I was just trying to revive lousyjack, my valgrind buildfarm animal
which has been offline for 12 days, after having upgraded the machine
(fedora 31, gcc 9.3.1, valgrind 3.15) and noticed lots of errors like this:
2020-04-17 19:26:03.483 EDT [63741:3] pg_regress LOG: statement: CREATE
DATABASE "regression" TEMPLATE=template0
==63717== VALGRINDERROR-BEGIN
==63717== Use of uninitialised value of size 8
==63717== at 0xAC5BB5: pg_comp_crc32c_sb8 (pg_crc32c_sb8.c:82)
==63717== by 0x55A98B: XLogRecordAssemble (xloginsert.c:785)
==63717== by 0x55A268: XLogInsert (xloginsert.c:461)
==63717== by 0x8BC9E0: LogCurrentRunningXacts (standby.c:1005)
==63717== by 0x8BC8F9: LogStandbySnapshot (standby.c:961)
==63717== by 0x550CB3: CreateCheckPoint (xlog.c:8937)
==63717== by 0x82A3B2: CheckpointerMain (checkpointer.c:441)
==63717== by 0x56347D: AuxiliaryProcessMain (bootstrap.c:453)
==63717== by 0x83CA18: StartChildProcess (postmaster.c:5474)
==63717== by 0x83A120: reaper (postmaster.c:3045)
==63717== by 0x4874B1F: ??? (in /usr/lib64/libpthread-2.30.so)
==63717== by 0x5056F29: select (in /usr/lib64/libc-2.30.so)
==63717== by 0x8380A0: ServerLoop (postmaster.c:1691)
==63717== by 0x837A1F: PostmasterMain (postmaster.c:1400)
==63717== by 0x74A71D: main (main.c:210)
==63717== Uninitialised value was created by a stack allocation
==63717== at 0x8BC942: LogCurrentRunningXacts (standby.c:984)
==63717==
==63717== VALGRINDERROR-END
{
<insert_a_suppression_name_here>
Memcheck:Value8
fun:pg_comp_crc32c_sb8
fun:XLogRecordAssemble
fun:XLogInsert
fun:LogCurrentRunningXacts
fun:LogStandbySnapshot
fun:CreateCheckPoint
fun:CheckpointerMain
fun:AuxiliaryProcessMain
fun:StartChildProcess
fun:reaper
obj:/usr/lib64/libpthread-2.30.so
fun:select
fun:ServerLoop
fun:PostmasterMain
fun:main
}
I can't see what the problem is immediately.
cheers
andrew
--
Andrew Dunstan https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
