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11c71fdd18
This commit removes SSA nodes from the data flow graph. Specifically, for a definition and use such as ```python x = expr y = x + 2 ``` we used to have flow from `expr` to an SSA variable representing x and from that SSA variable to the use of `x` in the definition of `y`. Now we instead have flow from `expr` to the control flow node for `x` at line 1 and from there to the control flow node for `x` at line 2. Specific changes: - `EssaNode` from the data flow layer no longer exists. - Several glue steps between `EssaNode`s and `CfgNode`s have been deleted. - Entry nodes are now admitted as `CfgNodes` in the data flow layer (they were filtered out before). - Entry nodes now have a new `toString` taking into account that the module name may be ambigous. - Some tests have been rewritten to accomodate the changes, but only `python/ql/test/experimental/dataflow/basic/maximalFlowsConfig.qll` should have semantic changes. - Comments have been updated - Test output has been updated, but apart from `python/ql/test/experimental/dataflow/basic/maximalFlows.expected` only `python/ql/test/experimental/dataflow/typetracking-summaries/summaries.py` should have a semantic change. This is a bonus fix, probably meaning that something was never connected up correctly.
73 lines
1.6 KiB
Python
73 lines
1.6 KiB
Python
# Python 3 specific tests, like the one in coverage/classes.py
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#
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# User-defined methods, both instance methods and class methods, can be called in many non-standard ways
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# i.e. differently from simply `c.f()` or `C.f()`. For example, a user-defined `__await__` method on a
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# class `C` will be called by the syntactic construct `await c` when `c` is an instance of `C`.
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#
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# These tests should cover all the class calls that we hope to support.
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# It is based on https://docs.python.org/3/reference/datamodel.html, and headings refer there.
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#
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# All functions starting with "test_" should run and execute `print("OK")` exactly once.
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# This can be checked by running validTest.py.
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import sys
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import os
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sys.path.append(os.path.dirname(os.path.dirname((__file__))))
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from testlib import expects
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def SINK1(x):
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pass
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def SINK2(x):
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pass
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def SINK3(x):
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pass
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def SINK4(x):
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pass
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def OK():
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print("OK")
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# 3.3.7. Emulating container types
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# object.__length_hint__(self)
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class With_length_hint:
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def __length_hint__(self):
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SINK1(self)
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OK()
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return 0
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def test_length_hint():
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import operator
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with_length_hint = With_length_hint() #$ arg1="with_length_hint" func=With_length_hint.__length_hint__
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operator.length_hint(with_length_hint)
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# 3.3.8. Emulating numeric types
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# object.__index__(self)
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class With_index:
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def __index__(self):
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SINK1(self)
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OK() # Call not found
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return 0
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def test_index():
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import operator
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with_index = With_index() #$ arg1="with_index" func=With_index.__index__
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operator.index(with_index)
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