diff options
| -rw-r--r-- | src/corelib/tools/qhash.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/corelib/tools/qhash.h b/src/corelib/tools/qhash.h index b7d3a85e56..9b29429591 100644 --- a/src/corelib/tools/qhash.h +++ b/src/corelib/tools/qhash.h @@ -538,6 +538,14 @@ struct Data size_t nSpans; }; + constexpr qptrdiff MaxSpanCount = (std::numeric_limits<qptrdiff>::max)() / sizeof(Span); + constexpr size_t MaxBucketCount = MaxSpanCount << SpanConstants::SpanShift; + + if (numBuckets > MaxBucketCount) { + Q_CHECK_PTR(false); + Q_UNREACHABLE(); // no exceptions and no assertions -> no error reporting + } + size_t nSpans = numBuckets >> SpanConstants::SpanShift; return R{ new Span[nSpans], nSpans }; } |