move the blackhole closer to the init

amarziali · amarziali · commit fb3fbd761186 · 2026-01-07T14:42:51.000+01:00
diff --git a/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/servicediscovery/MemFDUnixWriterJNA.java b/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/servicediscovery/MemFDUnixWriterJNA.java
@@ -5,9 +5,12 @@
 import com.sun.jna.Native;
 import com.sun.jna.NativeLong;
 import com.sun.jna.Pointer;
+import datadog.trace.api.GlobalTracer;
+import datadog.trace.api.Tracer;
+import datadog.trace.context.TraceScope;
 
 public final class MemFDUnixWriterJNA extends MemFDUnixWriter {
-  private final LibC libc = Native.load("c", LibC.class);
+  private final LibC libc;
 
   private interface LibC extends Library {
     long syscall(long number, Object... args);
@@ -17,6 +20,14 @@ private interface LibC extends Library {
     int fcntl(int fd, int cmd, int arg);
   }
 
+  public MemFDUnixWriterJNA() {
+    final Tracer tracer = GlobalTracer.get();
+    // JNA initialisation can do ldconfig and other commands. Those are hidden since internal.
+    try (TraceScope closeme = tracer != null ? tracer.muteTracing() : null) {
+      libc = Native.load("c", LibC.class);
+    }
+  }
+
   @Override
   protected long syscall(long number, String name, int flags) {
     return libc.syscall(number, name, flags);
diff --git a/dd-trace-core/src/main/java/datadog/trace/core/servicediscovery/ForeignMemoryWriterFactory.java b/dd-trace-core/src/main/java/datadog/trace/core/servicediscovery/ForeignMemoryWriterFactory.java
@@ -5,9 +5,6 @@
 import datadog.environment.JavaVirtualMachine;
 import datadog.environment.OperatingSystem;
 import datadog.environment.SystemProperties;
-import datadog.trace.api.GlobalTracer;
-import datadog.trace.api.Tracer;
-import datadog.trace.context.TraceScope;
 import de.thetaphi.forbiddenapis.SuppressForbidden;
 import java.util.function.Supplier;
 import org.slf4j.Logger;
@@ -28,9 +25,7 @@ public ForeignMemoryWriter get() {
 
   @SuppressForbidden // intentional Class.forName to force loading
   private ForeignMemoryWriter createForLinux() {
-    final Tracer tracer = GlobalTracer.get();
-    // JNA initialisation can do ldconfig and other commands. Those are hidden since internal.
-    try (TraceScope closeme = tracer != null ? tracer.muteTracing() : null) {
+    try {
       // first check if the arch is supported
       if (OperatingSystem.architecture() == OperatingSystem.Architecture.UNKNOWN) {
         log.debug(
