UDocumentation UE5.7 10.02.2026 (Source)
API documentation for Unreal Engine 5.7
Defines.h
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1// Copyright Epic Games, Inc. All Rights Reserved.
2
3#pragma once
4
5#define INSTRUMENTATION_FUNCTION_ATTRIBUTES __declspec(safebuffers) __attribute__((disable_sanitizer_instrumentation))
6
7// Reserves 12 NOPs before the function and 2 NOPs at function entry so that we can patch atomically
8#define INSTRUMENTATION_HOTPATCH_TOTAL_NOPS 14
9#define INSTRUMENTATION_HOTPATCH_PREFIX_NOPS 12
10
11#define INSTRUMENTATION_FUNCTION_HOTPATCHABLE __attribute__((patchable_function_entry(INSTRUMENTATION_HOTPATCH_TOTAL_NOPS, INSTRUMENTATION_HOTPATCH_PREFIX_NOPS)))