Method dropPool

bolt/common/memory/Memory.cpp:408–421

  if (poolCount > kNumSystemPools) {
    return {ManagedPoolState::Kind::kHasOutstandingPools, poolCount, {}};
  }
  if (poolCount < kNumSystemPools) {
    return {
        ManagedPoolState::Kind::kInvalidSystemState,
        poolCount,
        "Unreachable code"};
  }

  int32_t spillPoolCount = 0;
  int32_t cachePoolCount = 0;
  int32_t tracePoolCount = 0;
  visitSystemRootChildren([&](MemoryPool* child) -> bool {
    if (child == spillPool_.get()) {
      ++spillPoolCount;
    }
    if (child == cachePool_.get()) {
      ++cachePoolCount;