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MmpTlsFiber.cpp
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140 lines (100 loc) · 3.33 KB
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#include "stdafx.h"
#include "MmpTlsp.h"
#include "MmpTlsFiber.h"
#include <vector>
typedef struct _MMP_POSTPONED_TLS {
HANDLE hThread;
PMMP_TLSP_RECORD lpTlsRecord;
PTLS_VECTOR lpOldTlsVector;
}MMP_POSTPONED_TLS, * PMMP_POSTPONED_TLS;
std::vector<MMP_POSTPONED_TLS>* MmpPostponedTlsList;
HANDLE MmpPostponedTlsEvent;
CRITICAL_SECTION MmpPostponedTlsLock;
DWORD WINAPI MmpReleasePostponedTlsWorker(PVOID) {
DWORD code;
DWORD waitTime = INFINITE;
while (true) {
WaitForSingleObject(MmpPostponedTlsEvent, waitTime);
EnterCriticalSection(&MmpPostponedTlsLock);
if (MmpPostponedTlsList) {
auto iter = MmpPostponedTlsList->begin();
while (iter != MmpPostponedTlsList->end()) {
const auto& item = *iter;
GetExitCodeThread(item.hThread, &code);
if (code == STILL_ACTIVE) {
++iter;
}
else {
RtlAcquireSRWLockExclusive(&MmpGlobalDataPtr->MmpTls->MmpTlsListLock);
auto TlspMmpBlock = (PVOID*)item.lpOldTlsVector->ModuleTlsData;
auto entry = MmpGlobalDataPtr->MmpTls->MmpTlsList.Flink;
while (entry != &MmpGlobalDataPtr->MmpTls->MmpTlsList) {
auto p = CONTAINING_RECORD(entry, TLS_ENTRY, TlsEntryLinks);
RtlFreeHeap(RtlProcessHeap(), 0, TlspMmpBlock[p->TlsDirectory.Characteristics]);
entry = entry->Flink;
}
RtlFreeHeap(RtlProcessHeap(), 0, CONTAINING_RECORD(item.lpTlsRecord->TlspLdrBlock, TLS_VECTOR, TLS_VECTOR::ModuleTlsData));
RtlFreeHeap(RtlProcessHeap(), 0, item.lpTlsRecord);
RtlFreeHeap(RtlProcessHeap(), 0, item.lpOldTlsVector);
RtlReleaseSRWLockExclusive(&MmpGlobalDataPtr->MmpTls->MmpTlsListLock);
CloseHandle(item.hThread);
iter = MmpPostponedTlsList->erase(iter);
}
}
waitTime = MmpPostponedTlsList->empty() ? INFINITE : 1000;
}
else {
LeaveCriticalSection(&MmpPostponedTlsLock);
break;
}
LeaveCriticalSection(&MmpPostponedTlsLock);
}
return 0;
}
DWORD WINAPI MmpReleasePostponedTlsWorker_Wrap(PVOID) {
__try {
return MmpReleasePostponedTlsWorker(nullptr);
}
__except (EXCEPTION_EXECUTE_HANDLER) {
return 0;
}
}
VOID WINAPI MmpQueuePostponedTls(PMMP_TLSP_RECORD record) {
MMP_POSTPONED_TLS item;
item.hThread = OpenThread(
THREAD_QUERY_INFORMATION,
FALSE,
(DWORD)(ULONG_PTR)NtCurrentThreadId()
);
item.lpOldTlsVector = MmpAllocateTlsp();
item.lpTlsRecord = record;
RtlCopyMemory(
item.lpOldTlsVector->ModuleTlsData,
record->TlspMmpBlock,
sizeof(PVOID) * MMP_MAXIMUM_TLS_INDEX
);
EnterCriticalSection(&MmpPostponedTlsLock);
if (MmpPostponedTlsList) {
MmpPostponedTlsList->push_back(item);
SetEvent(MmpPostponedTlsEvent);
}
else {
RtlFreeHeap(RtlProcessHeap(), 0, item.lpOldTlsVector);
}
LeaveCriticalSection(&MmpPostponedTlsLock);
}
VOID OnExit() {
EnterCriticalSection(&MmpPostponedTlsLock);
MmpPostponedTlsList->~vector();
HeapFree(RtlProcessHeap(), 0, MmpPostponedTlsList);
MmpPostponedTlsList = nullptr;
CloseHandle(MmpPostponedTlsEvent);
LeaveCriticalSection(&MmpPostponedTlsLock);
}
VOID MmpTlsFiberInitialize() {
InitializeCriticalSection(&MmpPostponedTlsLock);
MmpPostponedTlsEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
MmpPostponedTlsList = new(HeapAlloc(GetProcessHeap(), 0, sizeof(std::vector<MMP_POSTPONED_TLS>))) std::vector<MMP_POSTPONED_TLS>();
atexit(OnExit);
CreateThread(nullptr, 0, MmpReleasePostponedTlsWorker_Wrap, nullptr, 0, nullptr);
}