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8367317: ZGC: ZVirtualMemoryReserver::force_reserve_discontiguous arithmetic underflow

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Reviewed-by: jsikstro, eosterlund
This commit is contained in:
Axel Boldt-Christmas 2025-11-10 05:53:55 +00:00
parent 66e5a68a33
commit a8b35bf5a6
1 changed files with 2 additions and 1 deletions
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3
src/hotspot/share/gc/z/zVirtualMemoryManager.cpp
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@ -100,9 +100,10 @@ size_t ZVirtualMemoryReserver::force_reserve_discontiguous(size_t size) {
if (reserve_contiguous(to_zoffset(reserve_start), reserve_size)) {
reserved += reserve_size;
end -= reserve_size;
}
end -= reserve_size * 2;
end -= MIN2(end, reserve_size);
}
// If (reserved < size) attempt to reserve the rest via normal divide and conquer