389
77%

Ran 26 Feb 2018 09:00PM UTC

Jobs 1

Files 36

Run time 3s

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Build # 389

Build Type

push

travis-ci

Committed by

ivmai

Commit Message

Avoid potential race when accessing size_map table

There is again a data race between GC_extend_size_map and GC_size_map[]
readers, though it is again not likely to fail in practice.

It is feasible to just move all of the GC_size_map accesses under the
lock, and this does not look to incur a substantial penalty.

* gcj_mlc.c (GC_gcj_malloc, GC_gcj_malloc_ignore_off_page): Move
lg=GC_size_map[lb] to be right after LOCK() instead of preceding it.
* malloc.c (GC_malloc_kind_global, GC_generic_malloc_uncollectable):
Likewise.
* typd_mlc.c (GC_malloc_explicitly_typed_ignore_off_page): Likewise.
* include/gc.h (GC_get_size_map_at): Update comment to note that the
client should use synchronization when calling the function.
* include/private/gc_priv.h (_GC_arrays._size_map): Add comment about
synchronization.

Run Details

5148 of 7431 relevant lines covered (69.28%)

1348656.16 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
28	389.28 (CONF_OPTIONS="--enable-gcov --enable-handle-fork --enable-munmap --enable-single-obj-compilation --enable-cplusplus --disable-shared --enable-gc-assertions" CFLAGS_EXTRA="-D USE_CUSTOM_SPECIFIC" REPORT_COVERAGE=true)	26 Feb 2018 09:00PM UTC	0	69.28	Travis Job 389.28

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