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d1755500e4
Initial implementation of data flow through fields, using the algorithm of the
shared data flow implementation. Fields (and field-like properties) are covered,
and stores can be either
- ordinary assignments, `Foo = x`,
- object initializers, `new C() { Foo = x }`, or
- field initializers, `int Foo = x`.
For field initializers, we need to synthesize calls (`SynthesizedCall`),
callables (`SynthesizedCallable`), parameters (`InstanceParameterNode`), and
arguments (`SynthesizedThisArgumentNode`), as the C# extractor does not (yet)
extract such entities. For example, in
```
class C
{
int Field1 = 1;
int Field2 = 2;
C() { }
}
```
there is a synthesized call from the constructor `C`, with a synthesized `this`
argument, and the targets of that call are two synthesized callables with bodies
`this.Field1 = 1` and `this.Field2 = 2`, respectively.
A consequence of this is that `DataFlowCallable` is no longer an alias for
`DotNet::Callable`, but instead an IPA type.
24 lines
585 B
Plaintext
24 lines
585 B
Plaintext
/**
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* @kind path-problem
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*/
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import csharp
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import DataFlow::PathGraph
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class Conf extends DataFlow::Configuration {
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Conf() { this = "FieldFlowConf" }
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override predicate isSource(DataFlow::Node src) { src.asExpr() instanceof ObjectCreation }
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override predicate isSink(DataFlow::Node sink) {
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exists(MethodCall mc |
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mc.getTarget().hasName("Sink") and
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mc.getAnArgument() = sink.asExpr()
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)
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}
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}
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from DataFlow::PathNode source, DataFlow::PathNode sink, Conf conf
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where conf.hasFlowPath(source, sink)
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select sink, source, sink, "$@", source, source.toString()
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