Fixes #404: Use log.rs and a file-per-thread logger instead of the dbg! macro;

lib/filetests/src/concurrent.rs

@@ -3,7 +3,9 @@
 //! This module provides the `ConcurrentRunner` struct which uses a pool of threads to run tests
 //! concurrently.
 
+use cranelift_codegen::dbg::LOG_FILENAME_PREFIX;
 use cranelift_codegen::timing;
+use file_per_thread_logger;
 use num_cpus;
 use std::panic::catch_unwind;
 use std::path::{Path, PathBuf};
@@ -100,6 +102,7 @@ fn heartbeat_thread(replies: Sender<Reply>) -> thread::JoinHandle<()> {
     thread::Builder::new()
         .name("heartbeat".to_string())
         .spawn(move || {
+            file_per_thread_logger::initialize(LOG_FILENAME_PREFIX);
             while replies.send(Reply::Tick).is_ok() {
                 thread::sleep(Duration::from_secs(1));
             }
@@ -116,6 +119,7 @@ fn worker_thread(
     thread::Builder::new()
         .name(format!("worker #{}", thread_num))
         .spawn(move || {
+            file_per_thread_logger::initialize(LOG_FILENAME_PREFIX);
             loop {
                 // Lock the mutex only long enough to extract a request.
                 let Request(jobid, path) = match requests.lock().unwrap().recv() {
@@ -140,7 +144,7 @@ fn worker_thread(
                 });
 
                 if let Err(ref msg) = result {
-                    dbg!("FAIL: {}", msg);
+                    error!("FAIL: {}", msg);
                 }
 
                 replies.send(Reply::Done { jobid, result }).unwrap();

lib/filetests/src/lib.rs

@@ -18,11 +18,13 @@
     )
 )]
 
-#[macro_use(dbg)]
 extern crate cranelift_codegen;
+extern crate file_per_thread_logger;
 extern crate cranelift_reader;
 extern crate filecheck;
 extern crate num_cpus;
+#[macro_use]
+extern crate log;
 
 use cranelift_reader::TestCommand;
 use runner::TestRunner;

lib/filetests/src/runone.rs

@@ -29,7 +29,7 @@ fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
 /// If running this test causes a panic, it will propagate as normal.
 pub fn run(path: &Path) -> TestResult {
     let _tt = timing::process_file();
-    dbg!("---\nFile: {}", path.to_string_lossy());
+    info!("---\nFile: {}", path.to_string_lossy());
     let started = time::Instant::now();
     let buffer = read_to_string(path).map_err(|e| e.to_string())?;
     let testfile = parse_test(&buffer).map_err(|e| e.to_string())?;
@@ -122,7 +122,7 @@ fn run_one_test<'a>(
 ) -> SubtestResult<()> {
     let (test, flags, isa) = tuple;
     let name = format!("{}({})", test.name(), func.name);
-    dbg!("Test: {} {}", name, isa.map_or("-", TargetIsa::name));
+    info!("Test: {} {}", name, isa.map_or("-", TargetIsa::name));
 
     context.flags = flags;
     context.isa = isa;

lib/filetests/src/test_compile.rs

@@ -41,7 +41,7 @@ impl SubTest for TestCompile {
             .compile(isa)
             .map_err(|e| pretty_error(&comp_ctx.func, context.isa, e))?;
 
-        dbg!(
+        info!(
             "Generated {} bytes of code:\n{}",
             code_size,
             comp_ctx.func.display(isa)