name: Check Update Default Stack Size

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  stack_size:
    strategy:
      matrix:
        os: [ubuntu-latest, ubuntu-24.04, ubuntu-22.04]
    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # 6.0.0

      - name: Download Monero
        uses: ./.github/actions/monero

      - name: Verify expected behavior
        shell: bash
        run: |
          cp /usr/bin/monerod monerod

          STACK=$((8 * 1024 * 1024))

          cp monerod monerod-chelf
          git clone https://github.com/Gottox/chelf
          cd chelf
          git checkout b2994186cea7b7d61a588fd06c1cc1ae75bcc21a
          make
          ./chelf -s $STACK ../monerod-chelf
          cd ..

          cp monerod monerod-muslstack
          GOBIN=$(pwd) go install github.com/yaegashi/muslstack@d19cc5866abce3ca59dfc1666df7cc97097d0933
          ./muslstack -s $STACK ./monerod-muslstack

          sudo apt update -y
          sudo apt upgrade -y
          sudo apt install -y ksh bash tcsh dash zsh busybox
          sudo ln -s $(which busybox) /usr/bin/ash
          sudo ln -s $(which busybox) /usr/bin/hush
          for shell in sh ksh bash tcsh dash zsh ash hush; do
            cp monerod monerod-idss-$shell
            ln -s $(which $shell) sh
            ./sh ./orchestration/increase_default_stack_size.sh monerod-idss-$shell
            rm ./sh
          done

          find . -iname "monerod-*" | while read -r bin; do
            readelf $bin -l
            sha256sum $bin
          done

          find . -iname "monerod-*" | while read -r bin; do
            if [ ! $(sha256sum monerod-chelf | cut -d' ' -f1) = $(sha256sum $bin | cut -d' ' -f1) ]; then
              exit 1
            fi
          done

          read_stack() {
            printf "%i" $((readelf $1 -l | grep STACK -A1 | tail -n1 | sed -E s/^[[:space:]]*//g | cut -f2 -d' '))
          }
          INITIAL_STACK=$(read_stack monerod)
          if [ "$INITIAL_STACK" -ne "0" ]; then
            echo "Initial \`PT_GNU_STACK\` wasn't 0"
            exit 2
          fi

          UPDATED_STACK=$(read_stack monerod-chelf)
          if [ "$UPDATED_STACK" -ne "$STACK" ]; then
            echo "Updated \`PT_GNU_STACK\` wasn't 8 MB"
            exit 3
          fi

          # Only one byte should be different due to the bit pattern of 8 MB
          BYTES_DIFFERENT=$(cmp -l monerod monerod-chelf | wc -l)
          if [ "$BYTES_DIFFERENT" -ne 1 ]; then
            echo "More than one byte was different between the two binaries"
            exit 4
          fi