From c743be7560affd67849a7aea20f664797f9ead5a Mon Sep 17 00:00:00 2001
From: yeshanshan <yeshanshan@uniontech.com>
Date: Thu, 16 Oct 2025 13:15:24 +0800
Subject: [PATCH] fix: sync with qt5platform-plugins

https://github.com/linuxdeepin/qt5platform-plugins/pull/305
---
 src/util/dvtablehook.cpp | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/util/dvtablehook.cpp b/src/util/dvtablehook.cpp
index aed8a9ad..01dd0ac0 100644
--- a/src/util/dvtablehook.cpp
+++ b/src/util/dvtablehook.cpp
@@ -229,7 +229,21 @@ bool DVtableHook::hasVtable(const void *obj)
 {
     quintptr **_obj = (quintptr**)(obj);
 
-    return objToGhostVfptr.contains(_obj);
+    // 验证 vtable 是否匹配
+    quintptr *ghost_vtable = objToGhostVfptr.value(obj);
+    if (!ghost_vtable) {
+        return false;
+    }
+
+    // 检查当前对象的 vtable 指针是否指向我们记录的 ghost vtable
+    if (*_obj != adjustToEntry(ghost_vtable)) {
+        // vtable 不匹配，说明地址被重用了
+        qCDebug(vtableHook) << "hasVtable: vtable mismatch! Address reused by different object."
+                               << "obj:" << QString("0x%1").arg((quintptr)obj, 0, 16);        
+        return false;
+    }
+
+    return true;
 }
 
 void DVtableHook::resetVtable(const void *obj)