Changeset 27283 in vbox for trunk/src/VBox

Timestamp:

Mar 11, 2010 1:42:56 PM (15 years ago)

Author:

vboxsync

Message:

tstRTMemEf.cpp: Use ASMProbeReadByte to prob without optimizer interference.

File:

• trunk/src/VBox/Runtime/testcase/tstRTMemEf.cpp (modified) (3 diffs)

trunk/src/VBox/Runtime/testcase/tstRTMemEf.cpp

@@ -33 +33 @@
 *******************************************************************************/
 #include <iprt/mem.h>
+
+#include <iprt/asm.h>
+#include <iprt/initterm.h>
 #include <iprt/stream.h>
-#include <iprt/initterm.h>
 #include <iprt/string.h>
 
@@ -46 +48 @@
 static int tstMemAllocEfAccess()
 {
-    char sz[1];
-    int32_t v;
-
     /* Trivial alloc fence test - allocate a single word and access both
      * the word after the allocated block and the word before. One of them
@@ -55 +54 @@
     RTPrintf("tstRTMemAllocEfAccess: allocated int32_t at %#p\n", p);
     RTPrintf("tstRTMemAllocEfAccess: triggering buffer overrun...\n");
-    v = *(p + 1);
-    /* Dummy use of v so that the compiler cannot optimize it out */
-    RTStrPrintf(sz, 0, "", v);
+    ASMProbeReadByte(p + 1);
     RTPrintf("tstRTMemAllocEfAccess: triggering buffer underrun...\n");
-    v = *(p - 1);
-    /* Dummy use of v so that the compiler cannot optimize it out */
-    RTStrPrintf(sz, 0, "", v);
+    ASMProbeReadByte((char *)p - 1);
 
     /* Reaching this is a severe error. */