1// Licensed to the .NET Foundation under one or more agreements.
2// The .NET Foundation licenses this file to you under the MIT license.
3// See the LICENSE file in the project root for more information.
4
5/*=============================================================
6**
7** Source: virtualprotect.c
8**
9** Purpose: Positive test the VirtualProtect API.
10** Call VirtualProtect to set new protect as
11** PAGE_EXECUTE_READ
12**
13**
14**============================================================*/
15#include <palsuite.h>
16
17#define REGIONSIZE 1024
18
19int __cdecl main(int argc, char *argv[])
20{
21 int err;
22 LPVOID lpVirtualAddress;
23 DWORD OldProtect;
24
25 //Initialize the PAL environment
26 err = PAL_Initialize(argc, argv);
27 if(0 != err)
28 {
29 ExitProcess(FAIL);
30 }
31
32 //Allocate the physical storage in memory or in the paging file on disk
33 lpVirtualAddress = VirtualAlloc(NULL,//determine where to allocate the region
34 REGIONSIZE, //specify the size
35 MEM_COMMIT, //allocation type
36 PAGE_READONLY); //access protection
37 if(NULL == lpVirtualAddress)
38 {
39 Fail("\nFailed to call VirtualAlloc API!\n");
40 }
41
42 OldProtect = PAGE_READONLY;
43 //Set new access protection
44 err = VirtualProtect(lpVirtualAddress,
45 REGIONSIZE, //specify the region size
46 PAGE_EXECUTE_READ,//desied access protection
47 &OldProtect);//old access protection
48 if(0 == err)
49 {
50 Trace("\nFailed to call VirtualProtect API!\n");
51 err = VirtualFree(lpVirtualAddress,REGIONSIZE,MEM_DECOMMIT);
52 if(0 == err)
53 {
54 Fail("\nFailed to call VirtualFree API!\n");
55 }
56 Fail("");
57 }
58
59
60 //decommit the specified region
61 err = VirtualFree(lpVirtualAddress,REGIONSIZE,MEM_DECOMMIT);
62 if(0 == err)
63 {
64 Fail("\nFailed to call VirtualFree API!\n");
65 }
66
67 PAL_Terminate();
68 return PASS;
69}
70