[tkreuzer] 56300: [NTOSKRNL] - If neccessary unlock the working set in MiMakeSystemAddressValid before calling MmAccessFault, fixes a failed ASSERT, when coming from NtFreeVirtualMemory - Remove du...

Author: tkreuzer
Date: Sun Apr  1 13:34:18 2012
New Revision: 56300

URL: http://svn.reactos.org/svn/reactos?rev=56300&view=rev
Log:
[NTOSKRNL]
- If neccessary unlock the working set in MiMakeSystemAddressValid before calling MmAccessFault, fixes a failed ASSERT, when coming from NtFreeVirtualMemory
- Remove duplicated ASSERT

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/miarm.h
    trunk/reactos/ntoskrnl/mm/ARM3/virtual.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/miarm.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/miarm.h?re...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] Sun Apr  1 13:34:18 2012
@@ -917,7 +917,6 @@
     //ASSERT(Process->Vm.Flags.AcquiredUnsafe == 0);

/* Okay, now we can own it exclusively */
-    ASSERT(Thread->OwnsProcessWorkingSetExclusive == FALSE);
     Thread->OwnsProcessWorkingSetExclusive = TRUE;
 }

Modified: trunk/reactos/ntoskrnl/mm/ARM3/virtual.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/virtual.c?...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/virtual.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/virtual.c [iso-8859-1] Sun Apr  1 13:34:18 2012
@@ -34,7 +34,8 @@
                          IN PEPROCESS CurrentProcess)
 {
     NTSTATUS Status;
-    BOOLEAN LockChange = FALSE;
+    BOOLEAN WsWasLocked = FALSE, LockChange = FALSE;
+    PETHREAD CurrentThread = PsGetCurrentThread();

/* Must be a non-pool page table, since those are double-mapped already */
     ASSERT(PageTableVirtualAddress > MM_HIGHEST_USER_ADDRESS);
@@ -47,6 +48,14 @@
     /* Check if the page table is valid */
     while (!MmIsAddressValid(PageTableVirtualAddress))
     {
+        /* Check if the WS is locked */
+        if (CurrentThread->OwnsProcessWorkingSetExclusive)
+        {
+            /* Unlock the working set and remember it was locked */
+            MiUnlockProcessWorkingSet(CurrentProcess, CurrentThread);
+            WsWasLocked = TRUE;
+        }
+
         /* Fault it in */
         Status = MmAccessFault(FALSE, PageTableVirtualAddress, KernelMode, NULL);
         if (!NT_SUCCESS(Status))
@@ -58,6 +67,9 @@
                          (ULONG_PTR)CurrentProcess,
                          (ULONG_PTR)PageTableVirtualAddress);
         }
+
+        /* Lock the working set again */
+        if (WsWasLocked) MiLockProcessWorkingSet(CurrentProcess, CurrentThread);

/* This flag will be useful later when we do better locking */
         LockChange = TRUE;