1 | //////////////////////////////////////////////////////////// |
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2 | // Copyright (C) Roman Ryltsov, 2008-2011 |
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3 | // Created by Roman Ryltsov roman@alax.info |
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4 | // |
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5 | // $Id: VirtualHeapPtr.h 37 2011-11-07 10:00:04Z roman $ |
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6 | |
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7 | #pragma once |
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8 | |
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9 | //////////////////////////////////////////////////////////// |
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10 | // CGlobalVirtualAllocator |
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11 | |
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12 | class CGlobalVirtualAllocator |
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13 | { |
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14 | private: |
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15 | SIZE_T m_nPageSize; |
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16 | |
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17 | public: |
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18 | // CGlobalVirtualAllocator |
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19 | CGlobalVirtualAllocator() throw() : |
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20 | m_nPageSize(4 << 10) // 4L |
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21 | { |
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22 | SYSTEM_INFO Information; |
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23 | GetSystemInfo(&Information); |
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24 | m_nPageSize = Information.dwPageSize; |
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25 | ATLASSERT(m_nPageSize); |
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26 | ATLASSERT(!(m_nPageSize & (m_nPageSize - 1))); |
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27 | } |
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28 | SIZE_T GetPageSize() const throw() |
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29 | { |
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30 | return m_nPageSize; |
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31 | } |
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32 | SIZE_T Align(SIZE_T nDataSize) throw() |
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33 | { |
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34 | const SIZE_T nPageSize = GetPageSize(); |
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35 | ATLASSERT(nPageSize); |
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36 | ATLASSERT(!(nPageSize & (nPageSize - 1))); |
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37 | return (nDataSize + nPageSize - 1) & ~(nPageSize - 1); |
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38 | } |
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39 | static SIZE_T StaticAlign(SIZE_T nDataSize) throw(); |
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40 | }; |
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41 | |
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42 | __declspec(selectany) CGlobalVirtualAllocator g_GlobalVirtualAllocator; |
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43 | |
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44 | inline SIZE_T CGlobalVirtualAllocator::StaticAlign(SIZE_T nDataSize) throw() |
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45 | { |
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46 | return g_GlobalVirtualAllocator.Align(nDataSize); |
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47 | } |
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48 | |
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49 | //////////////////////////////////////////////////////////// |
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50 | // CVirtualAllocator |
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51 | |
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52 | class CVirtualAllocator |
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53 | { |
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54 | public: |
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55 | // CVirtualAllocator |
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56 | static VOID* Allocate(_In_ SIZE_T nDataSize) |
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57 | { |
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58 | if(!nDataSize) |
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59 | return NULL; |
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60 | VOID* pvData = VirtualAlloc(NULL, CGlobalVirtualAllocator::StaticAlign(nDataSize), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); |
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61 | ATLENSURE_THROW(pvData, AtlHresultFromLastError()); |
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62 | return pvData; |
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63 | } |
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64 | static VOID* Reallocate(_In_opt_ VOID* pvData, _In_ SIZE_T nDataSize) |
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65 | { |
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66 | MEMORY_BASIC_INFORMATION DataInformation; |
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67 | if(pvData) |
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68 | { |
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69 | ATLVERIFY(VirtualQuery(pvData, &DataInformation, sizeof DataInformation)); |
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70 | if(nDataSize <= DataInformation.RegionSize) |
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71 | return pvData; |
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72 | } |
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73 | VOID* pvNewData = NULL; |
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74 | if(nDataSize) |
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75 | { |
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76 | pvNewData = VirtualAlloc(NULL, CGlobalVirtualAllocator::StaticAlign(nDataSize), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); |
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77 | ATLENSURE_THROW(pvNewData, AtlHresultFromLastError()); |
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78 | _ATLTRY |
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79 | { |
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80 | if(pvNewData && pvData) |
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81 | { |
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82 | ATLASSERT(DataInformation.AllocationProtect == PAGE_READWRITE); |
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83 | SIZE_T nCopyDataSize = nDataSize; |
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84 | if(nCopyDataSize > DataInformation.RegionSize) |
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85 | nCopyDataSize = DataInformation.RegionSize; |
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86 | Checked::memcpy_s(pvNewData, nDataSize, pvData, nCopyDataSize); |
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87 | } |
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88 | } |
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89 | _ATLCATCHALL() |
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90 | { |
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91 | Free(pvData); |
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92 | _ATLRETHROW; |
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93 | } |
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94 | } |
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95 | if(pvData) |
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96 | Free(pvData); |
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97 | return pvNewData; |
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98 | } |
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99 | static VOID Free(_In_opt_ VOID* pvData) throw() |
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100 | { |
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101 | if(!pvData) |
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102 | return; |
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103 | ATLVERIFY(VirtualFree(pvData, 0, MEM_RELEASE)); |
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104 | } |
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105 | }; |
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106 | |
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107 | //////////////////////////////////////////////////////////// |
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108 | // CVirtualHeapPtr |
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109 | |
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110 | template <typename T> |
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111 | class CVirtualHeapPtr : |
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112 | public CHeapPtr<T, CVirtualAllocator> |
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113 | { |
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114 | public: |
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115 | // CVirtualHeapPtr |
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116 | CVirtualHeapPtr() throw() |
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117 | { |
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118 | } |
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119 | explicit CVirtualHeapPtr(_In_ T* pData) throw() : |
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120 | CHeapPtr<T, CVirtualAllocator>(pData) |
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121 | { |
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122 | } |
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123 | VOID SetProtection(DWORD nProtection) |
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124 | { |
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125 | if(!m_pData) |
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126 | return; |
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127 | MEMORY_BASIC_INFORMATION DataInformation; |
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128 | ATLENSURE_THROW(VirtualQuery(m_pData, &DataInformation, sizeof DataInformation), AtlHresultFromLastError()); |
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129 | DWORD nCurrentProtection; |
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130 | ATLENSURE_THROW(VirtualProtect(m_pData, DataInformation.RegionSize, nProtection, &nCurrentProtection), AtlHresultFromLastError()); |
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131 | } |
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132 | }; |
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133 | |
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134 | //////////////////////////////////////////////////////////// |
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135 | // CDebugAllocatorTraits |
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136 | |
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137 | class CDebugAllocatorTraits |
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138 | { |
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139 | public: |
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140 | // CDebugAllocatorTraits |
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141 | static SIZE_T GetHeadSanityPageCount() throw() |
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142 | { |
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143 | return 1; |
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144 | } |
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145 | static SIZE_T GetTailSanityPageCount() throw() |
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146 | { |
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147 | return 1; |
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148 | } |
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149 | static BOOL IsHeadPadding() throw() |
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150 | { |
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151 | return TRUE; |
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152 | } |
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153 | }; |
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154 | |
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155 | //////////////////////////////////////////////////////////// |
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156 | // CDebugAllocatorT, CDebugAllocator |
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157 | |
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158 | template <typename _Traits = CDebugAllocatorTraits> |
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159 | class CDebugAllocatorT |
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160 | { |
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161 | public: |
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162 | typedef _Traits CTraits; |
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163 | |
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164 | //////////////////////////////////////////////////////// |
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165 | // CDescriptor |
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166 | |
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167 | class CDescriptor |
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168 | { |
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169 | public: |
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170 | SIZE_T m_nAllocationSize; |
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171 | VOID* m_pvData; |
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172 | SIZE_T m_nDataSize; |
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173 | VOID* m_pvPaddingData; |
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174 | SIZE_T m_nPaddingDataSize; |
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175 | |
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176 | public: |
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177 | // CDescriptor |
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178 | static CDescriptor* Allocate(SIZE_T nDataSize) |
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179 | { |
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180 | ATLASSERT(nDataSize > 0); |
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181 | const SIZE_T nPageSize = g_GlobalVirtualAllocator.GetPageSize(); |
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182 | const SIZE_T nAlignedDataSize = g_GlobalVirtualAllocator.Align(nDataSize); |
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183 | const SIZE_T nAllocationSize = |
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184 | g_GlobalVirtualAllocator.Align(sizeof (CDescriptor)) + |
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185 | CTraits::GetHeadSanityPageCount() * nPageSize + |
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186 | nAlignedDataSize + |
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187 | CTraits::GetTailSanityPageCount() * nPageSize + |
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188 | 0; |
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189 | VOID* pvData = VirtualAlloc(NULL, nAllocationSize, MEM_COMMIT | MEM_RESERVE, PAGE_NOACCESS); |
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190 | ATLENSURE_THROW(pvData, AtlHresultFromLastError()); |
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191 | CDescriptor* pDescriptor = (CDescriptor*) pvData; |
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192 | DWORD nCurrentProtection; |
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193 | ATLVERIFY(VirtualProtect(pDescriptor, sizeof *pDescriptor, PAGE_READWRITE, &nCurrentProtection)); |
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194 | pDescriptor->m_nAllocationSize = nAllocationSize; |
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195 | pDescriptor->m_pvData = (BYTE*) pDescriptor + g_GlobalVirtualAllocator.Align(sizeof *pDescriptor) + CTraits::GetHeadSanityPageCount() * nPageSize; |
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196 | pDescriptor->m_nDataSize = nDataSize; |
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197 | const SIZE_T nPaddingDataSize = nAlignedDataSize - nDataSize; |
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198 | if(CTraits::IsHeadPadding() && nPaddingDataSize) |
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199 | { |
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200 | pDescriptor->m_pvPaddingData = pDescriptor->m_pvData; |
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201 | reinterpret_cast<BYTE*&>(pDescriptor->m_pvData) += nPaddingDataSize; |
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202 | } else |
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203 | pDescriptor->m_pvPaddingData = (BYTE*) pDescriptor->m_pvData + nAlignedDataSize - nPaddingDataSize; |
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204 | pDescriptor->m_nPaddingDataSize = nPaddingDataSize; |
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205 | ATLVERIFY(VirtualProtect(pDescriptor->m_pvData, pDescriptor->m_nDataSize, PAGE_READWRITE, &nCurrentProtection)); |
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206 | memset(pDescriptor->m_pvPaddingData, 0x77, pDescriptor->m_nPaddingDataSize); |
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207 | ATLVERIFY(VirtualProtect(pDescriptor, sizeof *pDescriptor, PAGE_READONLY, &nCurrentProtection)); |
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208 | return pDescriptor; |
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209 | } |
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210 | static CDescriptor* FromData(VOID* pvData) |
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211 | { |
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212 | ATLASSERT(pvData); |
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213 | ATLASSERT(!(g_GlobalVirtualAllocator.GetPageSize() & (g_GlobalVirtualAllocator.GetPageSize() - 1))); |
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214 | BYTE* pnData = (BYTE*) ((UINT_PTR) pvData & ~(g_GlobalVirtualAllocator.GetPageSize() - 1)); |
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215 | CDescriptor* pDescriptor = (CDescriptor*) (pnData - CTraits::GetHeadSanityPageCount() * g_GlobalVirtualAllocator.GetPageSize() - g_GlobalVirtualAllocator.Align(sizeof (CDescriptor))); |
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216 | return pDescriptor; |
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217 | } |
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218 | //VOID Initialize() |
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219 | VOID Terminate() |
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220 | { |
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221 | _ATLTRY |
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222 | { |
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223 | ATLENSURE_THROW(IsPaddingValid(), HRESULT_FROM_WIN32(ERROR_INVALID_DATA)); |
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224 | } |
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225 | _ATLCATCHALL() |
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226 | { |
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227 | } |
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228 | ATLVERIFY(VirtualFree(this, 0, MEM_RELEASE)); |
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229 | } |
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230 | VOID* GetData() const throw() |
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231 | { |
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232 | return m_pvData; |
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233 | } |
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234 | SIZE_T GetDataSize() const throw() |
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235 | { |
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236 | return m_nDataSize; |
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237 | } |
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238 | BOOL IsPaddingValid() const throw() |
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239 | { |
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240 | BYTE* pnPaddingData = (BYTE*) m_pvPaddingData; |
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241 | for(SIZE_T nIndex = m_nPaddingDataSize; nIndex > 0; nIndex--, pnPaddingData++) |
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242 | if(*pnPaddingData != 0x77) |
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243 | return FALSE; |
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244 | return TRUE; |
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245 | } |
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246 | }; |
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247 | |
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248 | public: |
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249 | // CDebugAllocator |
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250 | static VOID* Allocate(_In_ SIZE_T nDataSize) |
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251 | { |
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252 | if(!nDataSize) |
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253 | return NULL; |
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254 | CDescriptor* pDescriptor = CDescriptor::Allocate(nDataSize); |
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255 | ATLASSERT(pDescriptor); |
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256 | return pDescriptor->GetData(); |
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257 | } |
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258 | static VOID* Reallocate(_In_opt_ VOID* pvData, _In_ SIZE_T nDataSize) |
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259 | { |
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260 | CDescriptor* pDescriptor; |
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261 | if(pvData) |
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262 | { |
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263 | pDescriptor = CDescriptor::FromData(pvData); |
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264 | if(nDataSize == pDescriptor->GetDataSize()) |
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265 | return pvData; |
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266 | } else |
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267 | pDescriptor = NULL; |
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268 | VOID* pvNewData = NULL; |
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269 | if(nDataSize) |
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270 | { |
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271 | CDescriptor* pNewDescriptor = CDescriptor::Allocate(nDataSize); |
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272 | ATLASSERT(pNewDescriptor); |
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273 | _ATLTRY |
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274 | { |
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275 | if(pNewDescriptor && pDescriptor) |
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276 | { |
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277 | SIZE_T nCopyDataSize = nDataSize; |
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278 | if(nCopyDataSize > pDescriptor->GetDataSize()) |
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279 | nCopyDataSize = pDescriptor->GetDataSize(); |
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280 | Checked::memcpy_s(pNewDescriptor->GetData(), pNewDescriptor->GetDataSize(), pDescriptor->GetData(), nCopyDataSize); |
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281 | } |
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282 | } |
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283 | _ATLCATCHALL() |
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284 | { |
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285 | pNewDescriptor->Terminate(); |
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286 | _ATLRETHROW; |
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287 | } |
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288 | pvNewData = pNewDescriptor->GetData(); |
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289 | } |
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290 | if(pvData) |
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291 | Free(pvData); |
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292 | return pvNewData; |
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293 | } |
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294 | static VOID Free(_In_opt_ VOID* pvData) throw() |
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295 | { |
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296 | if(!pvData) |
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297 | return; |
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298 | CDescriptor* pDescriptor = CDescriptor::FromData(pvData); |
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299 | ATLASSERT(pDescriptor); |
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300 | pDescriptor->Terminate(); |
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301 | } |
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302 | }; |
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303 | |
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304 | typedef CDebugAllocatorT<> CDebugAllocator; |
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305 | |
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306 | //////////////////////////////////////////////////////////// |
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307 | // CVirtualHeapPtr |
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308 | |
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309 | template <typename T> |
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310 | class CDebugHeapPtr : |
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311 | public CHeapPtr<T, CDebugAllocator> |
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312 | { |
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313 | public: |
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314 | // CDebugHeapPtr |
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315 | CDebugHeapPtr() throw() |
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316 | { |
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317 | } |
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318 | explicit CDebugHeapPtr(_In_ T* pData) throw() : |
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319 | CHeapPtr<T, CDebugAllocator>(pData) |
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320 | { |
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321 | } |
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322 | VOID SetProtection(DWORD nProtection) |
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323 | { |
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324 | if(!m_pData) |
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325 | return; |
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326 | CDebugAllocator::CDescriptor* pDescriptor = CDebugAllocator::CDescriptor::FromData(m_pData); |
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327 | ATLASSERT(pDescriptor); |
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328 | DWORD nCurrentProtection; |
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329 | ATLENSURE_THROW(VirtualProtect(pDescriptor->GetData(), pDescriptor->GetDataSize(), nProtection, &nCurrentProtection), AtlHresultFromLastError()); |
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330 | } |
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331 | }; |
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332 | |
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