Dataflow: Add support for C#/Python/Ruby/Swift.

Author: aschackmull

csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll

@@ -1581,6 +1581,8 @@ predicate jumpStep(Node pred, Node succ) {
     jrk.getTarget() = call.getATarget(_) and
     succ = getAnOutNode(call, jrk.getTargetReturnKind())
   )
+  or
+  FlowSummaryImpl::Private::Steps::summaryJumpStep(pred, succ)
 }
 
 private class StoreStepConfiguration extends ControlFlowReachabilityConfiguration {

csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImplSpecific.qll

@@ -91,6 +91,12 @@ DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) {
   )
 }
 
+/** Gets the type of synthetic global `sg`. */
+DataFlowType getSyntheticGlobalType(SummaryComponent::SyntheticGlobal sg) {
+  exists(sg) and
+  result = Gvn::getGlobalValueNumber(any(ObjectType t))
+}
+
 bindingset[provenance]
 private boolean isGenerated(string provenance) {
   provenance = "generated" and result = true

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowPrivate.qll

@@ -453,6 +453,8 @@ predicate jumpStep(Node nodeFrom, Node nodeTo) {
   jumpStepSharedWithTypeTracker(nodeFrom, nodeTo)
   or
   jumpStepNotSharedWithTypeTracker(nodeFrom, nodeTo)
+  or
+  FlowSummaryImpl::Private::Steps::summaryJumpStep(nodeFrom, nodeTo)
 }
 
 /**

python/ql/lib/semmle/python/dataflow/new/internal/FlowSummaryImplSpecific.qll

@@ -73,6 +73,9 @@ DataFlowType getCallbackParameterType(DataFlowType t, int i) { any() }
  */
 DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) { any() }
 
+/** Gets the type of synthetic global `sg`. */
+DataFlowType getSyntheticGlobalType(SummaryComponent::SyntheticGlobal sg) { any() }
+
 /**
  * Holds if an external flow summary exists for `c` with input specification
  * `input`, output specification `output`, kind `kind`, and a flag `generated`

ruby/ql/lib/codeql/ruby/dataflow/internal/DataFlowPrivate.qll

@@ -1003,6 +1003,8 @@ predicate jumpStep(Node pred, Node succ) {
     succ.(SsaDefinitionNode).getDefinition())
   or
   succ.asExpr().getExpr().(ConstantReadAccess).getValue() = pred.asExpr().getExpr()
+  or
+  FlowSummaryImpl::Private::Steps::summaryJumpStep(pred, succ)
 }
 
 private ContentSet getKeywordContent(string name) {

ruby/ql/lib/codeql/ruby/dataflow/internal/FlowSummaryImplSpecific.qll

@@ -44,6 +44,9 @@ DataFlowType getCallbackParameterType(DataFlowType t, ArgumentPosition pos) { an
  */
 DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) { any() }
 
+/** Gets the type of synthetic global `sg`. */
+DataFlowType getSyntheticGlobalType(SummaryComponent::SyntheticGlobal sg) { any() }
+
 /**
  * Holds if an external flow summary exists for `c` with input specification
  * `input`, output specification `output`, kind `kind`, and a flag `generated`

swift/ql/lib/codeql/swift/dataflow/internal/DataFlowPrivate.qll

@@ -486,7 +486,9 @@ private module OutNodes {
 
 import OutNodes
 
-predicate jumpStep(Node pred, Node succ) { none() }
+predicate jumpStep(Node pred, Node succ) {
+  FlowSummaryImpl::Private::Steps::summaryJumpStep(pred, succ)
+}
 
 predicate storeStep(Node node1, ContentSet c, Node node2) {
   exists(MemberRefExpr ref, AssignExpr assign |

swift/ql/lib/codeql/swift/dataflow/internal/FlowSummaryImplSpecific.qll

@@ -51,6 +51,9 @@ DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) {
   any() // TODO once we have type pruning
 }
 
+/** Gets the type of synthetic global `sg`. */
+DataFlowType getSyntheticGlobalType(SummaryComponent::SyntheticGlobal sg) { any() }
+
 /**
  * Holds if an external flow summary exists for `c` with input specification
  * `input`, output specification `output`, kind `kind`, and a flag `generated`