Add ensureMaterializedForStackWalk substitution

Author: gilles-duboscq

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

@@ -147,6 +147,10 @@ public boolean java19OrLater() {
         return version >= 19;
     }
 
+    public boolean java20OrLater() {
+        return version >= 20;
+    }
+
     public boolean inRange(int low, int high) {
         return version >= low && version <= high;
     }

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/substitutions/Target_java_lang_Thread.java

@@ -26,6 +26,7 @@
 import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicLong;
 
+import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.dsl.Bind;
 import com.oracle.truffle.api.dsl.Cached;
@@ -302,4 +303,9 @@ public static void setNativeName(@JavaType(Thread.class) StaticObject self, @Jav
     public static @JavaType(Object.class) StaticObject getStackTrace0(@JavaType(Thread.class) StaticObject self) {
         throw EspressoError.unimplemented("async_get_stacktrace");
     }
+
+    @Substitution(versionFilter = VersionFilter.Java20OrLater.class, isTrivial = true)
+    public static void ensureMaterializedForStackWalk(@JavaType(Object.class) StaticObject obj) {
+        CompilerDirectives.blackhole(obj);
+    }
 }

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/substitutions/VersionFilter.java

@@ -100,4 +100,16 @@ public boolean isValidFor(JavaVersion version) {
             return version.java19OrLater();
         }
     }
+
+    final class Java20OrLater implements VersionFilter {
+        public static final Java20OrLater INSTANCE = new Java20OrLater();
+
+        private Java20OrLater() {
+        }
+
+        @Override
+        public boolean isValidFor(JavaVersion version) {
+            return version.java20OrLater();
+        }
+    }
 }