434 lines
11 KiB
C++
434 lines
11 KiB
C++
/*++
|
|
|
|
Copyright (c) 1993-2001 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
process.cpp
|
|
|
|
Abstract:
|
|
|
|
This code provides access to the task list.
|
|
|
|
Author:
|
|
|
|
Wesley Witt (wesw) 16-June-1993
|
|
|
|
Environment:
|
|
|
|
User Mode
|
|
|
|
--*/
|
|
|
|
#include "pch.cpp"
|
|
|
|
#include <winperf.h>
|
|
|
|
|
|
//
|
|
// task list structure returned from GetTaskList()
|
|
//
|
|
typedef struct _TASK_LIST {
|
|
DWORD dwProcessId;
|
|
_TCHAR ProcessName[MAX_PATH];
|
|
} TASK_LIST, *PTASK_LIST;
|
|
|
|
|
|
//
|
|
// defines
|
|
//
|
|
#define INITIAL_SIZE 51200
|
|
#define EXTEND_SIZE 25600
|
|
#define REGKEY_PERF _T("software\\microsoft\\windows nt\\currentversion\\perflib")
|
|
#define REGSUBKEY_COUNTERS _T("Counters")
|
|
#define PROCESS_COUNTER _T("process")
|
|
#define PROCESSID_COUNTER _T("id process")
|
|
#define UNKNOWN_TASK _T("unknown")
|
|
|
|
|
|
//
|
|
// prototypes
|
|
//
|
|
PTASK_LIST
|
|
GetTaskList(
|
|
LPLONG pNumTasks
|
|
);
|
|
|
|
|
|
void
|
|
GetTaskName(
|
|
ULONG pid,
|
|
_TCHAR *szTaskName,
|
|
LPDWORD pdwSize
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Gets the task name for a given process id.
|
|
|
|
Arguments:
|
|
|
|
pid - Process id to look for.
|
|
|
|
szTaskName - Buffer to put the task name into.
|
|
|
|
lpdwSize - Pointer to a dword. On entry it contains the
|
|
size of the szTaskName buffer in characters.
|
|
On exit it contains the number of characters
|
|
in the buffer.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
PTASK_LIST pTask;
|
|
PTASK_LIST pTaskBegin;
|
|
LONG NumTasks;
|
|
|
|
|
|
pTask = pTaskBegin = GetTaskList( &NumTasks );
|
|
|
|
if (pTask == NULL) {
|
|
if (szTaskName) {
|
|
_tcsncpy( szTaskName, _T("unknown"), *pdwSize );
|
|
szTaskName[(*pdwSize) -1] = 0;
|
|
}
|
|
*pdwSize = min( 7, *pdwSize );
|
|
|
|
} else {
|
|
|
|
while (NumTasks--) {
|
|
if (pTask->dwProcessId == pid) {
|
|
if (szTaskName) {
|
|
_tcsncpy( szTaskName, pTask->ProcessName, *pdwSize );
|
|
szTaskName[(*pdwSize) -1] = 0;
|
|
}
|
|
*pdwSize = min( _tcslen(pTask->ProcessName), *pdwSize );
|
|
break;
|
|
}
|
|
pTask++;
|
|
}
|
|
|
|
if (NumTasks < 0) {
|
|
if (szTaskName) {
|
|
_tcsncpy( szTaskName, LoadRcString(IDS_APP_ALREADY_EXITED), *pdwSize );
|
|
szTaskName[(*pdwSize) -1] = 0;
|
|
}
|
|
*pdwSize = min( 8, *pdwSize );
|
|
}
|
|
|
|
free( pTaskBegin );
|
|
}
|
|
}
|
|
|
|
PTASK_LIST
|
|
GetTaskList(
|
|
LPLONG pNumTasks
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Provides an API for getting a list of tasks running at the time of the
|
|
API call. This function uses the registry performance data to get the
|
|
task list and is therefor straight WIN32 calls that anyone can call.
|
|
|
|
Arguments:
|
|
|
|
pNumTasks - pointer to a dword that will be set to the
|
|
number of tasks returned.
|
|
|
|
Return Value:
|
|
|
|
PTASK_LIST - pointer to an array of TASK_LIST records.
|
|
|
|
--*/
|
|
|
|
{
|
|
DWORD rc;
|
|
HKEY hKeyNames;
|
|
DWORD dwType;
|
|
DWORD dwSize;
|
|
DWORD dwSizeOffered;
|
|
PTSTR buf = NULL;
|
|
_TCHAR szSubKey[1024];
|
|
LANGID lid;
|
|
PTSTR p;
|
|
PTSTR p2;
|
|
PPERF_DATA_BLOCK pPerf;
|
|
PPERF_OBJECT_TYPE pObj;
|
|
PPERF_INSTANCE_DEFINITION pInst;
|
|
PPERF_COUNTER_BLOCK pCounter;
|
|
PPERF_COUNTER_DEFINITION pCounterDef;
|
|
DWORD i;
|
|
DWORD dwProcessIdTitle;
|
|
DWORD dwProcessIdCounter;
|
|
PTASK_LIST pTask;
|
|
PTASK_LIST pTaskReturn = NULL;
|
|
#ifndef UNICODE
|
|
_TCHAR szProcessName[MAX_PATH];
|
|
#endif
|
|
|
|
//
|
|
// set the number of tasks to zero until we get some
|
|
//
|
|
*pNumTasks = 0;
|
|
|
|
//
|
|
// Look for the list of counters. Always use the neutral
|
|
// English version, regardless of the local language. We
|
|
// are looking for some particular keys, and we are always
|
|
// going to do our looking in English. We are not going
|
|
// to show the user the counter names, so there is no need
|
|
// to go find the corresponding name in the local language.
|
|
//
|
|
lid = MAKELANGID( LANG_ENGLISH, SUBLANG_NEUTRAL );
|
|
_stprintf( szSubKey, _T("%s\\%03x"), REGKEY_PERF, lid );
|
|
rc = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
|
|
szSubKey,
|
|
0,
|
|
KEY_READ,
|
|
&hKeyNames
|
|
);
|
|
if (rc != ERROR_SUCCESS) {
|
|
goto exit;
|
|
}
|
|
|
|
//
|
|
// get the buffer size for the counter names
|
|
//
|
|
rc = RegQueryValueEx( hKeyNames,
|
|
REGSUBKEY_COUNTERS,
|
|
NULL,
|
|
&dwType,
|
|
NULL,
|
|
&dwSize
|
|
);
|
|
|
|
if (rc != ERROR_SUCCESS) {
|
|
goto exit;
|
|
}
|
|
|
|
//
|
|
// allocate the counter names buffer
|
|
//
|
|
buf = (PTSTR) calloc( dwSize, sizeof(BYTE) );
|
|
if (buf == NULL) {
|
|
goto exit;
|
|
}
|
|
|
|
//
|
|
// read the counter names from the registry
|
|
//
|
|
rc = RegQueryValueEx( hKeyNames,
|
|
REGSUBKEY_COUNTERS,
|
|
NULL,
|
|
&dwType,
|
|
(PBYTE) buf,
|
|
&dwSize
|
|
);
|
|
|
|
if (rc != ERROR_SUCCESS) {
|
|
goto exit;
|
|
}
|
|
|
|
//
|
|
// now loop thru the counter names looking for the following counters:
|
|
//
|
|
// 1. "Process" process name
|
|
// 2. "ID Process" process id
|
|
//
|
|
// the buffer contains multiple null terminated strings and then
|
|
// finally null terminated at the end. the strings are in pairs of
|
|
// counter number and counter name.
|
|
//
|
|
|
|
p = buf;
|
|
while (*p) {
|
|
if (_tcsicmp(p, PROCESS_COUNTER) == 0) {
|
|
//
|
|
// look backwards for the counter number
|
|
//
|
|
for ( p2=p-2; isdigit(*p2); p2--) {
|
|
;
|
|
}
|
|
_tcscpy( szSubKey, p2+1 );
|
|
}
|
|
else
|
|
if (_tcsicmp(p, PROCESSID_COUNTER) == 0) {
|
|
//
|
|
// look backwards for the counter number
|
|
//
|
|
for( p2=p-2; isdigit(*p2); p2--) {
|
|
;
|
|
}
|
|
dwProcessIdTitle = _ttol( p2+1 );
|
|
}
|
|
//
|
|
// next string
|
|
//
|
|
p += (_tcslen(p) + 1);
|
|
}
|
|
|
|
//
|
|
// free the counter names buffer
|
|
//
|
|
free( buf );
|
|
|
|
|
|
//
|
|
// allocate the initial buffer for the performance data
|
|
//
|
|
dwSize = INITIAL_SIZE;
|
|
buf = (PTSTR) calloc( dwSize, sizeof(BYTE) );
|
|
if (buf == NULL) {
|
|
goto exit;
|
|
}
|
|
|
|
|
|
while (TRUE) {
|
|
|
|
dwSizeOffered = dwSize;
|
|
|
|
rc = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
|
|
szSubKey,
|
|
NULL,
|
|
&dwType,
|
|
(PBYTE) buf,
|
|
&dwSizeOffered
|
|
);
|
|
|
|
pPerf = (PPERF_DATA_BLOCK) buf;
|
|
|
|
//
|
|
// check for success and valid perf data block signature
|
|
//
|
|
if ((rc == ERROR_SUCCESS) &&
|
|
(dwSize > 0) &&
|
|
(pPerf)->Signature[0] == (WCHAR)_T('P') &&
|
|
(pPerf)->Signature[1] == (WCHAR)_T('E') &&
|
|
(pPerf)->Signature[2] == (WCHAR)_T('R') &&
|
|
(pPerf)->Signature[3] == (WCHAR)_T('F') ) {
|
|
break;
|
|
}
|
|
|
|
//
|
|
// if buffer is not big enough, reallocate and try again
|
|
//
|
|
if (rc == ERROR_MORE_DATA) {
|
|
dwSize += EXTEND_SIZE;
|
|
buf = (PTSTR) realloc( buf, dwSize );
|
|
memset( buf, 0, dwSize );
|
|
}
|
|
else {
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
//
|
|
// set the perf_object_type pointer
|
|
//
|
|
pObj = (PPERF_OBJECT_TYPE) ((DWORD_PTR)pPerf + pPerf->HeaderLength);
|
|
|
|
//
|
|
// loop thru the performance counter definition records looking
|
|
// for the process id counter and then save its offset
|
|
//
|
|
pCounterDef = (PPERF_COUNTER_DEFINITION) ((DWORD_PTR)pObj + pObj->HeaderLength);
|
|
for (i=0; i<(DWORD)pObj->NumCounters; i++) {
|
|
if (pCounterDef->CounterNameTitleIndex == dwProcessIdTitle) {
|
|
dwProcessIdCounter = pCounterDef->CounterOffset;
|
|
break;
|
|
}
|
|
pCounterDef++;
|
|
}
|
|
|
|
//
|
|
// allocate a buffer for the returned task list
|
|
//
|
|
dwSize = pObj->NumInstances * sizeof(TASK_LIST);
|
|
pTask = pTaskReturn = (PTASK_LIST) calloc( dwSize, sizeof(BYTE) );
|
|
if (pTask == NULL) {
|
|
goto exit;
|
|
}
|
|
|
|
//
|
|
// loop thru the performance instance data extracting each process name
|
|
// and process id
|
|
//
|
|
*pNumTasks = pObj->NumInstances;
|
|
pInst = (PPERF_INSTANCE_DEFINITION) ((DWORD_PTR)pObj + pObj->DefinitionLength);
|
|
for (i=0; i<(DWORD)pObj->NumInstances; i++) {
|
|
//
|
|
// pointer to the process name
|
|
//
|
|
p = (PTSTR) ((DWORD_PTR)pInst + pInst->NameOffset);
|
|
|
|
#ifdef UNICODE
|
|
if (*p) {
|
|
Assert( (_tcslen(p)+4) * sizeof(_TCHAR) < sizeof(pTask->ProcessName));
|
|
|
|
_tcscpy( pTask->ProcessName, p );
|
|
_tcscat( pTask->ProcessName, _T(".exe") );
|
|
} else {
|
|
//
|
|
// if we cant convert the string then use a bogus value
|
|
//
|
|
_tcscpy( pTask->ProcessName, UNKNOWN_TASK );
|
|
}
|
|
#else
|
|
//
|
|
// convert it to ascii
|
|
//
|
|
rc = WideCharToMultiByte( CP_ACP,
|
|
0,
|
|
(LPCWSTR)p,
|
|
-1,
|
|
szProcessName,
|
|
sizeof(szProcessName) / sizeof(_TCHAR),
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
if (!rc) {
|
|
//
|
|
// if we cant convert the string then use a bogus value
|
|
//
|
|
_tcscpy( pTask->ProcessName, UNKNOWN_TASK );
|
|
}
|
|
|
|
if ( (_tcslen(szProcessName)+4) * sizeof(_TCHAR) < sizeof(pTask->ProcessName)) {
|
|
_tcscpy( pTask->ProcessName, szProcessName );
|
|
_tcscat( pTask->ProcessName, _T(".exe") );
|
|
}
|
|
#endif
|
|
|
|
//
|
|
// get the process id
|
|
//
|
|
pCounter = (PPERF_COUNTER_BLOCK) ((DWORD_PTR)pInst + pInst->ByteLength);
|
|
pTask->dwProcessId = *((LPDWORD) ((DWORD_PTR)pCounter + dwProcessIdCounter));
|
|
|
|
//
|
|
// next process
|
|
//
|
|
pTask++;
|
|
pInst = (PPERF_INSTANCE_DEFINITION) ((DWORD_PTR)pCounter + pCounter->ByteLength);
|
|
}
|
|
|
|
exit:
|
|
if (buf) {
|
|
free( buf );
|
|
}
|
|
|
|
RegCloseKey( hKeyNames );
|
|
|
|
return pTaskReturn;
|
|
}
|