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/*++
Copyright (c) 2001 Microsoft Corporation
Module Name:
flt_dbg.c
Abstract:
This module contains all debug-related code.
Revision History:
Who When What
-------- -------- ----------------------------------------------
Notes:
--*/
#include "precomp.h"
#define __FILENUMBER 'GBED'
#if DBG
INT filterDebugLevel = DL_WARN;
NDIS_SPIN_LOCK filterDbgLogLock;
PFILTERD_ALLOCATION filterdMemoryHead = (PFILTERD_ALLOCATION)NULL;
PFILTERD_ALLOCATION filterdMemoryTail = (PFILTERD_ALLOCATION)NULL;
ULONG filterdAllocCount = 0; // how many allocated so far (unfreed)
NDIS_SPIN_LOCK filterdMemoryLock;
BOOLEAN filterdInitDone = FALSE;
PVOID
filterAuditAllocMem(
NDIS_HANDLE NdisHandle,
ULONG Size,
ULONG FileNumber,
ULONG LineNumber
)
{
PVOID pBuffer;
PFILTERD_ALLOCATION pAllocInfo;
if (!filterdInitDone)
{
NdisAllocateSpinLock(&(filterdMemoryLock));
filterdInitDone = TRUE;
}
//
// Integer overflow check
//
if ((Size + (ULONG) sizeof(FILTERD_ALLOCATION)) < Size)
{
DEBUGP(DL_VERY_LOUD+50,
"filterAuditAllocMem: Integer overflow error file %d, line %d, Size %d \n",
FileNumber, LineNumber, Size);
pBuffer = NULL;
}
else
{
pAllocInfo = NdisAllocateMemoryWithTagPriority(
NdisHandle,
Size+sizeof(FILTERD_ALLOCATION),
(ULONG)'gdTF',
LowPoolPriority
);
if (pAllocInfo == (PFILTERD_ALLOCATION)NULL)
{
DEBUGP(DL_VERY_LOUD+50,
"filterAuditAllocMem: file %d, line %d, Size %d failed!\n",
FileNumber, LineNumber, Size);
pBuffer = NULL;
}
else
{
pBuffer = (PVOID)&(pAllocInfo->UserData);
NdisFillMemory(pBuffer, Size, 0xaf);
pAllocInfo->Signature = FILTERD_MEMORY_SIGNATURE;
pAllocInfo->FileNumber = FileNumber;
pAllocInfo->LineNumber = LineNumber;
pAllocInfo->Size = Size;
pAllocInfo->OwnerHandle = NdisHandle;
pAllocInfo->Next = (PFILTERD_ALLOCATION)NULL;
NdisAcquireSpinLock(&(filterdMemoryLock));
pAllocInfo->Prev = filterdMemoryTail;
if (filterdMemoryTail == (PFILTERD_ALLOCATION)NULL)
{
//
// empty list
//
filterdMemoryHead = filterdMemoryTail = pAllocInfo;
}
else
{
filterdMemoryTail->Next = pAllocInfo;
}
filterdMemoryTail = pAllocInfo;
filterdAllocCount++;
NdisReleaseSpinLock(&(filterdMemoryLock));
}
}
DEBUGP(DL_VERY_LOUD+100,
"filterAuditAllocMem: file %c%c%c%c, line %d, %d bytes, OwnerHandle %p, Memory 0x%p\n",
(CHAR)(FileNumber & 0xff),
(CHAR)((FileNumber >> 8) & 0xff),
(CHAR)((FileNumber >> 16) & 0xff),
(CHAR)((FileNumber >> 24) & 0xff),
LineNumber, Size, NdisHandle, pBuffer);
return (pBuffer);
}
VOID
filterAuditFreeMem(
PVOID Pointer
)
{
PFILTERD_ALLOCATION pAllocInfo;
NdisAcquireSpinLock(&(filterdMemoryLock));
pAllocInfo = CONTAINING_RECORD(Pointer, FILTERD_ALLOCATION, UserData);
if (pAllocInfo->Signature != FILTERD_MEMORY_SIGNATURE)
{
DEBUGP(DL_ERROR,
"filterAuditFreeMem: unknown buffer 0x%p!\n", Pointer);
NdisReleaseSpinLock(&(filterdMemoryLock));
#if DBG
DbgBreakPoint();
#endif
return;
}
pAllocInfo->Signature = (ULONG)'DEAD';
if (pAllocInfo->Prev != (PFILTERD_ALLOCATION)NULL)
{
pAllocInfo->Prev->Next = pAllocInfo->Next;
}
else
{
filterdMemoryHead = pAllocInfo->Next;
}
if (pAllocInfo->Next != (PFILTERD_ALLOCATION)NULL)
{
pAllocInfo->Next->Prev = pAllocInfo->Prev;
}
else
{
filterdMemoryTail = pAllocInfo->Prev;
}
filterdAllocCount--;
NdisReleaseSpinLock(&(filterdMemoryLock));
NdisFreeMemory(pAllocInfo, 0, 0);
}
VOID
filterAuditShutdown(
VOID
)
{
if (filterdInitDone)
{
if (filterdAllocCount != 0)
{
DEBUGP(DL_ERROR, "AuditShutdown: unfreed memory, %d blocks!\n",
filterdAllocCount);
DEBUGP(DL_ERROR, "MemoryHead: 0x%p, MemoryTail: 0x%p\n",
filterdMemoryHead, filterdMemoryTail);
DbgBreakPoint();
{
PFILTERD_ALLOCATION pAllocInfo;
while (filterdMemoryHead != (PFILTERD_ALLOCATION)NULL)
{
pAllocInfo = filterdMemoryHead;
DEBUGP(DL_INFO, "AuditShutdown: will free 0x%p\n", pAllocInfo);
filterAuditFreeMem(&(pAllocInfo->UserData));
}
}
}
filterdInitDone = FALSE;
}
}
#define MAX_HD_LENGTH 128
VOID
DbgPrintHexDump(
IN PUCHAR pBuffer,
IN ULONG Length
)
/*++
Routine Description:
Print a hex dump of the given contiguous buffer. If the length
is too long, we truncate it.
Arguments:
pBuffer - Points to start of data to be dumped
Length - Length of above.
Return Value:
None
--*/
{
ULONG i;
if (Length > MAX_HD_LENGTH)
{
Length = MAX_HD_LENGTH;
}
for (i = 0; i < Length; i++)
{
//
// Check if we are at the end of a line
//
if ((i > 0) && ((i & 0xf) == 0))
{
DbgPrint("\n");
}
//
// Print addr if we are at start of a new line
//
if ((i & 0xf) == 0)
{
DbgPrint("%08p ", pBuffer);
}
DbgPrint(" %02x", *pBuffer++);
}
//
// Terminate the last line.
//
if (Length > 0)
{
DbgPrint("\n");
}
}
#endif // DBG
#if DBG_SPIN_LOCK
ULONG filterdSpinLockInitDone = 0;
NDIS_SPIN_LOCK filterdLockLock;
VOID
filterAllocateSpinLock(
_In_ PFILTER_LOCK pLock,
_In_ ULONG FileNumber,
_In_ ULONG LineNumber
)
{
if (filterdSpinLockInitDone == 0)
{
filterdSpinLockInitDone = 1;
NdisAllocateSpinLock(&(filterdLockLock));
}
NdisAcquireSpinLock(&(filterdLockLock));
pLock->Signature = FILT_LOCK_SIG;
pLock->TouchedByFileNumber = FileNumber;
pLock->TouchedInLineNumber = LineNumber;
pLock->IsAcquired = 0;
pLock->OwnerThread = 0;
NdisAllocateSpinLock(&(pLock->NdisLock));
NdisReleaseSpinLock(&(filterdLockLock));
}
VOID
filterFreeSpinLock(
_In_ PFILTER_LOCK pLock
)
{
ASSERT(filterdSpinLockInitDone == 1);
NdisFreeSpinLock(&(filterdLockLock));
filterdSpinLockInitDone = 0;
NdisFreeSpinLock(&(pLock->NdisLock));
}
VOID
filterAcquireSpinLock(
_In_ PFILTER_LOCK pLock,
_In_ ULONG FileNumber,
_In_ ULONG LineNumber,
_In_ BOOLEAN DispatchLevel
)
{
if (DispatchLevel)
{
NdisDprAcquireSpinLock(&(filterdLockLock));
}
else
{
NdisAcquireSpinLock(&(filterdLockLock));
}
if (pLock->Signature != FILT_LOCK_SIG)
{
DbgPrint("Trying to acquire uninited lock 0x%x, File %c%c%c%c, Line %d\n",
pLock,
(CHAR)(FileNumber & 0xff),
(CHAR)((FileNumber >> 8) & 0xff),
(CHAR)((FileNumber >> 16) & 0xff),
(CHAR)((FileNumber >> 24) & 0xff),
LineNumber);
DbgBreakPoint();
}
pLock->IsAcquired++;
if (DispatchLevel)
{
NdisDprReleaseSpinLock(&(filterdLockLock));
NdisDprAcquireSpinLock(&(pLock->NdisLock));
}
else
{
NdisReleaseSpinLock(&(filterdLockLock));
NdisAcquireSpinLock(&(pLock->NdisLock));
}
//
// Mark this lock.
//
pLock->TouchedByFileNumber = FileNumber;
pLock->TouchedInLineNumber = LineNumber;
}
VOID
filterReleaseSpinLock(
_In_ PFILTER_LOCK pLock,
_In_ ULONG FileNumber,
_In_ ULONG LineNumber,
_In_ BOOLEAN DispatchLevel
)
{
NdisDprAcquireSpinLock(&(filterdLockLock));
if (pLock->Signature != FILT_LOCK_SIG)
{
DbgPrint("Trying to release uninited lock 0x%x, File %c%c%c%c, Line %d\n",
pLock,
(CHAR)(FileNumber & 0xff),
(CHAR)((FileNumber >> 8) & 0xff),
(CHAR)((FileNumber >> 16) & 0xff),
(CHAR)((FileNumber >> 24) & 0xff),
LineNumber);
DbgBreakPoint();
}
if (pLock->IsAcquired == 0)
{
DbgPrint("Detected release of unacquired lock 0x%x, File %c%c%c%c, Line %d\n",
pLock,
(CHAR)(FileNumber & 0xff),
(CHAR)((FileNumber >> 8) & 0xff),
(CHAR)((FileNumber >> 16) & 0xff),
(CHAR)((FileNumber >> 24) & 0xff),
LineNumber);
DbgBreakPoint();
}
pLock->TouchedByFileNumber = FileNumber;
pLock->TouchedInLineNumber = LineNumber;
pLock->IsAcquired--;
NdisDprReleaseSpinLock(&(filterdLockLock));
if (DispatchLevel)
{
NdisDprReleaseSpinLock(&(pLock->NdisLock));
}
else
{
NdisReleaseSpinLock(&(pLock->NdisLock));
}
}
#endif // DBG_SPIN_LOCK
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