After review changes

Author: horakivo

src/main/java/org/truffleruby/core/cast/NameToJavaStringNode.java

@@ -20,6 +20,7 @@
 import org.truffleruby.utils.Utils;
 
 import com.oracle.truffle.api.dsl.Cached;
+import com.oracle.truffle.api.dsl.Cached.Exclusive;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.NodeChild;
 import com.oracle.truffle.api.dsl.Specialization;
@@ -50,7 +51,7 @@ public static NameToJavaStringNode getUncached() {
 
     @Specialization(guards = "libString.isRubyString(value)", limit = "1")
     protected String stringNameToJavaString(Object value,
-            @Cached @Shared RubyStringLibrary libString,
+            @Cached @Exclusive RubyStringLibrary libString,
             @Cached @Shared ToJavaStringNode toJavaStringNode) {
         return toJavaStringNode.executeToJavaString(value);
     }
@@ -70,8 +71,8 @@ protected String nameToJavaString(String value) {
     protected String nameToJavaString(Object object,
             @Cached BranchProfile errorProfile,
             @Cached DispatchNode toStr,
-            @Cached @Shared RubyStringLibrary libString,
-            @Cached @Shared ToJavaStringNode toJavaStringNode) {
+            @Cached @Exclusive RubyStringLibrary libString,
+            @Cached @Exclusive ToJavaStringNode toJavaStringNode) {
         final Object coerced;
         try {
             coerced = toStr.call(object, "to_str");

src/main/java/org/truffleruby/core/cast/ToSymbolNode.java

@@ -11,6 +11,7 @@
 
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.Cached.Shared;
+import com.oracle.truffle.api.dsl.Cached.Exclusive;
 import com.oracle.truffle.api.dsl.NeverDefault;
 import com.oracle.truffle.api.dsl.NodeChild;
 import com.oracle.truffle.api.profiles.BranchProfile;
@@ -86,7 +87,7 @@ protected RubySymbol rubyStringUncached(Object str,
     protected RubySymbol toStr(Object object,
             @Cached BranchProfile errorProfile,
             @Cached DispatchNode toStrNode,
-            @Cached @Shared RubyStringLibrary strings,
+            @Cached @Exclusive RubyStringLibrary strings,
             @Cached ToSymbolNode toSymbolNode) {
         var coerced = toStrNode.call(
                 coreLibrary().truffleTypeModule,

src/main/java/org/truffleruby/core/format/convert/ToStringNode.java

@@ -105,14 +105,14 @@ protected Object toStringSpecialClass(RubyClass rubyClass,
         }
     }
 
-    @Specialization(guards = "libString.isRubyString(string)", limit = "1")
+    @Specialization(guards = "argLibString.isRubyString(string)", limit = "1")
     protected Object toStringString(Object string,
-            @Cached @Exclusive RubyStringLibrary libValue,
-            @Cached @Shared RubyStringLibrary libString) {
+            @Cached @Shared RubyStringLibrary libString,
+            @Cached @Exclusive RubyStringLibrary argLibString) {
         if ("inspect".equals(conversionMethod)) {
             final Object value = getToStrNode().call(string, conversionMethod);
 
-            if (libValue.isRubyString(value)) {
+            if (libString.isRubyString(value)) {
                 return value;
             } else {
                 throw new NoImplicitConversionException(string, "String");