143 lines
2.9 KiB
C
143 lines
2.9 KiB
C
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/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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logger.c
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Abstract:
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This file contains the code for the debug logging facility.
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Author:
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Steve Wood (stevewo) 20-Jun-1992
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Environment:
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kernel mode callable only.
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Revision History:
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20-Jun-1992 Steve Wood (stevewo) Created.
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--*/
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#include "exp.h"
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PEX_DEBUG_LOG
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ExCreateDebugLog(
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IN UCHAR MaximumNumberOfTags,
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IN ULONG MaximumNumberOfEvents
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)
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{
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PEX_DEBUG_LOG Log;
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ULONG Size;
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Size = sizeof( EX_DEBUG_LOG ) +
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(MaximumNumberOfTags *
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sizeof( EX_DEBUG_LOG_TAG )
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) +
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(MaximumNumberOfEvents *
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sizeof( EX_DEBUG_LOG_EVENT )
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);
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Log = ExAllocatePoolWithTag( NonPagedPool, Size, 'oLbD' );
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if (Log != NULL) {
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RtlZeroMemory( Log, Size );
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KeInitializeSpinLock( &Log->Lock );
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Log->MaximumNumberOfTags = MaximumNumberOfTags;
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Log->Tags = (PEX_DEBUG_LOG_TAG)(Log + 1);
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Log->First = (PEX_DEBUG_LOG_EVENT)(Log->Tags + MaximumNumberOfTags);
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Log->Last = Log->First + MaximumNumberOfEvents;
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Log->Next = Log->First;
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}
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return Log;
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}
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UCHAR
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ExCreateDebugLogTag(
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IN PEX_DEBUG_LOG Log,
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IN PCHAR Name,
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IN UCHAR Format1,
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IN UCHAR Format2,
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IN UCHAR Format3,
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IN UCHAR Format4
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)
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{
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KIRQL OldIrql;
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ULONG Size;
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PEX_DEBUG_LOG_TAG Tag;
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UCHAR TagIndex;
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PCHAR CapturedName;
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Size = strlen( Name );
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CapturedName = ExAllocatePoolWithTag( NonPagedPool, Size, 'oLbD' );
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RtlCopyMemory( CapturedName, Name, Size + 1 );
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ExAcquireSpinLock( &Log->Lock, &OldIrql );
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if (Log->NumberOfTags < Log->MaximumNumberOfTags) {
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TagIndex = (UCHAR)(Log->NumberOfTags++);
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Tag = &Log->Tags[ TagIndex ];
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Tag->Name = CapturedName;
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Tag->Format[ 0 ] = Format1;
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Tag->Format[ 1 ] = Format2;
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Tag->Format[ 2 ] = Format3;
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Tag->Format[ 3 ] = Format4;
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CapturedName = NULL;
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}
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else {
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TagIndex = (UCHAR)0xFF;
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}
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ExReleaseSpinLock( &Log->Lock, OldIrql );
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if (CapturedName != NULL) {
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ExFreePool( CapturedName );
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}
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return TagIndex;
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}
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VOID
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ExDebugLogEvent(
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IN PEX_DEBUG_LOG Log,
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IN UCHAR Tag,
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IN ULONG Data1,
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IN ULONG Data2,
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IN ULONG Data3,
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IN ULONG Data4
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)
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{
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KIRQL OldIrql;
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PEX_DEBUG_LOG_EVENT p;
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PETHREAD Thread = PsGetCurrentThread();
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LARGE_INTEGER CurrentTime;
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KeQuerySystemTime( &CurrentTime );
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ExAcquireSpinLock( &Log->Lock, &OldIrql );
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p = Log->Next;
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if (p == Log->Last) {
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p = Log->First;
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}
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Log->Next = p + 1;
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p->ThreadId = Thread->Cid.UniqueThread;
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p->ProcessId = Thread->Cid.UniqueProcess;
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p->Time = CurrentTime.LowPart;
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p->Tag = Tag;
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p->Data[ 0 ] = Data1;
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p->Data[ 1 ] = Data2;
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p->Data[ 2 ] = Data3;
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p->Data[ 3 ] = Data4;
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ExReleaseSpinLock( &Log->Lock, OldIrql );
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return;
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}
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