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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: virtualprotect.c
**
** Purpose: Positive test the VirtualProtect API.
** Call VirtualProtect to set new protect as
** PAGE_EXECUTE_READWRITE
**
**
**============================================================*/
#include <palsuite.h>
#define REGIONSIZE 1024
int __cdecl main(int argc, char *argv[])
{
int err;
LPVOID lpVirtualAddress;
DWORD OldProtect;
//Initialize the PAL environment
err = PAL_Initialize(argc, argv);
if(0 != err)
{
ExitProcess(FAIL);
}
//Allocate the physical storage in memory or in the paging file on disk
lpVirtualAddress = VirtualAlloc(NULL,//determine where to allocate the region
REGIONSIZE, //specify the size
MEM_COMMIT, //allocation type
PAGE_READONLY); //access protection
if(NULL == lpVirtualAddress)
{
Fail("\nFailed to call VirtualAlloc API!\n");
}
OldProtect = PAGE_READONLY;
//Set new access protection
err = VirtualProtect(lpVirtualAddress,
REGIONSIZE, //specify the region size
PAGE_EXECUTE_READWRITE,//desied access protection
&OldProtect);//old access protection
if(0 == err)
{
Trace("\nFailed to call VirtualProtect API!\n");
err = VirtualFree(lpVirtualAddress,REGIONSIZE,MEM_DECOMMIT);
if(0 == err)
{
Fail("\nFailed to call VirtualFree API!\n");
}
Fail("");
}
//decommit the specified region
err = VirtualFree(lpVirtualAddress,REGIONSIZE,MEM_DECOMMIT);
if(0 == err)
{
Fail("\nFailed to call VirtualFree API!\n");
}
PAL_Terminate();
return PASS;
}
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