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Add defense for builtin_clz/builtin_ctz in case that input is zero

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This commit is contained in:
obdev
2021-07-18 15:24:13 +08:00
committed by wangzelin.wzl
parent 3a6db0a542
commit 4770dbcdcb
9 changed files with 14 additions and 8 deletions
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7
src/storage/ob_handle_cache.h
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@ -19,11 +19,6 @@
namespace oceanbase {
namespace storage {
constexpr int64_t next_pow2(const int64_t x)
{
return x ? (1ULL << (8 * sizeof(int64_t) - __builtin_clzll(x - 1))) : 1;
}
template <typename Key, typename Handle>
class ObHandleCacheNode : public common::ObDLinkBase<ObHandleCacheNode<Key, Handle>> {
public:
@ -125,7 +120,7 @@ public:
}
private:
static const uint64_t BUCKET_SIZE = next_pow2(N * 2);
static const uint64_t BUCKET_SIZE = common::next_pow2(N * 2);
static const uint64_t MASK = BUCKET_SIZE - 1;
CacheNode nodes_[N];
int16_t buckets_[BUCKET_SIZE];