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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.
6 lines
515 B
Plaintext
6 lines
515 B
Plaintext
| test.py:3:1:3:7 | ControlFlowNode for tainted | test.py:4:6:4:12 | ControlFlowNode for tainted |
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| test.py:3:11:3:16 | ControlFlowNode for SOURCE | test.py:3:1:3:7 | ControlFlowNode for tainted |
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| test.py:6:1:6:11 | ControlFlowNode for FunctionExpr | test.py:6:5:6:8 | ControlFlowNode for func |
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| test.py:7:5:7:16 | ControlFlowNode for also_tainted | test.py:8:10:8:21 | ControlFlowNode for also_tainted |
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| test.py:7:20:7:25 | ControlFlowNode for SOURCE | test.py:7:5:7:16 | ControlFlowNode for also_tainted |
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