[Draft] MSAN errors in galera self test

buildbot@5a413d784da2:/build$ for a in galerautils/tests/*; do echo ====$a LD_LIBRARY_PATH=/msan-libs/ $a; echo ; done

====galerautils/tests/avalanche

0.4984 : 0.5016 (delta: 0.0033)

====galerautils/tests/crc32c_bench

 INFO: CRC-32C: using 64-bit x86 acceleration.

Impl:   	Bytes:	Duration:	Result:

GU Sarwate 	11	2.060937	1417414422

GU Slicing4	11	1.536055	1417414422

GU Slicing8	11	1.633976	1417414422

GU x86_32  	11	0.688337	1417414422

GU x86_64  	11	1.239802	1417414422

Impl:   	Bytes:	Duration:	Result:

GU Sarwate 	31	3.148643	1123117257

GU Slicing4	31	1.684383	1123117257

GU Slicing8	31	1.695324	1123117257

GU x86_32  	31	0.470256	1123117257

GU x86_64  	31	0.702188	1123117257

Impl:   	Bytes:	Duration:	Result:

GU Sarwate 	64	3.059854	2651450193

GU Slicing4	64	1.595656	2651450193

GU Slicing8	64	1.597852	2651450193

GU x86_32  	64	0.348857	2651450193

GU x86_64  	64	0.398240	2651450193

Impl:   	Bytes:	Duration:	Result:

GU Sarwate 	512	2.979523	1036845834

GU Slicing4	512	1.460025	1036845834

GU Slicing8	512	1.482042	1036845834

GU x86_32  	512	0.312467	1036845834

GU x86_64  	512	0.156672	1036845834

Impl:   	Bytes:	Duration:	Result:

GU Sarwate 	1048576	3.299353	3110145204

GU Slicing4	1048576	1.525782	3110145204

GU Slicing8	1048576	1.444520	3110145204

GU x86_32  	1048576	0.289053	3110145204

GU x86_64  	1048576	0.158909	3110145204

====galerautils/tests/deqmap_bench

Running with parameters: container type = deq, max power = 0, base loops = 1

Power: 0

Loops(1):MemorySanitizer:DEADLYSIGNAL

==1601==ERROR: MemorySanitizer: stack-overflow on address 0x7ffd389f5ea0 (pc 0x55e78256cc33 bp 0x7ffd389f66d0 sp 0x7ffd389f5ea0 T1601)

MemorySanitizer:DEADLYSIGNAL

MemorySanitizer: nested bug in the same thread, aborting.

====galerautils/tests/gu_tests

Running suite(s): Galera memory utils

Uninitialized bytes in fwrite at offset 0 inside [0x7010000000e0, 8)

==1603==WARNING: MemorySanitizer: use-of-uninitialized-value

    #0 0x55a5a2acdc61 in ppack (/build/galerautils/tests/gu_tests+0xe8c61) (BuildId: f93292c070637881a9469726f6bc6263c25430aa)

    #1 0x55a5a2acd2bf in send_ctx_info (/build/galerautils/tests/gu_tests+0xe82bf) (BuildId: f93292c070637881a9469726f6bc6263c25430aa)

    #2 0x55a5a2ace356 in srunner_run_setup check_run.o

    #3 0x55a5a2aceaf9 in srunner_run_tagged (/build/galerautils/tests/gu_tests+0xe9af9) (BuildId: f93292c070637881a9469726f6bc6263c25430aa)

    #4 0x55a5a2ab2fd2 in main /source/galerautils/tests/gu_tests.c:69:7

    #5 0x7f218f6ad249  (/lib/x86_64-linux-gnu/libc.so.6+0x27249) (BuildId: c047672cae7964324658491e7dee26748ae5d2f8)

    #6 0x7f218f6ad304 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27304) (BuildId: c047672cae7964324658491e7dee26748ae5d2f8)

    #7 0x55a5a2a1b5a0 in _start (/build/galerautils/tests/gu_tests+0x365a0) (BuildId: f93292c070637881a9469726f6bc6263c25430aa)

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/build/galerautils/tests/gu_tests+0xe8c61) (BuildId: f93292c070637881a9469726f6bc6263c25430aa) in ppack

Exiting

../../src/check_msg.c:133: Error in call to punpack

====galerautils/tests/gu_tests++

Running suite(s): gu::Atomic

Uninitialized bytes in fwrite at offset 0 inside [0x7010000011c0, 8)

MemorySanitizer:DEADLYSIGNAL

==1606==ERROR: MemorySanitizer: stack-overflow on address 0x7ffc61f599d8 (pc 0x55599b77f707 bp 0x7ffc61f5a220 sp 0x7ffc61f599e0 T1606)

MemorySanitizer:DEADLYSIGNAL

MemorySanitizer: nested bug in the same thread, aborting.

../../src/check_msg.c:133: Error in call to punpack

====galerautils/tests/gu_to_test

Starting with 16 threads and 1048576 maximum seqno.

Created TO monitor of length 64

1048576 seqnos in 12.171 seconds (86156.575 seqno/sec)

Overhead at 10000 actions/second: 11.61%

Grabbed:           735147

Failed:            247899

Self-cancelled:     65530

Canceled:          293380 (can exceed total number of seqnos)

#17360 0x000055974a09771f in __msan::PrintWarningWithOrigin(unsigned long, unsigned long, unsigned int) ()

#17361 0x000055974a0aeb80 in __interceptor_fwrite ()

#17362 0x000055974a309e62 in ppack ()

#17363 0x000055974a3094c0 in send_ctx_info ()

#17364 0x000055974a308807 in tcase_fn_start ()

#17365 0x000055974a30a827 in tcase_run_tfun_nofork ()

#17366 0x000055974a30ade2 in srunner_run_tagged ()

#17367 0x000055974a213279 in main (argc=<optimized out>, argv=<optimized out>) at /source/galerautils/tests/gu_tests++.cpp:36

(rr) quit

A debugging session is active.

	Inferior 1 [process 902] will be detached.

buildbot@7c7dc7f8ebca:/build$ LD_LIBRARY_PATH=/msan-libs/ rr record galerautils/tests/gu_tests++ nofork