final touches

afl/src/engines/mod.rs

@@ -70,9 +70,7 @@ where
     {
         for entry in fs::read_dir(in_dir)? {
             let entry = entry?;
-
             let path = entry.path();
-
             let attributes = fs::metadata(&path);
 
             if !attributes.is_ok() {
@@ -81,13 +79,13 @@ where
 
             let attr = attributes?;
 
-            if attr.is_file() {
+            if attr.is_file() && attr.len() > 0 {
                 println!("Load file {:?}", &path);
-                let bytes = std::fs::read(path)?;
+                let bytes = std::fs::read(&path)?;
                 let input = BytesInput::new(bytes);
                 let fitness = self.evaluate_input(&input, engine.executor_mut())?;
                 if self.add_if_interesting(corpus, input, fitness)?.is_none() {
-                    println!("File {:?} was interesting, skipped.", &path);
+                    println!("File {:?} was not interesting, skipped.", &path);
                 }
             } else if attr.is_dir() {
                 self.load_from_directory(corpus, generator, engine, manager, &path)?;

fuzzers/libfuzzer/compiler

@@ -53,7 +53,7 @@ def ld_mode():
     args += sys.argv[1:]
     args += [
       os.path.join(script_dir, "runtime", "rt.o"),
-      os.path.join(script_dir, "target", "debug", "liblibfuzzer.a"),
+      os.path.join(script_dir, "target", "release", "liblibfuzzer.a"),
     ]
     
     args += ["-fsanitize-coverage=trace-pc-guard,trace-cmp"]

fuzzers/libfuzzer/src/lib.rs

@@ -164,6 +164,7 @@ pub extern "C" fn afl_libfuzzer_main() {
     }
 
     if corpus.count() < 1 {
+        println!("Generating random inputs");
         state
             .generate_initial_inputs(
                 &mut rand,

fuzzers/libfuzzer/test.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-cargo build || exit 1
+cargo build --release || exit 1
 make -C runtime || exit 1
 
 rm -f test_fuzz.elf test_fuzz.o