1 | /* $Id: MMUkHeap.cpp 80333 2019-08-16 20:28:38Z vboxsync $ */
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2 | /** @file
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3 | * MM - Memory Manager - Ring-3 Heap with kernel accessible mapping.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2019 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 | #define LOG_GROUP LOG_GROUP_MM_HEAP
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23 | #include <VBox/vmm/mm.h>
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24 | #include <VBox/vmm/stam.h>
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25 | #include "MMInternal.h"
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26 | #include <VBox/vmm/vm.h>
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27 | #include <VBox/vmm/uvm.h>
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28 | #include <iprt/errcore.h>
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29 | #include <VBox/param.h>
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30 | #include <VBox/log.h>
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31 |
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32 | #include <iprt/assert.h>
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33 | #include <iprt/string.h>
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34 | #include <iprt/heap.h>
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35 |
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36 |
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37 | /*********************************************************************************************************************************
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38 | * Internal Functions *
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39 | *********************************************************************************************************************************/
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40 | static void *mmR3UkHeapAlloc(PMMUKHEAP pHeap, MMTAG enmTag, size_t cb, bool fZero, PRTR0PTR pR0Ptr);
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41 |
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42 |
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43 |
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44 | /**
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45 | * Create a User-kernel heap.
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46 | *
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47 | * This does not require SUPLib to be initialized as we'll lazily allocate the
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48 | * kernel accessible memory on the first alloc call.
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49 | *
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50 | * @returns VBox status code.
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51 | * @param pUVM Pointer to the user mode VM structure.
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52 | * @param ppHeap Where to store the heap pointer.
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53 | */
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54 | int mmR3UkHeapCreateU(PUVM pUVM, PMMUKHEAP *ppHeap)
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55 | {
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56 | PMMUKHEAP pHeap = (PMMUKHEAP)MMR3HeapAllocZU(pUVM, MM_TAG_MM, sizeof(MMUKHEAP));
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57 | if (pHeap)
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58 | {
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59 | int rc = RTCritSectInit(&pHeap->Lock);
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60 | if (RT_SUCCESS(rc))
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61 | {
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62 | /*
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63 | * Initialize the global stat record.
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64 | */
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65 | pHeap->pUVM = pUVM;
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66 | #ifdef MMUKHEAP_WITH_STATISTICS
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67 | PMMUKHEAPSTAT pStat = &pHeap->Stat;
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68 | STAMR3RegisterU(pUVM, &pStat->cAllocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cAllocations", STAMUNIT_CALLS, "Number or MMR3UkHeapAlloc() calls.");
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69 | STAMR3RegisterU(pUVM, &pStat->cReallocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cReallocations", STAMUNIT_CALLS, "Number of MMR3UkHeapRealloc() calls.");
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70 | STAMR3RegisterU(pUVM, &pStat->cFrees, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cFrees", STAMUNIT_CALLS, "Number of MMR3UkHeapFree() calls.");
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71 | STAMR3RegisterU(pUVM, &pStat->cFailures, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cFailures", STAMUNIT_COUNT, "Number of failures.");
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72 | STAMR3RegisterU(pUVM, &pStat->cbCurAllocated, sizeof(pStat->cbCurAllocated) == sizeof(uint32_t) ? STAMTYPE_U32 : STAMTYPE_U64,
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73 | STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cbCurAllocated", STAMUNIT_BYTES, "Number of bytes currently allocated.");
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74 | STAMR3RegisterU(pUVM, &pStat->cbAllocated, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cbAllocated", STAMUNIT_BYTES, "Total number of bytes allocated.");
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75 | STAMR3RegisterU(pUVM, &pStat->cbFreed, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/UkHeap/cbFreed", STAMUNIT_BYTES, "Total number of bytes freed.");
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76 | #endif
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77 | *ppHeap = pHeap;
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78 | return VINF_SUCCESS;
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79 | }
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80 | AssertRC(rc);
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81 | MMR3HeapFree(pHeap);
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82 | }
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83 | AssertMsgFailed(("failed to allocate heap structure\n"));
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84 | return VERR_NO_MEMORY;
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85 | }
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86 |
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87 |
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88 | /**
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89 | * Destroy a User-kernel heap.
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90 | *
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91 | * @param pHeap Heap handle.
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92 | */
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93 | void mmR3UkHeapDestroy(PMMUKHEAP pHeap)
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94 | {
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95 | /*
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96 | * Start by deleting the lock, that'll trap anyone
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97 | * attempting to use the heap.
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98 | */
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99 | RTCritSectDelete(&pHeap->Lock);
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100 |
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101 | /*
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102 | * Walk the sub-heaps and free them.
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103 | */
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104 | while (pHeap->pSubHeapHead)
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105 | {
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106 | PMMUKHEAPSUB pSubHeap = pHeap->pSubHeapHead;
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107 | pHeap->pSubHeapHead = pSubHeap->pNext;
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108 | SUPR3PageFreeEx(pSubHeap->pv, pSubHeap->cb >> PAGE_SHIFT);
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109 | //MMR3HeapFree(pSubHeap); - rely on the automatic cleanup.
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110 | }
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111 | //MMR3HeapFree(pHeap->stats);
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112 | //MMR3HeapFree(pHeap);
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113 | }
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114 |
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115 |
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116 | /**
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117 | * Allocate memory associating it with the VM for collective cleanup.
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118 | *
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119 | * The memory will be allocated from the default heap but a header
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120 | * is added in which we keep track of which VM it belongs to and chain
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121 | * all the allocations together so they can be freed in one go.
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122 | *
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123 | * This interface is typically used for memory block which will not be
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124 | * freed during the life of the VM.
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125 | *
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126 | * @returns Pointer to allocated memory.
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127 | * @param pVM The cross context VM structure.
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128 | * @param enmTag Statistics tag. Statistics are collected on a per tag
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129 | * basis in addition to a global one. Thus we can easily
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130 | * identify how memory is used by the VM.
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131 | * @param cbSize Size of the block.
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132 | * @param pR0Ptr Where to return the ring-0 address of the memory.
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133 | */
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134 | VMMR3DECL(void *) MMR3UkHeapAlloc(PVM pVM, MMTAG enmTag, size_t cbSize, PRTR0PTR pR0Ptr)
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135 | {
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136 | return mmR3UkHeapAlloc(pVM->pUVM->mm.s.pUkHeap, enmTag, cbSize, false, pR0Ptr);
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137 | }
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138 |
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139 |
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140 | /**
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141 | * Same as MMR3UkHeapAlloc().
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142 | *
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143 | * @returns Pointer to allocated memory.
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144 | * @param pVM The cross context VM structure.
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145 | * @param enmTag Statistics tag. Statistics are collected on a per tag
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146 | * basis in addition to a global one. Thus we can easily
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147 | * identify how memory is used by the VM.
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148 | * @param cbSize Size of the block.
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149 | * @param ppv Where to store the pointer to the allocated memory on success.
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150 | * @param pR0Ptr Where to return the ring-0 address of the memory.
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151 | */
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152 | VMMR3DECL(int) MMR3UkHeapAllocEx(PVM pVM, MMTAG enmTag, size_t cbSize, void **ppv, PRTR0PTR pR0Ptr)
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153 | {
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154 | void *pv = mmR3UkHeapAlloc(pVM->pUVM->mm.s.pUkHeap, enmTag, cbSize, false, pR0Ptr);
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155 | if (pv)
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156 | {
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157 | *ppv = pv;
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158 | return VINF_SUCCESS;
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159 | }
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160 | return VERR_NO_MEMORY;
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161 | }
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162 |
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163 |
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164 | /**
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165 | * Same as MMR3UkHeapAlloc() only the memory is zeroed.
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166 | *
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167 | * @returns Pointer to allocated memory.
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168 | * @param pVM The cross context VM structure.
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169 | * @param enmTag Statistics tag. Statistics are collected on a per tag
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170 | * basis in addition to a global one. Thus we can easily
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171 | * identify how memory is used by the VM.
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172 | * @param cbSize Size of the block.
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173 | * @param pR0Ptr Where to return the ring-0 address of the memory.
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174 | */
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175 | VMMR3DECL(void *) MMR3UkHeapAllocZ(PVM pVM, MMTAG enmTag, size_t cbSize, PRTR0PTR pR0Ptr)
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176 | {
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177 | return mmR3UkHeapAlloc(pVM->pUVM->mm.s.pUkHeap, enmTag, cbSize, true, pR0Ptr);
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178 | }
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179 |
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180 |
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181 | /**
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182 | * Same as MMR3UkHeapAllocZ().
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183 | *
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184 | * @returns Pointer to allocated memory.
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185 | * @param pVM The cross context VM structure.
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186 | * @param enmTag Statistics tag. Statistics are collected on a per tag
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187 | * basis in addition to a global one. Thus we can easily
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188 | * identify how memory is used by the VM.
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189 | * @param cbSize Size of the block.
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190 | * @param ppv Where to store the pointer to the allocated memory on success.
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191 | * @param pR0Ptr Where to return the ring-0 address of the memory.
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192 | */
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193 | VMMR3DECL(int) MMR3UkHeapAllocZEx(PVM pVM, MMTAG enmTag, size_t cbSize, void **ppv, PRTR0PTR pR0Ptr)
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194 | {
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195 | void *pv = mmR3UkHeapAlloc(pVM->pUVM->mm.s.pUkHeap, enmTag, cbSize, true, pR0Ptr);
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196 | if (pv)
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197 | {
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198 | *ppv = pv;
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199 | return VINF_SUCCESS;
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200 | }
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201 | return VERR_NO_MEMORY;
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202 | }
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203 |
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204 |
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205 | /***
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206 | * Worker for mmR3UkHeapAlloc that creates and adds a new sub-heap.
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207 | *
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208 | * @returns Pointer to the new sub-heap.
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209 | * @param pHeap The heap
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210 | * @param cbSubHeap The size of the sub-heap.
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211 | */
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212 | static PMMUKHEAPSUB mmR3UkHeapAddSubHeap(PMMUKHEAP pHeap, size_t cbSubHeap)
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213 | {
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214 | PMMUKHEAPSUB pSubHeap = (PMMUKHEAPSUB)MMR3HeapAllocU(pHeap->pUVM, MM_TAG_MM/*_UK_HEAP*/, sizeof(*pSubHeap));
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215 | if (pSubHeap)
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216 | {
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217 | pSubHeap->cb = cbSubHeap;
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218 | int rc = SUPR3PageAllocEx(pSubHeap->cb >> PAGE_SHIFT, 0, &pSubHeap->pv, &pSubHeap->pvR0, NULL);
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219 | if (RT_SUCCESS(rc))
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220 | {
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221 | rc = RTHeapSimpleInit(&pSubHeap->hSimple, pSubHeap->pv, pSubHeap->cb);
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222 | if (RT_SUCCESS(rc))
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223 | {
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224 | pSubHeap->pNext = pHeap->pSubHeapHead;
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225 | pHeap->pSubHeapHead = pSubHeap;
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226 | return pSubHeap;
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227 | }
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228 |
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229 | /* bail out */
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230 | SUPR3PageFreeEx(pSubHeap->pv, pSubHeap->cb >> PAGE_SHIFT);
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231 | }
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232 | MMR3HeapFree(pSubHeap);
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233 | }
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234 | return NULL;
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235 | }
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236 |
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237 |
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238 | /**
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239 | * Allocate memory from the heap.
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240 | *
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241 | * @returns Pointer to allocated memory.
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242 | * @param pHeap Heap handle.
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243 | * @param enmTag Statistics tag. Statistics are collected on a per tag
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244 | * basis in addition to a global one. Thus we can easily
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245 | * identify how memory is used by the VM.
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246 | * @param cb Size of the block.
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247 | * @param fZero Whether or not to zero the memory block.
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248 | * @param pR0Ptr Where to return the ring-0 pointer.
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249 | */
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250 | static void *mmR3UkHeapAlloc(PMMUKHEAP pHeap, MMTAG enmTag, size_t cb, bool fZero, PRTR0PTR pR0Ptr)
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251 | {
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252 | if (pR0Ptr)
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253 | *pR0Ptr = NIL_RTR0PTR;
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254 | RTCritSectEnter(&pHeap->Lock);
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255 |
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256 | #ifdef MMUKHEAP_WITH_STATISTICS
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257 | /*
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258 | * Find/alloc statistics nodes.
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259 | */
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260 | pHeap->Stat.cAllocations++;
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261 | PMMUKHEAPSTAT pStat = (PMMUKHEAPSTAT)RTAvlULGet(&pHeap->pStatTree, (AVLULKEY)enmTag);
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262 | if (pStat)
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263 | pStat->cAllocations++;
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264 | else
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265 | {
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266 | pStat = (PMMUKHEAPSTAT)MMR3HeapAllocZU(pHeap->pUVM, MM_TAG_MM, sizeof(MMUKHEAPSTAT));
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267 | if (!pStat)
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268 | {
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269 | pHeap->Stat.cFailures++;
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270 | AssertMsgFailed(("Failed to allocate heap stat record.\n"));
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271 | RTCritSectLeave(&pHeap->Lock);
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272 | return NULL;
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273 | }
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274 | pStat->Core.Key = (AVLULKEY)enmTag;
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275 | RTAvlULInsert(&pHeap->pStatTree, &pStat->Core);
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276 |
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277 | pStat->cAllocations++;
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278 |
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279 | /* register the statistics */
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280 | PUVM pUVM = pHeap->pUVM;
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281 | const char *pszTag = mmGetTagName(enmTag);
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282 | STAMR3RegisterFU(pUVM, &pStat->cbCurAllocated, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of bytes currently allocated.", "/MM/UkHeap/%s", pszTag);
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283 | STAMR3RegisterFU(pUVM, &pStat->cAllocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Number or MMR3UkHeapAlloc() calls.", "/MM/UkHeap/%s/cAllocations", pszTag);
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284 | STAMR3RegisterFU(pUVM, &pStat->cReallocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Number of MMR3UkHeapRealloc() calls.", "/MM/UkHeap/%s/cReallocations", pszTag);
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285 | STAMR3RegisterFU(pUVM, &pStat->cFrees, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Number of MMR3UkHeapFree() calls.", "/MM/UkHeap/%s/cFrees", pszTag);
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286 | STAMR3RegisterFU(pUVM, &pStat->cFailures, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Number of failures.", "/MM/UkHeap/%s/cFailures", pszTag);
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287 | STAMR3RegisterFU(pUVM, &pStat->cbAllocated, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Total number of bytes allocated.", "/MM/UkHeap/%s/cbAllocated", pszTag);
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288 | STAMR3RegisterFU(pUVM, &pStat->cbFreed, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Total number of bytes freed.", "/MM/UkHeap/%s/cbFreed", pszTag);
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289 | }
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290 | #else
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291 | RT_NOREF_PV(enmTag);
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292 | #endif
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293 |
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294 | /*
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295 | * Validate input.
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296 | */
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297 | if (cb == 0)
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298 | {
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299 | #ifdef MMUKHEAP_WITH_STATISTICS
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300 | pStat->cFailures++;
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301 | pHeap->Stat.cFailures++;
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302 | #endif
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303 | RTCritSectLeave(&pHeap->Lock);
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304 | return NULL;
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305 | }
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306 |
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307 | /*
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308 | * Allocate heap block.
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309 | */
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310 | cb = RT_ALIGN_Z(cb, MMUKHEAP_SIZE_ALIGNMENT);
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311 | void *pv = NULL;
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312 | PMMUKHEAPSUB pSubHeapPrev = NULL;
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313 | PMMUKHEAPSUB pSubHeap = pHeap->pSubHeapHead;
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314 | while (pSubHeap)
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315 | {
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316 | if (fZero)
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317 | pv = RTHeapSimpleAllocZ(pSubHeap->hSimple, cb, MMUKHEAP_SIZE_ALIGNMENT);
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318 | else
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319 | pv = RTHeapSimpleAlloc(pSubHeap->hSimple, cb, MMUKHEAP_SIZE_ALIGNMENT);
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320 | if (pv)
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321 | {
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322 | /* Move the sub-heap with free memory to the head. */
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323 | if (pSubHeapPrev)
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324 | {
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325 | pSubHeapPrev->pNext = pSubHeap->pNext;
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326 | pSubHeap->pNext = pHeap->pSubHeapHead;
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327 | pHeap->pSubHeapHead = pSubHeap;
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328 | }
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329 | break;
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330 | }
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331 | pSubHeapPrev = pSubHeap;
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332 | pSubHeap = pSubHeap->pNext;
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333 | }
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334 | if (RT_UNLIKELY(!pv))
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335 | {
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336 | /*
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337 | * Add another sub-heap.
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338 | */
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339 | pSubHeap = mmR3UkHeapAddSubHeap(pHeap, RT_MAX(RT_ALIGN_Z(cb, PAGE_SIZE) + PAGE_SIZE * 16, _256K));
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340 | if (pSubHeap)
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341 | {
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342 | if (fZero)
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343 | pv = RTHeapSimpleAllocZ(pSubHeap->hSimple, cb, MMUKHEAP_SIZE_ALIGNMENT);
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344 | else
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345 | pv = RTHeapSimpleAlloc(pSubHeap->hSimple, cb, MMUKHEAP_SIZE_ALIGNMENT);
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346 | }
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347 | if (RT_UNLIKELY(!pv))
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348 | {
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349 | AssertMsgFailed(("Failed to allocate heap block %d, enmTag=%x(%.4s).\n", cb, enmTag, &enmTag));
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350 | #ifdef MMUKHEAP_WITH_STATISTICS
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351 | pStat->cFailures++;
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352 | pHeap->Stat.cFailures++;
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353 | #endif
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354 | RTCritSectLeave(&pHeap->Lock);
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355 | return NULL;
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356 | }
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357 | }
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358 |
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359 | /*
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360 | * Update statistics
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361 | */
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362 | #ifdef MMUKHEAP_WITH_STATISTICS
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363 | size_t cbActual = RTHeapSimpleSize(pSubHeap->hSimple, pv);
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364 | pStat->cbAllocated += cbActual;
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365 | pStat->cbCurAllocated += cbActual;
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366 | pHeap->Stat.cbAllocated += cbActual;
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367 | pHeap->Stat.cbCurAllocated += cbActual;
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368 | #endif
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369 |
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370 | if (pR0Ptr)
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371 | *pR0Ptr = (uintptr_t)pv - (uintptr_t)pSubHeap->pv + pSubHeap->pvR0;
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372 | RTCritSectLeave(&pHeap->Lock);
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373 | return pv;
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374 | }
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375 |
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376 |
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377 | /**
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378 | * Releases memory allocated with MMR3UkHeapAlloc() and MMR3UkHeapAllocZ()
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379 | *
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380 | * @param pVM The cross context VM structure.
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381 | * @param pv Pointer to the memory block to free.
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382 | * @param enmTag The allocation accounting tag.
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383 | */
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384 | VMMR3DECL(void) MMR3UkHeapFree(PVM pVM, void *pv, MMTAG enmTag)
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385 | {
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386 | /* Ignore NULL pointers. */
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387 | if (!pv)
|
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388 | return;
|
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389 |
|
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390 | PMMUKHEAP pHeap = pVM->pUVM->mm.s.pUkHeap;
|
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391 | RTCritSectEnter(&pHeap->Lock);
|
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392 |
|
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393 | /*
|
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394 | * Find the sub-heap and block
|
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395 | */
|
---|
396 | #ifdef MMUKHEAP_WITH_STATISTICS
|
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397 | size_t cbActual = 0;
|
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398 | #endif
|
---|
399 | PMMUKHEAPSUB pSubHeap = pHeap->pSubHeapHead;
|
---|
400 | while (pSubHeap)
|
---|
401 | {
|
---|
402 | if ((uintptr_t)pv - (uintptr_t)pSubHeap->pv < pSubHeap->cb)
|
---|
403 | {
|
---|
404 | #ifdef MMUKHEAP_WITH_STATISTICS
|
---|
405 | cbActual = RTHeapSimpleSize(pSubHeap->hSimple, pv);
|
---|
406 | PMMUKHEAPSTAT pStat = (PMMUKHEAPSTAT)RTAvlULGet(&pHeap->pStatTree, (AVLULKEY)enmTag);
|
---|
407 | if (pStat)
|
---|
408 | {
|
---|
409 | pStat->cFrees++;
|
---|
410 | pStat->cbCurAllocated -= cbActual;
|
---|
411 | pStat->cbFreed += cbActual;
|
---|
412 | }
|
---|
413 | pHeap->Stat.cFrees++;
|
---|
414 | pHeap->Stat.cbFreed += cbActual;
|
---|
415 | pHeap->Stat.cbCurAllocated -= cbActual;
|
---|
416 | #else
|
---|
417 | RT_NOREF_PV(enmTag);
|
---|
418 | #endif
|
---|
419 | RTHeapSimpleFree(pSubHeap->hSimple, pv);
|
---|
420 |
|
---|
421 | RTCritSectLeave(&pHeap->Lock);
|
---|
422 | return;
|
---|
423 | }
|
---|
424 | }
|
---|
425 | AssertMsgFailed(("pv=%p\n", pv));
|
---|
426 | }
|
---|
427 |
|
---|