.buildbot.sh

#!/bin/sh

set -eu

TRACERS="hwt swt"

# Install rustup.
CARGO_HOME="$(pwd)/.cargo"
export CARGO_HOME
RUSTUP_HOME="$(pwd)/.rustup"
export RUSTUP_HOME
export RUSTUP_INIT_SKIP_PATH_CHECK="yes"
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh
sh rustup.sh --default-host x86_64-unknown-linux-gnu \
    --default-toolchain nightly \
    --no-modify-path \
    --profile default \
    -y
export PATH="${CARGO_HOME}"/bin/:"$PATH"

# Formatting problems are frequent in PRs, and easy to fix, so try and catch
# those before doing anything complicated.
cargo fmt --all -- --check

# We now need a copy of ykllvm. Building this is quite slow so if there's a
# cached version in `ykllvm_cache/` we use that. Whether we build our own or
# use a cached copy, the installed version ends up in ykllvm/inst. Notice that
# we use the release version because some of the checks we run below (e.g.
# unused warnings) otherwise run slowly.

cd ykllvm
ykllvm_hash=$(git rev-parse HEAD)
cached_ykllvm=0
if [ -f /opt/ykllvm_cache/ykllvm-release-with-assertions-"${ykllvm_hash}".tgz ]; then
    mkdir inst
    cd inst
    tar xfz /opt/ykllvm_cache/ykllvm-release-with-assertions-"${ykllvm_hash}".tgz
    # Minimally check that we can at least run `clang --version`: if we can't,
    # we assume the cached binary is too old (e.g. linking against old shared
    # objects) and that we should build our own version.
    if bin/clang --version > /dev/null; then
        cached_ykllvm=1
    else
        echo "Warning: cached ykllvm not runnable; building from scratch" > /dev/stderr
        cd ..
        rm -rf inst
    fi
fi

if [ "$cached_ykllvm" -eq 0 ]; then
    # We could let yk build two copies of LLVM, but we also want to: check that
    # YKB_YKLLVM_BIN_DIR works; and we want access to clang-format from a build
    # of LLVM. So we first build (or use a prebuilt version) of our
    # ykllvm-with-assertions, use the YKB_YKLLVM_BIN_DIR variable to have yk use
    # that, and use its clang-format.

    mkdir -p build
    cd build
    # Due to an LLVM bug, PIE breaks our mapper, and it's not enough to pass
    # `-fno-pie` to clang for some reason:
    # https://github.com/llvm/llvm-project/issues/57085
    cmake -DCMAKE_INSTALL_PREFIX="$(pwd)/../inst" \
        -DLLVM_INSTALL_UTILS=On \
        -DCMAKE_BUILD_TYPE=release \
        -DLLVM_ENABLE_ASSERTIONS=On \
        -DLLVM_ENABLE_PROJECTS="lld;clang" \
        -DCLANG_DEFAULT_PIE_ON_LINUX=OFF \
        -DBUILD_SHARED_LIBS=ON \
        -DCMAKE_C_COMPILER=/usr/bin/clang \
        -DCMAKE_CXX_COMPILER=/usr/bin/clang++ \
        -GNinja \
        ../llvm
    cmake --build .
    cmake --install .
fi
YKLLVM_BIN_DIR=$(pwd)/../inst/bin
export YKB_YKLLVM_BIN_DIR="${YKLLVM_BIN_DIR}"
cd ../../

# Check C/C++ formatting.
PATH=${YKB_YKLLVM_BIN_DIR}:${PATH} cargo xtask cfmt --check

cargo install cargo-diff-tools
if [ "$CI_RUNNER" = buildbot ] ; then
    # When running under buildbot, we need to `git fetch` data from the remote if we want
    # cargo-clippy-def to work later.
    git fetch origin master:refs/remotes/origin/master
fi
for tracer in ${TRACERS}; do
    export YKB_TRACER="${tracer}"
    # Check for annoying compiler warnings in each package.
    WARNING_DEFINES="-D unused-variables -D dead-code -D unused-imports"
    for p in $(sed -n -e '/^members =/,/^\]$/{/^members =/d;/^\]$/d;p;}' \
      Cargo.toml | \
      tr -d ' \t\",' | grep -v xtask); do
        echo "$WARNING_DEFINES" | xargs cargo rustc -p "$p" --profile check --lib --
        # For some reason, we can't do these checks on crates with binary targets.
        if [ "$p" != "ykrt" ] && [ "$p" != "tests" ]; then
            echo "$WARNING_DEFINES" | xargs cargo rustc -p "$p" --profile check --tests --
            echo "$WARNING_DEFINES" | xargs cargo rustc -p "$p" --profile check --benches --
        fi
    done
    echo "$WARNING_DEFINES" | xargs cargo rustc -p tests --profile check --bin dump_ir --
    echo "$WARNING_DEFINES" | xargs cargo rustc -p tests --profile check --bin gdb_c_test --
    echo "$WARNING_DEFINES" | xargs cargo rustc -p xtask --profile check --bin xtask --

    # Error if Clippy detects any warnings introduced in lines changed in this PR.
    cargo-clippy-diff origin/master -- --all-features -- -D warnings
done

# Run the tests multiple times on hwt to try and catch non-deterministic
# failures. But running everything so often is expensive, so run other tracers'
# tests just once.
export YKB_TRACER=hwt
echo "===> Running hwt tests"
for _ in $(seq 10); do
    RUST_TEST_SHUFFLE=1 cargo test
    YKD_NEW_CODEGEN=1 RUST_TEST_SHUFFLE=1 cargo test
done
for tracer in ${TRACERS}; do
    if [ "$tracer" = "hwt" ]; then
        continue
    fi
    echo "===> Running ${tracer} tests"
    RUST_TEST_SHUFFLE=1 cargo test
    YKD_NEW_CODEGEN=1 RUST_TEST_SHUFFLE=1 cargo test
done

# Test with LLVM sanitisers
rustup component add rust-src
# The thread sanitiser does have false positives (albeit much reduced by `-Z
# build-std`), so we have to add a suppression file to avoid those stopping
# this script from succeeding. This does mean that we might suppress some true
# positives, but there's little we can do about that.
suppressions_path=$(mktemp)
cat << EOF > "$suppressions_path"
# Thread sanitiser doesn't know about atomic operations.
race:core::sync::atomic::atomic_
# count_to_hot_location moves something into a mutex, at which point accesses
# to it are safe, but thread sanitiser doesn't seem to pick up the link between
# the two.
race:ykrt::location::Location::count_to_hot_location
EOF

for tracer in $TRACERS; do
    export YKB_TRACER="${tracer}"
    cargo build
    ASAN_SYMBOLIZER_PATH="${YKLLVM_BIN_DIR}/llvm-symbolizer" \
      RUSTFLAGS="-Z sanitizer=address" cargo test \
      -Z build-std \
      --target x86_64-unknown-linux-gnu

    RUST_TEST_THREADS=1 \
      RUSTFLAGS="-Z sanitizer=thread" \
      TSAN_OPTIONS="suppressions=$suppressions_path" \
      cargo test \
      -Z build-std \
      --target x86_64-unknown-linux-gnu
done

# Later on we are going to need to install cargo-deny and mdbook. We kick the
# install jobs off now so that at least some work (e.g. downloading crates) can
# happen in parallel, speeding up the overall process.

cargo_deny_mdbook_tmp=$(mktemp)
( cargo install --locked cargo-deny ; cargo install --locked mdbook ) \
  >"${cargo_deny_mdbook_tmp}" 2>&1 &
cargo_deny_mdbook_pid=$!

# We now want to test building with `--release`.

if [ "$cached_ykllvm" -eq 0 ]; then
    # If we don't have a cached copy of ykllvm, we also take this as an
    # opportunity to check that yk can build ykllvm, which requires unsetting
    # YKB_YKLLVM_BIN_DIR. In essence, we now repeat much of what we did above
    # but with `--release`.
    unset YKB_YKLLVM_BIN_DIR
    export YKB_YKLLVM_BUILD_ARGS="define:CMAKE_C_COMPILER=/usr/bin/clang,define:CMAKE_CXX_COMPILER=/usr/bin/clang++"
fi

for tracer in $TRACERS; do
    export YKB_TRACER="${tracer}"
    echo "===> Running ${tracer} tests"
    RUST_TEST_SHUFFLE=1 cargo test --release
    YKD_NEW_CODEGEN=1 RUST_TEST_SHUFFLE=1 cargo test --release
done

# We want to check that the benchmarks build and run correctly, but want to
# ignore the results, so run them for the minimum possible time.
#
# Note that --profile-time doesn't work without --bench, so we have to run each
# benchmark individually.
for b in collect_and_decode promote; do
    YKB_TRACER=hwt cargo bench --bench "${b}" -- --profile-time 1
done

# Check licenses.
wait "${cargo_deny_mdbook_pid}" || ( cat "${cargo_deny_mdbook_tmp}" && exit 1 )
cargo-deny check license

# Build the docs
cd docs
mdbook build
test -d book
cd ..