Fixed conditionals rarely evaluating

Added the setting in the yaml for truthiness, and added a timeout error to the code generation.

Need to fix the generation error that prevents a large amount of code from being generated...

Took 1 hour 47 minutes

ast_generator/ast_generator.py

@@ -3,6 +3,7 @@ import warnings
 
 from english_words import get_english_words_set
 
+from ast_generator.tiny_py_unparse import TinyPyUnparser
 from ast_generator.utils import *
 from ast_generator.utils import filter_options, _choose_option
 from constants import *
@@ -436,13 +437,66 @@ class AstGenerator:
         self.make_scoped_element(GAZ_LOOP_TAG, [])
         self.current_control_flow_nesting_depth += 1
 
-        self.generate_expression(GAZ_BOOL_KEY)  # the loop entry condition  #TODO force true
+        truthiness = self.get_truthiness()
+
+        while True:
+            self.generate_expression(GAZ_BOOL_KEY)  # the loop entry condition  #TODO force true, if false, generate a simple block and return, no need to nest code we won't use
+
+            iterator = self.current_ast_element.iter()
+            next(iterator)
+            conditional = next(iterator)
+            if not self.truth_check(conditional, truthiness):
+                self.current_ast_element.remove(conditional)
+            else:
+                break
+
         self.generate_block(block_type=GAZ_LOOP_TAG,
                             loop_var=init_var)  # append a variable increment and prepend a break statement if var is > max loop iterations
 
         self.current_control_flow_nesting_depth -= 1
         self.exit_scoped_element(parent)
 
+    def get_truthiness(self):
+        return random.random() < self.settings['misc-weights']['truthiness']
+
+    def truth_check(self, element: ET.Element, truthiness: bool):
+        # evaluate the element
+        uncompiled = self.unparse_conditional_statement(element)
+        substr1 = uncompiled.find("**")
+        substr2 = uncompiled.find("**", substr1 + 1)
+
+        if -1 not in [substr1, substr2]:
+            return False
+
+        # print(uncompiled)
+        try:
+            res = eval(uncompiled)
+        except (OverflowError, ZeroDivisionError):
+            res = False
+
+        # check it against truthiness and return the comparison
+        return res == truthiness
+
+    def unparse_conditional_statement(self, element: ET.Element):
+        py_unparse = TinyPyUnparser(element, True)
+        unparsed = ""
+        if element.tag == GAZ_LIT_TAG:
+            py_unparse.unparse_literal(element)
+            unparsed = py_unparse.source
+        elif element.tag == GAZ_OPERATOR_TAG:
+            py_unparse.unparse_operator(element)
+            unparsed = py_unparse.source
+        elif element.tag == GAZ_VAR_TAG:
+            xml = self.current_scope.resolve(element.get("name"))
+            py_unparse.unparse_variable(xml)
+            unparsed = py_unparse.source
+        elif element.tag == GAZ_BRACKET_TAG:
+            py_unparse.unparse_brackets(element)
+            unparsed = py_unparse.source
+        else:
+            raise ValueError("Unknown element type for conditional argument: " + element.tag)
+        return unparsed
+
     def generate_zero_declaration(self):
         """
         @brief generate a declaration int a = 0 for some a

ast_generator/test/config.yaml

@@ -90,9 +90,7 @@ misc-weights:
     type-qualifier-weights:
         const: 10
         var: 60
-    conditional-eval:
+    truthiness: 0.9                              # Probability of conditionals being true
-        true: 50
-        false: 50
 
 block-termination-probability: 0.2               # probability for a block to terminate
 

ast_generator/test/test_ast_generator.py

@@ -245,12 +245,13 @@ class TestGeneration(unittest.TestCase):
             self.assertFalse(self.is_no_op(operator))
 
     def test_create_global(self):
-        self.ast_gen.ast = ET.Element("block")
+        element = ET.Element("block")
+        self.ast_gen.ast = element
         self.ast_gen.current_ast_element = self.ast_gen.ast
         self.ast_gen.generate_main()
 
-        global_block = self.ast_gen.current_ast_element
+        global_block = element
-        global_scope = self.ast_gen.current_scope
+        global_scope = self.ast_gen.current_scope.get_top_scope()
 
         self.assertIsNotNone(self.ast_gen.ast.find("procedure"))
         self.ast_gen.current_ast_element = self.ast_gen.ast.find("procedure")
@@ -310,8 +311,10 @@ class TestGeneration(unittest.TestCase):
         return res
 
     def test_print_all_current_scope_vars(self):
-        self.ast_gen.ast = ET.Element("block")
+        element = ET.Element("block")
-        self.ast_gen.current_ast_element = self.ast_gen.ast
+        self.ast_gen.ast = element
+        self.ast_gen.current_ast_element = element
+        self.ast_gen.current_scope = Scope(None)
         self.ast_gen.generate_declaration(mut='var')
         self.ast_gen.generate_declaration(mut='var')
         self.ast_gen.generate_declaration(mut='var')
@@ -319,12 +322,67 @@ class TestGeneration(unittest.TestCase):
 
         self.ast_gen.print_all_current_scope_vars()
 
-        print(ET.tostring(self.ast_gen.ast))
+
+        # print(ET.tostring(self.ast_gen.ast))
 
         streams = self.ast_gen.ast.findall("stream")
 
         self.assertEqual(4, len(streams))
 
+    def test_conditional_test_1(self):
+        element = ET.fromstring('<literal type="bool" value="False"/>')
+
+        self.assertIsNotNone(element)
+
+        res = self.ast_gen.truth_check(element, True)
+        self.assertFalse(res)
+
+    def test_conditional_test_2(self):
+        element = ET.fromstring('<literal type="bool" value="True"/>')
+        self.assertIsNotNone(element)
+
+        res = self.ast_gen.truth_check(element, True)
+        self.assertTrue(res)
+
+    def test_conditional_test_3(self):
+        with open("xml/conditional.xml", 'r') as f:
+            element = ET.fromstring(f.read())
+
+        self.assertIsNotNone(element)
+
+        res = self.ast_gen.truth_check(element, True)
+        self.assertTrue(res)
+
+    def test_conditional_test_4(self):
+        with open("xml/conditional_2.xml", 'r') as f:
+            element = ET.fromstring(f.read())
+
+        self.assertIsNotNone(element)
+
+        res = self.ast_gen.truth_check(element, True)
+        self.assertFalse(res)
+
+    def test_conditional_test_5(self):
+        with open("xml/conditional_3.xml", 'r') as f:
+            element = ET.fromstring(f.read())
+
+        self.assertIsNotNone(element)
+
+        res = self.ast_gen.truth_check(element, True)
+        self.assertTrue(res)
+
+    # def test_conditional_test_variable(self):
+    #     element = ET.fromstring('<variable name="harold" type="int" mut="var"/>')
+    #
+    #     var = Variable("harold", "int", "var")
+    #     var.decl_xml = ET.fromstring('<literal type="bool" value="True"/>')
+    #     self.ast_gen.current_scope.append("harold", element)
+    #     self.assertIsNotNone(element)
+    #
+    #     res = self.ast_gen.truth_check(element, True)
+    #     self.assertTrue(res)
+
+
     def write_ast(self):
         dom = xml.dom.minidom.parseString(ET.tostring(self.ast_gen.ast).decode('utf-8'))
         pretty: str = dom.toprettyxml()

ast_generator/test/xml/conditional.xml

@@ -0,0 +1,8 @@
+<operator op="==" type="int">
+    <lhs>
+        <literal mut="var" type="int" value="42"/>
+    </lhs>
+    <rhs>
+        <literal type="int" value="42" />
+    </rhs>
+</operator>

ast_generator/test/xml/conditional_2.xml

@@ -0,0 +1,8 @@
+<operator op="!=" type="int">
+    <lhs>
+        <literal mut="var" type="int" value="42"/>
+    </lhs>
+    <rhs>
+        <literal type="int" value="42" />
+    </rhs>
+</operator>

ast_generator/test/xml/conditional_3.xml

@@ -0,0 +1,15 @@
+<operator op="!=" type="int">
+    <lhs>
+        <literal mut="var" type="int" value="False"/>
+    </lhs>
+    <rhs>
+        <operator op=">" type="int">
+            <lhs>
+                <literal mut="var" type="int" value="43"/>
+            </lhs>
+            <rhs>
+                <literal type="int" value="42" />
+            </rhs>
+        </operator>
+    </rhs>
+</operator>

ast_generator/tiny_py_unparse.py

@@ -0,0 +1,101 @@
+from ast_parser.general_unparser import GeneralUnparser
+
+
+import warnings
+from xml.etree import ElementTree as ET
+
+from ast_parser.gaz_unparser import GazUnparser
+from ast_parser.general_unparser import GeneralUnparser
+from constants import *
+
+
+def to_python_type(ty):
+    if ty == GAZ_INT_KEY:
+        return "int"
+    elif ty == GAZ_BOOL_KEY:
+        return "bool"
+    elif ty == GAZ_FLOAT_KEY:
+        return "float"
+    elif ty == GAZ_CHAR_KEY:
+        return "str"
+    elif ty == GAZ_STRING_KEY:
+        return "str"
+    else:
+        raise Exception("Unknown type: " + ty)
+
+
+def to_python_op(param, ty):
+    if param == "negation" or param == "subtraction":
+        return "-"
+    elif param == "addition" or param == "noop":
+        return "+"
+    elif param == "multiplication":
+        return "*"
+    elif param == "division" and ty != GAZ_INT_KEY:
+        return "/"
+    elif param == "division" and ty == GAZ_INT_KEY:
+        return "//"
+    elif param == "modulo":
+        return "%"
+    elif param == "power":
+        return "**"
+    elif param == "equality":
+        return "=="
+    elif param == "inequality":
+        return "!="
+    elif param == "less-than":
+        return "<"
+    elif param == "less-than-or-equal":
+        return "<="
+    elif param == "greater-than":
+        return ">"
+    elif param == "greater-than-or-equal":
+        return ">="
+    elif param == "xor":
+        return "!="
+    else:
+        warnings.warn("Warning, unknown operator: " + param)
+        return param
+
+
+class TinyPyUnparser(GeneralUnparser):
+    def __init__(self, ast: ET.Element, debug=False):
+        super().__init__(ast, debug,
+                         endline='\n',
+                         outstream_begin_delimiter="gprint(",
+                         outstream_end_delimiter=", end='')",
+                         function_return_type_indicator_predicate="->",
+                         loop_start_delimiter="while ",
+                         loop_end_delimiter=":",
+                         conditional_case_delimiter="elif ",
+                         conditional_start_delimiter="if ",
+                         conditional_else_delimiter="else:",
+                         conditional_end_delimiter=":",
+                         block_start_delimiter="",
+                         block_end_delimiter="",  # TODO can this contain the pass?
+                         strip_conditionals=True)
+
+        self.source = ''
+
+    def format_variable(self, mut, ty, name, declaration: bool = False):
+        if declaration:
+            return "{}: {}".format(name, ty)
+        else:
+            return "{}".format(name)
+
+    def translate_value(self, val):
+        return str(val)
+
+    def translate_op(self, param, ty=None):
+        return to_python_op(param, ty)
+
+    def translate_type(self, ty):
+        return to_python_type(ty)
+
+    def unparse_block(self, node):
+        raise TypeError("Cannot unparse blocks for this type of evaluation")
+
+    def setup(self):
+        pass
+
+

ast_generator/utils.py

@@ -5,12 +5,13 @@ from constants import GAZ_VAR_TAG, GAZ_ARG_TAG
 
 
 class Variable:
-    def __init__(self, name: str, type: str, qualifier: str, value: any = None):
+    def __init__(self, name: str, type: str, qualifier: str, value: any = None):  # decl_xml: ET.Element = None,
         self.name = name
         self.type = type
         self.value = value
         self.qualifier = qualifier
         self.xml = self._build_xml()
+        # self.decl_xml = decl_xml
 
     def _build_xml(self):
         args = [

config.yaml

@@ -4,7 +4,7 @@ generation-options:
     max-nesting-depth: 5                         # maximum nesting depth for statements
     max-conditionals-loops: 5                    # maximum number of loops/conditionals per routine
     max-number-of-routines: 5                    # maximum number of routines (main will always be generated)
-    generate-dead-code: True                     # generate dead code
+    generate-dead-code: False                     # generate dead code
     max-loop-iterations: 100                     # maximum number of iterations in a loop
     max-globals: 5                               # maximum number of global variables
 properties:
@@ -90,9 +90,7 @@ misc-weights:
     type-qualifier-weights:
         const: 10
         var: 60
-    conditional-eval:
+    truthiness: 0.9                              # Probability of conditionals being true
-        true: 50
-        false: 50
 
 block-termination-probability: 0.2               # probability for a block to terminate
 

gazprea_fuzzer.py

@@ -14,6 +14,8 @@ import xml.etree.ElementTree as ET
 
 from constants import NoneTagException
 
+import signal as sig
+
 
 def gprint(expr, end=''):
     if type(expr) is bool:
@@ -37,6 +39,9 @@ class Fuzzer():
         self.fuzzer = fz.GazpreaFuzzer(config)
 
     def fuzz(self):
+        sig.signal(sig.SIGALRM, handler)
+        sig.alarm(30)
+
         base_dir = os.getcwd()
         fuzzer_root = base_dir + '/fuzzer'
 
@@ -71,7 +76,10 @@ class Fuzzer():
                               "Look for a top-level <argument> tag or send it to Ayrton and I'll see what I can see"
                               "".format(r))
                 with open(f"{fuzzer_asterr}/{r}.xml", 'w') as f:
-                    f.write(xml.dom.minidom.parseString(ET.tostring(self.fuzzer.ast).decode('utf-8')).toprettyxml())
+                    try:
+                        f.write(xml.dom.minidom.parseString(ET.tostring(self.fuzzer.ast).decode('utf-8')).toprettyxml())
+                    except AttributeError:
+                        print("Failed to write to the file", file=sys.stderr)
                 if i - 1 >= min_i:
                     i -= 1
                 else:
@@ -90,7 +98,7 @@ class Fuzzer():
                             exec(read, globals())
                         except (OverflowError, ZeroDivisionError, ValueError, TypeError, SyntaxError):
                             os.system("rm -f {}/{}_{}.py".format(fuzzer_ground_truth, self.file_name, i))
-                            os.system("rm -f {}/{}_{}.py".format(fuzzer_outputs, self.file_name, i))
+                            os.system("rm -f {}/{}_{}.out".format(fuzzer_outputs, self.file_name, i))
                             warnings.warn("Runtime error encountered, retrying")
                             if i - 1 >= min_i:
                                 i -= 1
@@ -105,6 +113,31 @@ class Fuzzer():
                                 f.write(xml.dom.minidom.parseString(
                                     ET.tostring(self.fuzzer.ast).decode('utf-8')).toprettyxml())
                             sys.exit(1)
+                        except TimeoutError:
+                            r = random.randint(0, 1000000)
+                            warnings.warn("Execution timed out, result written to debug/ast/{}.xml\n"
+                                          "".format(r))
+                            with open("{}/{}.xml".format(fuzzer_asterr, r), 'w') as f:
+                                f.write(xml.dom.minidom.parseString(
+                                    ET.tostring(self.fuzzer.ast).decode('utf-8')).toprettyxml())
+                            if i - 1 >= min_i:
+                                i -= 1
+                            else:
+                                i = min_i
+                            continue
+
+                with open("{}/{}_{}.out".format(fuzzer_outputs, self.file_name, i), 'r') as y:
+                    out = y.read()
+                if out == "":
+                    os.system("rm -f {}/{}_{}.py".format(fuzzer_ground_truth, self.file_name, i))
+                    os.system("rm -f {}/{}_{}.out".format(fuzzer_outputs, self.file_name, i))
+                    if i - 1 >= min_i:
+                        i -= 1
+                    else:
+                        i = min_i
+                    continue
+
+
             with open("{}/{}_{}.in".format(fuzzer_input, self.file_name, i), 'w') as f:
                 f.write(self.fuzzer.source)
             with open("{}/{}_{}.xml".format(fuzzer_debug, self.file_name, i), 'w') as f:
@@ -114,11 +147,19 @@ class Fuzzer():
             #     f.write(self.fuzzer.source)
             # with open("fuzzer/outputs/{}.out".format(i), 'w') as f:
             #     f.write(self.fuzzer.out)
+            print("test {}/{} generated".format(i, self.batch))
             i += 1
             min_i = i
 
 
+def handler(signum, frame):
+    print("Execution Timeout")
+    raise TimeoutError
+
+
 if __name__ == '__main__':
+
+
     parser = argparse.ArgumentParser(
         description='Procedurally generate a test case for Gazprea'
     )