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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`.
98 lines
2.1 KiB
Python
98 lines
2.1 KiB
Python
# Here we test the case where a captured variable is being read.
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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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# Capture the parameter of an outer function.
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def inParam(tainted):
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def captureIn1():
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sinkI1 = tainted
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SINK(sinkI1) #$ captured
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captureIn1()
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def captureIn2():
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def m():
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sinkI2 = tainted
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SINK(sinkI2) #$ captured
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m()
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captureIn2()
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captureIn3 = lambda arg: SINK(tainted) #$ captured
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captureIn3("")
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def captureIn1NotCalled():
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nonSink1 = tainted
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SINK_F(nonSink1)
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def captureIn2NotCalled():
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# notice that `m` is not called
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def m():
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nonSink1 = tainted
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SINK_F(nonSink1)
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captureIn2NotCalled()
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@expects(3)
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def test_inParam():
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inParam(SOURCE)
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# Capture the local variable of an outer function.
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def inLocal():
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tainted = SOURCE
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def captureIn1():
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sinkI1 = tainted
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SINK(sinkI1) #$ captured
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captureIn1()
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def captureIn2():
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def m():
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sinkI2 = tainted
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SINK(sinkI2) #$ captured
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m()
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captureIn2()
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captureIn3 = lambda arg: SINK(tainted) #$ captured
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captureIn3("")
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def captureIn1NotCalled():
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nonSink1 = tainted
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SINK_F(nonSink1)
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def captureIn2NotCalled():
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# notice that `m` is not called
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def m():
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nonSink2 = tainted
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SINK_F(nonSink2)
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captureIn2NotCalled()
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@expects(3)
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def test_inLocal():
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inLocal()
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