add a bunch of print statements

src/main/java/com/google/devtools/build/lib/bazel/repository/starlark/RepoFetchingSkyKeyComputeState.java

@@ -83,8 +83,10 @@ class RepoFetchingSkyKeyComputeState implements SkyKeyComputeState {
    * new map on each restart, so we can't simply plumb that in.
    */
   final Map<RepoRecordedInput, String> recordedInputValues = new TreeMap<>();
+  private final String repoName;
 
   RepoFetchingSkyKeyComputeState(String repoName) {
+    this.repoName = repoName;
     workerExecutorService =
         MoreExecutors.listeningDecorator(
             Executors.newThreadPerTaskExecutor(
@@ -114,10 +116,12 @@ synchronized void startWorker(Callable<RepositoryDirectoryValue.Builder> c) {
   // high-memory-pressure listener thread.
   @Override
   public synchronized void close() {
+    System.out.println("WYVDEBUG -- closing state: " + repoName);
     if (workerFuture != null) {
       workerFuture.cancel(true);
     }
     workerFuture = null;
     workerExecutorService.close(); // This blocks
+    System.out.println("WYVDEBUG -- closed state: " + repoName);
   }
 }

src/main/java/com/google/devtools/build/lib/bazel/repository/starlark/StarlarkRepositoryFunction.java

@@ -143,6 +143,7 @@ public RepositoryDirectoryValue.Builder fetch(
     }
     // See below (the `catch CancellationException` clause) for why there's a `while` loop here.
     while (true) {
+      System.out.println("WYVDEBUG -- about to get new state: " + rule.getName());
       var state = env.getState(() -> new RepoFetchingSkyKeyComputeState(rule.getName()));
       boolean shouldShutDownWorkerExecutorInFinally = true;
       try {
@@ -195,7 +196,9 @@ public RepositoryDirectoryValue.Builder fetch(
           // our knowledge, and 2) if the SkyFunction is re-entered for any reason (for example
           // b/330892334 and https://github.com/bazelbuild/bazel/issues/21238), we don't have
           // lingering state messing things up.
+          System.out.println("WYVDEBUG -- before finally clearState: " + rule.getName());
           env.clearState();
+          System.out.println("WYVDEBUG -- after finally clearState: " + rule.getName());
         }
       }
     }

src/main/java/com/google/devtools/build/lib/skyframe/HighWaterMarkLimiter.java

@@ -24,6 +24,7 @@
 import com.google.devtools.build.lib.runtime.MemoryPressureOptions;
 import com.google.devtools.build.lib.runtime.MemoryPressureStatCollector;
 import com.google.devtools.build.lib.vfs.SyscallCache;
+import java.text.NumberFormat;
 
 /**
  * Drops unnecessary temporary state in response to memory pressure.
@@ -95,6 +96,14 @@ void handle(MemoryPressureEvent event) {
           actual, threshold, remainingStat);
     }
 
+    System.out.println(
+        "WYVDEBUG -- DROPPING STATE! "
+            + NumberFormat.getInstance().format(event.tenuredSpaceUsedBytes())
+            + "B used, "
+            + NumberFormat.getInstance().format(event.tenuredSpaceMaxBytes())
+            + "B max ("
+            + actual
+            + "%)");
     skyframeExecutor.dropUnnecessaryTemporarySkyframeState();
     syscallCache.clear();
   }