220 lines
6.7 KiB
Python
220 lines
6.7 KiB
Python
from typing import Optional
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import os.path
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import tqdm
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from frozendict import frozendict
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import ast
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import astunparse
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import sys
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import random
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from operators import compute_distances
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# hyperparameters
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ROOT_DIR: str = os.path.dirname(__file__)
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IN_DIR: str = os.path.join(ROOT_DIR, 'benchmark')
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OUT_DIR: str = os.path.join(ROOT_DIR, 'instrumented')
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SUFFIX: str = "_instrumented"
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distances_true: dict[int, int] = {}
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distances_false: dict[int, int] = {}
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# Archive of solutions
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archive_true_branches: dict[int, any] = {}
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archive_false_branches: dict[int, any] = {}
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class BranchTransformer(ast.NodeTransformer):
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branches_range: dict[str, tuple[int, int]]
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branch_num: int
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instrumented_name: Optional[str]
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in_assert: bool
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in_return: bool
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def __init__(self):
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self.branch_num = 0
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self.instrumented_name = None
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self.in_assert = False
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self.in_return = False
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self.branches_range = {}
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@staticmethod
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def to_instrumented_name(name: str):
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return name + SUFFIX
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@staticmethod
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def to_original_name(name: str):
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assert name.endswith(SUFFIX)
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return name[:len(name) - len(SUFFIX)]
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def visit_Assert(self, ast_node):
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self.in_assert = True
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self.generic_visit(ast_node)
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self.in_assert = False
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return ast_node
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def visit_Return(self, ast_node):
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self.in_return = True
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self.generic_visit(ast_node)
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self.in_return = False
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return ast_node
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def visit_FunctionDef(self, ast_node):
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self.instrumented_name = ast_node.name
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b_start = self.branch_num
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ast_node.name = BranchTransformer.to_instrumented_name(ast_node.name)
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inner_node = self.generic_visit(ast_node)
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self.branches_range[ast_node.name] = (b_start, self.branch_num)
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self.instrumented_name = None
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return inner_node
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def visit_Call(self, ast_node):
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if isinstance(ast_node.func, ast.Name) and ast_node.func.id == self.instrumented_name:
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ast_node.func.id = BranchTransformer.to_instrumented_name(ast_node.func.id)
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return ast_node
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def visit_Compare(self, ast_node):
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if ast_node.ops[0] in [ast.Is, ast.IsNot, ast.In, ast.NotIn] or self.in_assert or self.in_return:
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return self.generic_visit(ast_node)
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self.branch_num += 1
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return ast.Call(func=ast.Name("evaluate_condition", ast.Load()),
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args=[ast.Num(self.branch_num),
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ast.Str(ast_node.ops[0].__class__.__name__),
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ast_node.left,
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ast_node.comparators[0]],
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keywords=[],
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starargs=None,
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kwargs=None)
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def update_maps(condition_num, d_true, d_false):
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global distances_true, distances_false
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if condition_num in distances_true.keys():
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distances_true[condition_num] = min(distances_true[condition_num], d_true)
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else:
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distances_true[condition_num] = d_true
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if condition_num in distances_false.keys():
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distances_false[condition_num] = min(distances_false[condition_num], d_false)
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else:
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distances_false[condition_num] = d_false
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def evaluate_condition(num, op, lhs, rhs): # type: ignore
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if op == "In":
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if isinstance(lhs, str):
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lhs = ord(lhs)
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minimum = sys.maxsize
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for elem in rhs.keys():
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distance = abs(lhs - ord(elem))
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if distance < minimum:
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minimum = distance
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distance_true, distance_false = minimum, 1 if minimum == 0 else 0
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else:
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distance_true, distance_false = compute_distances(op, lhs, rhs)
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update_maps(num, distance_true, distance_false)
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# distance == 0 equivalent to actual test by construction
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return distance_true == 0
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ArgType = str
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Arg = tuple[str, ArgType]
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Params = frozendict[str, any]
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SignatureDict = dict[str, list[Arg]]
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n_of_branches: dict[str, tuple[int, int]] = {}
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functions: SignatureDict = {}
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module_of: dict[str, str] = {}
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def instrument(source_path: str, target_path: str, save_instrumented=True):
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global functions, n_of_branches
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with open(source_path, "r") as f:
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source = f.read()
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node = ast.parse(source)
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# print(ast.dump(node, indent=2))
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b = BranchTransformer()
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b.visit(node)
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for f_name, limits in b.branches_range.items():
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n_of_branches[f_name] = limits
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node = ast.fix_missing_locations(node) # Make sure the line numbers are ok before printing
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if save_instrumented:
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with open(target_path, "w") as f:
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print(astunparse.unparse(node), file=f)
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current_module = sys.modules[__name__]
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code = compile(node, filename="<ast>", mode="exec")
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exec(code, current_module.__dict__)
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# Figure out the top level function definitions
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assert isinstance(node, ast.Module)
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top_level_f_ast: list[ast.FunctionDef] = [f for f in node.body if isinstance(f, ast.FunctionDef)]
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for f in top_level_f_ast:
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if f.name in functions:
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raise ValueError(f"Function '{f.name}' already loaded from another file")
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arg_types: list[Arg] = []
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for arg in f.args.args:
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# fetch annotation type if found else fetch none
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# noinspection PyUnresolvedReferences
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arg_type = None if arg.annotation is None else arg.annotation.id
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arg_types.append((arg.arg, arg_type))
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functions[f.name] = arg_types
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module_of[f.name] = os.path.normpath(os.path.relpath(source_path, ROOT_DIR)) \
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.replace(".py", "") \
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.replace("/", ".")
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def invoke(f_name: str, f_args: Params) -> any:
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global functions
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current_module = sys.modules[__name__]
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if f_name not in functions:
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raise ValueError(f"Function '{f_name}' not loaded")
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f_args_signature = functions[f_name]
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for arg_name, arg_type in f_args_signature:
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if arg_name not in f_args:
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raise ValueError(f"Required argument '{arg_name}' not provided")
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return getattr(current_module, f_name)(**f_args)
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def find_py_files(search_dir: str):
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for (cwd, dirs, files) in os.walk(search_dir):
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for file in files:
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if file.endswith(".py"):
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yield os.path.join(cwd, file)
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def load_benchmark(save_instrumented=True):
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for file in tqdm.tqdm(find_py_files(IN_DIR), desc="Instrumenting"):
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instrument(file, os.path.join(OUT_DIR, os.path.basename(file)), save_instrumented=save_instrumented)
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def call_statement(f_name: str, f_args: Params) -> str:
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arg_list: list[str] = []
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for k, v in f_args.items():
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arg_list.append(f"{k}={repr(v)}") # quote strings
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return f"{f_name}({', '.join(arg_list)})"
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if __name__ == '__main__':
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load_benchmark(save_instrumented=True)
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