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C++: Add tests for global-var support

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This commit is contained in:
Jonas Jensen
2020-02-04 20:22:38 +01:00
parent f40acc19d2
commit a0e2d59c01
10 changed files with 93 additions and 0 deletions
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18
cpp/ql/test/library-tests/dataflow/dataflow-tests/IRDataflowTestCommon.qll
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@@ -36,9 +36,27 @@ class TestAllocationConfig extends DataFlow::Configuration {
)
}
override predicate isAdditionalFlowStep(DataFlow::Node n1, DataFlow::Node n2) {
exists(GlobalOrNamespaceVariable var | var.getName().matches("flowTestGlobal%") |
writesVariable(n1.asInstruction(), var) and
var = n2.asVariable()
or
readsVariable(n2.asInstruction(), var) and
var = n1.asVariable()
)
}
override predicate isBarrier(DataFlow::Node barrier) {
barrier.asExpr().(VariableAccess).getTarget().hasName("barrier")
}
override predicate isBarrierGuard(DataFlow::BarrierGuard bg) { bg instanceof TestBarrierGuard }
}
private predicate readsVariable(LoadInstruction load, Variable var) {
load.getSourceAddress().(VariableAddressInstruction).getASTVariable() = var
}
private predicate writesVariable(StoreInstruction store, Variable var) {
store.getDestinationAddress().(VariableAddressInstruction).getASTVariable() = var
}