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c054ba6a97
This provides variable capture in standard situations: - nested functions - lambdas There are some deficiencies: - we do not yet handle objects capturing variables. - we do not handle variables captured via the `nonlocal` keyword. This should be solved at the AST level, though, and then it should "just work". There are still inconsistencies in the case where a `SynthesizedCaptureNode` has a comprehensions as its enclosing callable. In this case, `TFunction(cn.getEnclosingCallable())` is not defined and so getEnclosingCallable does not exist for the `CaptureNode`.
96 lines
2.1 KiB
Python
96 lines
2.1 KiB
Python
# Here we test writing to a captured variable via a dictionary (see `out`).
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# We also test reading one captured variable and writing the value to another (see `through`).
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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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# These are defined so that we can evaluate the test code.
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NONSOURCE = "not a source"
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SOURCE = "source"
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def is_source(x):
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return x == "source" or x == b"source" or x == 42 or x == 42.0 or x == 42j
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def SINK(x):
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if is_source(x):
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print("OK")
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else:
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print("Unexpected flow", x)
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def SINK_F(x):
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if is_source(x):
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print("Unexpected flow", x)
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else:
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print("OK")
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def out():
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sinkO1 = { "x": "" }
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def captureOut1():
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sinkO1["x"] = SOURCE
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captureOut1()
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SINK(sinkO1["x"]) #$ captured
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sinkO2 = { "x": "" }
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def captureOut2():
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def m():
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sinkO2["x"] = SOURCE
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m()
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captureOut2()
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SINK(sinkO2["x"]) #$ captured
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nonSink0 = { "x": "" }
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def captureOut1NotCalled():
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nonSink0["x"] = SOURCE
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SINK_F(nonSink0["x"])
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def captureOut2NotCalled():
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def m():
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nonSink0["x"] = SOURCE
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captureOut2NotCalled()
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SINK_F(nonSink0["x"])
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@expects(4)
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def test_out():
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out()
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def through(tainted):
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sinkO1 = { "x": "" }
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def captureOut1():
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sinkO1["x"] = tainted
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captureOut1()
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SINK(sinkO1["x"]) #$ captured
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sinkO2 = { "x": "" }
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def captureOut2():
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def m():
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sinkO2["x"] = tainted
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m()
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captureOut2()
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SINK(sinkO2["x"]) #$ captured
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nonSink1 = { "x": "" }
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def captureOut1NotCalled():
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nonSink1["x"] = tainted
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SINK_F(nonSink1["x"])
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nonSink2 = { "x": "" }
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def captureOut2NotCalled():
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# notice that `m` is not called
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def m():
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nonSink2["x"] = tainted
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captureOut2NotCalled()
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SINK_F(nonSink2["x"])
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@expects(4)
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def test_through():
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through(SOURCE)
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