From 4a739ecb78843375df1691f0924c4603e1af974d Mon Sep 17 00:00:00 2001
From: Karlatemp <kar@kasukusakura.com>
Date: Tue, 13 Sep 2022 23:01:53 +0800
Subject: Skip remap inner class name if not changed

---
 .../java/org/objectweb/asm/commons/Remapper.java   | 14 +++++++++++
 .../objectweb/asm/commons/ClassRemapperTest.java   | 27 ++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/asm-commons/src/main/java/org/objectweb/asm/commons/Remapper.java b/asm-commons/src/main/java/org/objectweb/asm/commons/Remapper.java
index 414edcec..00c5e99a 100644
--- a/asm-commons/src/main/java/org/objectweb/asm/commons/Remapper.java
+++ b/asm-commons/src/main/java/org/objectweb/asm/commons/Remapper.java
@@ -263,6 +263,20 @@ public abstract class Remapper {
   public String mapInnerClassName(
       final String name, final String ownerName, final String innerName) {
     final String remappedInnerName = this.mapType(name);
+
+    if (remappedInnerName.equals(name)) {
+      return innerName;
+    } else {
+      int originSplit = name.lastIndexOf('/');
+      int remappedSplit = remappedInnerName.lastIndexOf('/');
+      if (originSplit != -1 && remappedSplit != -1) {
+        if (name.substring(originSplit).equals(remappedInnerName.substring(remappedSplit))) {
+          // class name not changed
+          return innerName;
+        }
+      }
+    }
+
     if (remappedInnerName.contains("$")) {
       int index = remappedInnerName.lastIndexOf('$') + 1;
       while (index < remappedInnerName.length()
diff --git a/asm-commons/src/test/java/org/objectweb/asm/commons/ClassRemapperTest.java b/asm-commons/src/test/java/org/objectweb/asm/commons/ClassRemapperTest.java
index 3cb9e168..697125f3 100644
--- a/asm-commons/src/test/java/org/objectweb/asm/commons/ClassRemapperTest.java
+++ b/asm-commons/src/test/java/org/objectweb/asm/commons/ClassRemapperTest.java
@@ -148,6 +148,33 @@ class ClassRemapperTest extends AsmTest {
     assertEquals("b", classNode.innerClasses.get(0).innerName);
   }
 
+  @Test
+  void testVisitInnerClass_specialRemap() {
+    ClassNode classNode = new ClassNode();
+    ClassRemapper remapper =
+        new ClassRemapper(
+            classNode,
+            new Remapper() {
+              @Override
+              public String map(final String internalName) {
+                if ("pkg/C".equals(internalName)) {
+                  return "pkg2/C";
+                }
+                if ("pkg/C$$a".equals(internalName)) {
+                  return "pkg2/C$$a";
+                }
+                return internalName;
+              }
+            });
+    remapper.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "pkg/C", null, "java/lang/Object", null);
+
+    remapper.visitInnerClass("pkg/C$$a", "pkg/C", "$a", Opcodes.ACC_PUBLIC);
+
+    assertEquals("pkg2/C$$a", classNode.innerClasses.get(0).name);
+    assertEquals("pkg2/C", classNode.innerClasses.get(0).outerName);
+    assertEquals("$a", classNode.innerClasses.get(0).innerName);
+  }
+
   @Test
   void testVisitAttribute_moduleHashes() {
     ClassNode classNode = new ClassNode();
-- 
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