Race on late initializing crash tracking results JVM to crash

Author: zhengyu123

dd-java-agent/agent-bootstrap/src/main/java/datadog/trace/bootstrap/Agent.java

@@ -63,6 +63,7 @@
 import java.net.MalformedURLException;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.ByteBuffer;
 import java.security.CodeSource;
 import java.util.EnumSet;
 import java.util.concurrent.TimeUnit;
@@ -795,6 +796,11 @@ private static void startCrashTracking() {
       if (forceEarlyStart) {
         initializeCrashTrackingDefault();
       } else {
+        // To workaround JDK-8345810, we want to initialize nio early,
+        // which has dependence on libpthread. Creating a small nio ByteBuffer
+        // to force nio initialization.
+        ByteBuffer buffer = ByteBuffer.allocate(1);
+
         AgentTaskScheduler.get().execute(Agent::initializeCrashTrackingDefault);
       }
     } else {