#!/bin/bash

# This script requires Google's depot_tools for Breakpad, a Minecraft PE APK and a crash .DMP file

if [ "$#" -ne 2 ]; then
	echo "Usage: $0 <apk file> <crashdump file>"
	exit 1
fi

APK_FILE="$1"
if [ ! -f "$APK_FILE" ]; then
	echo "$APK_FILE does not exist"
	echo "Usage: $0 <apk file> <crashdump file>"
	exit 1
fi
CRASH_FILE="$2"
if [ ! -f "$CRASH_FILE" ]; then
	echo "$CRASH_FILE does not exist"
	echo "Usage: $0 <apk file> <crashdump file>"
	exit 1
fi

rm -rf .apk
mkdir .apk
unzip "$APK_FILE" -d .apk

SO_FILE=libminecraftpe.so
SO_PATH=./.apk/lib/armeabi-v7a/"$SO_FILE"

dump_syms "$SO_PATH" > ./"$SO_FILE.sym"

HEX_PATH=$(head -n1 "$SO_FILE.sym" | cut -f4 -d" ")
MODULE_NAME=$(head -n1 "$SO_FILE.sym" | cut -f5 -d" ")

mkdir -p ./symbols/"$MODULE_NAME"/"$HEX_PATH"
mv ./"$SO_FILE.sym" ./symbols/"$MODULE_NAME"/"$HEX_PATH"/

OUTPUT_FILE="$CRASH_FILE.decoded.txt"
minidump_stackwalk "$CRASH_FILE" ./symbols > "$OUTPUT_FILE"

echo "Wrote decoded crashdump to $OUTPUT_FILE"