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2c5dd2dfa3
This PR separates the core cpp packs into `codeql/cpp-queries` and `codeql/cpp-all`. There are very few lines of code changed. Almost all changes are moving files around.
40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
/**
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* DEPRECATED: Recursion through `DataFlow::Configuration` is impossible in
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* any supported tooling. There is no need for this module because it's
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* impossible to accidentally depend on recursion through
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* `DataFlow::Configuration` in current releases.
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*
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* When this module is imported, recursive use of `DataFlow::Configuration` is
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* disallowed. Importing this module will guarantee the absence of such
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* recursion, which is unsupported and will be unconditionally disallowed in a
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* future release.
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*
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* Recursive use of `DataFlow{2..4}::Configuration` is always disallowed, so no
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* import is needed for those.
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*/
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import cpp
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private import semmle.code.cpp.dataflow.DataFlow
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/**
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* This class exists to prevent mutual recursion between the user-overridden
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* member predicates of `Configuration` and the rest of the data-flow library.
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* Good performance cannot be guaranteed in the presence of such recursion, so
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* it should be replaced by using more than one copy of the data flow library.
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* Four copies are available: `DataFlow` through `DataFlow4`.
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*/
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abstract private class ConfigurationRecursionPrevention extends DataFlow::Configuration {
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bindingset[this]
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ConfigurationRecursionPrevention() { any() }
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override predicate hasFlow(DataFlow::Node source, DataFlow::Node sink) {
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strictcount(DataFlow::Node n | this.isSource(n)) < 0
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or
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strictcount(DataFlow::Node n | this.isSink(n)) < 0
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or
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strictcount(DataFlow::Node n1, DataFlow::Node n2 | this.isAdditionalFlowStep(n1, n2)) < 0
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or
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super.hasFlow(source, sink)
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}
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}
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