From e2391713c2be0f714fddece51287247d0ab9f056 Mon Sep 17 00:00:00 2001
From: FalsePattern <30945458+FalsePattern@users.noreply.github.com>
Date: Sun, 12 Feb 2023 09:47:32 +0100
Subject: [PATCH] Some more reflection fixes

---
 .../lib/internal/ReflectionUtil.java          | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/falsepattern/lib/internal/ReflectionUtil.java b/src/main/java/com/falsepattern/lib/internal/ReflectionUtil.java
index 89646b1..a9250a5 100644
--- a/src/main/java/com/falsepattern/lib/internal/ReflectionUtil.java
+++ b/src/main/java/com/falsepattern/lib/internal/ReflectionUtil.java
@@ -31,13 +31,37 @@ public class ReflectionUtil {
 
     static {
         try {
-            f_modifiers = Field.class.getDeclaredField("modifiers");
+            f_modifiers = getModifiersField();
         } catch (NoSuchFieldException e) {
             throw new RuntimeException(e);
         }
         f_modifiers.setAccessible(true);
     }
 
+    // ref: https://github.com/prestodb/presto/pull/15240/files#diff-8bf996e5c1d4fb088b84ae0528bc42686b0724bcf5a2692a1e7b5eff32c90cce
+    private static Field getModifiersField() throws NoSuchFieldException
+    {
+        try {
+            return Field.class.getDeclaredField("modifiers");
+        }
+        catch (NoSuchFieldException e) {
+            try {
+                Method getDeclaredFields0 = Class.class.getDeclaredMethod("getDeclaredFields0", boolean.class);
+                getDeclaredFields0.setAccessible(true);
+                Field[] fields = (Field[]) getDeclaredFields0.invoke(Field.class, false);
+                for (Field field : fields) {
+                    if ("modifiers".equals(field.getName())) {
+                        return field;
+                    }
+                }
+            }
+            catch (ReflectiveOperationException ex) {
+                e.addSuppressed(ex);
+            }
+            throw e;
+        }
+    }
+
     @SneakyThrows
     public static void jailBreak(Field field) {
         field.setAccessible(true);