UnrealEngine POLYGON 全逆向笔记

static bool bNamePoolInitialized;alignas(FNamePool) static uint8 NamePoolData[sizeof(FNamePool)];

_DWORD *__fastcall sub_142B04A20(_DWORD *a1, _BYTE *a2){  bool v2; // zf  _BYTE *v3; // r8  __int64 v5; // rax  int v6; // eax  RTL_SRWLOCK *v7; // rax  _DWORD *result; // rax  const char *v9; // [rsp+20h] [rbp-18h] BYREF  int v10; // [rsp+28h] [rbp-10h]  char v11; // [rsp+2Ch] [rbp-Ch]  int v12; // [rsp+40h] [rbp+8h] BYREF  int v13; // [rsp+44h] [rbp+Ch]  v2 = *a2 == 0;  v3 = a2 + 2;  v9 = a2 + 2;  v5 = -1i64;  if ( v2 )  {    do      ++v5;    while ( v3[v5] );    v11 = 0;  }  else  {    do      ++v5;    while ( *(_WORD *)&v3[2 * v5] );    v11 = 1;  }  v10 = v5;  if ( (unsigned int)v5 < 0x400 )  {    if ( byte_148089CF9 )    {      v7 = &stru_1480AD880;    }    else    {      FNamePool_FNamePool((__int64)&stru_1480AD880);      byte_148089CF9 = 1;    }    sub_142B16A60(v7, &v12, &v9);    v13 = v12;    v6 = v12;  }  else  {    v10 = 24;    v9 = "ERROR_NAME_SIZE_EXCEEDED";    v11 = 0;    v6 = sub_142B0CCB0(&v9, 1i64);  }  *a1 = v6;  result = a1;  a1[1] = 0;  return result;}

std::string GetName(uint32_t Id){    uint32_t Block = Id >> 16;    uint32_t Offset = Id & 65535;    uint8_t* GameBase = (uint8_t*)GetModuleHandleA("POLYGON-Win64-Shipping.exe");    uint8_t** GName = (uint8_t**)(GameBase + 0x80AD880);    FNameEntry* Info = (FNameEntry*)((GName)[2 + Block] + 2 * Offset);    return std::string(Info->AnsiName, Info->Len);} printf("Name:%sn", GetName(0).c_str());

Name:Non

UWorld* UEngine::GetWorldFromContextObject(const UObject* Object, EGetWorldErrorMode ErrorMode) const{    if (Object == nullptr)    {        switch (ErrorMode)        {        case EGetWorldErrorMode::Assert:            check(Object);            break;        case EGetWorldErrorMode::LogAndReturnNull:            FFrame::KismetExecutionMessage(TEXT("A null object was passed as a world context object to UEngine::GetWorldFromContextObject()."), ELogVerbosity::Warning);            //UE_LOG(LogEngine, Warning, TEXT("UEngine::GetWorldFromContextObject() passed a nullptr"));            break;        case EGetWorldErrorMode::ReturnNull:            break;        }        return nullptr;    }    bool bSupported = true;    UWorld* World = (ErrorMode == EGetWorldErrorMode::Assert) ? Object->GetWorldChecked(/*out*/ bSupported) : Object->GetWorld();    if (bSupported && (World == nullptr) && (ErrorMode == EGetWorldErrorMode::LogAndReturnNull))    {        FFrame::KismetExecutionMessage(*FString::Printf(TEXT("No world was found for object (%s) passed in to UEngine::GetWorldFromContextObject()."), *GetPathNameSafe(Object)), ELogVerbosity::Warning);    }    return (bSupported ? World : GWorld);}

.rdata:00000001470E6BE0 aANullObjectWas:                        ; DATA XREF: sub_144FEE480+1F↑o.rdata:00000001470E6BE0                 text "UTF-16LE", 'A null object was passed as a world context object '.rdata:00000001470E6C46                 text "UTF-16LE", 'to UEngine::GetWorldFromContextObject().',0

__int64 __fastcall sub_144FEE480(__int64 a1, __int64 a2, int a3){  __int64 v4; // rsi  __int64 v6; // rax  __int64 v7; // rdi  const wchar_t *v8; // rbx  const wchar_t *v9; // r8  __int64 v10; // rdx  const wchar_t *v11; // [rsp+20h] [rbp-28h] BYREF  int v12; // [rsp+28h] [rbp-20h]  const wchar_t *v13; // [rsp+30h] [rbp-18h] BYREF  int v14; // [rsp+38h] [rbp-10h]  __int64 v15; // [rsp+58h] [rbp+10h] BYREF  v4 = a2;  if ( a2 )  {    LOBYTE(v15) = 1;    if ( a3 == 2 )      v6 = sub_142C63C80(a2, &v15);    else      v6 = (*(__int64 (__fastcall **)(__int64))(*(_QWORD *)a2 + 392i64))(a2);    v7 = v6;    if ( !(_BYTE)v15 )      return qword_1482ACFD0;    if ( !v6 && a3 == 1 )    {      sub_142CD1520(v4, &v13, 0i64);      v8 = &chText;      v9 = &chText;      if ( v14 != (_DWORD)v7 )        v9 = v13;      sub_1429C9990(&v11, L"No world was found for object (%s) passed in to UEngine::GetWorldFromContextObject().", v9);      LOBYTE(v10) = 3;      if ( v12 != (_DWORD)v7 )        v8 = v11;      sub_142CAF290(v8, v10, 0i64);      if ( v11 )        sub_142A062C0();      if ( v13 )        sub_142A062C0();    }    if ( !(_BYTE)v15 )      return qword_1482ACFD0;    return v7;  }  else  {    if ( a3 == 1 )    {      v15 = 0i64;      LOBYTE(a2) = 3;      sub_142CAF290(        L"A null object was passed as a world context object to UEngine::GetWorldFromContextObject().",        a2,        0i64);    }    return 0i64;  }}

// Global UObject array instanceFUObjectArray GUObjectArray;

void UObjectBaseInit(){    SCOPED_BOOT_TIMING("UObjectBaseInit");    // Zero initialize and later on get value from .ini so it is overridable per game/ platform...    int32 MaxObjectsNotConsideredByGC = 0;    int32 SizeOfPermanentObjectPool = 0;    int32 MaxUObjects = 2 * 1024 * 1024; // Default to ~2M UObjects    bool bPreAllocateUObjectArray = false;     // To properly set MaxObjectsNotConsideredByGC look for "Log: XXX objects as part of root set at end of initial load."    // in your log file. This is being logged from LaunchEnglineLoop after objects have been added to the root set.    // Disregard for GC relies on seekfree loading for interaction with linkers. We also don't want to use it in the Editor, for which    // FPlatformProperties::RequiresCookedData() will be false. Please note that GIsEditor and FApp::IsGame() are not valid at this point.    if (FPlatformProperties::RequiresCookedData())    {        if (IsRunningCookOnTheFly())        {            GCreateGCClusters = false;        }        else        {            GConfig->GetInt(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.MaxObjectsNotConsideredByGC"), MaxObjectsNotConsideredByGC, GEngineIni);            // Not used on PC as in-place creation inside bigger pool interacts with the exit purge and deleting UObject directly.            GConfig->GetInt(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.SizeOfPermanentObjectPool"), SizeOfPermanentObjectPool, GEngineIni);        }        // Maximum number of UObjects in cooked game        GConfig->GetInt(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.MaxObjectsInGame"), MaxUObjects, GEngineIni);        // If true, the UObjectArray will pre-allocate all entries for UObject pointers        GConfig->GetBool(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.PreAllocateUObjectArray"), bPreAllocateUObjectArray, GEngineIni);    }    else    {#if IS_PROGRAM        // Maximum number of UObjects for programs can be low        MaxUObjects = 100000; // Default to 100K for programs        GConfig->GetInt(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.MaxObjectsInProgram"), MaxUObjects, GEngineIni);#else        // Maximum number of UObjects in the editor        GConfig->GetInt(TEXT("/Script/Engine.GarbageCollectionSettings"), TEXT("gc.MaxObjectsInEditor"), MaxUObjects, GEngineIni);#endif    }    if (MaxObjectsNotConsideredByGC <= 0 && SizeOfPermanentObjectPool > 0)    {        // If permanent object pool is enabled but disregard for GC is disabled, GC will mark permanent object pool objects        // as unreachable and may destroy them so disable permanent object pool too.        // An alternative would be to make GC not mark permanent object pool objects as unreachable but then they would have to        // be considered as root set objects because they could be referencing objects from outside of permanent object pool.        // This would be inconsistent and confusing and also counter productive (the more root set objects the more expensive MarkAsUnreachable phase is).        SizeOfPermanentObjectPool = 0;        UE_LOG(LogInit, Warning, TEXT("Disabling permanent object pool because disregard for GC is disabled (gc.MaxObjectsNotConsideredByGC=%d)."), MaxObjectsNotConsideredByGC);    }    // Log what we're doing to track down what really happens as log in LaunchEngineLoop doesn't report those settings in pristine form.    UE_LOG(LogInit, Log, TEXT("%s for max %d objects, including %i objects not considered by GC, pre-allocating %i bytes for permanent pool."),        bPreAllocateUObjectArray ? TEXT("Pre-allocating") : TEXT("Presizing"),        MaxUObjects, MaxObjectsNotConsideredByGC, SizeOfPermanentObjectPool);    GUObjectAllocator.AllocatePermanentObjectPool(SizeOfPermanentObjectPool);    GUObjectArray.AllocateObjectPool(MaxUObjects, MaxObjectsNotConsideredByGC, bPreAllocateUObjectArray);#if UE_WITH_OBJECT_HANDLE_LATE_RESOLVE    UE::CoreUObject::Private::InitObjectHandles(GUObjectArray.GetObjectArrayCapacity());#endif    void InitGarbageElimination();    InitGarbageElimination();    void InitAsyncThread();    InitAsyncThread();    // Note initialized.    Internal::GetUObjectSubsystemInitialised() = true;    UObjectProcessRegistrants();}//上边的函数调用下边的函数void FUObjectArray::AllocateObjectPool(int32 InMaxUObjects, int32 InMaxObjectsNotConsideredByGC, bool bPreAllocateObjectArray){    check(IsInGameThread());    MaxObjectsNotConsideredByGC = InMaxObjectsNotConsideredByGC;    // GObjFirstGCIndex is the index at which the garbage collector will start for the mark phase.    // If disregard for GC is enabled this will be set to an invalid value so that later we    // know if disregard for GC pool has already been closed (at least once)    ObjFirstGCIndex = DisregardForGCEnabled() ? -1 : 0;    // Pre-size array.    check(ObjObjects.Num() == 0);    UE_CLOG(InMaxUObjects <= 0, LogUObjectArray, Fatal, TEXT("Max UObject count is invalid. It must be a number that is greater than 0."));    ObjObjects.PreAllocate(InMaxUObjects, bPreAllocateObjectArray);    if (MaxObjectsNotConsideredByGC > 0)    {        ObjObjects.AddRange(MaxObjectsNotConsideredByGC);    }}

if (MaxObjectsNotConsideredByGC <= 0 && SizeOfPermanentObjectPool > 0){    // If permanent object pool is enabled but disregard for GC is disabled, GC will mark permanent object pool objects    // as unreachable and may destroy them so disable permanent object pool too.    // An alternative would be to make GC not mark permanent object pool objects as unreachable but then they would have to    // be considered as root set objects because they could be referencing objects from outside of permanent object pool.    // This would be inconsistent and confusing and also counter productive (the more root set objects the more expensive MarkAsUnreachable phase is).    SizeOfPermanentObjectPool = 0;    UE_LOG(LogInit, Warning, TEXT("Disabling permanent object pool because disregard for GC is disabled (gc.MaxObjectsNotConsideredByGC=%d)."), MaxObjectsNotConsideredByGC);}//对应下面的伪代码 ReName了变量 if ( MaxObjectsNotConsideredByGC <= 0 && SizeOfPermanentObjectPool > 0 ) {   v1 = 0;   SizeOfPermanentObjectPool = 0;   if ( (unsigned __int8)byte_14807DBE0 >= 3u )   {     sub_142A654A0(&byte_14807DBE0, &off_146698318);     v1 = SizeOfPermanentObjectPool;   }}

dword_148153F28 = MaxObjectsNotConsideredByGC;//以下是类成员分布//  /** First index into objects array taken into account for GC.                           *///  int32 ObjFirstGCIndex;//  /** Index pointing to last object created in range disregarded for GC.                  *///  int32 ObjLastNonGCIndex;//  /** Maximum number of objects in the disregard for GC Pool *///  int32 MaxObjectsNotConsideredByGC;