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Append harness name to the graph file (debug feature only) #3528

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Merged
celinval merged 1 commit into from
Sep 23, 2024
Merged

Append harness name to the graph file (debug feature only) #3528

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12 changes: 9 additions & 3 deletions kani-compiler/src/kani_middle/reachability.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ pub fn collect_reachable_items(
#[cfg(debug_assertions)]
collector
.call_graph
.dump_dot(tcx)
.dump_dot(tcx, starting_points.first().cloned())
.unwrap_or_else(|e| tracing::error!("Failed to dump call graph: {e}"));

tcx.dcx().abort_if_errors();
Expand Down Expand Up @@ -579,12 +579,18 @@ impl CallGraph {

/// Print the graph in DOT format to a file.
/// See <https://graphviz.org/doc/info/lang.html> for more information.
fn dump_dot(&self, tcx: TyCtxt) -> std::io::Result<()> {
fn dump_dot(&self, tcx: TyCtxt, initial: Option<MonoItem>) -> std::io::Result<()> {
if let Ok(target) = std::env::var("KANI_REACH_DEBUG") {
debug!(?target, "dump_dot");
let name = initial.map(|item| Node(item).to_string()).unwrap_or_default();
let outputs = tcx.output_filenames(());
let base_path = outputs.path(OutputType::Metadata);
let path = base_path.as_path().with_extension("dot");
let file_stem = format!(
"{}_{}.dot",
base_path.as_path().file_stem().unwrap().to_string_lossy(),
name
);
let path = base_path.as_path().parent().unwrap().join(file_stem);
let out_file = File::create(path)?;
let mut writer = BufWriter::new(out_file);
writeln!(writer, "digraph ReachabilityGraph {{")?;
Expand Down