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Avoid leaking extents / VM when split is not supported.

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This can only happen on Windows and with opt.retain disabled (which isn't the
default).  The solution is suboptimal, however not a common case as retain is
the long term plan for all platforms anyway.
This commit is contained in:
Qi Wang 2019-07-15 12:16:02 -07:00 committed by Qi Wang
parent badf8d95f1
commit 57dbab5d6b
1 changed files with 11 additions and 0 deletions
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11
src/extent.c
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@ -1052,6 +1052,17 @@ extent_recycle_split(tsdn_t *tsdn, arena_t *arena,
&to_leak, &to_salvage, new_addr, size, pad, alignment, slab, szind, &to_leak, &to_salvage, new_addr, size, pad, alignment, slab, szind,
growing_retained); growing_retained);
if (!maps_coalesce && result != extent_split_interior_ok
&& !opt_retain) {
/*
* Split isn't supported (implies Windows w/o retain). Avoid
* leaking the extents.
*/
assert(to_leak != NULL && lead == NULL && trail == NULL);
extent_deactivate(tsdn, arena, extents, to_leak);
return NULL;
}
if (result == extent_split_interior_ok) { if (result == extent_split_interior_ok) {
if (lead != NULL) { if (lead != NULL) {
extent_deactivate(tsdn, arena, extents, lead); extent_deactivate(tsdn, arena, extents, lead);