dankmeme01

Easy debugging of Geode mods with HWASan

ASan (and it's younger brother, HWASan) are incredible tools for debugging memory integrity bugs in native applications. This guide explains how to set up HWASan for Geode mods on Android and how to analyze crashes.

Requirements:

• Device running Android 14+, lower is possible but only with ASan, which has a slightly different way of setting up. See here
• Android Studio or any other way of building the launcher

Build the mod

lipx1508

#include <stdio.h>
#include <stddef.h>
#include <stdint.h>

#define REPEAT_1(__fn) __fn(1)
#define REPEAT_2(__fn) REPEAT_1(__fn) __fn(2)
#define REPEAT_3(__fn) REPEAT_2(__fn) __fn(3)
#define REPEAT_4(__fn) REPEAT_3(__fn) __fn(4)
#define REPEAT_5(__fn) REPEAT_4(__fn) __fn(5)
#define REPEAT_6(__fn) REPEAT_5(__fn) __fn(6)

SMJSProductions

interface OverlapConfig {
    bits: number;
    overlap: number;
}

interface WriteConfig {
    length: number;
    value: bigint;
}

JavaScript-Packer

function en(c) {
  var x = "charCodeAt", b, e = {}, f = c.split(""), d = [], a = f[0], g = 256;
  for (b = 1; b < f.length; b++) c = f[b], null != e[a + c] ? a += c :(d.push(1 < a.length ? e[a] :a[x](0)), 
  e[a + c] = g, g++, a = c);
  d.push(1 < a.length ? e[a] :a[x](0));
  for (b = 0; b < d.length; b++) d[b] = String.fromCharCode(d[b]);
  return d.join("");
}

function de(b) {

yiwenl

float contrast(float mValue, float mScale, float mMidPoint) {
	return clamp( (mValue - mMidPoint) * mScale + mMidPoint, 0.0, 1.0);
}

float contrast(float mValue, float mScale) {
	return contrast(mValue,  mScale, .5);
}

vec3 contrast(vec3 mValue, float mScale, float mMidPoint) {
	return vec3( contrast(mValue.r, mScale, mMidPoint), contrast(mValue.g, mScale, mMidPoint), contrast(mValue.b, mScale, mMidPoint) );