1771
91%

Ran 20 Oct 2023 09:26AM UTC

Jobs 2

Files 647

Run time 47s

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Committed 20 Oct 2023 08:58AM UTC coverage: 91.567% (-0.009%) from 91.576%

Build # 1771

Build Type

push

Evergreen

Committed by

web-flow

Commit Message

Fix blocked DB::open on multiprocess access on exFAT filesystem (#6959)

Fix double file lock and DB::open being blocked with multiple concurrent realm access on fat32/exfat file systems.

When file is truncated on fat32/exfat its uid is available for other files. With multiple processes opening and truncating the same set of files could lead to the situation when within one process get_unique_id will return the same value for different files in timing is right. This breaks proper initialization of static data for interprocess mutexes, so that subsequent locks will hang by trying to lock essentially the same file twice.

Run Details

94304 of 173552 branches covered (0.0%)

59 of 82 new or added lines in 5 files covered. (71.95%)

53 existing lines in 13 files now uncovered.

230544 of 251776 relevant lines covered (91.57%)

6594884.0 hits per line

New Missed Lines in Diff

Lines	Coverage	∆	File
4	97.2	-0.87%	test/test_file.cpp
4	79.77	-0.47%	test/util/test_path.cpp
15	89.4	-0.29%	test/test_shared.cpp

Uncovered Existing Lines

Lines	Coverage	∆	File
1	99.08	-0.02%	test/test_query2.cpp
1	79.77	-0.47%	test/util/test_path.cpp
2	80.87	-1.09%	src/realm/sync/network/http.hpp
2	81.25	-0.48%	src/realm/util/file.cpp
3	90.31	-0.38%	src/realm/query_engine.cpp
3	90.62	-0.29%	src/realm/util/serializer.cpp
3	47.95	1.47%	test/fuzz_group.cpp
4	93.43	-0.16%	src/realm/query_expression.hpp
4	54.12	-0.51%	test/util/compare_groups.cpp
5	92.75	-0.39%	src/realm/alloc_slab.cpp
5	70.21	-0.35%	src/realm/sync/instruction_applier.cpp
8	75.42	-0.14%	src/realm/sync/noinst/server/server.cpp
12	85.62	-0.54%	src/realm/sync/noinst/client_impl_base.cpp

Jobs

ID	Job ID	Ran	Files	Coverage
1	ubuntu-x86_64 - 1771.1	20 Oct 2023 10:21AM UTC	634	90.79
2	macos-arm64 - 1771.2	20 Oct 2023 10:21AM UTC	641	89.7

realm / realm-core / 1771
91%

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realm / realm-core / 1771 91%

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realm / realm-core / 1771
91%

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