delete the deprecated isBarrierGuard predicate from the shared dataflow library, and its uses

Author: erik-krogh

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl1.qll

@@ -91,21 +91,6 @@ abstract class Configuration extends string {
   /** Holds if data flow out of `node` is prohibited. */
   predicate isBarrierOut(Node node) { none() }
 
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard) { none() }
-
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited when
-   * the flow state is `state`
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard, FlowState state) { none() }
-
   /**
    * Holds if data may flow from `node1` to `node2` in addition to the normal data-flow steps.
    */
@@ -225,29 +210,6 @@ abstract private class ConfigurationRecursionPrevention extends Configuration {
   }
 }
 
-/** A bridge class to access the deprecated `isBarrierGuard`. */
-private class BarrierGuardGuardedNodeBridge extends Unit {
-  abstract predicate guardedNode(Node n, Configuration config);
-
-  abstract predicate guardedNode(Node n, FlowState state, Configuration config);
-}
-
-private class BarrierGuardGuardedNode extends BarrierGuardGuardedNodeBridge {
-  deprecated override predicate guardedNode(Node n, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g) and
-      n = g.getAGuardedNode()
-    )
-  }
-
-  deprecated override predicate guardedNode(Node n, FlowState state, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g, state) and
-      n = g.getAGuardedNode()
-    )
-  }
-}
-
 private FlowState relevantState(Configuration config) {
   config.isSource(_, result) or
   config.isSink(_, result) or
@@ -288,9 +250,7 @@ private module Config implements FullStateConfigSig {
 
   predicate isBarrier(Node node, FlowState state) {
     getConfig(state).isBarrier(node, getState(state)) or
-    getConfig(state).isBarrier(node) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getState(state), getConfig(state)) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getConfig(state))
+    getConfig(state).isBarrier(node)
   }
 
   predicate isBarrierIn(Node node) { any(Configuration config).isBarrierIn(node) }

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll

@@ -91,21 +91,6 @@ abstract class Configuration extends string {
   /** Holds if data flow out of `node` is prohibited. */
   predicate isBarrierOut(Node node) { none() }
 
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard) { none() }
-
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited when
-   * the flow state is `state`
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard, FlowState state) { none() }
-
   /**
    * Holds if data may flow from `node1` to `node2` in addition to the normal data-flow steps.
    */
@@ -225,29 +210,6 @@ abstract private class ConfigurationRecursionPrevention extends Configuration {
   }
 }
 
-/** A bridge class to access the deprecated `isBarrierGuard`. */
-private class BarrierGuardGuardedNodeBridge extends Unit {
-  abstract predicate guardedNode(Node n, Configuration config);
-
-  abstract predicate guardedNode(Node n, FlowState state, Configuration config);
-}
-
-private class BarrierGuardGuardedNode extends BarrierGuardGuardedNodeBridge {
-  deprecated override predicate guardedNode(Node n, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g) and
-      n = g.getAGuardedNode()
-    )
-  }
-
-  deprecated override predicate guardedNode(Node n, FlowState state, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g, state) and
-      n = g.getAGuardedNode()
-    )
-  }
-}
-
 private FlowState relevantState(Configuration config) {
   config.isSource(_, result) or
   config.isSink(_, result) or
@@ -288,9 +250,7 @@ private module Config implements FullStateConfigSig {
 
   predicate isBarrier(Node node, FlowState state) {
     getConfig(state).isBarrier(node, getState(state)) or
-    getConfig(state).isBarrier(node) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getState(state), getConfig(state)) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getConfig(state))
+    getConfig(state).isBarrier(node)
   }
 
   predicate isBarrierIn(Node node) { any(Configuration config).isBarrierIn(node) }

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll

@@ -91,21 +91,6 @@ abstract class Configuration extends string {
   /** Holds if data flow out of `node` is prohibited. */
   predicate isBarrierOut(Node node) { none() }
 
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard) { none() }
-
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited when
-   * the flow state is `state`
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard, FlowState state) { none() }
-
   /**
    * Holds if data may flow from `node1` to `node2` in addition to the normal data-flow steps.
    */
@@ -225,29 +210,6 @@ abstract private class ConfigurationRecursionPrevention extends Configuration {
   }
 }
 
-/** A bridge class to access the deprecated `isBarrierGuard`. */
-private class BarrierGuardGuardedNodeBridge extends Unit {
-  abstract predicate guardedNode(Node n, Configuration config);
-
-  abstract predicate guardedNode(Node n, FlowState state, Configuration config);
-}
-
-private class BarrierGuardGuardedNode extends BarrierGuardGuardedNodeBridge {
-  deprecated override predicate guardedNode(Node n, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g) and
-      n = g.getAGuardedNode()
-    )
-  }
-
-  deprecated override predicate guardedNode(Node n, FlowState state, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g, state) and
-      n = g.getAGuardedNode()
-    )
-  }
-}
-
 private FlowState relevantState(Configuration config) {
   config.isSource(_, result) or
   config.isSink(_, result) or
@@ -288,9 +250,7 @@ private module Config implements FullStateConfigSig {
 
   predicate isBarrier(Node node, FlowState state) {
     getConfig(state).isBarrier(node, getState(state)) or
-    getConfig(state).isBarrier(node) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getState(state), getConfig(state)) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getConfig(state))
+    getConfig(state).isBarrier(node)
   }
 
   predicate isBarrierIn(Node node) { any(Configuration config).isBarrierIn(node) }

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll

@@ -91,21 +91,6 @@ abstract class Configuration extends string {
   /** Holds if data flow out of `node` is prohibited. */
   predicate isBarrierOut(Node node) { none() }
 
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard) { none() }
-
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited when
-   * the flow state is `state`
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard, FlowState state) { none() }
-
   /**
    * Holds if data may flow from `node1` to `node2` in addition to the normal data-flow steps.
    */
@@ -225,29 +210,6 @@ abstract private class ConfigurationRecursionPrevention extends Configuration {
   }
 }
 
-/** A bridge class to access the deprecated `isBarrierGuard`. */
-private class BarrierGuardGuardedNodeBridge extends Unit {
-  abstract predicate guardedNode(Node n, Configuration config);
-
-  abstract predicate guardedNode(Node n, FlowState state, Configuration config);
-}
-
-private class BarrierGuardGuardedNode extends BarrierGuardGuardedNodeBridge {
-  deprecated override predicate guardedNode(Node n, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g) and
-      n = g.getAGuardedNode()
-    )
-  }
-
-  deprecated override predicate guardedNode(Node n, FlowState state, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g, state) and
-      n = g.getAGuardedNode()
-    )
-  }
-}
-
 private FlowState relevantState(Configuration config) {
   config.isSource(_, result) or
   config.isSink(_, result) or
@@ -288,9 +250,7 @@ private module Config implements FullStateConfigSig {
 
   predicate isBarrier(Node node, FlowState state) {
     getConfig(state).isBarrier(node, getState(state)) or
-    getConfig(state).isBarrier(node) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getState(state), getConfig(state)) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getConfig(state))
+    getConfig(state).isBarrier(node)
   }
 
   predicate isBarrierIn(Node node) { any(Configuration config).isBarrierIn(node) }

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll

@@ -91,21 +91,6 @@ abstract class Configuration extends string {
   /** Holds if data flow out of `node` is prohibited. */
   predicate isBarrierOut(Node node) { none() }
 
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard) { none() }
-
-  /**
-   * DEPRECATED: Use `isBarrier` and `BarrierGuard` module instead.
-   *
-   * Holds if data flow through nodes guarded by `guard` is prohibited when
-   * the flow state is `state`
-   */
-  deprecated predicate isBarrierGuard(BarrierGuard guard, FlowState state) { none() }
-
   /**
    * Holds if data may flow from `node1` to `node2` in addition to the normal data-flow steps.
    */
@@ -225,29 +210,6 @@ abstract private class ConfigurationRecursionPrevention extends Configuration {
   }
 }
 
-/** A bridge class to access the deprecated `isBarrierGuard`. */
-private class BarrierGuardGuardedNodeBridge extends Unit {
-  abstract predicate guardedNode(Node n, Configuration config);
-
-  abstract predicate guardedNode(Node n, FlowState state, Configuration config);
-}
-
-private class BarrierGuardGuardedNode extends BarrierGuardGuardedNodeBridge {
-  deprecated override predicate guardedNode(Node n, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g) and
-      n = g.getAGuardedNode()
-    )
-  }
-
-  deprecated override predicate guardedNode(Node n, FlowState state, Configuration config) {
-    exists(BarrierGuard g |
-      config.isBarrierGuard(g, state) and
-      n = g.getAGuardedNode()
-    )
-  }
-}
-
 private FlowState relevantState(Configuration config) {
   config.isSource(_, result) or
   config.isSink(_, result) or
@@ -288,9 +250,7 @@ private module Config implements FullStateConfigSig {
 
   predicate isBarrier(Node node, FlowState state) {
     getConfig(state).isBarrier(node, getState(state)) or
-    getConfig(state).isBarrier(node) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getState(state), getConfig(state)) or
-    any(BarrierGuardGuardedNodeBridge b).guardedNode(node, getConfig(state))
+    getConfig(state).isBarrier(node)
   }
 
   predicate isBarrierIn(Node node) { any(Configuration config).isBarrierIn(node) }

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowUtil.qll

@@ -874,28 +874,3 @@ module BarrierGuard<guardChecksSig/3 guardChecks> {
     )
   }
 }
-
-/**
- * DEPRECATED: Use `BarrierGuard` module instead.
- *
- * A guard that validates some expression.
- *
- * To use this in a configuration, extend the class and provide a
- * characteristic predicate precisely specifying the guard, and override
- * `checks` to specify what is being validated and in which branch.
- *
- * It is important that all extending classes in scope are disjoint.
- */
-deprecated class BarrierGuard extends GuardCondition {
-  /** Override this predicate to hold if this guard validates `e` upon evaluating to `b`. */
-  abstract predicate checks(Expr e, boolean b);
-
-  /** Gets a node guarded by this guard. */
-  final ExprNode getAGuardedNode() {
-    exists(SsaDefinition def, Variable v, boolean branch |
-      result.getExpr() = def.getAUse(v) and
-      this.checks(def.getAUse(v), branch) and
-      this.controls(result.getExpr().getBasicBlock(), branch)
-    )
-  }
-}

cpp/ql/lib/semmle/code/cpp/dataflow/internal/tainttracking1/TaintTrackingImpl.qll

@@ -116,33 +116,6 @@ abstract class Configuration extends DataFlow::Configuration {
 
   final override predicate isBarrierOut(DataFlow::Node node) { this.isSanitizerOut(node) }
 
-  /**
-   * DEPRECATED: Use `isSanitizer` and `BarrierGuard` module instead.
-   *
-   * Holds if taint propagation through nodes guarded by `guard` is prohibited.
-   */
-  deprecated predicate isSanitizerGuard(DataFlow::BarrierGuard guard) { none() }
-
-  deprecated final override predicate isBarrierGuard(DataFlow::BarrierGuard guard) {
-    this.isSanitizerGuard(guard)
-  }
-
-  /**
-   * DEPRECATED: Use `isSanitizer` and `BarrierGuard` module instead.
-   *
-   * Holds if taint propagation through nodes guarded by `guard` is prohibited
-   * when the flow state is `state`.
-   */
-  deprecated predicate isSanitizerGuard(DataFlow::BarrierGuard guard, DataFlow::FlowState state) {
-    none()
-  }
-
-  deprecated final override predicate isBarrierGuard(
-    DataFlow::BarrierGuard guard, DataFlow::FlowState state
-  ) {
-    this.isSanitizerGuard(guard, state)
-  }
-
   /**
    * Holds if taint may propagate from `node1` to `node2` in addition to the normal data-flow and taint steps.
    */