public void copyCollect(GcIntList roots, GcHeap sourceHeap, GcHeap targetHeap) {
if (sourceHeap.heapIndex == 0 || sourceHeap.isEmpty()) {
throw new IllegalStateException("invalid source heap #" + sourceHeap.heapIndex);
}
if (targetHeap.heapIndex == 0 || !targetHeap.isEmpty()) {
throw new IllegalStateException("invalid target heap #" + targetHeap.heapIndex);
}
this.sourceHeap = sourceHeap;
this.targetHeap = targetHeap;
this.flag = flag_provider.incrementAndGet();
for (int i = 0; i < roots.size(); i++) {
int newRoot = this.traceAndMarkAndRewritePointers(roots.get(i));
if (newRoot > 0) {
roots.set(i, newRoot);
}
}
sourceHeap.free();
}
