[GR-39181] Avoid invalid/destroyed (libgraal) compiler isolates in purgePartialEvaluationCaches.

PullRequest: graal/11984

Author: mukel

compiler/src/org.graalvm.compiler.truffle.runtime.hotspot.libgraal/src/org/graalvm/compiler/truffle/runtime/hotspot/libgraal/LibGraalHotSpotTruffleCompiler.java

@@ -37,6 +37,7 @@
 import org.graalvm.compiler.truffle.common.hotspot.HotSpotTruffleCompiler;
 import org.graalvm.compiler.truffle.runtime.GraalTruffleRuntime;
 import org.graalvm.compiler.truffle.runtime.OptimizedCallTarget;
+import org.graalvm.libgraal.DestroyedIsolateException;
 import org.graalvm.libgraal.LibGraal;
 import org.graalvm.libgraal.LibGraalObject;
 import org.graalvm.libgraal.LibGraalScope;
@@ -199,7 +200,19 @@ private static Supplier<Map<String, Object>> optionsEncoder(CompilableTruffleAST
     @SuppressWarnings("try")
     public void purgePartialEvaluationCaches() {
         try (LibGraalScope scope = new LibGraalScope(LibGraalScope.DetachAction.DETACH_RUNTIME_AND_RELEASE)) {
-            TruffleToLibGraalCalls.purgePartialEvaluationCaches(getIsolateThread(), handle());
+            try {
+                long compilerHandle = handle();
+                TruffleToLibGraalCalls.purgePartialEvaluationCaches(getIsolateThread(), compilerHandle);
+            } catch (DestroyedIsolateException e) {
+                // Truffle compiler threads (trying to purge PE caches) may race during VM exit with
+                // the compiler isolate teardown. DestroyedIsolateException is only expected to be
+                // observed here during VM exit; where it can be safely ignored.
+                if (e.isVmExit()) {
+                    // ignore
+                } else {
+                    throw e;
+                }
+            }
         }
     }
 }