fuzz: test_runner: Better error message when built with afl

test/fuzz/test_runner.py

@@ -72,17 +72,22 @@ def main():
  logging.error("No fuzz targets selected")
  logging.info("Fuzz targets selected: {}".format(test_list_selection))
 
- help_output = subprocess.run(
- args=[
- os.path.join(config["environment"]["BUILDDIR"], 'src', 'test', 'fuzz', test_list_selection[0]),
- '-help=1',
- ],
- check=True,
- stderr=subprocess.PIPE,
- universal_newlines=True,
- ).stderr
- if "libFuzzer" not in help_output:
- logging.error("Must be built with libFuzzer")
+ try:
+ help_output = subprocess.run(
+ args=[
+ os.path.join(config["environment"]["BUILDDIR"], 'src', 'test', 'fuzz', test_list_selection[0]),
+ '-help=1',
+ ],
+ timeout=1,
+ check=True,
+ stderr=subprocess.PIPE,
+ universal_newlines=True,
+ ).stderr
+ if "libFuzzer" not in help_output:
+ logging.error("Must be built with libFuzzer")
+ sys.exit(1)
+ except subprocess.TimeoutExpired:
+ logging.error("subprocess timed out: Currently only libFuzzer is supported")
  sys.exit(1)
 
  run_once(