[GR-65807] Clarify which exact native agents are unsupported.

PullRequest: graal/21075

Author: javeleon

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/runtime/AgentLibraries.java

@@ -32,6 +32,7 @@
 import org.graalvm.options.OptionMap;
 
 import com.oracle.truffle.api.CompilerDirectives;
+import com.oracle.truffle.api.TruffleLogger;
 import com.oracle.truffle.api.interop.ArityException;
 import com.oracle.truffle.api.interop.InteropLibrary;
 import com.oracle.truffle.api.interop.TruffleObject;
@@ -129,6 +130,14 @@ private TruffleObject lookupOnLoad(AgentLibrary agent) {
         return getNativeAccess().lookupAndBindSymbol(library, AGENT_ONLOAD, ONLOAD_SIGNATURE, true, true);
     }
 
+    public void noSupportWarning(TruffleLogger logger) {
+        assert !agents.isEmpty();
+        logger.warning("Native agent support is currently disabled in Espresso.");
+        for (AgentLibrary agent : agents) {
+            logger.warning("Ignoring passed native agent: " + agent.name);
+        }
+    }
+
     private static class AgentLibrary {
 
         final String name;
@@ -143,6 +152,5 @@ private static class AgentLibrary {
             this.options = options;
             this.isAbsolutePath = isAbsolutePath;
         }
-
     }
 }

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/runtime/EspressoContext.java

@@ -451,7 +451,7 @@ private void spawnVM() throws ContextPatchingException {
                 registries.getBootClassRegistry().initUnnamedModule(null);
             }
             javaAgentsOnLoad();
-            initializeAgents();
+            initializeNativeAgents();
 
             try (DebugCloseable metaInit = META_INIT.scope(espressoEnv.getTimers())) {
                 this.meta = new Meta(this);
@@ -725,7 +725,7 @@ private void javaAgentsOnLoad() {
         }
     }
 
-    private void initializeAgents() {
+    private void initializeNativeAgents() {
         agents = new AgentLibraries(this);
         if (getEnv().getOptions().hasBeenSet(EspressoOptions.AgentLib)) {
             agents.registerAgents(getEnv().getOptions().get(EspressoOptions.AgentLib), false);
@@ -737,7 +737,7 @@ private void initializeAgents() {
             agents.initialize();
         } else {
             if (!agents.isEmpty()) {
-                getLogger().warning("Agents support is currently disabled in Espresso. Ignoring passed agent options.");
+                agents.noSupportWarning(getLogger());
             }
         }
     }