creduce support

tests/fuzz/creduce_tester.py

@@ -0,0 +1,53 @@
+#!/usr/bin/python
+
+'''
+Runs csmith, a C fuzzer, and looks for bugs
+'''
+
+import os, sys, difflib
+from subprocess import Popen, PIPE, STDOUT
+
+sys.path += [os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), 'tools')]
+import shared
+
+filename = sys.argv[1]
+print 'testing file', filename
+
+print '2) Compile natively'
+shared.try_delete(filename)
+shared.execute([shared.CLANG_CC, '-O2', filename + '.c', '-o', filename] + CSMITH_CFLAGS, stderr=PIPE)
+assert os.path.exists(filename)
+print '3) Run natively'
+try:
+  correct = shared.timeout_run(Popen([filename], stdout=PIPE, stderr=PIPE), 3)
+except Exception, e:
+  print 'Failed or infinite looping in native, skipping', e
+  notes['invalid'] += 1
+  os.exit(0) # boring 
+
+print '4) Compile JS-ly and compare'
+
+def try_js(args):
+  shared.try_delete(filename + '.js')
+  shared.execute([shared.EMCC, '-O2', '-s', 'ASM_JS=1', '-s', 'PRECISE_I64_MATH=1', '-s', 'PRECISE_I32_MUL=1', filename + '.c', '-o', filename + '.js'] + CSMITH_CFLAGS + args, stderr=PIPE)
+  assert os.path.exists(filename + '.js')
+  js = shared.run_js(filename + '.js', stderr=PIPE, engine=engine1)
+  assert correct == js, ''.join([a.rstrip()+'\n' for a in difflib.unified_diff(correct.split('\n'), js.split('\n'), fromfile='expected', tofile='actual')])
+
+# Try normally, then try unaligned because csmith does generate nonportable code that requires x86 alignment
+ok = False
+normal = True
+for args, note in [([], None), (['-s', 'UNALIGNED_MEMORY=1'], 'unaligned')]:
+  try:
+    try_js(args)
+    ok = True
+    if note:
+      notes[note] += 1
+    break
+  except Exception, e:
+    print e
+    normal = False
+if not ok: sys.exit(1)
+
+sys.exit(0) # boring
+

tests/fuzz/csmith_driver.py

@@ -20,7 +20,7 @@ CSMITH_CFLAGS = ['-I' + os.path.expanduser('~/Dev/csmith/runtime/')]
 
 filename = os.path.join(shared.CANONICAL_TEMP_DIR, 'fuzzcode')
 
-shared.DEFAULT_TIMEOUT = 3
+shared.DEFAULT_TIMEOUT = 1
 
 tried = 0