fix: skip SupportOnlyLoadTest on J9 — libJavaSupport crashes at shutdown

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: jbachorik

ddprof-test/src/test/java/com/datadoghq/profiler/SupportOnlyLoadTest.java

@@ -11,12 +11,18 @@
 
 /**
  * Verifies that {@link JVMAccess} loads only libJavaSupport.so and does NOT load libjavaProfiler.so.
+ * Skipped on J9/Zing — libJavaSupport relies on HotSpot vmstructs; loading it on J9 can
+ * trigger an abort during JVM shutdown.
  */
 class SupportOnlyLoadTest {
 
     @Test
     @EnabledOnOs(OS.LINUX)
     void jvmAccessDoesNotLoadProfilerLibrary() throws Exception {
+        // libJavaSupport.so depends on HotSpot vmstructs; loading it on J9 crashes at shutdown.
+        org.junit.jupiter.api.Assumptions.assumeFalse(Platform.isJ9(),
+            "libJavaSupport not supported on J9");
+
         // Snapshot maps BEFORE initializing JVMAccess. The profiler may already be
         // mapped if it was loaded as a JVM agent by other tests in the same JVM;
         // in that case we cannot attribute the mapping to JVMAccess, so skip.