[7.2.0] Support profiling in an virtual thread. (#22375)

Cherry-pick commits: - 1077721 - 10e02a1
bazelbuild · May 15, 2024 · 084478b · 084478b
1 parent a98d588
commit 084478b
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diff --git a/src/main/java/com/google/devtools/build/lib/profiler/JsonTraceFileWriter.java b/src/main/java/com/google/devtools/build/lib/profiler/JsonTraceFileWriter.java
@@ -85,7 +85,9 @@ public void start() {
   }
 
   public void enqueue(TraceData data) {
-    if (!metadataPosted.get()) {
+    // We assign a virtual lane for virtual thread and the metadata for the virtual lane is posted
+    // at creation time.
+    if (!Thread.currentThread().isVirtual() && !metadataPosted.get()) {
       metadataPosted.set(Boolean.TRUE);
       queue.add(new ThreadMetadata());
     }