else
+          theLastOpInList->next(firstSavedOp);
+        theLastOpInList = lastSavedOp;
+      }
+      if (tCompletedFirstOp != NULL) {
+        tCompletedLastOp->next(theCompletedFirstOp);
+        theCompletedFirstOp = tCompletedFirstOp;
+        if (theCompletedLastOp == NULL)
+          theCompletedLastOp = tCompletedLastOp;
+      }
+
       DBUG_RETURN(-1);
     }