tree 23c8fd0f1090421f5c8561de77ef73427f533a48
parent 4024e1638c0f2a590d405366d0ddc1044dc43203
author leba <leba@google.com> 1583500322 -0800
committer Copybara-Service <copybara-worker@google.com> 1583500394 -0800

Address mem leak in NSOS in the case of changing config & target.

When we run blaze with NSOS, and alternating 2 different targets with 2 different configs (which clears the analysis cache), there's observable memory leak:
- The content of ArtifactnestedSetFunction#artifactToValueOrException is still retained
- NodeEntries of ArtifactNestedSetValue is retained, and in turn retains all the transitive ArtifactNestedSetKeys.

Changes:
- Clear the map in ArtifactNestedSetFunction when analysis cache is discarded when there's a change in config & target.
- Clear the Nodes of ArtifactNestedSetValue in Skyframe when analysis cache is discarded.

RELNOTES: None
PiperOrigin-RevId: 299332103