The CDS static dump calls os::init_random(0x12345678). This modifies a global state and may affect the behavior of other VM components in subtle ways.

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https://github.com/openjdk/jdk/blob/2063bb8ffabd6096f547ec6da979cfcf68a56ba3/src/hotspot/share/cds/metaspaceShared.cpp#L499-L517

void VM_PopulateDumpSharedSpace::doit() {
  ...
  // Initialize random for updating the hash of symbols
  os::init_random(0x12345678);

https://github.com/openjdk/jdk/blob/2063bb8ffabd6096f547ec6da979cfcf68a56ba3/src/hotspot/share/oops/symbol.cpp#L75-L81

void Symbol::update_identity_hash() {
  // This is called at a safepoint during dumping of a static CDS archive. The caller should have
  // called os::init_random() with a deterministic seed and then iterate all archived Symbols in
  // a deterministic order.
  assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
  _hash_and_refcount = pack_hash_and_refcount((short)os::random(), PERM_REFCOUNT);
}
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Proposal:

All CDS needs is a deterministic sequence of random numbers to be used by Symbol::update_identity_hash(). We can copy the logic in os::random() but maintain our own seed. Also, this is called in a single thread so no cmpxchg is needed:

int os::random() {
  // Make updating the random seed thread safe.
  while (true) {
    unsigned int seed = _rand_seed;
    unsigned int rand = next_random(seed);
    if (Atomic::cmpxchg(&_rand_seed, seed, rand, memory_order_relaxed) == seed) {
      return static_cast<int>(rand);
    }
  }
}

static unsigned int _cds_symbol_seed = 0x12345678;
int cds_symbol_random() {
  _cds_symbol_seed = os::next_random(_cds_symbol_seed);
  return static_cast<int>(_cds_symbol_seed);
}