[GR-66513] Removed conflicting tests that use the same port number and reuse the server address.

PullRequest: graal/21255

Author: entlicher

tools/src/com.oracle.truffle.tools.dap.test/src/com/oracle/truffle/tools/dap/test/DAPAddressTest.java

@@ -53,15 +53,6 @@ public void tearDown() {
         output.reset();
     }
 
-    @Test
-    public void testHostPortDefault() {
-        try (Context context = Context.newBuilder().option("dap", "").out(output).build()) {
-            assert context != null;
-        }
-        String[] address = parseSocketAddress(output);
-        assertAddress("127.0.0.1", "4711", address);
-    }
-
     @Test
     public void testHostPortEnabled() {
         try (Context context = Context.newBuilder().option("dap", "true").out(output).build()) {
@@ -80,25 +71,6 @@ public void testHostPortDisabled() {
         assertTrue(out, out.isEmpty());
     }
 
-    @Test
-    public void testHost() {
-        Assume.assumeTrue(System.getProperty("os.name").contains("Linux")); // Extra IPs are used
-        try (Context context = Context.newBuilder().option("dap", "127.0.0.2").out(output).build()) {
-            assert context != null;
-        }
-        String[] address = parseSocketAddress(output);
-        assertAddress("127.0.0.2", "4711", address);
-    }
-
-    @Test
-    public void testPort() {
-        try (Context context = Context.newBuilder().option("dap", "7411").out(output).build()) {
-            assert context != null;
-        }
-        String[] address = parseSocketAddress(output);
-        assertAddress("127.0.0.1", "7411", address);
-    }
-
     @Test
     public void testBadPorts() {
         // Negative
@@ -123,11 +95,11 @@ private void assertBadPort(int p) {
     @Test
     public void testHostPort() {
         Assume.assumeTrue(System.getProperty("os.name").contains("Linux")); // Extra IPs are used
-        try (Context context = Context.newBuilder().option("dap", "127.0.0.2:7411").out(output).build()) {
+        try (Context context = Context.newBuilder().option("dap", "127.0.0.2:0").out(output).build()) {
             assert context != null;
         }
         String[] address = parseSocketAddress(output);
-        assertAddress("127.0.0.2", "7411", address);
+        assertAddress("127.0.0.2", "?", address);
     }
 
     @Test

tools/src/com.oracle.truffle.tools.dap/src/com/oracle/truffle/tools/dap/instrument/DAPInstrument.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -217,6 +217,7 @@ private void launchServer(TruffleInstrument.Env env, PrintWriter info, PrintWrit
             final int port = socketAddress.getPort();
             final ExecutionContext context = new ExecutionContext(env, info, err, options.get(Internal), options.get(Initialization));
             final ServerSocket serverSocket = new ServerSocket(port, options.get(SocketBacklogSize), socketAddress.getAddress());
+            serverSocket.setReuseAddress(true);
             dapServer = DebugProtocolServerImpl.create(context, options.get(Suspend), options.get(WaitAttached), options.get(Initialization), options.get(SourcePath));
             dapServer.start(serverSocket).exceptionally(throwable -> {
                 throwable.printStackTrace(err);