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586 lines
23 KiB
586 lines
23 KiB
/*++ BUILD Version: 0001 // Increment this if a change has global effects
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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extlib.c
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Abstract:
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This file implements all the library routines operating on
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extensible performance libraries.
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Author:
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JeePang
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Revision History:
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09/27/2000 - JeePang - Moved from perflib.c
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--*/
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#define UNICODE
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//
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// Include files
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//
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#pragma warning(disable:4306)
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <ntregapi.h>
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#include <ntprfctr.h>
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#include <windows.h>
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#include <string.h>
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#include <stdlib.h>
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#include <winperf.h>
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#include <rpc.h>
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#include "regrpc.h"
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#include "ntconreg.h"
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#include "prflbmsg.h" // event log messages
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#include "perflib.h"
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#pragma warning(default:4306)
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// default trusted file list
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// all files presume to start with "perf"
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// static LONGLONG llTrustedNamePrefix = 0x0066007200650050; // "Perf"
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#define NAME_PREFIX L"Perf"
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DWORD dwTrustedFileNames[] = {
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0x0053004F, // "OS" for PerfOS.dll
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0x0065004E, // "Ne" for PerfNet.dll
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0x00720050, // "Pr" for PerfProc.dll
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0x00690044 // "Di" for PerfDisk.dll
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};
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CONST DWORD dwTrustedFileNameCount =
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sizeof(dwTrustedFileNames) / sizeof (dwTrustedFileNames[0]);
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// there must be at least 8 chars in the name to be checked as trusted by
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// default trusted file names are at least 8 chars in length
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CONST DWORD dwMinTrustedFileNameLen = 6;
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BOOL
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ServiceIsTrustedByDefault (
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LPCWSTR szServiceName
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)
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{
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BOOL bReturn = FALSE;
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DWORD dwNameToTest;
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DWORD dwIdx;
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if (szServiceName != NULL) {
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// check for min size
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dwIdx = 0;
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while ((dwIdx < dwMinTrustedFileNameLen) && (szServiceName[dwIdx] > 0))
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dwIdx++;
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if (dwIdx == dwMinTrustedFileNameLen) {
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// test first 4 bytes to see if they match
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if (!wcsncmp(szServiceName, NAME_PREFIX, sizeof(LONGLONG))) {
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// then see if the rest is in this list
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dwNameToTest = * ((DWORD *)(szServiceName+4));
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for (dwIdx = 0; dwIdx < dwTrustedFileNameCount; dwIdx++) {
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if (dwNameToTest == dwTrustedFileNames[dwIdx]) {
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// match found
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bReturn = TRUE;
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break;
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} else {
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// no match so continue
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}
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}
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} else {
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// no match so return false
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}
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} else {
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// the name to be checked is too short so it mustn't be
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// a trusted one.
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}
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} else {
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// no string so return false
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}
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return bReturn;
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}
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DWORD
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CloseExtObjectLibrary (
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PEXT_OBJECT pObj,
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BOOL bCloseNow
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)
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/*++
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CloseExtObjectLibrary
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Closes and unloads the specified performance counter library and
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deletes all references to the functions.
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The unloader is "lazy" in that it waits for the library to be
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inactive for a specified time before unloading. This is due to the
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fact that Perflib can not ever be certain that no thread will need
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this library from one call to the next. In order to prevent "thrashing"
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due to constantly loading and unloading of the library, the unloading
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is delayed to make sure it's not really needed.
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This function expects locked and exclusive access to the object while
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it is opening. This must be provided by the calling function.
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Arguments:
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pObj -- pointer to the object information structure of the
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perf object to close
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bCloseNow -- the flag to indicate the library should be closed
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immediately. This is the result of the calling function
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closing the registry key.
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--*/
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{
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DWORD Status = ERROR_SUCCESS;
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LONGLONG TimeoutTime;
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if (((dwThreadAndLibraryTimeout == 0) ||
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(dwThreadAndLibraryTimeout == INFINITE)) && !bCloseNow) {
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return Status;
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}
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if (pObj->hLibrary != NULL) {
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// get current time to test timeout
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TimeoutTime = GetTimeAsLongLong();
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// timeout time is in ms
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TimeoutTime -= dwThreadAndLibraryTimeout;
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// don't close the library unless the object hasn't been accessed for
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// a while or the caller is closing the key
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if ((TimeoutTime > pObj->llLastUsedTime) || bCloseNow) {
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// don't toss if this library has the "keep" flag set and this
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// isn't a "close now" case
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if (!bCloseNow && (pObj->dwFlags & PERF_EO_KEEP_RESIDENT)) {
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// keep it loaded until the key is closed.
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} else {
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// then this is the last one to close the library
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// free library
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try {
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// call close function for this DLL
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Status = (*pObj->CloseProc)();
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} except (EXCEPTION_EXECUTE_HANDLER) {
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Status = GetExceptionCode();
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_CLOSE_EXTOBJLIB,
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ARG_TYPE_STR, Status,
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// pObj->szCloseProcName,
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// STRSIZE(pObj->szCloseProcName), NULL));
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TRACE_STR(pObj->szCloseProcName), NULL));
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}
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FreeLibrary (pObj->hLibrary);
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pObj->hLibrary = NULL;
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// clear all pointers that are now invalid
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pObj->OpenProc = NULL;
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pObj->CollectProc = NULL;
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pObj->QueryProc = NULL;
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pObj->CloseProc = NULL;
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InterlockedIncrement((LONG *)&pObj->dwCloseCount);
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pObj->llLastUsedTime = 0;
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}
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}
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Status = ERROR_SUCCESS;
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} else {
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// already closed
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Status = ERROR_SUCCESS;
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}
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return Status;
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}
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DWORD
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OpenExtObjectLibrary (
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PEXT_OBJECT pObj
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)
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/*++
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OpenExtObjectLibrary
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Opens the specified library and looks up the functions used by
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the performance library. If the library is successfully
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loaded and opened then the open procedure is called to initialize
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the object.
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This function expects locked and exclusive access to the object while
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it is opening. This must be provided by the calling function.
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Arguments:
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pObj -- pointer to the object information structure of the
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perf object to close
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--*/
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{
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DWORD FnStatus = ERROR_SUCCESS;
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DWORD Status = ERROR_SUCCESS;
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DWORD dwOpenEvent = 0;
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DWORD dwType;
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DWORD dwSize;
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DWORD dwValue;
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// variables used for event logging
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DWORD dwDataIndex;
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WORD wStringIndex;
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ULONG_PTR dwRawDataDwords[8];
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LPWSTR szMessageArray[8];
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HANDLE hPerflibFuncTimer = NULL;
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DLL_VALIDATION_DATA CurrentDllData;
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OPEN_PROC_WAIT_INFO opwInfo;
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UINT nErrorMode;
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LPWSTR szServiceName;
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DWORD szServiceNameSize;
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BOOL bUseTimer;
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// check to see if the library has already been opened
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if (pObj->dwFlags & PERF_EO_DISABLED) return ERROR_SERVICE_DISABLED;
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if (pObj->hLibrary == NULL) {
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// library isn't loaded yet, so
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// check to see if this function is enabled
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dwType = 0;
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dwSize = sizeof (dwValue);
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dwValue = 0;
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Status = PrivateRegQueryValueExW (
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pObj->hPerfKey,
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DisablePerformanceCounters,
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NULL,
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&dwType,
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(LPBYTE)&dwValue,
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&dwSize);
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if ((Status == ERROR_SUCCESS) &&
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(dwType == REG_DWORD) &&
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(dwValue == 1)) {
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// then DON'T Load this library
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pObj->dwFlags |= PERF_EO_DISABLED;
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} else {
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// set the error status & the flag value
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Status = ERROR_SUCCESS;
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pObj->dwFlags &= ~PERF_EO_DISABLED;
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}
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szServiceName = pObj->szServiceName;
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if (szServiceName == NULL) {
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szServiceName = (LPWSTR) &NULL_STRING[0];
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}
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szServiceNameSize = WSTRSIZE(szServiceName);
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if ((Status == ERROR_SUCCESS) &&
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(pObj->LibData.FileSize > 0)) {
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if (ServiceIsTrustedByDefault(pObj->szServiceName)) {
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// then set as trusted and continue
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pObj->dwFlags |= PERF_EO_TRUSTED;
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} else {
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// see if this is a trusted file or a file that has been updated
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// get the file information
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memset (&CurrentDllData, 0, sizeof(CurrentDllData));
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Status = GetPerfDllFileInfo (
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pObj->szLibraryName,
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&CurrentDllData);
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if (Status == ERROR_SUCCESS) {
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// compare file data to registry data and update flags
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if ((*(LONGLONG *)&pObj->LibData.CreationDate) ==
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(*(LONGLONG *)&CurrentDllData.CreationDate) &&
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(pObj->LibData.FileSize == CurrentDllData.FileSize)) {
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pObj->dwFlags |= PERF_EO_TRUSTED;
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} else if (lEventLogLevel >= LOG_USER) {
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TRACE((WINPERF_DBG_TRACE_WARNING),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_TYPE_WSTR, 0, szServiceName,
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szServiceNameSize, NULL));
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// load data for eventlog message
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dwDataIndex = wStringIndex = 0;
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szMessageArray[wStringIndex++] =
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pObj->szLibraryName;
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szMessageArray[wStringIndex++] =
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pObj->szServiceName;
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ReportEvent (hEventLog,
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EVENTLOG_WARNING_TYPE, // error type
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0, // category (not used)
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(DWORD)PERFLIB_NOT_TRUSTED_FILE, // event,
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NULL, // SID (not used),
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wStringIndex, // number of strings
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0, // sizeof raw data
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szMessageArray, // message text array
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NULL); // raw data
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}
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}
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}
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}
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if ((Status == ERROR_SUCCESS) && (!(pObj->dwFlags & PERF_EO_DISABLED))) {
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// go ahead and load it
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nErrorMode = SetErrorMode (SEM_FAILCRITICALERRORS);
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// then load library & look up functions
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pObj->hLibrary = LoadLibraryExW (pObj->szLibraryName,
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NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
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if (pObj->hLibrary != NULL) {
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// lookup function names
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pObj->OpenProc = (OPENPROC)GetProcAddress(
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pObj->hLibrary, pObj->szOpenProcName);
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if (pObj->OpenProc == NULL) {
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_DEF(ARG_TYPE_WSTR, 1) | ARG_DEF(ARG_TYPE_STR, 2),
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0, szServiceName, szServiceNameSize,
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TRACE_STR(pObj->szOpenProcName), NULL));
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if (lEventLogLevel >= LOG_USER) {
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WCHAR wszProcName[MAX_PATH+1];
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Status = GetLastError();
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// load data for eventlog message
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dwDataIndex = wStringIndex = 0;
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dwRawDataDwords[dwDataIndex++] =
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(ULONG_PTR)Status;
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wcstombs(pObj->szOpenProcName, wszProcName, MAX_PATH);
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szMessageArray[wStringIndex++] = &wszProcName[0];
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szMessageArray[wStringIndex++] =
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pObj->szLibraryName;
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szMessageArray[wStringIndex++] =
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pObj->szServiceName;
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ReportEvent (hEventLog,
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EVENTLOG_ERROR_TYPE, // error type
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0, // category (not used)
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(DWORD)PERFLIB_OPEN_PROC_NOT_FOUND, // event,
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NULL, // SID (not used),
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wStringIndex, // number of strings
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dwDataIndex*sizeof(ULONG_PTR), // sizeof raw data
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szMessageArray, // message text array
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(LPVOID)&dwRawDataDwords[0]); // raw data
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}
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DisablePerfLibrary (pObj);
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}
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if (Status == ERROR_SUCCESS) {
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if (pObj->dwFlags & PERF_EO_QUERY_FUNC) {
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pObj->QueryProc = (QUERYPROC)GetProcAddress (
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pObj->hLibrary, pObj->szCollectProcName);
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pObj->CollectProc = (COLLECTPROC)pObj->QueryProc;
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} else {
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pObj->CollectProc = (COLLECTPROC)GetProcAddress (
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pObj->hLibrary, pObj->szCollectProcName);
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pObj->QueryProc = (QUERYPROC)pObj->CollectProc;
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}
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if (pObj->CollectProc == NULL) {
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_DEF(ARG_TYPE_WSTR, 1) | ARG_DEF(ARG_TYPE_STR, 2),
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0, szServiceName, szServiceNameSize,
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TRACE_STR(pObj->szCollectProcName), NULL));
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if (lEventLogLevel >= LOG_USER) {
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WCHAR wszProcName[MAX_PATH+1];
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Status = GetLastError();
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// load data for eventlog message
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dwDataIndex = wStringIndex = 0;
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dwRawDataDwords[dwDataIndex++] =
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(ULONG_PTR)Status;
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wcstombs(pObj->szCollectProcName,
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wszProcName, MAX_PATH);
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szMessageArray[wStringIndex++] = &wszProcName[0];
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szMessageArray[wStringIndex++] =
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pObj->szLibraryName;
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szMessageArray[wStringIndex++] =
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pObj->szServiceName;
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ReportEvent (hEventLog,
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EVENTLOG_ERROR_TYPE, // error type
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0, // category (not used)
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(DWORD)PERFLIB_COLLECT_PROC_NOT_FOUND, // event,
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NULL, // SID (not used),
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wStringIndex, // number of strings
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dwDataIndex*sizeof(ULONG_PTR), // sizeof raw data
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szMessageArray, // message text array
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(LPVOID)&dwRawDataDwords[0]); // raw data
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}
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DisablePerfLibrary (pObj);
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}
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}
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if (Status == ERROR_SUCCESS) {
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pObj->CloseProc = (CLOSEPROC)GetProcAddress (
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pObj->hLibrary, pObj->szCloseProcName);
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if (pObj->CloseProc == NULL) {
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_DEF(ARG_TYPE_WSTR, 1) | ARG_DEF(ARG_TYPE_STR, 2),
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0, szServiceName, szServiceNameSize,
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TRACE_STR(pObj->szCloseProcName), NULL));
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if (lEventLogLevel >= LOG_USER) {
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WCHAR wszProcName[MAX_PATH+1];
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Status = GetLastError();
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// load data for eventlog message
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dwDataIndex = wStringIndex = 0;
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dwRawDataDwords[dwDataIndex++] =
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(ULONG_PTR)Status;
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wcstombs(pObj->szCollectProcName,
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wszProcName, MAX_PATH);
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szMessageArray[wStringIndex++] = &wszProcName[0];
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szMessageArray[wStringIndex++] =
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pObj->szLibraryName;
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szMessageArray[wStringIndex++] =
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pObj->szServiceName;
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ReportEvent (hEventLog,
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EVENTLOG_ERROR_TYPE, // error type
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0, // category (not used)
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(DWORD)PERFLIB_CLOSE_PROC_NOT_FOUND, // event,
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NULL, // SID (not used),
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wStringIndex, // number of strings
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dwDataIndex*sizeof(ULONG_PTR), // sizeof raw data
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szMessageArray, // message text array
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(LPVOID)&dwRawDataDwords[0]); // raw data
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}
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DisablePerfLibrary (pObj);
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}
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}
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bUseTimer = TRUE; // default
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if (!(lPerflibConfigFlags & PLCF_NO_DLL_TESTING)) {
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if (pObj->dwFlags & PERF_EO_TRUSTED) {
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bUseTimer = FALSE; // Trusted DLL's are not timed
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}
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} else {
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// disable DLL testing
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bUseTimer = FALSE; // Timing is disabled as well
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}
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if (Status == ERROR_SUCCESS) {
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try {
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// start timer
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opwInfo.pNext = NULL;
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opwInfo.szLibraryName = pObj->szLibraryName;
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opwInfo.szServiceName = pObj->szServiceName;
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opwInfo.dwWaitTime = pObj->dwOpenTimeout;
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opwInfo.dwEventMsg = PERFLIB_OPEN_PROC_TIMEOUT;
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opwInfo.pData = (LPVOID)pObj;
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if (bUseTimer) {
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hPerflibFuncTimer = StartPerflibFunctionTimer(&opwInfo);
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// if no timer, continue anyway, even though things may
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// hang, it's better than not loading the DLL since they
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// usually load OK
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//
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if (hPerflibFuncTimer == NULL) {
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// unable to get a timer entry
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TRACE((WINPERF_DBG_TRACE_WARNING),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB, 0, 0, NULL));
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}
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} else {
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hPerflibFuncTimer = NULL;
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}
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// call open procedure to initialize DLL
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FnStatus = (*pObj->OpenProc)(pObj->szLinkageString);
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// check the result.
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if (FnStatus != ERROR_SUCCESS) {
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_DEF(ARG_TYPE_WSTR, 1) | ARG_DEF(ARG_TYPE_WSTR, 2),
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FnStatus, szServiceName, szServiceNameSize,
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pObj->szLinkageString, (pObj->szLinkageString) ?
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WSTRSIZE(pObj->szLinkageString) : 0, NULL));
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dwOpenEvent = PERFLIB_OPEN_PROC_FAILURE;
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} else {
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InterlockedIncrement((LONG *)&pObj->dwOpenCount);
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}
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} except (EXCEPTION_EXECUTE_HANDLER) {
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FnStatus = GetExceptionCode();
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TRACE((WINPERF_DBG_TRACE_FATAL),
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(&PerflibGuid, __LINE__, PERF_OPEN_EXTOBJLIB,
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ARG_DEF(ARG_TYPE_WSTR, 1), FnStatus,
|
|
szServiceName, szServiceNameSize, NULL));
|
|
dwOpenEvent = PERFLIB_OPEN_PROC_EXCEPTION;
|
|
}
|
|
|
|
if (hPerflibFuncTimer != NULL) {
|
|
// kill timer
|
|
Status = KillPerflibFunctionTimer (hPerflibFuncTimer);
|
|
hPerflibFuncTimer = NULL;
|
|
}
|
|
|
|
if (FnStatus != ERROR_SUCCESS) {
|
|
DWORD ReportError = 1;
|
|
if (dwOpenEvent == PERFLIB_OPEN_PROC_EXCEPTION) {
|
|
DisablePerfLibrary (pObj);
|
|
}
|
|
else {
|
|
ReportError = PerfUpdateErrorCount(pObj, 1);
|
|
}
|
|
if ((ReportError > 0) && (lEventLogLevel >= LOG_USER)) {
|
|
// load data for eventlog message
|
|
dwDataIndex = wStringIndex = 0;
|
|
dwRawDataDwords[dwDataIndex++] =
|
|
(ULONG_PTR)FnStatus;
|
|
szMessageArray[wStringIndex++] =
|
|
pObj->szServiceName;
|
|
szMessageArray[wStringIndex++] =
|
|
pObj->szLibraryName;
|
|
|
|
ReportEventW (hEventLog,
|
|
(WORD)EVENTLOG_ERROR_TYPE, // error type
|
|
0, // category (not used)
|
|
dwOpenEvent, // event,
|
|
NULL, // SID (not used),
|
|
wStringIndex, // number of strings
|
|
dwDataIndex*sizeof(ULONG_PTR), // sizeof raw data
|
|
szMessageArray, // message text array
|
|
(LPVOID)&dwRawDataDwords[0]); // raw data
|
|
}
|
|
}
|
|
else {
|
|
PerfUpdateErrorCount(pObj, 0);
|
|
}
|
|
}
|
|
|
|
if (FnStatus != ERROR_SUCCESS) {
|
|
// clear fields
|
|
pObj->OpenProc = NULL;
|
|
pObj->CollectProc = NULL;
|
|
pObj->QueryProc = NULL;
|
|
pObj->CloseProc = NULL;
|
|
if (pObj->hLibrary != NULL) {
|
|
FreeLibrary (pObj->hLibrary);
|
|
pObj->hLibrary = NULL;
|
|
}
|
|
Status = FnStatus;
|
|
} else {
|
|
pObj->llLastUsedTime = GetTimeAsLongLong();
|
|
}
|
|
} else {
|
|
Status = GetLastError();
|
|
}
|
|
SetErrorMode (nErrorMode);
|
|
}
|
|
} else {
|
|
// else already open so bump the ref count
|
|
pObj->llLastUsedTime = GetTimeAsLongLong();
|
|
}
|
|
|
|
return Status;
|
|
}
|