#!/bin/bash

set -eux

root=$(dirname "$0")/..
export ASAN_OPTIONS="quarantine_size_mb=10:detect_leaks=1:symbolize=1"
export UBSAN="print_stacktrace=1:halt_on_error=1:symbolize=1"

# check if CI env var exists

if [ -z "${CI:-}" ]; then
  declare -A mode_config=( ["halt"]="-timeout=1 -rss_limit_mb=2048" ["recover"]="-timeout=10 -rss_limit_mb=2048" )
else
  declare -A mode_config=( ["halt"]="-max_total_time=120 -timeout=1 -rss_limit_mb=2048" ["recover"]="-time=120 -timeout=10 -rss_limit_mb=2048" )
fi

run_fuzzer() {
  if [ "$#" -lt 2 ]; then
    echo "usage: $0 <language> <halt|recover> <libFuzzer args...>"
    exit 1
  fi

  lang="$1"
  shift
  mode="$1"
  shift
  # Treat remainder of arguments as libFuzzer arguments

  # Fuzzing logs and testcases are always written to `pwd`, so `cd` there first
  results="${root}/test/fuzz/out/fuzz-results/${lang}"
  mkdir -p "${results}"
  cd "${results}"

  # Create a corpus directory, so new discoveries are stored on disk. These will
  # then be loaded on subsequent fuzzing runs
  mkdir -p corpus

  pwd
  "../../${lang}_fuzzer" "-dict=../../${lang}.dict" "-artifact_prefix=${lang}_" -max_len=2048 "${mode_config[$mode]}" "./corpus" "$@"
}

reproduce() {
  if [ "$#" -lt 3 ]; then
    echo "usage: $0 <language> (halt|recover) <testcase> <libFuzzer args...>"
    exit 1
  fi

  lang="$1"
  shift
  mode="$1"
  shift
  testcase="$1"
  shift
  # Treat remainder of arguments as libFuzzer arguments

  "${root}/test/fuzz/out/${lang}_fuzzer" "${mode_config[$mode]}" -runs=1 "${testcase}" "$@"
}

script=$(basename "$0")
if [ "$script" == "run-fuzzer" ]; then
  run_fuzzer "$@"
elif [ "$script" == "reproduce" ]; then
  reproduce "$@"
fi