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https://github.com/angr/angr
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Fish
e13adc02cd
* Function.prototype: Automatically set arg names when missing. * Support setting None to Function.prototype.
136 lines
4.6 KiB
Python
Executable File
136 lines
4.6 KiB
Python
Executable File
#!/usr/bin/env python3
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from __future__ import annotations
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from unittest import main, TestCase
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import networkx
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import archinfo
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from angr.knowledge_plugins.functions import Function
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from angr.sim_type import parse_defns
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def makeFunction(function_manager, function_address, function_name):
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# Fill some value that are not relevant for the tests, but help circumvent a lot of mocking.
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f = Function(
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function_manager,
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function_address,
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name=function_name,
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syscall=False,
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is_simprocedure=False,
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is_plt=False,
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binary_name="rpaulson.bin",
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returning=True,
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)
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function_manager._function_map[function_address] = f
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return f
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class MockFunctionManager:
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def __init__(self):
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self.callgraph = networkx.MultiDiGraph()
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self._function_map = {}
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def function(self, address):
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return self._function_map[address]
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def noop(self, *args, **kwargs):
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pass
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def contains_addr(self, addr):
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return addr in self._function_map
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def get_by_addr(self, addr):
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return self._function_map[addr]
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set_function_returning = noop
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class TestFunction(TestCase):
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def setUp(self):
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self.function_manager = MockFunctionManager()
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def test_functions_called_returns_all_functions_that_can_be_reached_from_the_function(self):
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A = makeFunction(self.function_manager, 0x40, "A")
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B = makeFunction(self.function_manager, 0x41, "B")
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function = makeFunction(self.function_manager, 0x42, "function")
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C = makeFunction(self.function_manager, 0x43, "C")
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D = makeFunction(self.function_manager, 0x44, "D")
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E = makeFunction(self.function_manager, 0x45, "E")
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# A -> B
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# function -> C -> D
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# function -> E
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self.function_manager.callgraph.add_edges_from(
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[
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(A.addr, B.addr),
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(function.addr, C.addr),
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(function.addr, E.addr),
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(C.addr, D.addr),
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]
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)
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self.assertEqual(function.functions_reachable(), {C, D, E})
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def test_functions_called_with_recursive_function(self):
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recursive_function = makeFunction(self.function_manager, 0x40, "recursive_function")
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B = makeFunction(self.function_manager, 0x41, "B")
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# recursive_function -> B
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# recursive_function -> recursive_function
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self.function_manager.callgraph.add_edges_from(
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[
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(recursive_function.addr, B.addr),
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(recursive_function.addr, recursive_function.addr),
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]
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)
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self.assertEqual(recursive_function.functions_reachable(), {recursive_function, B})
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def test_functions_called_with_cyclic_dependencies(self):
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function = makeFunction(self.function_manager, 0x42, "function")
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C = makeFunction(self.function_manager, 0x43, "C")
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# function -> C -> function
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self.function_manager.callgraph.add_edges_from(
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[
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(function.addr, C.addr),
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(C.addr, function.addr),
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]
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)
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self.assertEqual(function.functions_reachable(), {function, C})
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def test_function_set_prototype_without_parameter_names(self):
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function = makeFunction(self.function_manager, 0x42, "function")
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parsed_proto = parse_defns("int func(int, char*);")["func"]
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function.prototype = parsed_proto.with_arch(archinfo.arch_from_id("AMD64"))
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assert len(function.prototype.args) == 2
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assert len(function.prototype.arg_names) == 2
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# default function argument names apply
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assert function.prototype.arg_names[0] == "a0"
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assert function.prototype.arg_names[1] == "a1"
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def test_function_set_prototype_missing_a_parameter_name(self):
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function = makeFunction(self.function_manager, 0x42, "function")
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parsed_proto = parse_defns("int func(int, char*);")["func"]
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parsed_proto.arg_names = ["", "a3"]
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function.prototype = parsed_proto.with_arch(archinfo.arch_from_id("AMD64"))
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assert len(function.prototype.args) == 2
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assert len(function.prototype.arg_names) == 2
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# default function argument names apply
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assert function.prototype.arg_names[0] == "a0"
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# the original argument name should be kept
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assert function.prototype.arg_names[1] == "a3"
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def test_function_set_prototype_none(self):
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# you can set Function.prototype to None to clear it
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function = makeFunction(self.function_manager, 0x42, "function")
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function.prototype = None
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assert function.prototype is None
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if __name__ == "__main__":
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main()
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