4 ms·

The GC will not update a pointer once it is converted to the type uintptr. It becomes invisible to the precise collector, so the uintptr acts as an id value.

• pjmlp 12y ago
  Worse, it might be collected then as the collector might think it is no longer in use.
  • ianlancetaylor 12y ago
    But it's in the map, so it's in use.
    • pjmlp 12y ago
      This remark is what triggered my comment > It becomes invisible to the precise collector So does the conversion to uintptr remove it from the root lists the GC searches?
      • crawshaw 12y ago
        It's a map[uintptr]unsafe.Pointer. The key is invisible to the collector, but the value is an unsafe.Pointer, which is will be managed for you by the precise collector.
        • pjmlp 12y ago
          Ah, stupid me! Thanks for clarifying it.