reactos/ntoskrnl/mm/ppool.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/mm/ppool.c
   5  * PURPOSE:         Implements the paged pool
   6  *
   7  * PROGRAMMERS:     David Welch (welch@mcmail.com)
   8  *                  Royce Mitchell III
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 #if defined (ALLOC_PRAGMA)
  18 #pragma alloc_text(INIT, MmInitializePagedPool)
  19 #endif
  20
  21 #undef ASSERT
  22 #define ASSERT(x) if (!(x)) {DbgPrint("Assertion "#x" failed at %s:%d\n", __FILE__,__LINE__); KeBugCheck(0); }
  23
  24 // enable "magic"
  25 //#define R_MAGIC
  26 #define R_MUTEX FAST_MUTEX
  27 #define R_ACQUIRE_MUTEX(pool) /*DPRINT1("Acquiring PPool Mutex\n");*/ ExAcquireFastMutex(&pool->Mutex)
  28 #define R_RELEASE_MUTEX(pool) /*DPRINT1("Releasing PPool Mutex\n");*/ ExReleaseFastMutex(&pool->Mutex)
  29 #define R_PRINT_ADDRESS(addr) KeRosPrintAddress(addr)
  30 #define R_PANIC() KeBugCheck(0)
  31 #define R_DEBUG DbgPrint
  32
  33 #ifdef _ARM_
  34 #define R_GET_STACK_FRAMES(ptr,cnt)
  35 #else
  36 #define R_GET_STACK_FRAMES(ptr,cnt) RtlWalkFrameChain((PVOID*)ptr,cnt, 0)
  37 #endif
  38
  39 #include "rpoolmgr.h"
  40
  41 /* GLOBALS *******************************************************************/
  42
  43 PVOID MmPagedPoolBase;
  44 ULONG MmPagedPoolSize;
  45 ULONG MmTotalPagedPoolQuota = 0; // TODO FIXME commented out until we use it
  46 static PR_POOL MmPagedPool = NULL;
  47
  48 /* FUNCTIONS *****************************************************************/
  49
  50 VOID
  51 INIT_FUNCTION
  52 NTAPI
  53 MmInitializePagedPool(VOID)
  54 {
  55         /*
  56          * We are still at a high IRQL level at this point so explicitly commit
  57          * the first page of the paged pool before writing the first block header.
  58          */
  59         MmCommitPagedPoolAddress ( (PVOID)MmPagedPoolBase, FALSE );
  60
  61         MmPagedPool = RPoolInit ( MmPagedPoolBase,
  62                 MmPagedPoolSize,
  63                 MM_POOL_ALIGNMENT,
  64                 MM_CACHE_LINE_SIZE,
  65                 PAGE_SIZE );
  66
  67         ExInitializeFastMutex(&MmPagedPool->Mutex);
  68 }
  69
  70 /**********************************************************************
  71  * NAME       INTERNAL
  72  * ExAllocatePagedPoolWithTag@12
  73  *
  74  * DESCRIPTION
  75  *
  76  * ARGUMENTS
  77  *
  78  * RETURN VALUE
  79  */
  80 PVOID NTAPI
  81 ExAllocatePagedPoolWithTag (IN POOL_TYPE PoolType,
  82                             IN ULONG  NumberOfBytes,
  83                             IN ULONG  Tag)
  84 {
  85         int align;
  86
  87         if ( NumberOfBytes >= PAGE_SIZE )
  88                 align = 2;
  89         else if ( PoolType & CACHE_ALIGNED_POOL_MASK )
  90                 align = 1;
  91         else
  92                 align = 0;
  93
  94         ASSERT_IRQL_LESS_OR_EQUAL(APC_LEVEL);
  95
  96         return RPoolAlloc ( MmPagedPool, NumberOfBytes, Tag, align );
  97 }
  98
  99 VOID NTAPI
 100 ExFreePagedPool(IN PVOID Block)
 101 {
 102         ASSERT_IRQL_LESS_OR_EQUAL(APC_LEVEL);
 103         RPoolFree ( MmPagedPool, Block );
 104 }
 105
 106 ULONG NTAPI
 107 EiGetPagedPoolTag(IN PVOID Block)
 108 {
 109     return RBodyToHdr(Block)->Tag;
 110 }
 111
 112
 113 #ifdef PPOOL_UMODE_TEST
 114
 115 PVOID TestAlloc ( ULONG Bytes )
 116 {
 117         PVOID ret;
 118
 119         //printf ( "Allocating block: " ); RPoolStats ( MmPagedPool );
 120         //RPoolRedZoneCheck ( MmPagedPool, __FILE__, __LINE__ );
 121
 122         ret = ExAllocatePagedPoolWithTag ( PagedPool, Bytes, 0 );
 123
 124         //printf ( "Block %x allocated: ", ret ); RPoolStats ( MmPagedPool );
 125         //RPoolRedZoneCheck ( MmPagedPool, __FILE__, __LINE__ );
 126
 127         return ret;
 128 }
 129
 130 void TestFree ( PVOID ptr )
 131 {
 132         //printf ( "Freeing block %x: ", ptr ); RPoolStats ( MmPagedPool );
 133         //RPoolRedZoneCheck ( MmPagedPool, __FILE__, __LINE__ );
 134         ExFreePagedPool(ptr);
 135         //printf ( "Block %x freed: ", ptr ); RPoolStats ( MmPagedPool );
 136         //RPoolRedZoneCheck ( MmPagedPool, __FILE__, __LINE__ );
 137 }
 138
 139 int main()
 140 {
 141 #define COUNT 100
 142         int i, j;
 143         char* keepers[COUNT];
 144         char* trash[COUNT];
 145         int AllocSize[] = { 15, 31, 63, 127, 255, 511, 1023, 2047 };
 146         const int ALLOCS = sizeof(AllocSize) / sizeof(0[AllocSize]);
 147         ULONG dwStart;
 148
 149         MmPagedPoolSize = 1*1024*1024;
 150         MmPagedPoolBase = malloc ( MmPagedPoolSize );
 151         MmInitializePagedPool();
 152
 153         dwStart = GetTickCount();
 154
 155         printf ( "test #1 phase #1\n" );
 156         for ( i = 0; i < COUNT; i++ )
 157         {
 158                 //printf ( "keeper %i) ", i );
 159                 keepers[i] = TestAlloc ( AllocSize[i%ALLOCS] );
 160                 if ( !keepers[i] ) printf ( "allocation failed\n" );
 161                 //printf ( "trash %i) ", i );
 162                 trash[i] = TestAlloc ( AllocSize[i%ALLOCS] );
 163                 if ( !trash[i] ) printf ( "allocation failed\n" );
 164         }
 165
 166         printf ( "test #1 phase #2\n" );
 167         for ( i = 0; i < COUNT; i++ )
 168         {
 169                 if ( i == 6 )
 170                         i = i;
 171                 //printf ( "%i) ", i );
 172                 TestFree ( trash[i] );
 173         }
 174
 175         printf ( "test #1 phase #3\n" );
 176         for ( i = 0; i < 4; i++ )
 177         {
 178                 //printf ( "%i) ", i );
 179                 keepers[i] = TestAlloc ( 4096 );
 180                 if ( !keepers[i] ) printf ( "allocation failed\n" );
 181         }
 182
 183         printf ( "test #1 phase #4\n" );
 184         for ( i = 0; i < 4; i++ )
 185         {
 186                 //printf ( "%i) ", i );
 187                 TestFree ( keepers[i] );
 188         }
 189
 190         printf ( "test #1 phase #5\n" );
 191         srand(1);
 192         for ( i = 0; i < COUNT; i++ )
 193         {
 194                 //printf ( "%i) ", i );
 195                 trash[i] = TestAlloc ( rand()%1024+1 );
 196                 if ( !trash[i] ) printf ( "allocation failed\n" );
 197         }
 198         printf ( "test #1 phase #6\n" );
 199         for ( i = 0; i < 10000; i++ )
 200         {
 201                 TestFree ( trash[i%COUNT] );
 202                 trash[i%COUNT] = TestAlloc ( rand()%1024+1 );
 203                 if ( !trash[i%COUNT] ) printf ( "allocation failed\n" );
 204         }
 205         printf ( "test #1 phase #7\n" );
 206         j = 0;
 207         for ( i = 0; i < COUNT; i++ )
 208         {
 209                 if ( trash[i] )
 210                 {
 211                         TestFree ( trash[i] );
 212                         ++j;
 213                 }
 214         }
 215         printf ( "test #1 phase #8 ( freed %i of %i trash )\n", j, COUNT );
 216         if ( !TestAlloc ( 2048 ) )
 217                 printf ( "Couldn't allocate 2048 bytes after freeing up a whole bunch of blocks\n" );
 218
 219         free ( MmPagedPoolBase );
 220
 221         printf ( "test time: %lu\n", GetTickCount() - dwStart );
 222
 223         printf ( "test #2\n" );
 224
 225         MmPagedPoolSize = 1024;
 226         MmPagedPoolBase = malloc ( MmPagedPoolSize );
 227         MmInitializePagedPool();
 228
 229         TestAlloc ( 512 );
 230         i = RPoolLargestAllocPossible ( MmPagedPool, 0 );
 231         if ( !TestAlloc ( i ) )
 232         {
 233                 printf ( "allocating last available block failed\n" );
 234         }
 235
 236         free ( MmPagedPoolBase );
 237
 238         printf ( "done!\n" );
 239         return 0;
 240 }
 241 #endif//PPOOL_UMODE_TEST
 242
 243 /* EOF */