1 | /* $Id: tstPageFusion.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
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2 | /** @file
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3 | * VBoxService - Guest page sharing testcase
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2015 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 |
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19 | /*********************************************************************************************************************************
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20 | * Header Files *
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21 | *********************************************************************************************************************************/
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22 | #include <iprt/assert.h>
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23 | #include <iprt/asm.h>
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24 | #include <iprt/mem.h>
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25 | #include <iprt/messages.h>
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26 | #include <iprt/stream.h>
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27 | #include <iprt/string.h>
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28 | #include <iprt/initterm.h>
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29 | #include <VBox/VBoxGuestLib.h>
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30 | #include <iprt/x86.h>
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31 | #include <stdio.h>
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32 |
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33 |
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34 | /*********************************************************************************************************************************
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35 | * Global Variables *
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36 | *********************************************************************************************************************************/
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37 |
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38 | #ifdef RT_OS_WINDOWS
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39 | #include <Windows.h>
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40 | #include <process.h> /* Needed for file version information. */
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41 | #include <tlhelp32.h>
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42 | #include <psapi.h>
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43 | #include <winternl.h>
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44 |
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45 | #define SystemModuleInformation 11
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46 |
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47 | typedef struct _RTL_PROCESS_MODULE_INFORMATION
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48 | {
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49 | ULONG Section;
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50 | PVOID MappedBase;
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51 | PVOID ImageBase;
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52 | ULONG ImageSize;
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53 | ULONG Flags;
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54 | USHORT LoadOrderIndex;
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55 | USHORT InitOrderIndex;
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56 | USHORT LoadCount;
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57 | USHORT OffsetToFileName;
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58 | CHAR FullPathName[256];
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59 | } RTL_PROCESS_MODULE_INFORMATION, *PRTL_PROCESS_MODULE_INFORMATION;
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60 |
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61 | typedef struct _RTL_PROCESS_MODULES
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62 | {
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63 | ULONG NumberOfModules;
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64 | RTL_PROCESS_MODULE_INFORMATION Modules[1];
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65 | } RTL_PROCESS_MODULES, *PRTL_PROCESS_MODULES;
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66 |
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67 | typedef NTSTATUS (WINAPI *PFNZWQUERYSYSTEMINFORMATION)(ULONG, PVOID, ULONG, PULONG);
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68 | static PFNZWQUERYSYSTEMINFORMATION ZwQuerySystemInformation = NULL;
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69 | static HMODULE hNtdll = 0;
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70 |
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71 | #define PAGE_STATE_INVALID 0
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72 | #define PAGE_STATE_SHARED 1
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73 | #define PAGE_STATE_READ_WRITE 2
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74 | #define PAGE_STATE_READ_ONLY 3
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75 | #define PAGE_STATE_NOT_PRESENT 4
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76 |
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77 | /* Page counters. */
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78 | static unsigned cNotPresentPages = 0;
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79 | static unsigned cWritablePages = 0;
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80 | static unsigned cSharedPages = 0;
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81 | static unsigned cPrivatePages = 0;
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82 |
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83 | /**
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84 | * Registers a new module with the VMM
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85 | * @param pModule Module ptr
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86 | */
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87 | void VBoxServicePageSharingCheckModule(MODULEENTRY32 *pModule)
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88 | {
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89 | DWORD dwModuleSize = pModule->modBaseSize;
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90 | BYTE *pBaseAddress = pModule->modBaseAddr;
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91 | bool fFirstLine = true;
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92 | unsigned uPageState, uLastPageState;
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93 | bool fLastWritable = false;
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94 | BYTE *pLastBaseAddress = pBaseAddress;
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95 |
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96 | uPageState = uLastPageState = PAGE_STATE_INVALID;
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97 |
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98 | printf("Check module %s base %p size %x\n", pModule->szModule, pBaseAddress, dwModuleSize);
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99 | do
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100 | {
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101 | bool fShared;
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102 | uint64_t uPageFlags;
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103 |
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104 | #ifdef RT_ARCH_X86
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105 | int rc = VbglR3PageIsShared((uint32_t)pLastBaseAddress, &fShared, &uPageFlags);
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106 | #else
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107 | int rc = VbglR3PageIsShared((RTGCPTR)pLastBaseAddress, &fShared, &uPageFlags);
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108 | #endif
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109 | if (RT_FAILURE(rc))
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110 | printf("VbglR3PageIsShared %p failed with %d\n", pLastBaseAddress, rc);
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111 |
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112 | if (RT_SUCCESS(rc))
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113 | {
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114 | if (uPageFlags & X86_PTE_P)
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115 | {
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116 | if (uPageFlags & X86_PTE_RW)
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117 | {
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118 | cWritablePages++;
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119 | uPageState = PAGE_STATE_READ_WRITE;
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120 | }
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121 | else
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122 | if (fShared)
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123 | {
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124 | cSharedPages++;
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125 | uPageState = PAGE_STATE_SHARED;
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126 | }
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127 | else
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128 | {
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129 | cPrivatePages++;
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130 | uPageState = PAGE_STATE_READ_ONLY;
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131 | }
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132 | }
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133 | else
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134 | {
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135 | cNotPresentPages++;
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136 | uPageState = PAGE_STATE_NOT_PRESENT;
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137 | }
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138 |
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139 | if ( !fFirstLine
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140 | && uPageState != uLastPageState)
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141 | {
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142 | printf("0x%p\n", pLastBaseAddress + 0xfff);
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143 | }
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144 |
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145 | if (uPageState != uLastPageState)
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146 | {
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147 | switch (uPageState)
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148 | {
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149 | case PAGE_STATE_READ_WRITE:
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150 | printf("%s RW 0x%p - ", pModule->szModule, pBaseAddress);
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151 | break;
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152 | case PAGE_STATE_SHARED:
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153 | printf("%s SHARED 0x%p - ", pModule->szModule, pBaseAddress);
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154 | break;
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155 | case PAGE_STATE_READ_ONLY:
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156 | printf("%s PRIV 0x%p - ", pModule->szModule, pBaseAddress);
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157 | break;
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158 | case PAGE_STATE_NOT_PRESENT:
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159 | printf("%s NP 0x%p - ", pModule->szModule, pBaseAddress);
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160 | break;
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161 | }
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162 |
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163 | fFirstLine = false;
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164 | }
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165 | uLastPageState = uPageState;
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166 | }
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167 | else
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168 | if (!fFirstLine)
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169 | {
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170 | printf("0x%p\n", pLastBaseAddress + 0xfff);
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171 | fFirstLine = true;
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172 | }
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173 |
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174 | if (dwModuleSize > PAGE_SIZE)
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175 | dwModuleSize -= PAGE_SIZE;
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176 | else
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177 | dwModuleSize = 0;
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178 |
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179 | pLastBaseAddress = pBaseAddress;
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180 | pBaseAddress += PAGE_SIZE;
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181 | }
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182 | while (dwModuleSize);
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183 |
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184 | printf("0x%p\n", pLastBaseAddress + 0xfff);
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185 | return;
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186 | }
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187 |
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188 | /**
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189 | * Inspect all loaded modules for the specified process
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190 | * @param dwProcessId Process id
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191 | */
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192 | void VBoxServicePageSharingInspectModules(DWORD dwProcessId)
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193 | {
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194 | HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, dwProcessId);
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195 | if (hSnapshot == INVALID_HANDLE_VALUE)
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196 | {
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197 | printf("VBoxServicePageSharingInspectModules: CreateToolhelp32Snapshot failed with %d\n", GetLastError());
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198 | return;
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199 | }
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200 |
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201 | printf("VBoxServicePageSharingInspectModules\n");
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202 |
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203 | MODULEENTRY32 ModuleInfo;
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204 | BOOL bRet;
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205 |
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206 | ModuleInfo.dwSize = sizeof(ModuleInfo);
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207 | bRet = Module32First(hSnapshot, &ModuleInfo);
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208 | do
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209 | {
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210 | /** todo when changing this make sure VBoxService.exe is excluded! */
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211 | char *pszDot = strrchr(ModuleInfo.szModule, '.');
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212 | if ( pszDot
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213 | && (pszDot[1] == 'e' || pszDot[1] == 'E'))
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214 | continue; /* ignore executables for now. */
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215 |
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216 | VBoxServicePageSharingCheckModule(&ModuleInfo);
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217 | }
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218 | while (Module32Next(hSnapshot, &ModuleInfo));
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219 |
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220 | CloseHandle(hSnapshot);
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221 | }
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222 |
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223 | /**
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224 | * Inspect all running processes for executables and dlls that might be worth sharing
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225 | * with other VMs.
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226 | *
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227 | */
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228 | void VBoxServicePageSharingInspectGuest()
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229 | {
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230 | VBoxServicePageSharingInspectModules(GetCurrentProcessId());
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231 |
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232 | printf("\n\nUSER RESULTS\n");
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233 | printf("cNotPresentPages = %d\n", cNotPresentPages);
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234 | printf("cWritablePages = %d\n", cWritablePages);
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235 | printf("cPrivatePages = %d\n", cPrivatePages);
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236 | printf("cSharedPages = %d\n", cSharedPages);
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237 |
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238 | cNotPresentPages = 0;
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239 | cWritablePages = 0;
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240 | cPrivatePages = 0;
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241 | cSharedPages = 0;
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242 |
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243 | /* Check all loaded kernel modules. */
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244 | if (ZwQuerySystemInformation)
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245 | {
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246 | ULONG cbBuffer = 0;
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247 | PVOID pBuffer = NULL;
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248 | PRTL_PROCESS_MODULES pSystemModules;
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249 |
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250 | NTSTATUS ret = ZwQuerySystemInformation(SystemModuleInformation, (PVOID)&cbBuffer, 0, &cbBuffer);
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251 | if (!cbBuffer)
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252 | {
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253 | printf("ZwQuerySystemInformation returned length 0\n");
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254 | goto skipkernelmodules;
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255 | }
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256 |
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257 | pBuffer = RTMemAllocZ(cbBuffer);
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258 | if (!pBuffer)
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259 | goto skipkernelmodules;
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260 |
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261 | ret = ZwQuerySystemInformation(SystemModuleInformation, pBuffer, cbBuffer, &cbBuffer);
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262 | if (ret != 0)
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263 | {
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264 | printf("ZwQuerySystemInformation returned %x (1)\n", ret);
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265 | goto skipkernelmodules;
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266 | }
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267 |
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268 | pSystemModules = (PRTL_PROCESS_MODULES)pBuffer;
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269 | for (unsigned i = 0; i < pSystemModules->NumberOfModules; i++)
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270 | {
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271 | /* User-mode modules seem to have no flags set; skip them as we detected them above. */
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272 | if (pSystemModules->Modules[i].Flags == 0)
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273 | continue;
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274 |
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275 | /* New module; register it. */
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276 | char szFullFilePath[512];
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277 | MODULEENTRY32 ModuleInfo;
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278 |
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279 | strcpy(ModuleInfo.szModule, &pSystemModules->Modules[i].FullPathName[pSystemModules->Modules[i].OffsetToFileName]);
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280 | GetSystemDirectoryA(szFullFilePath, sizeof(szFullFilePath));
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281 |
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282 | /* skip \Systemroot\system32 */
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283 | char *lpPath = strchr(&pSystemModules->Modules[i].FullPathName[1], '\\');
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284 | if (!lpPath)
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285 | {
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286 | printf("Unexpected kernel module name %s\n", pSystemModules->Modules[i].FullPathName);
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287 | break;
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288 | }
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289 |
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290 | lpPath = strchr(lpPath+1, '\\');
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291 | if (!lpPath)
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292 | {
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293 | printf("Unexpected kernel module name %s\n", pSystemModules->Modules[i].FullPathName);
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294 | break;
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295 | }
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296 |
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297 | strcat(szFullFilePath, lpPath);
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298 | strcpy(ModuleInfo.szExePath, szFullFilePath);
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299 | ModuleInfo.modBaseAddr = (BYTE *)pSystemModules->Modules[i].ImageBase;
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300 | ModuleInfo.modBaseSize = pSystemModules->Modules[i].ImageSize;
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301 |
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302 | VBoxServicePageSharingCheckModule(&ModuleInfo);
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303 | }
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304 | skipkernelmodules:
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305 | if (pBuffer)
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306 | RTMemFree(pBuffer);
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307 | }
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308 | printf("\n\nKERNEL RESULTS\n");
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309 | printf("cNotPresentPages = %d\n", cNotPresentPages);
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310 | printf("cWritablePages = %d\n", cWritablePages);
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311 | printf("cPrivatePages = %d\n", cPrivatePages);
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312 | printf("cSharedPages = %d\n", cSharedPages);
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313 | }
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314 | #else
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315 | void VBoxServicePageSharingInspectGuest()
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316 | {
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317 | /* @todo other platforms */
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318 | }
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319 | #endif
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320 |
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321 |
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322 | /** @copydoc VBOXSERVICE::pfnInit */
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323 | static DECLCALLBACK(int) VBoxServicePageSharingInit(void)
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324 | {
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325 | printf("VBoxServicePageSharingInit\n");
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326 |
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327 | #ifdef RT_OS_WINDOWS
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328 | hNtdll = LoadLibrary("ntdll.dll");
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329 |
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330 | if (hNtdll)
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331 | ZwQuerySystemInformation = (PFNZWQUERYSYSTEMINFORMATION)GetProcAddress(hNtdll, "ZwQuerySystemInformation");
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332 | #endif
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333 |
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334 | /* @todo report system name and version */
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335 | /* Never fail here. */
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336 | return VINF_SUCCESS;
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337 | }
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338 |
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339 | static DECLCALLBACK(void) VBoxServicePageSharingTerm(void)
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340 | {
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341 | printf("VBoxServicePageSharingTerm\n");
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342 |
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343 | #ifdef RT_OS_WINDOWS
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344 | if (hNtdll)
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345 | FreeLibrary(hNtdll);
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346 | #endif
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347 | return;
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348 | }
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349 |
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350 | int main(int argc, char **argv)
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351 | {
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352 | /*
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353 | * Init globals and such.
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354 | */
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355 | int rc = RTR3InitExe(argc, &argv, 0);
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356 | if (RT_FAILURE(rc))
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357 | return RTMsgInitFailure(rc);
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358 |
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359 | /*
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360 | * Connect to the kernel part before daemonizing so we can fail
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361 | * and complain if there is some kind of problem. We need to initialize
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362 | * the guest lib *before* we do the pre-init just in case one of services
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363 | * needs do to some initial stuff with it.
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364 | */
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365 | printf("Calling VbgR3Init()\n");
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366 | rc = VbglR3Init();
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367 | if (RT_FAILURE(rc))
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368 | {
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369 | printf("VbglR3Init failed with rc=%Rrc.\n", rc);
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370 | return -1;
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371 | }
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372 | VBoxServicePageSharingInit();
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373 |
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374 | VBoxServicePageSharingInspectGuest();
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375 |
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376 | VBoxServicePageSharingTerm();
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377 | return 0;
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378 | }
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379 |
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