attach-gdb

#!/usr/bin/env bash

[[ ! -z "$SUDO_USER" ]] && RUNUSER="$SUDO_USER" || RUNUSER="$LOGNAME"
RUNCMD="sudo -u $RUNUSER"

$RUNCMD bash ./scripts/updater true
$RUNCMD bash ./report-crash true

line=$(pgrep -u $RUNUSER hl2_linux)
arr=($line)

if [ $# == 1 ]; then
    proc=$1
else
    if [ ${#arr[@]} == 0 ]; then
        echo TF2 isn\'t running!
        exit
    fi
    proc=${arr[0]}
fi

echo Running instances: "${arr[@]}"
echo Attaching to "$proc"

#sudo ./detach $inst bin/libcathook.so

#if grep -q "$(realpath bin/libcathook.so)" /proc/"$proc"/maps; then
#  echo already loaded
#  exit
#fi

FILENAME="/tmp/.gl$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | head -c 6)"

cp "bin/libcathook.so" "$FILENAME"

echo loading "$FILENAME" to "$proc"

gdbbin="gdb"
if [ -x "./bin/gdb-arch-2021-02" ]; then
  gdbbin="./bin/gdb-arch-2021-02"
fi

$gdbbin -n -q -batch                                                        \
    -ex "attach $proc"                                                  \
    -ex "echo \033[1mCalling dlopen\033[0m\n"                           \
    -ex "call ((void*(*)(const char*, int))dlopen)(\"$FILENAME\", 1)"   \
    -ex "echo \033[1mCalling dlerror\033[0m\n"                          \
    -ex "call ((char*(*)(void))dlerror)()"                              \
    -ex "continue"                                                      \
    -ex "backtrace"

rm $FILENAME