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Fix uninitialized memory usage

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After increasing the number of threads, the histories were not cleared,
resulting in uninitialized memory usage.

This patch fixes this by clearing threads histories in Thread c'tor as
is the idomatic way.

This fixes issue 1227

No functional change.
This commit is contained in:
Joost VandeVondele
2017-08-31 09:34:32 +02:00
committed by Marco Costalba
parent 7b4c9852e1
commit e385f194e9
4 changed files with 21 additions and 13 deletions
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14
src/search.cpp
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@@ -75,9 +75,6 @@ namespace {
int FutilityMoveCounts[2][16]; // [improving][depth]
int Reductions[2][2][64][64]; // [pv][improving][depth][moveNumber]
// Threshold used for countermoves based pruning
const int CounterMovePruneThreshold = 0;
template <bool PvNode> Depth reduction(bool i, Depth d, int mn) {
return Reductions[PvNode][i][std::min(d / ONE_PLY, 63)][std::min(mn, 63)] * ONE_PLY;
}
@@ -219,16 +216,7 @@ void Search::clear() {
TT.clear();
for (Thread* th : Threads)
{
th->counterMoves.fill(MOVE_NONE);
th->mainHistory.fill(0);
for (auto& to : th->contHistory)
for (auto& h : to)
h.fill(0);
th->contHistory[NO_PIECE][0].fill(CounterMovePruneThreshold - 1);
}
th->clear();
Threads.main()->callsCnt = 0;
Threads.main()->previousScore = VALUE_INFINITE;