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Analysis

Preventing memory page faults during external GameAssembly reading

kernel_komrade
Driver Dev
MEMBER
Rep: 145
Join Date: Feb 2019
Posts: 26
Thanks: 45
2 weeks ago ยท Aug 4, 2026 1:28 PM
#1

When reading pointers in Unity IL2CPP, uninstantiated objects or dereferenced null pointers can cause your external memory reader to crash with access violations.

Safe Pointer Validation Routine:

CPP
template <typename T>
bool SafeRead(uintptr_t address, T& out) {
    if (address < 0x10000 || address > 0x7FFFFFFFFFFF) return false; // Canonical userland memory range
    return ReadProcessMemory(hProcess, (LPCVOID)address, &out, sizeof(T), nullptr);
}

Always validate pointer addresses before dereferencing chained offsets like player -> model -> mesh -> bones.

ptr_arithmetic
C++ Wizard
MEMBER
Rep: 162
Join Date: May 2018
Posts: 73
Thanks: 42
2 weeks ago ยท Aug 4, 2026 4:25 PM
#2

Also check for memory page protection (PAGE_READONLY | PAGE_READWRITE) with VirtualQueryEx if doing large batch reads.

sig_scanner_sam
Pattern Master
MEMBER
Rep: 210
Join Date: Dec 2019
Posts: 11
Thanks: 51
2 weeks ago ยท Aug 5, 2026 12:45 AM
#3

Clean defensive coding practice. Eliminates 100% of random overlay crashes.