Changeset 20409 in vbox for trunk/src/VBox/VMM

Timestamp:

Jun 8, 2009 1:57:52 PM (16 years ago)

Author:

vboxsync

Message:

Protect REMNotifyInvalidatePage

File:

• trunk/src/VBox/VMM/VMMAll/REMAll.cpp (modified) (3 diffs)

trunk/src/VBox/VMM/VMMAll/REMAll.cpp

@@ -26 +26 @@
 #define LOG_GROUP LOG_GROUP_REM
 #include <VBox/rem.h>
+#include <VBox/em.h>
 #include <VBox/vmm.h>
 #include "REMInternal.h"
@@ -46 +47 @@
 VMMDECL(int) REMNotifyInvalidatePage(PVM pVM, RTGCPTR GCPtrPage)
 {
-    if (pVM->rem.s.cInvalidatedPages < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages))
+    if (    EMTryEnterRemLock(pVM) == VINF_SUCCESS  /* if this fails, then we'll just flush the tlb as we don't want to waste time here. */
+        &&  pVM->rem.s.cInvalidatedPages < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages))
     {
         /*
@@ -52 +54 @@
          */
         pVM->rem.s.aGCPtrInvalidatedPages[pVM->rem.s.cInvalidatedPages++] = GCPtrPage;
+        EMRemUnlock(pVM);
     }
     else