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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*============================================================
**
** Source: test2.c
**
** Purpose:
** Create three consecuative pages, NOACCES, READWRITE and
** NOACCESS. Check to ensure that the READWRITE page returns 0, to
** ensure that IsBadWritePtr isn't overflowing. Also check the other two
** pages to see that they return non-zero.
**
**
**=========================================================*/
#include <palsuite.h>
#define PAGE_SIZE 4096
int __cdecl main(int argc, char *argv[]) {
LPVOID PageOne, PageTwo, PageThree;
if(0 != (PAL_Initialize(argc, argv)))
{
return FAIL;
}
/* Reserve enough space for four pages. We'll commit this memory
and set the correct access for each page below.
*/
PageOne = VirtualAlloc(NULL,
PAGE_SIZE*4,
MEM_RESERVE,
PAGE_NOACCESS);
if(PageOne == NULL)
{
Fail("ERROR: VirtualAlloc failed to reserve the required memory.\n");
}
/* Set the first Page to PAGE_NOACCESS */
PageOne = VirtualAlloc(PageOne,
PAGE_SIZE,
MEM_COMMIT,
PAGE_NOACCESS);
if(PageOne == NULL)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: VirtualAlloc failed to commit the required memory "
"for the first page.\n");
}
/* Set the second Page to PAGE_READWRITE */
PageTwo = VirtualAlloc(((BYTE*)PageOne)+PAGE_SIZE,
PAGE_SIZE,
MEM_COMMIT,
PAGE_READWRITE);
if(PageTwo == NULL)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: VirtualAlloc failed to allocate the required memory "
"for the second page. %d\n",GetLastError());
}
/* Set the third Page to PAGE_NOACCESS */
PageThree = VirtualAlloc(((BYTE*)PageTwo) + (2 * PAGE_SIZE),
PAGE_SIZE,
MEM_COMMIT,
PAGE_NOACCESS);
if(PageThree == NULL)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: VirtualAlloc failed to allocate the required memory. "
"For the third page.\n");
}
/* Check that calling IsBadWritePtr on the first page returns non-zero */
if(IsBadWritePtr(PageThree,PAGE_SIZE) == 0)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: Called IsBadWritePtr on a page which was set NOACCESS "
"but the return value was 0, indicating that the memory is "
"writable.\n");
}
/* Check that calling IsBadWritePtr on the middle page returns 0 */
if(IsBadWritePtr(PageTwo,PAGE_SIZE) != 0)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: IsBadWritePtr didn't return 0 when called on a "
"page which should have been writable.\n");
}
/* Check that calling IsBadWritePtr on the third page returns non-zero */
if(IsBadWritePtr(PageThree,PAGE_SIZE) == 0)
{
VirtualFree(PageOne,0,MEM_RELEASE);
Fail("ERROR: Called IsBadWritePtr on a page which was set NOACCESS "
"but the return value was 0, indicating that the memory is "
"writable.\n");
}
VirtualFree(PageOne,0,MEM_RELEASE);
PAL_Terminate();
return PASS;
}
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