Move std-analysis.sh script from Kani repository (#261)

Copied from model-checking/kani@8d46dc61d89b8b1cb8a with the change that
the generated Cargo.toml is forced to edition2024 support to make it
work with Rust releases after 2025-02-26. This will re-enable
successfully gathering metrics.

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 and MIT licenses.

scripts/kani-std-analysis/std-analysis.sh

@@ -0,0 +1,120 @@
+#!/usr/bin/env bash
+# Copyright Kani Contributors
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
+# Collect some metrics related to the crates that compose the standard library.
+#
+# Files generates so far:
+#
+#  - ${crate}_scan_overall.csv: Summary of function metrics, such as safe vs unsafe.
+#  - ${crate}_scan_input_tys.csv: Detailed information about the inputs' type of each
+#    function found in this crate.
+#
+# How we collect metrics:
+#
+# - Compile the standard library using the `scan` tool to collect some metrics.
+# - After compilation, move all CSV files that were generated by the scanner,
+#   to the results folder.
+set -eu
+
+# Test for platform
+PLATFORM=$(uname -sp)
+if [[ $PLATFORM == "Linux x86_64" ]]
+then
+  TARGET="x86_64-unknown-linux-gnu"
+  # 'env' necessary to avoid bash built-in 'time'
+  WRAPPER="env time -v"
+elif [[ $PLATFORM == "Darwin i386" ]]
+then
+  TARGET="x86_64-apple-darwin"
+  # mac 'time' doesn't have -v
+  WRAPPER="time"
+elif [[ $PLATFORM == "Darwin arm" ]]
+then
+  TARGET="aarch64-apple-darwin"
+  # mac 'time' doesn't have -v
+  WRAPPER="time"
+else
+  echo
+  echo "Std-Lib codegen regression only works on Linux or OSX x86 platforms, skipping..."
+  echo
+  exit 0
+fi
+
+# Get Kani root
+if [[ $# -ne 1 ]]
+then
+  echo "Required command-line argument <KANI-DIR> missing"
+  exit 1
+fi
+KANI_DIR=$1
+
+echo "-------------------------------------------------------"
+echo "-- Starting analysis of the Rust standard library... --"
+echo "-------------------------------------------------------"
+
+echo "-- Build scanner"
+cd $KANI_DIR
+cargo build -p scanner
+
+echo "-- Build std"
+cd /tmp
+if [ -d std_lib_analysis ]
+then
+    rm -rf std_lib_analysis
+fi
+cargo new std_lib_analysis --lib
+cd std_lib_analysis
+sed -i '1i cargo-features = ["edition2024"]' Cargo.toml
+
+echo '
+pub fn dummy() {
+}
+' > src/lib.rs
+
+# Use same nightly toolchain used to build Kani
+cp ${KANI_DIR}/rust-toolchain.toml .
+
+export RUST_BACKTRACE=1
+export RUSTC_LOG=error
+
+RUST_FLAGS=(
+    "-Cpanic=abort"
+    "-Zalways-encode-mir"
+)
+export RUSTFLAGS="${RUST_FLAGS[@]}"
+export RUSTC="$KANI_DIR/target/debug/scan"
+# Compile rust with our extension
+$WRAPPER cargo build --verbose -Z build-std --lib --target $TARGET
+
+echo "-- Process results"
+
+# Move files to results folder
+results=/tmp/std_lib_analysis/results
+mkdir $results
+find /tmp/std_lib_analysis/target -name "*.csv" -exec mv {} $results \;
+
+# Create a summary table
+summary=$results/summary.csv
+
+# write header
+echo -n "crate," > $summary
+tr -d "[:digit:],;" < $results/alloc_scan_overall.csv \
+    | tr -s '\n' ',' >> $summary
+echo "" >> $summary
+
+# write body
+for f in $results/*overall.csv; do
+    # Join all crate summaries into one table
+    fname=$(basename $f)
+    crate=${fname%_scan_overall.csv}
+    echo -n "$crate," >> $summary
+    tr -d '[:alpha:]_,;' < $f | tr -s '\n' ',' \
+        >> $summary
+    echo "" >> $summary
+done
+
+echo "-------------------------------------------------------"
+echo "Finished analysis successfully..."
+echo "- See results at ${results}"
+echo "-------------------------------------------------------"

scripts/run-kani.sh

@@ -304,11 +304,9 @@ main() {
         local current_dir=$(pwd)
         echo "Running Kani list command..."
         "$kani_path" list -Z list $unstable_args ./library --std --format json
-        echo "Running Kani's std-analysis command..."
-        pushd $build_dir
-        ./scripts/std-analysis.sh
-        popd
         pushd scripts/kani-std-analysis
+        echo "Running Kani's std-analysis command..."
+        ./std-analysis.sh $build_dir
         pip install -r requirements.txt
         echo "Computing Kani-specific metrics..."
         ./kani_std_analysis.py --kani-list-file $current_dir/kani-list.json