+++ /dev/null
-/* $Id$
-*/
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * LICENSE: See LGPL.txt in the top level directory
- * PROJECT: ReactOS system libraries
- * FILE: reactos/lib/psapi/enum/module.c
- * PURPOSE: Enumerate system and process modules
- * PROGRAMMER: KJK::Hyperion <noog@libero.it>
- * UPDATE HISTORY:
- * 10/06/2002: Created
- * 29/08/2002: Generalized the interface to improve reusability,
- * more efficient use of memory operations
- */
-
-#include <ddk/ntddk.h>
-#include <debug.h>
-#include <internal/psapi.h>
-#include <ntdll/ldr.h>
-
-NTSTATUS
-STDCALL
-PsaEnumerateSystemModules
-(
- IN PSYSMOD_ENUM_ROUTINE Callback,
- IN OUT PVOID CallbackContext
-)
-{
- ULONG nSize;
- register NTSTATUS nErrCode = STATUS_SUCCESS;
- register PULONG pnModuleCount = &nSize;
- register PSYSTEM_MODULE_ENTRY psmeCurModule;
- register ULONG nModuleCount;
-
- /* initial probe */
- nErrCode = NtQuerySystemInformation
- (
- SystemModuleInformation,
- pnModuleCount,
- sizeof(nSize),
- NULL
- );
-
- if(nErrCode != STATUS_INFO_LENGTH_MISMATCH && !NT_SUCCESS(nErrCode))
- {
- /* failure */
- DPRINT(FAILED_WITH_STATUS, "NtQuerySystemInformation", nErrCode);
- return nErrCode;
- }
-
- /* RATIONALE: the loading of a system module is a rare occurrence. To minimize
- memory operations that could be expensive, or fragment the pool/heap, we try
- to determine the buffer size in advance, knowing that the number of elements
- is unlikely to change */
- nSize = sizeof(ULONG) + nSize * sizeof(SYSTEM_MODULE_ENTRY);
- pnModuleCount = NULL;
-
- do
- {
- register void * pTmp;
-
- /* free the buffer, and reallocate it to the new size. RATIONALE: since we
- ignore the buffer's content at this point, there's no point in a realloc(),
- that could end up copying a large chunk of data we'd discard anyway */
- free(pnModuleCount);
- pTmp = malloc(nSize);
-
- if(pTmp == NULL)
- {
- /* failure */
- nErrCode = STATUS_NO_MEMORY;
- goto esm_Finalize;
- }
-
- pnModuleCount = pTmp;
-
- /* query the information */
- nErrCode = NtQuerySystemInformation
- (
- SystemModuleInformation,
- pnModuleCount,
- nSize,
- NULL
- );
-
- /* double the buffer for the next loop */
- nSize += nSize;
- }
- /* repeat until the buffer is big enough */
- while(nErrCode == STATUS_INFO_LENGTH_MISMATCH);
-
- if(!NT_SUCCESS(nErrCode))
- {
- /* failure */
- DPRINT(FAILED_WITH_STATUS, "NtQuerySystemInformation", nErrCode);
- goto esm_Finalize;
- }
-
- /* the array of modules starts right after an ULONG storing their count */
- psmeCurModule = (PSYSTEM_MODULE_ENTRY)(pnModuleCount + 1);
-
- nModuleCount = *pnModuleCount;
-
- /* repeat until all modules have been returned */
- while(nModuleCount > 0)
- {
- /* return current module to the callback */
- nErrCode = Callback(nModuleCount, psmeCurModule, CallbackContext);
-
- if(!NT_SUCCESS(nErrCode))
- /* failure */
- goto esm_Finalize;
-
- /* next module */
- psmeCurModule ++;
- nModuleCount --;
- }
-
-esm_Finalize:
- /* free the buffer */
- free(pnModuleCount);
-
- return (nErrCode);
-}
-
-NTSTATUS
-STDCALL
-PsaEnumerateProcessModules
-(
- IN HANDLE ProcessHandle,
- IN PPROCMOD_ENUM_ROUTINE Callback,
- IN OUT PVOID CallbackContext
-)
-{
- register NTSTATUS nErrCode;
-
- /* current process - use direct memory copy */
- if(ProcessHandle == NtCurrentProcess())
- {
- register PLIST_ENTRY pleListHead;
- register PLIST_ENTRY pleCurEntry;
-
-#if 0
- /* FIXME: activate this when GCC supports SEH */
- __try
- {
-#endif
- pleListHead = &(NtCurrentPeb()->Ldr->InLoadOrderModuleList);
- pleCurEntry = pleListHead->Flink;
-
- while(pleCurEntry != pleListHead)
- {
- register PLDR_MODULE plmModule = CONTAINING_RECORD
- (
- pleCurEntry,
- LDR_MODULE,
- InLoadOrderModuleList
- );
-
- /* return the current module to the callback */
- nErrCode = Callback(ProcessHandle, plmModule, CallbackContext);
-
- if(!NT_SUCCESS(nErrCode))
- /* failure */
- goto epm_Failure;
-
- pleCurEntry = plmModule->InLoadOrderModuleList.Flink;
- }
-#if 0
- /* FIXME: activate this when GCC supports SEH */
- }
- __except(EXCEPTION_EXECUTE_HANDLER)
- {
- return GetExceptionCode();
- }
-#endif
- }
- /* another process */
- else
- {
- PROCESS_BASIC_INFORMATION pbiInfo;
- PPEB_LDR_DATA ppldLdrData;
- LDR_MODULE lmModule;
- PLIST_ENTRY pleListHead;
- PLIST_ENTRY pleCurEntry;
-
- /* query the process basic information (includes the PEB address) */
- nErrCode = NtQueryInformationProcess
- (
- ProcessHandle,
- ProcessBasicInformation,
- &pbiInfo,
- sizeof(pbiInfo),
- NULL
- );
-
- if(!NT_SUCCESS(nErrCode))
- {
- /* failure */
- DPRINT(FAILED_WITH_STATUS, "NtQueryInformationProcess", nErrCode);
- goto epm_Failure;
- }
-
- /* get the address of the PE Loader data */
- nErrCode = NtReadVirtualMemory
- (
- ProcessHandle,
- &(pbiInfo.PebBaseAddress->Ldr),
- &ppldLdrData,
- sizeof(ppldLdrData),
- NULL
- );
-
- if(!NT_SUCCESS(nErrCode))
- {
- /* failure */
- DPRINT(FAILED_WITH_STATUS, "NtReadVirtualMemory", nErrCode);
- goto epm_Failure;
- }
-
- /* head of the module list: the last element in the list will point to this */
- pleListHead = &ppldLdrData->InLoadOrderModuleList;
-
- /* get the address of the first element in the list */
- nErrCode = NtReadVirtualMemory
- (
- ProcessHandle,
- &(ppldLdrData->InLoadOrderModuleList.Flink),
- &pleCurEntry,
- sizeof(pleCurEntry),
- NULL
- );
-
- while(pleCurEntry != pleListHead)
- {
- /* read the current module */
- nErrCode = NtReadVirtualMemory
- (
- ProcessHandle,
- CONTAINING_RECORD(pleCurEntry, LDR_MODULE, InLoadOrderModuleList),
- &lmModule,
- sizeof(lmModule),
- NULL
- );
-
- if(!NT_SUCCESS(nErrCode))
- {
- /* failure */
- DPRINT(FAILED_WITH_STATUS, "NtReadVirtualMemory", nErrCode);
- goto epm_Failure;
- }
-
- /* return the current module to the callback */
- nErrCode = Callback(ProcessHandle, &lmModule, CallbackContext);
-
- if(!NT_SUCCESS(nErrCode))
- /* failure */
- goto epm_Failure;
-
- /* address of the next module in the list */
- pleCurEntry = lmModule.InLoadOrderModuleList.Flink;
- }
-
- }
-
- /* success */
- return (STATUS_SUCCESS);
-
-epm_Failure:
- /* failure */
- return (nErrCode);
-}
-
-/* EOF */
git://git.jankratochvil.net / reactos.git / blobdiff