How is the search for objects carried out, access to which is provided through the garbage collector roots?

Finding objects accessible through garbage collector (GC roots) is implemented by traversing the object graph starting from these roots. Roots are objects considered alive by default, for example:

• Local variables in the current thread's stack
• Static fields of classes
• Active JNI objects

Algorithm:

1. GC starts from the roots and marks them as alive.
2. Recursively traverses all objects referenced by marked objects.
3. All objects reachable from the roots are considered alive and are not deleted.
4. Objects unreachable from the roots are considered garbage and are subject to collection.

Thus, object search is a traversal of the reference graph from the roots with marking of reachable objects.