[tkreuzer] 65731: [WIN32K] Implement exclusive lock order checks for GDI objects in debug builds

Author: tkreuzer
Date: Thu Dec 18 08:12:28 2014
New Revision: 65731

URL: http://svn.reactos.org/svn/reactos?rev=65731&view=rev
Log:
[WIN32K]
Implement exclusive lock order checks for GDI objects in debug builds

Modified:
    trunk/reactos/win32ss/gdi/ntgdi/gdiobj.c

Modified: trunk/reactos/win32ss/gdi/ntgdi/gdiobj.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/gdiobj.c…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/gdiobj.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/gdiobj.c	[iso-8859-1] Thu Dec 18 08:12:28 2014
@@ -71,6 +71,22 @@
 }
 
 #if DBG
+VOID
+ASSERT_LOCK_ORDER(
+    _In_ UCHAR objt)
+{
+    PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
+    ULONG i;
+
+    if (pti)
+    {
+        /* Ensure correct locking order! */
+        for (i = objt + 1; i < GDIObjTypeTotal; i++)
+        {
+            NT_ASSERT(pti->acExclusiveLockCount[i] == 0);
+        }
+    }
+}
 #define ASSERT_SHARED_OBJECT_TYPE(objt) \
     ASSERT((objt) == GDIObjType_SURF_TYPE || \
            (objt) == GDIObjType_PAL_TYPE || \
@@ -83,6 +99,7 @@
 #define ASSERT_TRYLOCK_OBJECT_TYPE(objt) \
     ASSERT((objt) == GDIObjType_DRVOBJ_TYPE)
 #else
+#define ASSERT_LOCK_ORDER(hobj)
 #define ASSERT_SHARED_OBJECT_TYPE(objt)
 #define ASSERT_EXCLUSIVE_OBJECT_TYPE(objt)
 #define ASSERT_TRYLOCK_OBJECT_TYPE(objt)
@@ -669,6 +686,9 @@
         return NULL;
     }
 
+    /* Make sure lock order is correct */
+    ASSERT_LOCK_ORDER(objt);
+
     /* Reference the handle entry */
     pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
     if (!pentry)
@@ -734,6 +754,9 @@
         DPRINT("Wrong object type: hobj=0x%p, objt=0x%x\n", hobj, objt);
         return NULL;
     }
+
+    /* Make sure lock order is correct */
+    ASSERT_LOCK_ORDER(objt);
 
     /* Reference the handle entry */
     pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);