From 3a788d44ee45b69365b2fd3377ba1c116732a1d2 Mon Sep 17 00:00:00 2001
From: David Welch <welch@cwcom.net>
Date: Tue, 10 Apr 2001 18:15:22 +0000
Subject: [PATCH] Trace facility

svn path=/trunk/; revision=1782
---
 reactos/include/ntdll/trace.h |  18 +++++
 reactos/lib/ntdll/rtl/trace.c | 127 ++++++++++++++++++++++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 reactos/include/ntdll/trace.h
 create mode 100644 reactos/lib/ntdll/rtl/trace.c

diff --git a/reactos/include/ntdll/trace.h b/reactos/include/ntdll/trace.h
new file mode 100644
index 00000000000..54f4d0d9370
--- /dev/null
+++ b/reactos/include/ntdll/trace.h
@@ -0,0 +1,18 @@
+#ifndef __INCLUDE_NTDLL_TRACE_H
+#define __INCLUDE_NTDLL_TRACE_H
+
+typedef struct _NTDLL_TRACE_TABLE
+{
+  CHAR Flags[4096];
+} NTDLL_TABLE_TABLE, *PNTDLL_TABLE_TRACE;
+
+#define TRACE_NTDLL    (1)
+#define TRACE_KERNEL32 (2)
+#define TRACE_CRTDLL   (3)
+
+VOID
+RtlPrintTrace(ULONG Flag, PCH Format, ...);
+
+#define TPRINTF(F, X...) RtlPrintTrace(F, ## X)
+
+#endif /* __INCLUDE_NTDLL_TRACE_H */
diff --git a/reactos/lib/ntdll/rtl/trace.c b/reactos/lib/ntdll/rtl/trace.c
new file mode 100644
index 00000000000..3c8ca79ccda
--- /dev/null
+++ b/reactos/lib/ntdll/rtl/trace.c
@@ -0,0 +1,127 @@
+/*
+ *  ReactOS kernel
+ *  Copyright (C) 2000 David Welch <welch@cwcom.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/* $Id: trace.c,v 1.1 2001/04/10 18:15:22 dwelch Exp $
+ *
+ * PROJECT:           ReactOS kernel
+ * PURPOSE:           Tracing library calls
+ * FILE:              lib/ntdll/rtl/trace.c
+ * PROGRAMER:         David Welch <welch@cwcom.net>
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <ddk/ntddk.h>
+#include <ntdll/trace.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <ntdll.h>
+
+/* GLOBALS *******************************************************************/
+
+static NTDLL_TRACE_TABLE TraceTable;
+static BOOLEAN TraceTableValid = FALSE;
+
+/* FUNCTIONS *****************************************************************/
+
+NTSTATUS
+RtlpInitTrace(VOID)
+{
+  HANDLE SectionHandle;
+  UNICODE_STRING SectionName;
+  OBJECT_ATTRIBUTES ObjectAttributes;
+  CHAR Buffer[4096];
+  NTSTATUS Status;
+  PROCESS_BASIC_INFORMATION Pbi;
+  ULONG ReturnedSize;
+  PVOID BaseAddress;
+  LARGE_INTEGER Offset;
+  ULONG ViewSize;
+
+  Status = NtQueryInformationProcess(NtCurrentProcess(),
+				     ProcessBasicInformation,
+				     (PVOID)&Pbi,
+				     sizeof(Pbi),
+				     &ReturnedSize);
+  if (!NT_SUCCESS(Status))
+    {
+      return(Status);
+    }
+
+  sprintf(Buffer, "\\??\\TraceSection%d", Pbi.UniqueProcessId);
+
+  InitializeObjectAttributes(&ObjectAttributes,
+			     &SectionName,
+			     0,
+			     NULL,
+			     NULL);
+  Status = NtOpenSection(&SectionHandle,
+			 SECTION_MAP_READ,
+			 &ObjectAttributes);
+  if (!NT_SUCCESS(Status))
+    {
+      return(Status);
+    }
+
+  BaseAddress = 0;
+  Offset.QuadPart = 0;
+  ViewSize = 0;
+  Status = NtMapViewOfSection(SectionHandle,
+			      NtCurrentProcess(),
+			      &BaseAddress,
+			      0,
+			      sizeof(NTDLL_TRACE_TABLE),
+			      &Offset,
+			      &ViewSize,
+			      ViewUnmap,
+			      0,
+			      PAGE_READONLY);
+  if (!NT_SUCCESS(Status))
+    {
+      NtClose(SectionHandle);
+      return(Status);
+    }
+  NtClose(SectionHandle);
+
+  memcpy(&TraceTable, BaseAddress, sizeof(TraceTable));
+  TraceTableValid = TRUE;
+
+  Status = NtUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
+
+  return(STATUS_SUCCESS);
+}
+
+VOID
+RtlPrintTrace(ULONG Flag, PCH Format, ...)
+{
+  va_list ap;
+  CHAR FString[4096];
+
+  if (!TraceTableValid)
+    {
+      return;
+    }
+  if (TraceTable.Flags[Flag / BITS_IN_CHAR] & (1 << (Flag % BITS_IN_CHAR)))
+    {
+      va_start(ap, Format);
+      vsprintf(FString, Format, ap);
+      DbgPrint(FString);
+      va_end(ap);
+    }
+}