postgres.git / summary / log / commit / refs

commit    d9b3bc55201a185e6a9fb37f703592efde69c6e2
Author:   Teodor Sigaev <teodor@sigaev.ru>
Date:     Thu May 03 17:09:28 2018 +0000
First released in: 11.0, 9.3.23, 9.4.18, 9.5.13, 9.6.9, 10.4

    Add HOLD_INTERRUPTS section into FinishPreparedTransaction.
    
    If an interrupt arrives in the middle of FinishPreparedTransaction
    and any callback decide to call CHECK_FOR_INTERRUPTS (e.g.
    RemoveTwoPhaseFile can write a warning with ereport, which checks for
    interrupts) then it's possible to leave current GXact undeleted.
    
    Backpatch to all supported branches
    
    Stas Kelvich
    
    Discussion: ihttps://www.postgresql.org/message-id/3AD85097-A3F3-4EBA-99BD-C38EDF8D2949@postgrespro.ru


 src/backend/access/transam/twophase.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c
index 88fa270fe3c..cdd0091a5f0 100644
--- a/src/backend/access/transam/twophase.c
+++ b/src/backend/access/transam/twophase.c
@@ -1377,6 +1377,9 @@ FinishPreparedTransaction(const char *gid, bool isCommit)
 	/* compute latestXid among all children */
 	latestXid = TransactionIdLatest(xid, hdr->nsubxacts, children);
 
+	/* Prevent cancel/die interrupt while cleaning up */
+	HOLD_INTERRUPTS();
+
 	/*
 	 * The order of operations here is critical: make the XLOG entry for
 	 * commit or abort, then mark the transaction committed or aborted in
@@ -1465,6 +1468,8 @@ FinishPreparedTransaction(const char *gid, bool isCommit)
 	RemoveGXact(gxact);
 	MyLockedGxact = NULL;
 
+	RESUME_INTERRUPTS();
+
 	pfree(buf);
 }
 


[parent: eab8d6312f15]