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Fix a possible overflow in TT resize

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On platforms where size_t is 32 bit, we
can have an overflow in this expression:

(mbSize * 1024 * 1024)

Fix it setting max hash size of 2GB on platforms
where size_t is 32 bit.

A small rename while there: now struct Cluster
is definied inside class TranspositionTable so
we should drop the redundant TT prefix.

No functional change.
This commit is contained in:
Marco Costalba
2015-01-17 09:04:25 +01:00
parent 58fdb84b0d
commit 595fc342cf
3 changed files with 10 additions and 8 deletions
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4
src/ucioption.cpp
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@@ -54,11 +54,13 @@ bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const
void init(OptionsMap& o) {
const int MaxHashMB = Is64Bit ? 1024 * 1024 : 2048;
o["Write Debug Log"] << Option(false, on_logger);
o["Contempt"] << Option(0, -100, 100);
o["Min Split Depth"] << Option(0, 0, 12, on_threads);
o["Threads"] << Option(1, 1, MAX_THREADS, on_threads);
o["Hash"] << Option(16, 1, 1024 * 1024, on_hash_size);
o["Hash"] << Option(16, 1, MaxHashMB, on_hash_size);
o["Clear Hash"] << Option(on_clear_hash);
o["Ponder"] << Option(true);
o["MultiPV"] << Option(1, 1, 500);