docs: update supported Swift version

Release preparation for version 2.15.4

CODEOWNERS

@@ -8,6 +8,8 @@
 /swift/ @github/codeql-swift
 /misc/codegen/ @github/codeql-swift
 /java/kotlin-extractor/ @github/codeql-kotlin
+/java/ql/test-kotlin1/ @github/codeql-kotlin
+/java/ql/test-kotlin2/ @github/codeql-kotlin
 
 # ML-powered queries
 /javascript/ql/experimental/adaptivethreatmodeling/ @github/codeql-ml-powered-queries-reviewers

codeql-workspace.yml

@@ -1,7 +1,7 @@
 provide:
   - "*/ql/src/qlpack.yml"
   - "*/ql/lib/qlpack.yml"
-  - "*/ql/test/qlpack.yml"
+  - "*/ql/test*/qlpack.yml"
   - "*/ql/examples/qlpack.yml"
   - "*/ql/consistency-queries/qlpack.yml"
   - "*/ql/automodel/src/qlpack.yml"

cpp/downgrades/0a9eb01d3650642e013eb86be45d952289537f91/upgrade.properties

@@ -0,0 +1,3 @@
+description: Expose whether a function was prototyped or not
+compatibility: backwards
+function_prototyped.rel: delete

cpp/ql/lib/CHANGELOG.md

@@ -1,3 +1,23 @@
+## 0.12.1
+
+### New Features
+
+* Added an `isPrototyped` predicate to `Function` that holds when the function has a prototype.
+
+## 0.12.0
+
+### Breaking Changes
+
+* The expressions `AssignPointerAddExpr` and `AssignPointerSubExpr` are no longer subtypes of `AssignBitwiseOperation`.
+
+### Minor Analysis Improvements
+
+* The "Returning stack-allocated memory" (`cpp/return-stack-allocated-memory`) query now also detects returning stack-allocated memory allocated by calls to `alloca`, `strdupa`, and `strndupa`.
+* Added models for `strlcpy` and `strlcat`.
+* Added models for the `sprintf` variants from the `StrSafe.h` header.
+* Added SQL API models for `ODBC`.
+* Added taint models for `realloc` and related functions.
+
 ## 0.11.0
 
 ### Breaking Changes

cpp/ql/lib/change-notes/2023-10-30-realloc-flow.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Added taint models for `realloc` and related functions.

cpp/ql/lib/change-notes/2023-10-31-assign-pointer-add-sub-expr.md

@@ -1,4 +0,0 @@
----
-category: breaking
----
-* The expressions `AssignPointerAddExpr` and `AssignPointerSubExpr` are no longer subtypes of `AssignBitwiseOperation`.

cpp/ql/lib/change-notes/2023-11-08-strsafe-models.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Added models for the `sprintf` variants from the `StrSafe.h` header.

cpp/ql/lib/change-notes/released/0.12.0.md

@@ -0,0 +1,13 @@
+## 0.12.0
+
+### Breaking Changes
+
+* The expressions `AssignPointerAddExpr` and `AssignPointerSubExpr` are no longer subtypes of `AssignBitwiseOperation`.
+
+### Minor Analysis Improvements
+
+* The "Returning stack-allocated memory" (`cpp/return-stack-allocated-memory`) query now also detects returning stack-allocated memory allocated by calls to `alloca`, `strdupa`, and `strndupa`.
+* Added models for `strlcpy` and `strlcat`.
+* Added models for the `sprintf` variants from the `StrSafe.h` header.
+* Added SQL API models for `ODBC`.
+* Added taint models for `realloc` and related functions.

cpp/ql/lib/change-notes/released/0.12.1.md

@@ -0,0 +1,5 @@
+## 0.12.1
+
+### New Features
+
+* Added an `isPrototyped` predicate to `Function` that holds when the function has a prototype.

cpp/ql/lib/codeql-pack.release.yml

@@ -1,2 +1,2 @@
 ---
-lastReleaseVersion: 0.11.0
+lastReleaseVersion: 0.12.1

cpp/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/cpp-all
-version: 0.11.1-dev
+version: 0.12.1
 groups: cpp
 dbscheme: semmlecode.cpp.dbscheme
 extractor: cpp

cpp/ql/lib/semmle/code/cpp/Function.qll

@@ -112,6 +112,16 @@ class Function extends Declaration, ControlFlowNode, AccessHolder, @function {
    */
   predicate isDeleted() { function_deleted(underlyingElement(this)) }
 
+  /**
+   * Holds if this function has a prototyped interface.
+   *
+   * Functions generally have a prototyped interface, unless they are
+   * K&R-style functions either without any forward function declaration,
+   * or with all the forward declarations omitting the parameters of the
+   * function.
+   */
+  predicate isPrototyped() { function_prototyped(underlyingElement(this)) }
+
   /**
    * Holds if this function is explicitly defaulted with the `= default`
    * specifier.

cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll

@@ -30,11 +30,6 @@ class GuardCondition extends Expr {
     or
     // no binary operators in the IR
     this.(BinaryLogicalOperation).getAnOperand() instanceof GuardCondition
-    or
-    // the IR short-circuits if(!x)
-    // don't produce a guard condition for `y = !x` and other non-short-circuited cases
-    not exists(Instruction inst | this.getFullyConverted() = inst.getAst()) and
-    exists(IRGuardCondition ir | this.(NotExpr).getOperand() = ir.getAst())
   }
 
   /**
@@ -140,39 +135,6 @@ private class GuardConditionFromBinaryLogicalOperator extends GuardCondition {
   }
 }
 
-/**
- * A `!` operator in the AST that guards one or more basic blocks, and does not have a corresponding
- * IR instruction.
- */
-private class GuardConditionFromShortCircuitNot extends GuardCondition, NotExpr {
-  GuardConditionFromShortCircuitNot() {
-    not exists(Instruction inst | this.getFullyConverted() = inst.getAst()) and
-    exists(IRGuardCondition ir | this.getOperand() = ir.getAst())
-  }
-
-  override predicate controls(BasicBlock controlled, boolean testIsTrue) {
-    this.getOperand().(GuardCondition).controls(controlled, testIsTrue.booleanNot())
-  }
-
-  override predicate comparesLt(Expr left, Expr right, int k, boolean isLessThan, boolean testIsTrue) {
-    this.getOperand()
-        .(GuardCondition)
-        .comparesLt(left, right, k, isLessThan, testIsTrue.booleanNot())
-  }
-
-  override predicate ensuresLt(Expr left, Expr right, int k, BasicBlock block, boolean isLessThan) {
-    this.getOperand().(GuardCondition).ensuresLt(left, right, k, block, isLessThan.booleanNot())
-  }
-
-  override predicate comparesEq(Expr left, Expr right, int k, boolean areEqual, boolean testIsTrue) {
-    this.getOperand().(GuardCondition).comparesEq(left, right, k, areEqual, testIsTrue.booleanNot())
-  }
-
-  override predicate ensuresEq(Expr left, Expr right, int k, BasicBlock block, boolean areEqual) {
-    this.getOperand().(GuardCondition).ensuresEq(left, right, k, block, areEqual.booleanNot())
-  }
-}
-
 /**
  * A Boolean condition in the AST that guards one or more basic blocks and has a corresponding IR
  * instruction.

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowPrivate.qll

@@ -81,6 +81,14 @@ class Node0Impl extends TIRDataFlowNode0 {
   /** Gets the operands corresponding to this node, if any. */
   Operand asOperand() { result = this.(OperandNode0).getOperand() }
 
+  /** Gets the location of this node. */
+  final Location getLocation() { result = this.getLocationImpl() }
+
+  /** INTERNAL: Do not use. */
+  Location getLocationImpl() {
+    none() // overridden by subclasses
+  }
+
   /** INTERNAL: Do not use. */
   string toStringImpl() {
     none() // overridden by subclasses
@@ -131,9 +139,15 @@ abstract class InstructionNode0 extends Node0Impl {
   override DataFlowType getType() { result = getInstructionType(instr, _) }
 
   override string toStringImpl() {
-    // This predicate is overridden in subclasses. This default implementation
-    // does not use `Instruction.toString` because that's expensive to compute.
-    result = instr.getOpcode().toString()
+    if instr.(InitializeParameterInstruction).getIRVariable() instanceof IRThisVariable
+    then result = "this"
+    else result = instr.getAst().toString()
+  }
+
+  override Location getLocationImpl() {
+    if exists(instr.getAst().getLocation())
+    then result = instr.getAst().getLocation()
+    else result instanceof UnknownDefaultLocation
   }
 
   final override predicate isGLValue() { exists(getInstructionType(instr, true)) }
@@ -173,7 +187,17 @@ abstract class OperandNode0 extends Node0Impl {
 
   override DataFlowType getType() { result = getOperandType(op, _) }
 
-  override string toStringImpl() { result = op.toString() }
+  override string toStringImpl() {
+    if op.getDef().(InitializeParameterInstruction).getIRVariable() instanceof IRThisVariable
+    then result = "this"
+    else result = op.getDef().getAst().toString()
+  }
+
+  override Location getLocationImpl() {
+    if exists(op.getDef().getAst().getLocation())
+    then result = op.getDef().getAst().getLocation()
+    else result instanceof UnknownDefaultLocation
+  }
 
   final override predicate isGLValue() { exists(getOperandType(op, true)) }
 }
@@ -621,6 +645,24 @@ class GlobalLikeVariable extends Variable {
   }
 }
 
+/**
+ * Returns the smallest indirection for the type `t`.
+ *
+ * For most types this is `1`, but for `ArrayType`s (which are allocated on
+ * the stack) this is `0`
+ */
+int getMinIndirectionsForType(Type t) {
+  if t.getUnspecifiedType() instanceof Cpp::ArrayType then result = 0 else result = 1
+}
+
+private int getMinIndirectionForGlobalUse(Ssa::GlobalUse use) {
+  result = getMinIndirectionsForType(use.getUnspecifiedType())
+}
+
+private int getMinIndirectionForGlobalDef(Ssa::GlobalDef def) {
+  result = getMinIndirectionsForType(def.getUnspecifiedType())
+}
+
 /**
  * Holds if data can flow from `node1` to `node2` in a way that loses the
  * calling context. For example, this would happen with flow through a
@@ -632,7 +674,7 @@ predicate jumpStep(Node n1, Node n2) {
       v = globalUse.getVariable() and
       n1.(FinalGlobalValue).getGlobalUse() = globalUse
     |
-      globalUse.getIndirection() = 1 and
+      globalUse.getIndirection() = getMinIndirectionForGlobalUse(globalUse) and
       v = n2.asVariable()
       or
       v = n2.asIndirectVariable(globalUse.getIndirection())
@@ -642,7 +684,7 @@ predicate jumpStep(Node n1, Node n2) {
       v = globalDef.getVariable() and
       n2.(InitialGlobalValue).getGlobalDef() = globalDef
     |
-      globalDef.getIndirection() = 1 and
+      globalDef.getIndirection() = getMinIndirectionForGlobalDef(globalDef) and
       v = n1.asVariable()
       or
       v = n1.asIndirectVariable(globalDef.getIndirection())

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

@@ -34,7 +34,8 @@ cached
 private newtype TIRDataFlowNode =
   TNode0(Node0Impl node) { DataFlowImplCommon::forceCachingInSameStage() } or
   TVariableNode(Variable var, int indirectionIndex) {
-    indirectionIndex = [1 .. Ssa::getMaxIndirectionsForType(var.getUnspecifiedType())]
+    indirectionIndex =
+      [getMinIndirectionsForType(var.getUnspecifiedType()) .. Ssa::getMaxIndirectionsForType(var.getUnspecifiedType())]
   } or
   TPostFieldUpdateNode(FieldAddress operand, int indirectionIndex) {
     indirectionIndex =
@@ -346,7 +347,9 @@ class Node extends TIRDataFlowNode {
    * Gets the variable corresponding to this node, if any. This can be used for
    * modeling flow in and out of global variables.
    */
-  Variable asVariable() { this = TVariableNode(result, 1) }
+  Variable asVariable() {
+    this = TVariableNode(result, getMinIndirectionsForType(result.getUnspecifiedType()))
+  }
 
   /**
    * Gets the `indirectionIndex`'th indirection of this node's underlying variable, if any.
@@ -354,7 +357,7 @@ class Node extends TIRDataFlowNode {
    * This can be used for modeling flow in and out of global variables.
    */
   Variable asIndirectVariable(int indirectionIndex) {
-    indirectionIndex > 1 and
+    indirectionIndex > getMinIndirectionsForType(result.getUnspecifiedType()) and
     this = TVariableNode(result, indirectionIndex)
   }
 
@@ -432,6 +435,10 @@ private class Node0 extends Node, TNode0 {
 
   override Declaration getFunction() { result = node.getFunction() }
 
+  override Location getLocationImpl() { result = node.getLocation() }
+
+  override string toStringImpl() { result = node.toString() }
+
   override DataFlowType getType() { result = node.getType() }
 
   override predicate isGLValue() { node.isGLValue() }
@@ -448,18 +455,6 @@ class InstructionNode extends Node0 {
 
   /** Gets the instruction corresponding to this node. */
   Instruction getInstruction() { result = instr }
-
-  override Location getLocationImpl() {
-    if exists(instr.getAst().getLocation())
-    then result = instr.getAst().getLocation()
-    else result instanceof UnknownDefaultLocation
-  }
-
-  override string toStringImpl() {
-    if instr.(InitializeParameterInstruction).getIRVariable() instanceof IRThisVariable
-    then result = "this"
-    else result = instr.getAst().toString()
-  }
 }
 
 /**
@@ -473,18 +468,6 @@ class OperandNode extends Node, Node0 {
 
   /** Gets the operand corresponding to this node. */
   Operand getOperand() { result = op }
-
-  override Location getLocationImpl() {
-    if exists(op.getDef().getAst().getLocation())
-    then result = op.getDef().getAst().getLocation()
-    else result instanceof UnknownDefaultLocation
-  }
-
-  override string toStringImpl() {
-    if op.getDef().(InitializeParameterInstruction).getIRVariable() instanceof IRThisVariable
-    then result = "this"
-    else result = op.getDef().getAst().toString()
-  }
 }
 
 /**
@@ -1293,31 +1276,90 @@ abstract private class IndirectExprNodeBase extends Node {
   }
 }
 
-private class IndirectOperandIndirectExprNode extends IndirectExprNodeBase instanceof IndirectOperand
-{
-  IndirectOperandIndirectExprNode() {
-    exists(Expr e, int n, int indirectionIndex |
-      indirectExprNodeShouldBeIndirectOperand(this, e, n, indirectionIndex) and
-      not indirectExprNodeShouldBeIndirectOperand(_, e, n + 1, indirectionIndex)
-    )
+/** A signature for converting an indirect node to an expression. */
+private signature module IndirectNodeToIndirectExprSig {
+  /** The indirect node class to be converted to an expression */
+  class IndirectNode;
+
+  /**
+   * Holds if the indirect expression at indirection index `indirectionIndex`
+   * of `node` is `e`. The integer `n` specifies how many conversions has been
+   * applied to `node`.
+   */
+  predicate indirectNodeHasIndirectExpr(IndirectNode node, Expr e, int n, int indirectionIndex);
+}
+
+/**
+ * A module that implements the logic for deciding whether an indirect node
+ * should be an `IndirectExprNode`.
+ */
+private module IndirectNodeToIndirectExpr<IndirectNodeToIndirectExprSig Sig> {
+  import Sig
+
+  /**
+   * This predicate shifts the indirection index by one when `conv` is a
+   * `ReferenceDereferenceExpr`.
+   *
+   * This is necessary because `ReferenceDereferenceExpr` is a conversion
+   * in the AST, but appears as a `LoadInstruction` in the IR.
+   */
+  bindingset[e, indirectionIndex]
+  private predicate adjustForReference(
+    Expr e, int indirectionIndex, Expr conv, int adjustedIndirectionIndex
+  ) {
+    conv.(ReferenceDereferenceExpr).getExpr() = e and
+    adjustedIndirectionIndex = indirectionIndex - 1
+    or
+    not conv instanceof ReferenceDereferenceExpr and
+    conv = e and
+    adjustedIndirectionIndex = indirectionIndex
   }
 
-  final override Expr getConvertedExpr(int n, int index) {
-    indirectExprNodeShouldBeIndirectOperand(this, result, n, index)
+  /** Holds if `node` should be an `IndirectExprNode`. */
+  predicate charpred(IndirectNode node) {
+    exists(Expr e, int n, int indirectionIndex |
+      indirectNodeHasIndirectExpr(node, e, n, indirectionIndex) and
+      not exists(Expr conv, int adjustedIndirectionIndex |
+        adjustForReference(e, indirectionIndex, conv, adjustedIndirectionIndex) and
+        indirectNodeHasIndirectExpr(_, conv, n + 1, adjustedIndirectionIndex)
+      )
+    )
   }
 }
 
-private class IndirectInstructionIndirectExprNode extends IndirectExprNodeBase instanceof IndirectInstruction
+private module IndirectOperandIndirectExprNodeImpl implements IndirectNodeToIndirectExprSig {
+  class IndirectNode = IndirectOperand;
+
+  predicate indirectNodeHasIndirectExpr = indirectExprNodeShouldBeIndirectOperand/4;
+}
+
+module IndirectOperandToIndirectExpr =
+  IndirectNodeToIndirectExpr<IndirectOperandIndirectExprNodeImpl>;
+
+private class IndirectOperandIndirectExprNode extends IndirectExprNodeBase instanceof IndirectOperand
 {
-  IndirectInstructionIndirectExprNode() {
-    exists(Expr e, int n, int indirectionIndex |
-      indirectExprNodeShouldBeIndirectInstruction(this, e, n, indirectionIndex) and
-      not indirectExprNodeShouldBeIndirectInstruction(_, e, n + 1, indirectionIndex)
-    )
-  }
+  IndirectOperandIndirectExprNode() { IndirectOperandToIndirectExpr::charpred(this) }
 
   final override Expr getConvertedExpr(int n, int index) {
-    indirectExprNodeShouldBeIndirectInstruction(this, result, n, index)
+    IndirectOperandToIndirectExpr::indirectNodeHasIndirectExpr(this, result, n, index)
+  }
+}
+
+private module IndirectInstructionIndirectExprNodeImpl implements IndirectNodeToIndirectExprSig {
+  class IndirectNode = IndirectInstruction;
+
+  predicate indirectNodeHasIndirectExpr = indirectExprNodeShouldBeIndirectInstruction/4;
+}
+
+module IndirectInstructionToIndirectExpr =
+  IndirectNodeToIndirectExpr<IndirectInstructionIndirectExprNodeImpl>;
+
+private class IndirectInstructionIndirectExprNode extends IndirectExprNodeBase instanceof IndirectInstruction
+{
+  IndirectInstructionIndirectExprNode() { IndirectInstructionToIndirectExpr::charpred(this) }
+
+  final override Expr getConvertedExpr(int n, int index) {
+    IndirectInstructionToIndirectExpr::indirectNodeHasIndirectExpr(this, result, n, index)
   }
 }
 

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/SsaInternals.qll

@@ -59,6 +59,9 @@ private module SourceVariables {
       then result = base.getType()
       else result = getTypeImpl(base.getType(), ind - 1)
     }
+
+    /** Gets the location of this variable. */
+    Location getLocation() { result = this.getBaseVariable().getLocation() }
   }
 }
 
@@ -869,7 +872,7 @@ private predicate sourceVariableIsGlobal(
   )
 }
 
-private module SsaInput implements SsaImplCommon::InputSig {
+private module SsaInput implements SsaImplCommon::InputSig<Location> {
   import InputSigCommon
   import SourceVariables
 
@@ -1092,7 +1095,7 @@ class Def extends DefOrUse {
   predicate isCertain() { defOrUse.isCertain() }
 }
 
-private module SsaImpl = SsaImplCommon::Make<SsaInput>;
+private module SsaImpl = SsaImplCommon::Make<Location, SsaInput>;
 
 class PhiNode extends SsaImpl::DefinitionExt {
   PhiNode() {

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/SsaInternalsCommon.qll

@@ -377,6 +377,9 @@ abstract private class AbstractBaseSourceVariable extends TBaseSourceVariable {
   /** Gets a textual representation of this element. */
   abstract string toString();
 
+  /** Gets the location of this variable. */
+  abstract Location getLocation();
+
   /** Gets the type of this base source variable. */
   final DataFlowType getType() { this.getLanguageType().hasUnspecifiedType(result, _) }
 
@@ -395,6 +398,8 @@ class BaseIRVariable extends AbstractBaseSourceVariable, TBaseIRVariable {
 
   override string toString() { result = var.toString() }
 
+  override Location getLocation() { result = var.getLocation() }
+
   override CppType getLanguageType() { result = var.getLanguageType() }
 }
 
@@ -407,6 +412,8 @@ class BaseCallVariable extends AbstractBaseSourceVariable, TBaseCallVariable {
 
   override string toString() { result = call.toString() }
 
+  override Location getLocation() { result = call.getLocation() }
+
   override CppType getLanguageType() { result = getResultLanguageType(call) }
 }
 
@@ -872,7 +879,7 @@ private module Cached {
       upper = countIndirectionsForCppType(type) and
       ind = ind0 + [lower .. upper] and
       indirectionIndex = ind - (ind0 + lower) and
-      (if type.hasType(any(Cpp::ArrayType arrayType), true) then lower = 0 else lower = 1)
+      lower = getMinIndirectionsForType(any(Type t | type.hasUnspecifiedType(t, _)))
     )
   }
 

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/TaintTrackingUtil.qll

@@ -72,6 +72,16 @@ private predicate operandToInstructionTaintStep(Operand opFrom, Instruction inst
     or
     instrTo.(FieldAddressInstruction).getField().getDeclaringType() instanceof Union
   )
+  or
+  // Taint from int to boolean casts. This ensures that we have flow to `!x` in:
+  // ```cpp
+  // x = integer_source();
+  // if(!x) { ... }
+  // ```
+  exists(Operand zero |
+    zero.getDef().(ConstantValueInstruction).getValue() = "0" and
+    instrTo.(CompareNEInstruction).hasOperands(opFrom, zero)
+  )
 }
 
 /**

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/ssa0/SsaInternals.qll

@@ -229,7 +229,7 @@ private class FinalParameterUse extends UseImpl, TFinalParameterUse {
   override predicate isCertain() { any() }
 }
 
-private module SsaInput implements SsaImplCommon::InputSig {
+private module SsaInput implements SsaImplCommon::InputSig<Location> {
   import InputSigCommon
   import SourceVariables
 
@@ -335,7 +335,7 @@ class Def extends DefOrUse {
   predicate isIteratorDef() { defOrUse instanceof IteratorDef }
 }
 
-private module SsaImpl = SsaImplCommon::Make<SsaInput>;
+private module SsaImpl = SsaImplCommon::Make<Location, SsaInput>;
 
 class PhiNode extends SsaImpl::DefinitionExt {
   PhiNode() {

cpp/ql/lib/semmle/code/cpp/ir/implementation/aliased_ssa/constant/ConstantAnalysis.qll

@@ -12,6 +12,9 @@ int getConstantValue(Instruction instr) {
   or
   result = getConstantValue(instr.(CopyInstruction).getSourceValue())
   or
+  getConstantValue(instr.(LogicalNotInstruction).getUnary()) != 0 and
+  result = 0
+  or
   exists(PhiInstruction phi |
     phi = instr and
     result = unique(Operand op | op = phi.getAnInputOperand() | getConstantValue(op.getDef()))
@@ -26,28 +29,25 @@ private predicate binaryInstructionOperands(BinaryInstruction instr, int left, i
 
 pragma[noinline]
 private int getBinaryInstructionValue(BinaryInstruction instr) {
-  exists(int left, int right |
-    binaryInstructionOperands(instr, left, right) and
-    (
-      instr instanceof AddInstruction and result = add(left, right)
-      or
-      instr instanceof SubInstruction and result = sub(left, right)
-      or
-      instr instanceof MulInstruction and result = mul(left, right)
-      or
-      instr instanceof DivInstruction and result = div(left, right)
-      or
-      instr instanceof CompareEQInstruction and result = compareEQ(left, right)
-      or
-      instr instanceof CompareNEInstruction and result = compareNE(left, right)
-      or
-      instr instanceof CompareLTInstruction and result = compareLT(left, right)
-      or
-      instr instanceof CompareGTInstruction and result = compareGT(left, right)
-      or
-      instr instanceof CompareLEInstruction and result = compareLE(left, right)
-      or
-      instr instanceof CompareGEInstruction and result = compareGE(left, right)
-    )
+  exists(int left, int right | binaryInstructionOperands(instr, left, right) |
+    instr instanceof AddInstruction and result = add(left, right)
+    or
+    instr instanceof SubInstruction and result = sub(left, right)
+    or
+    instr instanceof MulInstruction and result = mul(left, right)
+    or
+    instr instanceof DivInstruction and result = div(left, right)
+    or
+    instr instanceof CompareEQInstruction and result = compareEQ(left, right)
+    or
+    instr instanceof CompareNEInstruction and result = compareNE(left, right)
+    or
+    instr instanceof CompareLTInstruction and result = compareLT(left, right)
+    or
+    instr instanceof CompareGTInstruction and result = compareGT(left, right)
+    or
+    instr instanceof CompareLEInstruction and result = compareLE(left, right)
+    or
+    instr instanceof CompareGEInstruction and result = compareGE(left, right)
   )
 }

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/constant/ConstantAnalysis.qll

@@ -12,6 +12,9 @@ int getConstantValue(Instruction instr) {
   or
   result = getConstantValue(instr.(CopyInstruction).getSourceValue())
   or
+  getConstantValue(instr.(LogicalNotInstruction).getUnary()) != 0 and
+  result = 0
+  or
   exists(PhiInstruction phi |
     phi = instr and
     result = unique(Operand op | op = phi.getAnInputOperand() | getConstantValue(op.getDef()))
@@ -26,28 +29,25 @@ private predicate binaryInstructionOperands(BinaryInstruction instr, int left, i
 
 pragma[noinline]
 private int getBinaryInstructionValue(BinaryInstruction instr) {
-  exists(int left, int right |
-    binaryInstructionOperands(instr, left, right) and
-    (
-      instr instanceof AddInstruction and result = add(left, right)
-      or
-      instr instanceof SubInstruction and result = sub(left, right)
-      or
-      instr instanceof MulInstruction and result = mul(left, right)
-      or
-      instr instanceof DivInstruction and result = div(left, right)
-      or
-      instr instanceof CompareEQInstruction and result = compareEQ(left, right)
-      or
-      instr instanceof CompareNEInstruction and result = compareNE(left, right)
-      or
-      instr instanceof CompareLTInstruction and result = compareLT(left, right)
-      or
-      instr instanceof CompareGTInstruction and result = compareGT(left, right)
-      or
-      instr instanceof CompareLEInstruction and result = compareLE(left, right)
-      or
-      instr instanceof CompareGEInstruction and result = compareGE(left, right)
-    )
+  exists(int left, int right | binaryInstructionOperands(instr, left, right) |
+    instr instanceof AddInstruction and result = add(left, right)
+    or
+    instr instanceof SubInstruction and result = sub(left, right)
+    or
+    instr instanceof MulInstruction and result = mul(left, right)
+    or
+    instr instanceof DivInstruction and result = div(left, right)
+    or
+    instr instanceof CompareEQInstruction and result = compareEQ(left, right)
+    or
+    instr instanceof CompareNEInstruction and result = compareNE(left, right)
+    or
+    instr instanceof CompareLTInstruction and result = compareLT(left, right)
+    or
+    instr instanceof CompareGTInstruction and result = compareGT(left, right)
+    or
+    instr instanceof CompareLEInstruction and result = compareLE(left, right)
+    or
+    instr instanceof CompareGEInstruction and result = compareGE(left, right)
   )
 }

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/internal/TranslatedCondition.qll

@@ -77,24 +77,6 @@ class TranslatedParenthesisCondition extends TranslatedFlexibleCondition {
   }
 }
 
-class TranslatedNotCondition extends TranslatedFlexibleCondition {
-  override NotExpr expr;
-
-  override Instruction getChildTrueSuccessor(TranslatedCondition child) {
-    child = this.getOperand() and
-    result = this.getConditionContext().getChildFalseSuccessor(this)
-  }
-
-  override Instruction getChildFalseSuccessor(TranslatedCondition child) {
-    child = this.getOperand() and
-    result = this.getConditionContext().getChildTrueSuccessor(this)
-  }
-
-  override TranslatedCondition getOperand() {
-    result = getTranslatedCondition(expr.getOperand().getFullyConverted())
-  }
-}
-
 abstract class TranslatedNativeCondition extends TranslatedCondition, TTranslatedNativeCondition {
   TranslatedNativeCondition() { this = TTranslatedNativeCondition(expr) }
 

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/internal/TranslatedElement.qll

@@ -190,10 +190,7 @@ private predicate isNativeCondition(Expr expr) {
  * depending on context.
  */
 private predicate isFlexibleCondition(Expr expr) {
-  (
-    expr instanceof ParenthesisExpr or
-    expr instanceof NotExpr
-  ) and
+  expr instanceof ParenthesisExpr and
   usedAsCondition(expr) and
   not isIRConstant(expr)
 }
@@ -218,11 +215,6 @@ private predicate usedAsCondition(Expr expr) {
     condExpr.getCondition().getFullyConverted() = expr and not condExpr.isTwoOperand()
   )
   or
-  exists(NotExpr notExpr |
-    notExpr.getOperand().getFullyConverted() = expr and
-    usedAsCondition(notExpr)
-  )
-  or
   exists(ParenthesisExpr paren |
     paren.getExpr() = expr and
     usedAsCondition(paren)

cpp/ql/lib/semmle/code/cpp/ir/implementation/unaliased_ssa/constant/ConstantAnalysis.qll

@@ -12,6 +12,9 @@ int getConstantValue(Instruction instr) {
   or
   result = getConstantValue(instr.(CopyInstruction).getSourceValue())
   or
+  getConstantValue(instr.(LogicalNotInstruction).getUnary()) != 0 and
+  result = 0
+  or
   exists(PhiInstruction phi |
     phi = instr and
     result = unique(Operand op | op = phi.getAnInputOperand() | getConstantValue(op.getDef()))
@@ -26,28 +29,25 @@ private predicate binaryInstructionOperands(BinaryInstruction instr, int left, i
 
 pragma[noinline]
 private int getBinaryInstructionValue(BinaryInstruction instr) {
-  exists(int left, int right |
-    binaryInstructionOperands(instr, left, right) and
-    (
-      instr instanceof AddInstruction and result = add(left, right)
-      or
-      instr instanceof SubInstruction and result = sub(left, right)
-      or
-      instr instanceof MulInstruction and result = mul(left, right)
-      or
-      instr instanceof DivInstruction and result = div(left, right)
-      or
-      instr instanceof CompareEQInstruction and result = compareEQ(left, right)
-      or
-      instr instanceof CompareNEInstruction and result = compareNE(left, right)
-      or
-      instr instanceof CompareLTInstruction and result = compareLT(left, right)
-      or
-      instr instanceof CompareGTInstruction and result = compareGT(left, right)
-      or
-      instr instanceof CompareLEInstruction and result = compareLE(left, right)
-      or
-      instr instanceof CompareGEInstruction and result = compareGE(left, right)
-    )
+  exists(int left, int right | binaryInstructionOperands(instr, left, right) |
+    instr instanceof AddInstruction and result = add(left, right)
+    or
+    instr instanceof SubInstruction and result = sub(left, right)
+    or
+    instr instanceof MulInstruction and result = mul(left, right)
+    or
+    instr instanceof DivInstruction and result = div(left, right)
+    or
+    instr instanceof CompareEQInstruction and result = compareEQ(left, right)
+    or
+    instr instanceof CompareNEInstruction and result = compareNE(left, right)
+    or
+    instr instanceof CompareLTInstruction and result = compareLT(left, right)
+    or
+    instr instanceof CompareGTInstruction and result = compareGT(left, right)
+    or
+    instr instanceof CompareLEInstruction and result = compareLE(left, right)
+    or
+    instr instanceof CompareGEInstruction and result = compareGE(left, right)
   )
 }

cpp/ql/lib/semmle/code/cpp/models/implementations/Getenv.qll

@@ -16,10 +16,7 @@ class Getenv extends LocalFlowSourceFunction {
   }
 
   override predicate hasLocalFlowSource(FunctionOutput output, string description) {
-    (
-      output.isReturnValueDeref() or
-      output.isReturnValue()
-    ) and
+    output.isReturnValueDeref() and
     description = "an environment variable"
   }
 }

cpp/ql/lib/semmle/code/cpp/models/implementations/Gets.qll

@@ -51,7 +51,6 @@ private class FgetsFunction extends DataFlowFunction, TaintFunction, ArrayFuncti
   override predicate hasRemoteFlowSource(FunctionOutput output, string description) {
     (
       output.isParameterDeref(0) or
-      output.isReturnValue() or
       output.isReturnValueDeref()
     ) and
     description = "string read by " + this.getName()
@@ -102,7 +101,6 @@ private class GetsFunction extends DataFlowFunction, ArrayFunction, AliasFunctio
   override predicate hasLocalFlowSource(FunctionOutput output, string description) {
     (
       output.isParameterDeref(0) or
-      output.isReturnValue() or
       output.isReturnValueDeref()
     ) and
     description = "string read by " + this.getName()

cpp/ql/lib/semmle/code/cpp/models/implementations/StdContainer.qll

@@ -123,7 +123,7 @@ private class StdSequenceContainerData extends TaintFunction {
 /**
  * The standard container functions `push_back` and `push_front`.
  */
-private class StdSequenceContainerPush extends TaintFunction {
+class StdSequenceContainerPush extends MemberFunction {
   StdSequenceContainerPush() {
     this.getClassAndName("push_back") instanceof Vector or
     this.getClassAndName(["push_back", "push_front"]) instanceof Deque or
@@ -131,6 +131,17 @@ private class StdSequenceContainerPush extends TaintFunction {
     this.getClassAndName(["push_back", "push_front"]) instanceof List
   }
 
+  /**
+   * Gets the index of a parameter to this function that is a reference to the
+   * value type of the container.
+   */
+  int getAValueTypeParameterIndex() {
+    this.getParameter(result).getUnspecifiedType().(ReferenceType).getBaseType() =
+      this.getDeclaringType().getTemplateArgument(0).(Type).getUnspecifiedType() // i.e. the `T` of this `std::vector<T>`
+  }
+}
+
+private class StdSequenceContainerPushModel extends StdSequenceContainerPush, TaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from parameter to qualifier
     input.isParameterDeref(0) and
@@ -160,7 +171,7 @@ private class StdSequenceContainerFrontBack extends TaintFunction {
 /**
  * The standard container functions `insert` and `insert_after`.
  */
-private class StdSequenceContainerInsert extends TaintFunction {
+class StdSequenceContainerInsert extends MemberFunction {
   StdSequenceContainerInsert() {
     this.getClassAndName("insert") instanceof Deque or
     this.getClassAndName("insert") instanceof List or
@@ -181,7 +192,9 @@ private class StdSequenceContainerInsert extends TaintFunction {
    * Gets the index of a parameter to this function that is an iterator.
    */
   int getAnIteratorParameterIndex() { this.getParameter(result).getType() instanceof Iterator }
+}
 
+private class StdSequenceContainerInsertModel extends StdSequenceContainerInsert, TaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from parameter to container itself (qualifier) and return value
     (
@@ -253,11 +266,28 @@ private class StdSequenceContainerAt extends TaintFunction {
 }
 
 /**
- * The standard vector `emplace` function.
+ * The standard `emplace` function.
  */
-class StdVectorEmplace extends TaintFunction {
-  StdVectorEmplace() { this.getClassAndName("emplace") instanceof Vector }
+class StdSequenceEmplace extends MemberFunction {
+  StdSequenceEmplace() {
+    this.getClassAndName("emplace") instanceof Vector
+    or
+    this.getClassAndName("emplace") instanceof List
+    or
+    this.getClassAndName("emplace") instanceof Deque
+  }
 
+  /**
+   * Gets the index of a parameter to this function that is a reference to the
+   * value type of the container.
+   */
+  int getAValueTypeParameterIndex() {
+    this.getParameter(result).getUnspecifiedType().(ReferenceType).getBaseType() =
+      this.getDeclaringType().getTemplateArgument(0).(Type).getUnspecifiedType() // i.e. the `T` of this `std::vector<T>`
+  }
+}
+
+private class StdSequenceEmplaceModel extends StdSequenceEmplace, TaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from any parameter except the position iterator to qualifier and return value
     // (here we assume taint flow from any constructor parameter to the constructed object)
@@ -269,12 +299,36 @@ class StdVectorEmplace extends TaintFunction {
   }
 }
 
+/**
+ * The standard vector `emplace` function.
+ */
+class StdVectorEmplace extends StdSequenceEmplace {
+  StdVectorEmplace() { this.getDeclaringType() instanceof Vector }
+}
+
 /**
  * The standard vector `emplace_back` function.
  */
-class StdVectorEmplaceBack extends TaintFunction {
-  StdVectorEmplaceBack() { this.getClassAndName("emplace_back") instanceof Vector }
+class StdSequenceEmplaceBack extends MemberFunction {
+  StdSequenceEmplaceBack() {
+    this.getClassAndName("emplace_back") instanceof Vector
+    or
+    this.getClassAndName("emplace_back") instanceof List
+    or
+    this.getClassAndName("emplace_back") instanceof Deque
+  }
 
+  /**
+   * Gets the index of a parameter to this function that is a reference to the
+   * value type of the container.
+   */
+  int getAValueTypeParameterIndex() {
+    this.getParameter(result).getUnspecifiedType().(ReferenceType).getBaseType() =
+      this.getDeclaringType().getTemplateArgument(0).(Type).getUnspecifiedType() // i.e. the `T` of this `std::vector<T>`
+  }
+}
+
+private class StdSequenceEmplaceBackModel extends StdSequenceEmplaceBack, TaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from any parameter to qualifier
     // (here we assume taint flow from any constructor parameter to the constructed object)
@@ -282,3 +336,10 @@ class StdVectorEmplaceBack extends TaintFunction {
     output.isQualifierObject()
   }
 }
+
+/**
+ * The standard vector `emplace_back` function.
+ */
+class StdVectorEmplaceBack extends StdSequenceEmplaceBack {
+  StdVectorEmplaceBack() { this.getDeclaringType() instanceof Vector }
+}

cpp/ql/lib/semmle/code/cpp/models/implementations/StdString.qll

@@ -99,9 +99,11 @@ private class StdStringConstructor extends Constructor, StdStringTaintFunction {
 /**
  * The `std::string` function `c_str`.
  */
-private class StdStringCStr extends StdStringTaintFunction {
+class StdStringCStr extends MemberFunction {
   StdStringCStr() { this.getClassAndName("c_str") instanceof StdBasicString }
+}
 
+private class StdStringCStrModel extends StdStringCStr, StdStringTaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from string itself (qualifier) to return value
     input.isQualifierObject() and
@@ -112,9 +114,11 @@ private class StdStringCStr extends StdStringTaintFunction {
 /**
  * The `std::string` function `data`.
  */
-private class StdStringData extends StdStringTaintFunction {
+class StdStringData extends MemberFunction {
   StdStringData() { this.getClassAndName("data") instanceof StdBasicString }
+}
 
+private class StdStringDataModel extends StdStringData, StdStringTaintFunction {
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from string itself (qualifier) to return value
     input.isQualifierObject() and

cpp/ql/lib/semmle/code/cpp/models/implementations/Strcat.qll

@@ -10,6 +10,8 @@ import semmle.code.cpp.models.interfaces.SideEffect
 
 /**
  * The standard function `strcat` and its wide, sized, and Microsoft variants.
+ *
+ * Does not include `strlcat`, which is covered by `StrlcatFunction`
  */
 class StrcatFunction extends TaintFunction, DataFlowFunction, ArrayFunction, SideEffectFunction {
   StrcatFunction() {
@@ -90,3 +92,64 @@ class StrcatFunction extends TaintFunction, DataFlowFunction, ArrayFunction, Sid
     buffer = true
   }
 }
+
+/**
+ * The `strlcat` function.
+ */
+class StrlcatFunction extends TaintFunction, ArrayFunction, SideEffectFunction {
+  StrlcatFunction() {
+    this.hasGlobalName("strlcat") // strlcat(dst, src, dst_size)
+  }
+
+  /**
+   * Gets the index of the parameter that is the size of the copy (in characters).
+   */
+  int getParamSize() { result = 2 }
+
+  /**
+   * Gets the index of the parameter that is the source of the copy.
+   */
+  int getParamSrc() { result = 1 }
+
+  /**
+   * Gets the index of the parameter that is the destination to be appended to.
+   */
+  int getParamDest() { result = 0 }
+
+  override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
+    (
+      input.isParameter(2)
+      or
+      input.isParameterDeref(0)
+      or
+      input.isParameterDeref(1)
+    ) and
+    output.isParameterDeref(0)
+  }
+
+  override predicate hasArrayInput(int param) {
+    param = 0 or
+    param = 1
+  }
+
+  override predicate hasArrayOutput(int param) { param = 0 }
+
+  override predicate hasArrayWithNullTerminator(int param) { param = 1 }
+
+  override predicate hasArrayWithUnknownSize(int param) { param = 0 }
+
+  override predicate hasOnlySpecificReadSideEffects() { any() }
+
+  override predicate hasOnlySpecificWriteSideEffects() { any() }
+
+  override predicate hasSpecificWriteSideEffect(ParameterIndex i, boolean buffer, boolean mustWrite) {
+    i = 0 and
+    buffer = true and
+    mustWrite = false
+  }
+
+  override predicate hasSpecificReadSideEffect(ParameterIndex i, boolean buffer) {
+    (i = 0 or i = 1) and
+    buffer = true
+  }
+}

cpp/ql/lib/semmle/code/cpp/models/implementations/Strcpy.qll

@@ -32,7 +32,8 @@ class StrcpyFunction extends ArrayFunction, DataFlowFunction, TaintFunction, Sid
         "wcsxfrm_l", // _strxfrm_l(dest, src, max_amount, locale)
         "_mbsnbcpy", // _mbsnbcpy(dest, src, max_amount)
         "stpcpy", // stpcpy(dest, src)
-        "stpncpy" // stpcpy(dest, src, max_amount)
+        "stpncpy", // stpncpy(dest, src, max_amount)
+        "strlcpy" // strlcpy(dst, src, dst_size)
       ])
     or
     (
@@ -53,6 +54,11 @@ class StrcpyFunction extends ArrayFunction, DataFlowFunction, TaintFunction, Sid
    */
   private predicate isSVariant() { this.getName().matches("%\\_s") }
 
+  /**
+   * Holds if the function returns the total length the string would have had if the size was unlimited.
+   */
+  private predicate returnsTotalLength() { this.getName() = "strlcpy" }
+
   /**
    * Gets the index of the parameter that is the maximum size of the copy (in characters).
    */
@@ -60,7 +66,7 @@ class StrcpyFunction extends ArrayFunction, DataFlowFunction, TaintFunction, Sid
     if this.isSVariant()
     then result = 1
     else (
-      this.getName().matches(["%ncpy%", "%nbcpy%", "%xfrm%"]) and
+      this.getName().matches(["%ncpy%", "%nbcpy%", "%xfrm%", "strlcpy"]) and
       result = 2
     )
   }
@@ -100,6 +106,7 @@ class StrcpyFunction extends ArrayFunction, DataFlowFunction, TaintFunction, Sid
     input.isParameterDeref(this.getParamSrc()) and
     output.isReturnValueDeref()
     or
+    not this.returnsTotalLength() and
     input.isParameter(this.getParamDest()) and
     output.isReturnValue()
   }
@@ -110,8 +117,9 @@ class StrcpyFunction extends ArrayFunction, DataFlowFunction, TaintFunction, Sid
     exists(this.getParamSize()) and
     input.isParameterDeref(this.getParamSrc()) and
     (
-      output.isParameterDeref(this.getParamDest()) or
-      output.isReturnValueDeref()
+      output.isParameterDeref(this.getParamDest())
+      or
+      not this.returnsTotalLength() and output.isReturnValueDeref()
     )
   }
 

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/SemanticSSA.qll

@@ -22,8 +22,6 @@ class SemSsaExplicitUpdate extends SemSsaVariable {
 
   SemSsaExplicitUpdate() { Specific::explicitUpdate(this, sourceExpr) }
 
-  final SemExpr getSourceExpr() { result = sourceExpr }
-
   final SemExpr getDefiningExpr() { result = sourceExpr }
 }
 

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/ConstantAnalysis.qll

@@ -14,7 +14,7 @@ private predicate constantIntegerExpr(SemExpr e, int val) {
   // Copy of another constant
   exists(SemSsaExplicitUpdate v, SemExpr src |
     e = v.getAUse() and
-    src = v.getSourceExpr() and
+    src = v.getDefiningExpr() and
     constantIntegerExpr(src, val)
   )
   or

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/RangeAnalysisConstantSpecific.qll

@@ -22,30 +22,7 @@ module CppLangImplConstant implements LangSig<Sem, FloatDelta> {
   predicate hasConstantBound(SemExpr e, float bound, boolean upper) { none() }
 
   /**
-   * Holds if `e >= bound + delta` (if `upper = false`) or `e <= bound + delta` (if `upper = true`).
+   * Holds if `e2 >= e1 + delta` (if `upper = false`) or `e2 <= e1 + delta` (if `upper = true`).
    */
-  predicate hasBound(SemExpr e, SemExpr bound, float delta, boolean upper) { none() }
-
-  /**
-   * Holds if the value of `dest` is known to be `src + delta`.
-   */
-  predicate additionalValueFlowStep(SemExpr dest, SemExpr src, float delta) { none() }
-
-  /**
-   * Gets the type that range analysis should use to track the result of the specified expression,
-   * if a type other than the original type of the expression is to be used.
-   *
-   * This predicate is commonly used in languages that support immutable "boxed" types that are
-   * actually references but whose values can be tracked as the type contained in the box.
-   */
-  SemType getAlternateType(SemExpr e) { none() }
-
-  /**
-   * Gets the type that range analysis should use to track the result of the specified source
-   * variable, if a type other than the original type of the expression is to be used.
-   *
-   * This predicate is commonly used in languages that support immutable "boxed" types that are
-   * actually references but whose values can be tracked as the type contained in the box.
-   */
-  SemType getAlternateTypeForSsaVariable(SemSsaVariable var) { none() }
+  predicate additionalBoundFlowStep(SemExpr e2, SemExpr e1, float delta, boolean upper) { none() }
 }

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/RangeAnalysisImpl.qll

@@ -1,7 +1,6 @@
 private import RangeAnalysisConstantSpecific
 private import RangeAnalysisRelativeSpecific
 private import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.FloatDelta
-private import RangeUtils
 private import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticExpr
 private import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticCFG
 private import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticGuard
@@ -88,12 +87,18 @@ module Sem implements Semantic {
 
   class AddressType = SemAddressType;
 
+  SemType getExprType(SemExpr e) { result = e.getSemType() }
+
+  SemType getSsaType(SemSsaVariable var) { result = var.getType() }
+
   class SsaVariable = SemSsaVariable;
 
   class SsaPhiNode = SemSsaPhiNode;
 
   class SsaExplicitUpdate = SemSsaExplicitUpdate;
 
+  predicate additionalValueFlowStep(SemExpr dest, SemExpr src, int delta) { none() }
+
   predicate conversionCannotOverflow(Type fromType, Type toType) {
     SemanticType::conversionCannotOverflow(fromType, toType)
   }
@@ -101,7 +106,7 @@ module Sem implements Semantic {
 
 module SignAnalysis implements SignAnalysisSig<Sem> {
   private import SignAnalysisCommon as SA
-  import SA::SignAnalysis<FloatDelta, Util>
+  import SA::SignAnalysis<FloatDelta>
 }
 
 module ConstantBounds implements BoundSig<SemLocation, Sem, FloatDelta> {
@@ -164,18 +169,16 @@ private module ModulusAnalysisInstantiated implements ModulusAnalysisSig<Sem> {
   class ModBound = AllBounds::SemBound;
 
   private import codeql.rangeanalysis.ModulusAnalysis as MA
-  import MA::ModulusAnalysis<SemLocation, Sem, FloatDelta, AllBounds, Util>
+  import MA::ModulusAnalysis<SemLocation, Sem, FloatDelta, AllBounds>
 }
 
-module Util = RangeUtil<FloatDelta, CppLangImplConstant>;
-
 module ConstantStage =
   RangeStage<SemLocation, Sem, FloatDelta, ConstantBounds, FloatOverflow, CppLangImplConstant,
-    SignAnalysis, ModulusAnalysisInstantiated, Util>;
+    SignAnalysis, ModulusAnalysisInstantiated>;
 
 module RelativeStage =
   RangeStage<SemLocation, Sem, FloatDelta, RelativeBounds, FloatOverflow, CppLangImplRelative,
-    SignAnalysis, ModulusAnalysisInstantiated, Util>;
+    SignAnalysis, ModulusAnalysisInstantiated>;
 
 private newtype TSemReason =
   TSemNoReason() or

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/RangeAnalysisRelativeSpecific.qll

@@ -54,30 +54,7 @@ module CppLangImplRelative implements LangSig<Sem, FloatDelta> {
   predicate hasConstantBound(SemExpr e, float bound, boolean upper) { none() }
 
   /**
-   * Holds if `e >= bound + delta` (if `upper = false`) or `e <= bound + delta` (if `upper = true`).
+   * Holds if `e2 >= e1 + delta` (if `upper = false`) or `e2 <= e1 + delta` (if `upper = true`).
    */
-  predicate hasBound(SemExpr e, SemExpr bound, float delta, boolean upper) { none() }
-
-  /**
-   * Holds if the value of `dest` is known to be `src + delta`.
-   */
-  predicate additionalValueFlowStep(SemExpr dest, SemExpr src, float delta) { none() }
-
-  /**
-   * Gets the type that range analysis should use to track the result of the specified expression,
-   * if a type other than the original type of the expression is to be used.
-   *
-   * This predicate is commonly used in languages that support immutable "boxed" types that are
-   * actually references but whose values can be tracked as the type contained in the box.
-   */
-  SemType getAlternateType(SemExpr e) { none() }
-
-  /**
-   * Gets the type that range analysis should use to track the result of the specified source
-   * variable, if a type other than the original type of the expression is to be used.
-   *
-   * This predicate is commonly used in languages that support immutable "boxed" types that are
-   * actually references but whose values can be tracked as the type contained in the box.
-   */
-  SemType getAlternateTypeForSsaVariable(SemSsaVariable var) { none() }
+  predicate additionalBoundFlowStep(SemExpr e2, SemExpr e1, float delta, boolean upper) { none() }
 }

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/RangeUtils.qll

@@ -1,136 +0,0 @@
-/**
- * Provides utility predicates for range analysis.
- */
-
-private import semmle.code.cpp.rangeanalysis.new.internal.semantic.Semantic
-private import RangeAnalysisRelativeSpecific
-private import codeql.rangeanalysis.RangeAnalysis
-private import RangeAnalysisImpl
-private import ConstantAnalysis
-
-module RangeUtil<DeltaSig D, LangSig<Sem, D> Lang> implements UtilSig<Sem, D> {
-  /**
-   * Gets an expression that equals `v - d`.
-   */
-  private SemExpr semSsaRead(SemSsaVariable v, D::Delta delta) {
-    // There are various language-specific extension points that can be removed once we no longer
-    // expect to match the original Java implementation's results exactly.
-    result = v.getAUse() and delta = D::fromInt(0)
-    or
-    exists(D::Delta d1, SemConstantIntegerExpr c |
-      result.(SemAddExpr).hasOperands(semSsaRead(v, d1), c) and
-      delta = D::fromFloat(D::toFloat(d1) - c.getIntValue())
-    )
-    or
-    exists(SemSubExpr sub, D::Delta d1, SemConstantIntegerExpr c |
-      result = sub and
-      sub.getLeftOperand() = semSsaRead(v, d1) and
-      sub.getRightOperand() = c and
-      delta = D::fromFloat(D::toFloat(d1) + c.getIntValue())
-    )
-    or
-    result = v.(SemSsaExplicitUpdate).getSourceExpr() and
-    delta = D::fromFloat(0)
-    or
-    result.(SemCopyValueExpr).getOperand() = semSsaRead(v, delta)
-    or
-    result.(SemStoreExpr).getOperand() = semSsaRead(v, delta)
-  }
-
-  /**
-   * Gets a condition that tests whether `v` equals `e + delta`.
-   *
-   * If the condition evaluates to `testIsTrue`:
-   * - `isEq = true`  : `v == e + delta`
-   * - `isEq = false` : `v != e + delta`
-   */
-  pragma[nomagic]
-  SemGuard semEqFlowCond(
-    SemSsaVariable v, SemExpr e, D::Delta delta, boolean isEq, boolean testIsTrue
-  ) {
-    exists(boolean eqpolarity |
-      result.isEquality(semSsaRead(v, delta), e, eqpolarity) and
-      (testIsTrue = true or testIsTrue = false) and
-      eqpolarity.booleanXor(testIsTrue).booleanNot() = isEq
-    )
-    or
-    exists(boolean testIsTrue0 |
-      semImplies_v2(result, testIsTrue, semEqFlowCond(v, e, delta, isEq, testIsTrue0), testIsTrue0)
-    )
-  }
-
-  /**
-   * Holds if `v` is an `SsaExplicitUpdate` that equals `e + delta`.
-   */
-  predicate semSsaUpdateStep(SemSsaExplicitUpdate v, SemExpr e, D::Delta delta) {
-    exists(SemExpr defExpr | defExpr = v.getSourceExpr() |
-      defExpr.(SemCopyValueExpr).getOperand() = e and delta = D::fromFloat(0)
-      or
-      defExpr.(SemStoreExpr).getOperand() = e and delta = D::fromFloat(0)
-      or
-      defExpr.(SemAddOneExpr).getOperand() = e and delta = D::fromFloat(1)
-      or
-      defExpr.(SemSubOneExpr).getOperand() = e and delta = D::fromFloat(-1)
-      or
-      e = defExpr and
-      not (
-        defExpr instanceof SemCopyValueExpr or
-        defExpr instanceof SemStoreExpr or
-        defExpr instanceof SemAddOneExpr or
-        defExpr instanceof SemSubOneExpr
-      ) and
-      delta = D::fromFloat(0)
-    )
-  }
-
-  /**
-   * Holds if `e1 + delta` equals `e2`.
-   */
-  predicate semValueFlowStep(SemExpr e2, SemExpr e1, D::Delta delta) {
-    e2.(SemCopyValueExpr).getOperand() = e1 and delta = D::fromFloat(0)
-    or
-    e2.(SemStoreExpr).getOperand() = e1 and delta = D::fromFloat(0)
-    or
-    e2.(SemAddOneExpr).getOperand() = e1 and delta = D::fromFloat(1)
-    or
-    e2.(SemSubOneExpr).getOperand() = e1 and delta = D::fromFloat(-1)
-    or
-    Lang::additionalValueFlowStep(e2, e1, delta)
-    or
-    exists(SemExpr x | e2.(SemAddExpr).hasOperands(e1, x) |
-      D::fromInt(x.(SemConstantIntegerExpr).getIntValue()) = delta
-    )
-    or
-    exists(SemExpr x, SemSubExpr sub |
-      e2 = sub and
-      sub.getLeftOperand() = e1 and
-      sub.getRightOperand() = x
-    |
-      D::fromInt(-x.(SemConstantIntegerExpr).getIntValue()) = delta
-    )
-  }
-
-  /**
-   * Gets the type used to track the specified expression's range information.
-   *
-   * Usually, this just `e.getSemType()`, but the language can override this to track immutable boxed
-   * primitive types as the underlying primitive type.
-   */
-  SemType getTrackedType(SemExpr e) {
-    result = Lang::getAlternateType(e)
-    or
-    not exists(Lang::getAlternateType(e)) and result = e.getSemType()
-  }
-
-  /**
-   * Gets the type used to track the specified source variable's range information.
-   *
-   * Usually, this just `e.getType()`, but the language can override this to track immutable boxed
-   * primitive types as the underlying primitive type.
-   */
-  SemType getTrackedTypeForSsaVariable(SemSsaVariable var) {
-    result = Lang::getAlternateTypeForSsaVariable(var)
-    or
-    not exists(Lang::getAlternateTypeForSsaVariable(var)) and result = var.getType()
-  }
-}

cpp/ql/lib/semmle/code/cpp/rangeanalysis/new/internal/semantic/analysis/SignAnalysisCommon.qll

@@ -11,10 +11,9 @@ private import RangeAnalysisImpl
 private import SignAnalysisSpecific as Specific
 private import semmle.code.cpp.rangeanalysis.new.internal.semantic.Semantic
 private import ConstantAnalysis
-private import RangeUtils
 private import Sign
 
-module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
+module SignAnalysis<DeltaSig D> {
   private import codeql.rangeanalysis.internal.RangeUtils::MakeUtils<Sem, D>
 
   /**
@@ -39,7 +38,7 @@ module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
 
   /** An SSA definition whose sign is determined by the sign of that definitions source expression. */
   private class ExplicitSignDef extends FlowSignDef instanceof SemSsaExplicitUpdate {
-    final override Sign getSign() { result = semExprSign(super.getSourceExpr()) }
+    final override Sign getSign() { result = semExprSign(super.getDefiningExpr()) }
   }
 
   /** An SSA Phi definition, whose sign is the union of the signs of its inputs. */
@@ -148,7 +147,7 @@ module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
       not this instanceof ConstantSignExpr and
       (
         // Only track numeric types.
-        Utils::getTrackedType(this) instanceof SemNumericType
+        Sem::getExprType(this) instanceof SemNumericType
         or
         // Unless the language says to track this expression anyway.
         Specific::trackUnknownNonNumericExpr(this)
@@ -203,7 +202,7 @@ module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
 
   /** An expression of an unsigned type. */
   private class UnsignedExpr extends FlowSignExpr {
-    UnsignedExpr() { Utils::getTrackedType(this) instanceof SemUnsignedIntegerType }
+    UnsignedExpr() { Sem::getExprType(this) instanceof SemUnsignedIntegerType }
 
     override Sign getSignRestriction() {
       result = TPos() or
@@ -276,7 +275,7 @@ module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
     override SemUnboxExpr cast;
 
     UnboxSignExpr() {
-      exists(SemType fromType | fromType = Utils::getTrackedType(cast.getOperand()) |
+      exists(SemType fromType | fromType = Sem::getExprType(cast.getOperand()) |
         // Only numeric source types are handled here.
         fromType instanceof SemNumericType
       )
@@ -471,7 +470,7 @@ module SignAnalysis<DeltaSig D, UtilSig<Sem, D> Utils> {
   Sign semExprSign(SemExpr e) {
     exists(Sign s | s = e.(SignExpr).getSign() |
       if
-        Utils::getTrackedType(e) instanceof SemUnsignedIntegerType and
+        Sem::getExprType(e) instanceof SemUnsignedIntegerType and
         s = TNeg() and
         not Specific::ignoreTypeRestrictions(e)
       then result = TPos()

cpp/ql/lib/semmlecode.cpp.dbscheme

@@ -405,6 +405,8 @@ function_deleted(unique int id: @function ref);
 
 function_defaulted(unique int id: @function ref);
 
+function_prototyped(unique int id: @function ref)
+
 member_function_this_type(
     unique int id: @function ref,
     int this_type: @type ref

cpp/ql/lib/upgrades/8cba93a44180e0d50a80a660950800d822b981fc/upgrade.properties

@@ -0,0 +1,2 @@
+description: Expose whether a function was prototyped or not
+compatibility: partial

cpp/ql/src/CHANGELOG.md

@@ -1,3 +1,19 @@
+## 0.9.0
+
+### Breaking Changes
+
+* The `cpp/tainted-format-string-through-global` query has been deleted. This does not lead to a loss of relevant alerts, as the query duplicated a subset of the alerts from `cpp/tainted-format-string`.
+
+### New Queries
+
+* Added a new query, `cpp/use-of-string-after-lifetime-ends`, to detect calls to `c_str` on strings that will be destroyed immediately.
+
+## 0.8.3
+
+### Minor Analysis Improvements
+
+* The `cpp/uninitialized-local` query has been improved to produce fewer false positives.
+
 ## 0.8.2
 
 No user-facing changes.

cpp/ql/src/Likely Bugs/Memory Management/ReturnStackAllocatedMemory.ql

@@ -27,16 +27,26 @@ class ReturnStackAllocatedMemoryConfig extends MustFlowConfiguration {
   ReturnStackAllocatedMemoryConfig() { this = "ReturnStackAllocatedMemoryConfig" }
 
   override predicate isSource(Instruction source) {
-    // Holds if `source` is a node that represents the use of a stack variable
-    exists(VariableAddressInstruction var, Function func |
-      var = source and
-      func = source.getEnclosingFunction() and
-      var.getAstVariable() instanceof StackVariable and
-      // Pointer-to-member types aren't properly handled in the dbscheme.
-      not var.getResultType() instanceof PointerToMemberType and
+    exists(Function func |
       // Rule out FPs caused by extraction errors.
       not any(ErrorExpr e).getEnclosingFunction() = func and
-      not intentionallyReturnsStackPointer(func)
+      not intentionallyReturnsStackPointer(func) and
+      func = source.getEnclosingFunction()
+    |
+      // `source` is an instruction that represents the use of a stack variable
+      exists(VariableAddressInstruction var |
+        var = source and
+        var.getAstVariable() instanceof StackVariable and
+        // Pointer-to-member types aren't properly handled in the dbscheme.
+        not var.getResultType() instanceof PointerToMemberType
+      )
+      or
+      // `source` is an instruction that represents the return value of a
+      // function that is known to return stack-allocated memory.
+      exists(Call call |
+        call.getTarget().hasGlobalName(["alloca", "strdupa", "strndupa", "_alloca", "_malloca"]) and
+        source.getUnconvertedResultExpression() = call
+      )
     )
   }
 
@@ -85,10 +95,10 @@ class ReturnStackAllocatedMemoryConfig extends MustFlowConfiguration {
 }
 
 from
-  MustFlowPathNode source, MustFlowPathNode sink, VariableAddressInstruction var,
+  MustFlowPathNode source, MustFlowPathNode sink, Instruction instr,
   ReturnStackAllocatedMemoryConfig conf
 where
   conf.hasFlowPath(pragma[only_bind_into](source), pragma[only_bind_into](sink)) and
-  source.getInstruction() = var
+  source.getInstruction() = instr
 select sink.getInstruction(), source, sink, "May return stack-allocated memory from $@.",
-  var.getAst(), var.getAst().toString()
+  instr.getAst(), instr.getAst().toString()

cpp/ql/src/Security/CWE/CWE-114/UncontrolledProcessOperation.ql

@@ -14,25 +14,44 @@
 
 import cpp
 import semmle.code.cpp.security.Security
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
+import semmle.code.cpp.security.FlowSources
+import semmle.code.cpp.ir.dataflow.TaintTracking
+import semmle.code.cpp.ir.IR
+import Flow::PathGraph
 
-predicate isProcessOperationExplanation(Expr arg, string processOperation) {
+predicate isProcessOperationExplanation(DataFlow::Node arg, string processOperation) {
   exists(int processOperationArg, FunctionCall call |
     isProcessOperationArgument(processOperation, processOperationArg) and
     call.getTarget().getName() = processOperation and
-    call.getArgument(processOperationArg) = arg
+    call.getArgument(processOperationArg) = [arg.asExpr(), arg.asIndirectExpr()]
   )
 }
 
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element arg) { isProcessOperationExplanation(arg, _) }
+predicate isSource(FlowSource source, string sourceType) { sourceType = source.getSourceType() }
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node node) { isSource(node, _) }
+
+  predicate isSink(DataFlow::Node node) { isProcessOperationExplanation(node, _) }
+
+  predicate isBarrier(DataFlow::Node node) {
+    isSink(node) and node.asExpr().getUnspecifiedType() instanceof ArithmeticType
+    or
+    node.asInstruction().(StoreInstruction).getResultType() instanceof ArithmeticType
+  }
 }
 
-from string processOperation, Expr arg, Expr source, PathNode sourceNode, PathNode sinkNode
+module Flow = TaintTracking::Global<Config>;
+
+from
+  string processOperation, string sourceType, DataFlow::Node source, DataFlow::Node sink,
+  Flow::PathNode sourceNode, Flow::PathNode sinkNode
 where
-  isProcessOperationExplanation(arg, processOperation) and
-  taintedWithPath(source, arg, sourceNode, sinkNode)
-select arg, sourceNode, sinkNode,
+  source = sourceNode.getNode() and
+  sink = sinkNode.getNode() and
+  isSource(source, sourceType) and
+  isProcessOperationExplanation(sink, processOperation) and
+  Flow::flowPath(sourceNode, sinkNode)
+select sink, sourceNode, sinkNode,
   "The value of this argument may come from $@ and is being passed to " + processOperation + ".",
-  source, source.toString()
+  source, sourceType

cpp/ql/src/Security/CWE/CWE-120/UnboundedWrite.ql

@@ -52,16 +52,17 @@ predicate isUnboundedWrite(BufferWrite bw) {
  * Holds if `e` is a source buffer going into an unbounded write `bw` or a
  * qualifier of (a qualifier of ...) such a source.
  */
-predicate unboundedWriteSource(Expr e, BufferWrite bw) {
-  isUnboundedWrite(bw) and e = bw.getASource()
+predicate unboundedWriteSource(Expr e, BufferWrite bw, boolean qualifier) {
+  isUnboundedWrite(bw) and e = bw.getASource() and qualifier = false
   or
-  exists(FieldAccess fa | unboundedWriteSource(fa, bw) and e = fa.getQualifier())
+  exists(FieldAccess fa | unboundedWriteSource(fa, bw, _) and e = fa.getQualifier()) and
+  qualifier = true
 }
 
 predicate isSource(FS::FlowSource source, string sourceType) { source.getSourceType() = sourceType }
 
-predicate isSink(DataFlow::Node sink, BufferWrite bw) {
-  unboundedWriteSource(sink.asIndirectExpr(), bw)
+predicate isSink(DataFlow::Node sink, BufferWrite bw, boolean qualifier) {
+  unboundedWriteSource(sink.asIndirectExpr(), bw, qualifier)
   or
   // `gets` and `scanf` reads from stdin so there's no real input.
   // The `BufferWrite` library models this as the call itself being
@@ -69,7 +70,7 @@ predicate isSink(DataFlow::Node sink, BufferWrite bw) {
   // the sink so that we report a path where source = sink (because
   // the same output argument is also included in `isSource`).
   bw.getASource() = bw and
-  unboundedWriteSource(sink.asDefiningArgument(), bw)
+  unboundedWriteSource(sink.asDefiningArgument(), bw, qualifier)
 }
 
 predicate lessThanOrEqual(IRGuardCondition g, Expr e, boolean branch) {
@@ -84,9 +85,9 @@ predicate lessThanOrEqual(IRGuardCondition g, Expr e, boolean branch) {
 module Config implements DataFlow::ConfigSig {
   predicate isSource(DataFlow::Node source) { isSource(source, _) }
 
-  predicate isSink(DataFlow::Node sink) { isSink(sink, _) }
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _, _) }
 
-  predicate isBarrierOut(DataFlow::Node node) { isSink(node) }
+  predicate isBarrierOut(DataFlow::Node node) { isSink(node, _, false) }
 
   predicate isBarrier(DataFlow::Node node) {
     // Block flow if the node is guarded by any <, <= or = operations.
@@ -116,7 +117,7 @@ from BufferWrite bw, Flow::PathNode source, Flow::PathNode sink, string sourceTy
 where
   Flow::flowPath(source, sink) and
   isSource(source.getNode(), sourceType) and
-  isSink(sink.getNode(), bw)
+  isSink(sink.getNode(), bw, _)
 select bw, source, sink,
   "This '" + bw.getBWDesc() + "' with input from $@ may overflow the destination.",
   source.getNode(), sourceType

cpp/ql/src/Security/CWE/CWE-134/UncontrolledFormatString.ql

@@ -16,22 +16,47 @@
 import cpp
 import semmle.code.cpp.security.Security
 import semmle.code.cpp.security.FunctionWithWrappers
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
+import semmle.code.cpp.security.FlowSources
+import semmle.code.cpp.ir.dataflow.TaintTracking
+import semmle.code.cpp.ir.IR
+import Flow::PathGraph
 
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element tainted) {
-    exists(PrintfLikeFunction printf | printf.outermostWrapperFunctionCall(tainted, _))
+predicate isSource(FlowSource source, string sourceType) { sourceType = source.getSourceType() }
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node node) { isSource(node, _) }
+
+  predicate isSink(DataFlow::Node node) {
+    exists(PrintfLikeFunction printf |
+      printf.outermostWrapperFunctionCall([node.asExpr(), node.asIndirectExpr()], _)
+    )
+  }
+
+  private predicate isArithmeticNonCharType(ArithmeticType type) {
+    not type instanceof CharType and
+    not type instanceof Char8Type and
+    not type instanceof Char16Type and
+    not type instanceof Char32Type
+  }
+
+  predicate isBarrier(DataFlow::Node node) {
+    isSink(node) and isArithmeticNonCharType(node.asExpr().getUnspecifiedType())
+    or
+    isArithmeticNonCharType(node.asInstruction().(StoreInstruction).getResultType())
   }
 }
 
+module Flow = TaintTracking::Global<Config>;
+
 from
-  PrintfLikeFunction printf, Expr arg, PathNode sourceNode, PathNode sinkNode,
-  string printfFunction, Expr userValue, string cause
+  PrintfLikeFunction printf, string printfFunction, string sourceType, DataFlow::Node source,
+  DataFlow::Node sink, Flow::PathNode sourceNode, Flow::PathNode sinkNode
 where
-  printf.outermostWrapperFunctionCall(arg, printfFunction) and
-  taintedWithPath(userValue, arg, sourceNode, sinkNode) and
-  isUserInput(userValue, cause)
-select arg, sourceNode, sinkNode,
+  source = sourceNode.getNode() and
+  sink = sinkNode.getNode() and
+  isSource(source, sourceType) and
+  printf.outermostWrapperFunctionCall([sink.asExpr(), sink.asIndirectExpr()], printfFunction) and
+  Flow::flowPath(sourceNode, sinkNode)
+select sink, sourceNode, sinkNode,
   "The value of this argument may come from $@ and is being used as a formatting argument to " +
-    printfFunction + ".", userValue, cause
+    printfFunction + ".", source, sourceType

cpp/ql/src/Security/CWE/CWE-134/UncontrolledFormatStringThroughGlobalVar.c

@@ -1,24 +0,0 @@
-#include <stdio.h>
-
-char *copy;
-
-void copyArgv(char **argv) {
-	copy = argv[1];
-}
-
-void printWrapper(char *str) {
-	printf(str);
-}
-
-int main(int argc, char **argv) {
-	copyArgv(argv);
-
-	// This should be avoided
-	printf(copy);
-
-	// This should be avoided too, because it has the same effect
-	printWrapper(copy);
-
-	// This is fine
-	printf("%s", copy);
-}

cpp/ql/src/Security/CWE/CWE-134/UncontrolledFormatStringThroughGlobalVar.qhelp

@@ -1,36 +0,0 @@
-<!DOCTYPE qhelp PUBLIC
-  "-//Semmle//qhelp//EN"
-  "qhelp.dtd">
-<qhelp>
-<overview>
-<p>The program uses input from the user, propagated via a global variable, as a format string for <code>printf</code> style functions. 
-This can lead to buffer overflows or data representation problems. An attacker can exploit this weakness to crash the program, 
-disclose information or even execute arbitrary code.</p>
-
-<p>This rule only identifies inputs from the user that are transferred through global variables before being used in <code>printf</code> style functions.
-Analyzing the flow of data through global variables is more prone to errors and so this rule may identify some examples of code where 
-the input is not really from the user. For example, when a global variable is set in two places, one that comes from the user and one that does not.
-In this case we would mark all usages of the global variable as input from the user, but the input from the user may always came after the call to the
-<code>printf</code> style functions.</p>
-
-<p>The results of this rule should be considered alongside the related rule "Uncontrolled format string" which tracks the flow of the 
-values input by a user, excluding global variables, until the values are used as the format argument for a <code>printf</code> like function call.</p>
-
-</overview>
-<recommendation>
-<p>Use constant expressions as the format strings. If you need to print a value from the user, use <code>printf("%s", value_from_user)</code>.</p>
-
-</recommendation>
-<example>
-<sample src="UncontrolledFormatStringThroughGlobalVar.c" />
-
-</example>
-<references>
-
-<li>CERT C Coding
-Standard: <a href="https://www.securecoding.cert.org/confluence/display/c/FIO30-C.+Exclude+user+input+from+format+strings">FIO30-C. Exclude
-user input from format strings</a>.</li>
-
-
-</references>
-</qhelp>

cpp/ql/src/Security/CWE/CWE-134/UncontrolledFormatStringThroughGlobalVar.ql

@@ -1,40 +0,0 @@
-/**
- * @name Uncontrolled format string (through global variable)
- * @description Using externally-controlled format strings in
- *              printf-style functions can lead to buffer overflows
- *              or data representation problems.
- * @kind path-problem
- * @problem.severity warning
- * @security-severity 9.3
- * @precision high
- * @id cpp/tainted-format-string-through-global
- * @tags reliability
- *       security
- *       external/cwe/cwe-134
- */
-
-import cpp
-import semmle.code.cpp.security.FunctionWithWrappers
-import semmle.code.cpp.security.Security
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
-
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element tainted) {
-    exists(PrintfLikeFunction printf | printf.outermostWrapperFunctionCall(tainted, _))
-  }
-
-  override predicate taintThroughGlobals() { any() }
-}
-
-from
-  PrintfLikeFunction printf, Expr arg, PathNode sourceNode, PathNode sinkNode,
-  string printfFunction, Expr userValue, string cause
-where
-  printf.outermostWrapperFunctionCall(arg, printfFunction) and
-  not taintedWithoutGlobals(arg) and
-  taintedWithPath(userValue, arg, sourceNode, sinkNode) and
-  isUserInput(userValue, cause)
-select arg, sourceNode, sinkNode,
-  "The value of this argument may come from $@ and is being used as a formatting argument to " +
-    printfFunction + ".", userValue, cause

cpp/ql/src/Security/CWE/CWE-170/ImproperNullTerminationTainted.ql

@@ -12,79 +12,44 @@
 
 import cpp
 import semmle.code.cpp.commons.NullTermination
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
+import semmle.code.cpp.security.FlowSources as FS
+import semmle.code.cpp.dataflow.new.TaintTracking
+import semmle.code.cpp.ir.IR
 
-/** A user-controlled expression that may not be null terminated. */
-class TaintSource extends VariableAccess {
-  TaintSource() {
-    exists(SecurityOptions x, string cause |
-      this.getTarget() instanceof SemanticStackVariable and
-      x.isUserInput(this, cause)
-    |
-      cause = ["read", "fread", "recv", "recvfrom", "recvmsg"]
-    )
-  }
-
-  /**
-   * Holds if `sink` is a tainted variable access that must be null
-   * terminated.
-   */
-  private predicate isSink(VariableAccess sink) {
-    tainted(this, sink) and
-    variableMustBeNullTerminated(sink)
-  }
-
-  /**
-   * Holds if this source can reach `va`, possibly using intermediate
-   * reassignments.
-   */
-  private predicate sourceReaches(VariableAccess va) {
-    definitionUsePair(_, this, va)
-    or
-    exists(VariableAccess mid, Expr def |
-      this.sourceReaches(mid) and
-      exprDefinition(_, def, mid) and
-      definitionUsePair(_, def, va)
-    )
-  }
-
-  /**
-   * Holds if the sink `sink` is reachable both from this source and
-   * from `va`, possibly using intermediate reassignments.
-   */
-  private predicate reachesSink(VariableAccess va, VariableAccess sink) {
-    this.isSink(sink) and
-    va = sink
-    or
-    exists(VariableAccess mid, Expr def |
-      this.reachesSink(mid, sink) and
-      exprDefinition(_, def, va) and
-      definitionUsePair(_, def, mid)
-    )
-  }
-
-  /**
-   * Holds if `sink` is a tainted variable access that must be null
-   * terminated, and no access which null terminates its contents can
-   * either reach the sink or be reached from the source. (Ideally,
-   * we should instead look for such accesses only on the path from
-   * this source to `sink` found via `tainted(source, sink)`.)
-   */
-  predicate reaches(VariableAccess sink) {
-    this.isSink(sink) and
-    not exists(VariableAccess va |
-      va != this and
-      va != sink and
-      mayAddNullTerminator(_, va)
-    |
-      this.sourceReaches(va)
-      or
-      this.reachesSink(va, sink)
-    )
-  }
+predicate isSource(FS::FlowSource source, string sourceType) {
+  sourceType = source.getSourceType() and
+  exists(VariableAccess va, Call call |
+    va = source.asDefiningArgument() and
+    call.getAnArgument() = va and
+    va.getTarget() instanceof SemanticStackVariable and
+    call.getTarget().hasGlobalName(["read", "fread", "recv", "recvfrom", "recvmsg"])
+  )
 }
 
-from TaintSource source, VariableAccess sink
-where source.reaches(sink)
-select sink, "String operation depends on a $@ that may not be null terminated.", source,
-  "user-provided value"
+predicate isSink(DataFlow::Node sink, VariableAccess va) {
+  va = [sink.asExpr(), sink.asIndirectExpr()] and
+  variableMustBeNullTerminated(va)
+}
+
+private module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { isSource(source, _) }
+
+  predicate isBarrier(DataFlow::Node node) {
+    isSink(node) and node.asExpr().getUnspecifiedType() instanceof ArithmeticType
+    or
+    node.asInstruction().(StoreInstruction).getResultType() instanceof ArithmeticType
+    or
+    mayAddNullTerminator(_, node.asIndirectExpr())
+  }
+
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _) }
+}
+
+module Flow = TaintTracking::Global<Config>;
+
+from DataFlow::Node source, DataFlow::Node sink, VariableAccess va, string sourceType
+where
+  Flow::flow(source, sink) and
+  isSource(source, sourceType) and
+  isSink(sink, va)
+select va, "String operation depends on $@ that may not be null terminated.", source, sourceType

cpp/ql/src/Security/CWE/CWE-190/ArithmeticTainted.ql

@@ -14,10 +14,13 @@
 
 import cpp
 import semmle.code.cpp.security.Overflow
-import semmle.code.cpp.security.Security
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
+import semmle.code.cpp.dataflow.new.TaintTracking
+import semmle.code.cpp.dataflow.new.DataFlow
+import semmle.code.cpp.ir.IR
+import semmle.code.cpp.controlflow.IRGuards as IRGuards
+import semmle.code.cpp.security.FlowSources as FS
 import Bounded
+import Flow::PathGraph
 
 bindingset[op]
 predicate missingGuard(Operation op, Expr e, string effect) {
@@ -28,28 +31,90 @@ predicate missingGuard(Operation op, Expr e, string effect) {
   not e instanceof VariableAccess and effect = "overflow"
 }
 
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element e) {
-    exists(Operation op |
-      missingGuard(op, e, _) and
-      op.getAnOperand() = e
-    |
-      op instanceof UnaryArithmeticOperation or
-      op instanceof BinaryArithmeticOperation or
-      op instanceof AssignArithmeticOperation
-    )
-  }
+predicate isSource(FS::FlowSource source, string sourceType) { sourceType = source.getSourceType() }
 
-  override predicate isBarrier(Expr e) {
-    super.isBarrier(e) or bounded(e) or e.getUnspecifiedType().(IntegralType).getSize() <= 1
+predicate isSink(DataFlow::Node sink, Operation op, Expr e) {
+  e = sink.asExpr() and
+  missingGuard(op, e, _) and
+  op.getAnOperand() = e and
+  (
+    op instanceof UnaryArithmeticOperation or
+    op instanceof BinaryArithmeticOperation or
+    op instanceof AssignArithmeticOperation
+  )
+}
+
+predicate hasUpperBoundsCheck(Variable var) {
+  exists(RelationalOperation oper, VariableAccess access |
+    oper.getAnOperand() = access and
+    access.getTarget() = var and
+    // Comparing to 0 is not an upper bound check
+    not oper.getAnOperand().getValue() = "0"
+  )
+}
+
+predicate constantInstruction(Instruction instr) {
+  instr instanceof ConstantInstruction or
+  constantInstruction(instr.(UnaryInstruction).getUnary())
+}
+
+predicate readsVariable(LoadInstruction load, Variable var) {
+  load.getSourceAddress().(VariableAddressInstruction).getAstVariable() = var
+}
+
+predicate nodeIsBarrierEqualityCandidate(DataFlow::Node node, Operand access, Variable checkedVar) {
+  exists(Instruction instr | instr = node.asInstruction() |
+    readsVariable(instr, checkedVar) and
+    any(IRGuards::IRGuardCondition guard).ensuresEq(access, _, _, instr.getBlock(), true)
+  )
+}
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { isSource(source, _) }
+
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _, _) }
+
+  predicate isBarrier(DataFlow::Node node) {
+    exists(StoreInstruction store | store = node.asInstruction() |
+      // Block flow to "likely small expressions"
+      bounded(store.getSourceValue().getUnconvertedResultExpression())
+      or
+      // Block flow to "small types"
+      store.getResultType().getUnspecifiedType().(IntegralType).getSize() <= 1
+    )
+    or
+    // Block flow if there's an upper bound check of the variable anywhere in the program
+    exists(Variable checkedVar, Instruction instr | instr = node.asInstruction() |
+      readsVariable(instr, checkedVar) and
+      hasUpperBoundsCheck(checkedVar)
+    )
+    or
+    // Block flow if the node is guarded by an equality check
+    exists(Variable checkedVar, Operand access |
+      nodeIsBarrierEqualityCandidate(node, access, checkedVar) and
+      readsVariable(access.getDef(), checkedVar)
+    )
+    or
+    // Block flow to any binary instruction whose operands are both non-constants.
+    exists(BinaryInstruction iTo |
+      iTo = node.asInstruction() and
+      not constantInstruction(iTo.getLeft()) and
+      not constantInstruction(iTo.getRight()) and
+      // propagate taint from either the pointer or the offset, regardless of constantness
+      not iTo instanceof PointerArithmeticInstruction
+    )
   }
 }
 
-from Expr origin, Expr e, string effect, PathNode sourceNode, PathNode sinkNode, Operation op
+module Flow = TaintTracking::Global<Config>;
+
+from
+  Expr e, string effect, Flow::PathNode source, Flow::PathNode sink, Operation op, string sourceType
 where
-  taintedWithPath(origin, e, sourceNode, sinkNode) and
-  op.getAnOperand() = e and
+  Flow::flowPath(source, sink) and
+  isSource(source.getNode(), sourceType) and
+  isSink(sink.getNode(), op, e) and
   missingGuard(op, e, effect)
-select e, sourceNode, sinkNode,
+select e, source, sink,
   "$@ flows to an operand of an arithmetic expression, potentially causing an " + effect + ".",
-  origin, "User-provided value"
+  source, sourceType

cpp/ql/src/Security/CWE/CWE-190/ArithmeticWithExtremeValues.ql

@@ -16,45 +16,30 @@
 
 import cpp
 import semmle.code.cpp.security.Overflow
-import semmle.code.cpp.security.Security
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
+import semmle.code.cpp.dataflow.new.TaintTracking
+import semmle.code.cpp.ir.IR
+import semmle.code.cpp.controlflow.IRGuards as IRGuards
 
 predicate isMaxValue(Expr mie) {
   exists(MacroInvocation mi |
     mi.getExpr() = mie and
-    (
-      mi.getMacroName() = "CHAR_MAX" or
-      mi.getMacroName() = "LLONG_MAX" or
-      mi.getMacroName() = "INT_MAX" or
-      mi.getMacroName() = "SHRT_MAX" or
-      mi.getMacroName() = "UINT_MAX"
-    )
+    mi.getMacroName() = ["CHAR_MAX", "LLONG_MAX", "INT_MAX", "SHRT_MAX", "UINT_MAX"]
   )
 }
 
 predicate isMinValue(Expr mie) {
   exists(MacroInvocation mi |
     mi.getExpr() = mie and
-    (
-      mi.getMacroName() = "CHAR_MIN" or
-      mi.getMacroName() = "LLONG_MIN" or
-      mi.getMacroName() = "INT_MIN" or
-      mi.getMacroName() = "SHRT_MIN"
-    )
+    mi.getMacroName() = ["CHAR_MIN", "LLONG_MIN", "INT_MIN", "SHRT_MIN"]
   )
 }
 
-class SecurityOptionsArith extends SecurityOptions {
-  override predicate isUserInput(Expr expr, string cause) {
+predicate isSource(DataFlow::Node source, string cause) {
+  exists(Expr expr | expr = source.asExpr() |
     isMaxValue(expr) and cause = "max value"
     or
     isMinValue(expr) and cause = "min value"
-  }
-}
-
-predicate taintedVarAccess(Expr origin, VariableAccess va, string cause) {
-  isUserInput(origin, cause) and
-  tainted(origin, va)
+  )
 }
 
 predicate causeEffectCorrespond(string cause, string effect) {
@@ -65,16 +50,79 @@ predicate causeEffectCorrespond(string cause, string effect) {
   effect = "underflow"
 }
 
-from Expr origin, Operation op, VariableAccess va, string cause, string effect
-where
-  taintedVarAccess(origin, va, cause) and
-  op.getAnOperand() = va and
-  (
+predicate isSink(DataFlow::Node sink, VariableAccess va, string effect) {
+  exists(Operation op |
+    sink.asExpr() = va and
+    op.getAnOperand() = va
+  |
     missingGuardAgainstUnderflow(op, va) and effect = "underflow"
     or
     missingGuardAgainstOverflow(op, va) and effect = "overflow"
-  ) and
-  causeEffectCorrespond(cause, effect)
+  )
+}
+
+predicate hasUpperBoundsCheck(Variable var) {
+  exists(RelationalOperation oper, VariableAccess access |
+    oper.getAnOperand() = access and
+    access.getTarget() = var and
+    // Comparing to 0 is not an upper bound check
+    not oper.getAnOperand().getValue() = "0"
+  )
+}
+
+predicate constantInstruction(Instruction instr) {
+  instr instanceof ConstantInstruction or
+  constantInstruction(instr.(UnaryInstruction).getUnary())
+}
+
+predicate readsVariable(LoadInstruction load, Variable var) {
+  load.getSourceAddress().(VariableAddressInstruction).getAstVariable() = var
+}
+
+predicate nodeIsBarrierEqualityCandidate(DataFlow::Node node, Operand access, Variable checkedVar) {
+  exists(Instruction instr | instr = node.asInstruction() |
+    readsVariable(instr, checkedVar) and
+    any(IRGuards::IRGuardCondition guard).ensuresEq(access, _, _, instr.getBlock(), true)
+  )
+}
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { isSource(source, _) }
+
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _, _) }
+
+  predicate isBarrier(DataFlow::Node node) {
+    // Block flow if there's an upper bound check of the variable anywhere in the program
+    exists(Variable checkedVar, Instruction instr | instr = node.asInstruction() |
+      readsVariable(instr, checkedVar) and
+      hasUpperBoundsCheck(checkedVar)
+    )
+    or
+    // Block flow if the node is guarded by an equality check
+    exists(Variable checkedVar, Operand access |
+      nodeIsBarrierEqualityCandidate(node, access, checkedVar) and
+      readsVariable(access.getDef(), checkedVar)
+    )
+    or
+    // Block flow to any binary instruction whose operands are both non-constants.
+    exists(BinaryInstruction iTo |
+      iTo = node.asInstruction() and
+      not constantInstruction(iTo.getLeft()) and
+      not constantInstruction(iTo.getRight()) and
+      // propagate taint from either the pointer or the offset, regardless of constantness
+      not iTo instanceof PointerArithmeticInstruction
+    )
+  }
+}
+
+module Flow = TaintTracking::Global<Config>;
+
+from DataFlow::Node source, DataFlow::Node sink, VariableAccess va, string cause, string effect
+where
+  Flow::flow(source, sink) and
+  isSource(source, cause) and
+  causeEffectCorrespond(cause, effect) and
+  isSink(sink, va, effect)
 select va,
   "$@ flows to an operand of an arithmetic expression, potentially causing an " + effect + ".",
-  origin, "Extreme value"
+  source, "Extreme value"

cpp/ql/src/Security/CWE/CWE-190/IntegerOverflowTainted.ql

@@ -15,7 +15,11 @@
 
 import cpp
 import semmle.code.cpp.rangeanalysis.SimpleRangeAnalysis
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
+import semmle.code.cpp.dataflow.new.DataFlow
+import semmle.code.cpp.security.FlowSources as FS
+import semmle.code.cpp.dataflow.new.TaintTracking
+import semmle.code.cpp.ir.IR
+import semmle.code.cpp.controlflow.IRGuards as IRGuards
 
 /** Holds if `expr` might overflow. */
 predicate outOfBoundsExpr(Expr expr, string kind) {
@@ -27,13 +31,76 @@ predicate outOfBoundsExpr(Expr expr, string kind) {
     else none()
 }
 
-from Expr use, Expr origin, string kind
+predicate isSource(FS::FlowSource source, string sourceType) { sourceType = source.getSourceType() }
+
+predicate isSink(DataFlow::Node sink, string kind) {
+  exists(Expr use |
+    use = sink.asExpr() and
+    not use.getUnspecifiedType() instanceof PointerType and
+    outOfBoundsExpr(use, kind) and
+    not inSystemMacroExpansion(use)
+  )
+}
+
+predicate hasUpperBoundsCheck(Variable var) {
+  exists(RelationalOperation oper, VariableAccess access |
+    oper.getAnOperand() = access and
+    access.getTarget() = var and
+    // Comparing to 0 is not an upper bound check
+    not oper.getAnOperand().getValue() = "0"
+  )
+}
+
+predicate constantInstruction(Instruction instr) {
+  instr instanceof ConstantInstruction or
+  constantInstruction(instr.(UnaryInstruction).getUnary())
+}
+
+predicate readsVariable(LoadInstruction load, Variable var) {
+  load.getSourceAddress().(VariableAddressInstruction).getAstVariable() = var
+}
+
+predicate nodeIsBarrierEqualityCandidate(DataFlow::Node node, Operand access, Variable checkedVar) {
+  exists(Instruction instr | instr = node.asInstruction() |
+    readsVariable(instr, checkedVar) and
+    any(IRGuards::IRGuardCondition guard).ensuresEq(access, _, _, instr.getBlock(), true)
+  )
+}
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { isSource(source, _) }
+
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _) }
+
+  predicate isBarrier(DataFlow::Node node) {
+    // Block flow if there's an upper bound check of the variable anywhere in the program
+    exists(Variable checkedVar, Instruction instr | instr = node.asInstruction() |
+      readsVariable(instr, checkedVar) and
+      hasUpperBoundsCheck(checkedVar)
+    )
+    or
+    // Block flow if the node is guarded by an equality check
+    exists(Variable checkedVar, Operand access |
+      nodeIsBarrierEqualityCandidate(node, access, checkedVar) and
+      readsVariable(access.getDef(), checkedVar)
+    )
+    or
+    // Block flow to any binary instruction whose operands are both non-constants.
+    exists(BinaryInstruction iTo |
+      iTo = node.asInstruction() and
+      not constantInstruction(iTo.getLeft()) and
+      not constantInstruction(iTo.getRight()) and
+      // propagate taint from either the pointer or the offset, regardless of constantness
+      not iTo instanceof PointerArithmeticInstruction
+    )
+  }
+}
+
+module Flow = TaintTracking::Global<Config>;
+
+from DataFlow::Node source, DataFlow::Node sink, string kind, string sourceType
 where
-  not use.getUnspecifiedType() instanceof PointerType and
-  outOfBoundsExpr(use, kind) and
-  tainted(origin, use) and
-  origin != use and
-  not inSystemMacroExpansion(use) and
-  // Avoid double-counting: don't include all the conversions of `use`.
-  not use instanceof Conversion
-select use, "$@ flows an expression which might " + kind + ".", origin, "User-provided value"
+  Flow::flow(source, sink) and
+  isSource(source, sourceType) and
+  isSink(sink, kind)
+select sink, "$@ flows an expression which might " + kind + ".", source, sourceType

cpp/ql/src/Security/CWE/CWE-290/AuthenticationBypass.ql

@@ -12,8 +12,10 @@
  *       external/cwe/cwe-290
  */
 
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
+import cpp
+import semmle.code.cpp.dataflow.new.TaintTracking
+import semmle.code.cpp.security.FlowSources as FS
+import Flow::PathGraph
 
 string getATopLevelDomain() {
   result =
@@ -60,13 +62,26 @@ predicate hardCodedAddressInCondition(Expr subexpression, Expr condition) {
   condition = any(IfStmt ifStmt).getCondition()
 }
 
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element sink) { hardCodedAddressInCondition(sink, _) }
+predicate isSource(FS::FlowSource source, string sourceType) { source.getSourceType() = sourceType }
+
+predicate isSink(DataFlow::Node sink, Expr condition) {
+  hardCodedAddressInCondition([sink.asExpr(), sink.asIndirectExpr()], condition)
 }
 
-from Expr subexpression, Expr source, Expr condition, PathNode sourceNode, PathNode sinkNode
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { isSource(source, _) }
+
+  predicate isSink(DataFlow::Node sink) { isSink(sink, _) }
+}
+
+module Flow = TaintTracking::Global<Config>;
+
+from
+  Expr subexpression, Expr condition, Flow::PathNode source, Flow::PathNode sink, string sourceType
 where
   hardCodedAddressInCondition(subexpression, condition) and
-  taintedWithPath(source, subexpression, sourceNode, sinkNode)
-select condition, sourceNode, sinkNode,
-  "Untrusted input $@ might be vulnerable to a spoofing attack.", source, source.toString()
+  isSource(source.getNode(), sourceType) and
+  Flow::flowPath(source, sink) and
+  isSink(sink.getNode(), condition)
+select condition, source, sink, "Untrusted input $@ might be vulnerable to a spoofing attack.",
+  source, sourceType

cpp/ql/src/Security/CWE/CWE-416/UseOfStringAfterLifetimeEnds.qhelp

@@ -0,0 +1,44 @@
+<!DOCTYPE qhelp PUBLIC
+  "-//Semmle//qhelp//EN"
+  "qhelp.dtd">
+<qhelp>
+
+<overview>
+<p>Calling <code>c_str</code> on a <code>std::string</code> object returns a pointer to the underlying character array.
+When the <code>std::string</code> object is destroyed, the pointer returned by <code>c_str</code> is no
+longer valid. If the pointer is used after the <code>std::string</code> object is destroyed, then the behavior is undefined.
+</p>
+</overview>
+
+<recommendation>
+<p>
+Ensure that the pointer returned by <code>c_str</code> does not outlive the underlying <code>std::string</code> object.
+</p>
+</recommendation>
+
+<example>
+<p>
+The following example concatenates two <code>std::string</code> objects, and then converts the resulting string to a
+C string using <code>c_str</code> so that it can be passed to the <code>work</code> function.
+
+However, the underlying <code>std::string</code> object that represents the concatenated string is destroyed as soon as the call
+to <code>c_str</code> returns. This means that <code>work</code> is given a pointer to invalid memory.
+</p>
+
+<sample src="UseOfStringAfterLifetimeEndsBad.cpp" />
+
+<p>
+The following example fixes the above code by ensuring that the pointer returned by the call to <code>c_str</code> does
+not outlive the underlying <code>std::string</code> objects. This ensures that the pointer passed to <code>work</code>
+points to valid memory.
+</p>
+
+<sample src="UseOfStringAfterLifetimeEndsGood.cpp" />
+
+</example>
+<references>
+
+<li><a href="https://wiki.sei.cmu.edu/confluence/display/cplusplus/MEM50-CPP.+Do+not+access+freed+memory">MEM50-CPP. Do not access freed memory</a>.</li>
+
+</references>
+</qhelp>

cpp/ql/src/Security/CWE/CWE-416/UseOfStringAfterLifetimeEnds.ql

@@ -0,0 +1,100 @@
+/**
+ * @name Use of string after lifetime ends
+ * @description If the value of a call to 'c_str' outlives the underlying object it may lead to unexpected behavior.
+ * @kind problem
+ * @precision high
+ * @id cpp/use-of-string-after-lifetime-ends
+ * @problem.severity warning
+ * @security-severity 8.8
+ * @tags reliability
+ *       security
+ *       external/cwe/cwe-416
+ *       external/cwe/cwe-664
+ */
+
+import cpp
+import semmle.code.cpp.models.implementations.StdString
+import semmle.code.cpp.models.implementations.StdContainer
+
+/**
+ * Holds if `e` will be consumed by its parent as a glvalue and does not have
+ * an lvalue-to-rvalue conversion. This means that it will be materialized into
+ * a temporary object.
+ */
+predicate isTemporary(Expr e) {
+  e instanceof TemporaryObjectExpr
+  or
+  e.isPRValueCategory() and
+  e.getUnspecifiedType() instanceof Class and
+  not e.hasLValueToRValueConversion()
+}
+
+/** Holds if `e` is written to a container. */
+predicate isStoredInContainer(Expr e) {
+  exists(StdSequenceContainerInsert insert, Call call, int index |
+    call = insert.getACallToThisFunction() and
+    index = insert.getAValueTypeParameterIndex() and
+    call.getArgument(index) = e
+  )
+  or
+  exists(StdSequenceContainerPush push, Call call, int index |
+    call = push.getACallToThisFunction() and
+    index = push.getAValueTypeParameterIndex() and
+    call.getArgument(index) = e
+  )
+  or
+  exists(StdSequenceEmplace emplace, Call call, int index |
+    call = emplace.getACallToThisFunction() and
+    index = emplace.getAValueTypeParameterIndex() and
+    call.getArgument(index) = e
+  )
+  or
+  exists(StdSequenceEmplaceBack emplaceBack, Call call, int index |
+    call = emplaceBack.getACallToThisFunction() and
+    index = emplaceBack.getAValueTypeParameterIndex() and
+    call.getArgument(index) = e
+  )
+}
+
+/**
+ * Holds if the value of `e` outlives the enclosing full expression. For
+ * example, because the value is stored in a local variable.
+ */
+predicate outlivesFullExpr(Expr e) {
+  any(Assignment assign).getRValue() = e
+  or
+  any(Variable v).getInitializer().getExpr() = e
+  or
+  any(ReturnStmt ret).getExpr() = e
+  or
+  exists(ConditionalExpr cond |
+    outlivesFullExpr(cond) and
+    [cond.getThen(), cond.getElse()] = e
+  )
+  or
+  exists(BinaryOperation bin |
+    outlivesFullExpr(bin) and
+    bin.getAnOperand() = e
+  )
+  or
+  exists(ClassAggregateLiteral aggr |
+    outlivesFullExpr(aggr) and
+    aggr.getAFieldExpr(_) = e
+  )
+  or
+  exists(ArrayAggregateLiteral aggr |
+    outlivesFullExpr(aggr) and
+    aggr.getAnElementExpr(_) = e
+  )
+  or
+  isStoredInContainer(e)
+}
+
+from Call c
+where
+  outlivesFullExpr(c) and
+  not c.isFromUninstantiatedTemplate(_) and
+  (c.getTarget() instanceof StdStringCStr or c.getTarget() instanceof StdStringData) and
+  isTemporary(c.getQualifier().getFullyConverted())
+select c,
+  "The underlying string object is destroyed after the call to '" + c.getTarget() + "' returns."

cpp/ql/src/Security/CWE/CWE-416/UseOfStringAfterLifetimeEndsBad.cpp

@@ -0,0 +1,9 @@
+#include <string>
+void work(const char*);
+
+// BAD: the concatenated string is deallocated when `c_str` returns. So `work`
+// is given a pointer to invalid memory.
+void work_with_combined_string_bad(std::string s1, std::string s2) {
+  const char* combined_string = (s1 + s2).c_str();
+  work(combined_string);
+}

cpp/ql/src/Security/CWE/CWE-416/UseOfStringAfterLifetimeEndsGood.cpp

@@ -0,0 +1,9 @@
+#include <string>
+void work(const char*);
+
+// GOOD: the concatenated string outlives the call to `work`. So the pointer
+// obtainted from `c_str` is valid.
+void work_with_combined_string_good(std::string s1, std::string s2) {
+  auto combined_string = s1 + s2;
+  work(combined_string.c_str());
+}

cpp/ql/src/Security/CWE/CWE-807/TaintedCondition.ql

@@ -12,8 +12,12 @@
  *       external/cwe/cwe-807
  */
 
-import semmle.code.cpp.ir.dataflow.internal.DefaultTaintTrackingImpl
-import TaintedWithPath
+import cpp
+import semmle.code.cpp.security.Security
+import semmle.code.cpp.security.FlowSources
+import semmle.code.cpp.ir.dataflow.TaintTracking
+import semmle.code.cpp.ir.IR
+import Flow::PathGraph
 
 predicate sensitiveCondition(Expr condition, Expr raise) {
   raisesPrivilege(raise) and
@@ -23,19 +27,62 @@ predicate sensitiveCondition(Expr condition, Expr raise) {
   )
 }
 
-class Configuration extends TaintTrackingConfiguration {
-  override predicate isSink(Element tainted) { sensitiveCondition(tainted, _) }
+private predicate constantInstruction(Instruction instr) {
+  instr instanceof ConstantInstruction
+  or
+  instr instanceof StringConstantInstruction
+  or
+  constantInstruction(instr.(UnaryInstruction).getUnary())
 }
 
+predicate isSource(FlowSource source, string sourceType) { sourceType = source.getSourceType() }
+
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node node) { isSource(node, _) }
+
+  predicate isSink(DataFlow::Node node) {
+    sensitiveCondition([node.asExpr(), node.asIndirectExpr()], _)
+  }
+
+  predicate isBarrier(DataFlow::Node node) {
+    // Block flow into binary instructions if both operands are non-constant
+    exists(BinaryInstruction iTo |
+      iTo = node.asInstruction() and
+      not constantInstruction(iTo.getLeft()) and
+      not constantInstruction(iTo.getRight()) and
+      // propagate taint from either the pointer or the offset, regardless of constant-ness
+      not iTo instanceof PointerArithmeticInstruction
+    )
+    or
+    // Block flow through calls to pure functions if two or more operands are non-constant
+    exists(Instruction iFrom1, Instruction iFrom2, CallInstruction iTo |
+      iTo = node.asInstruction() and
+      isPureFunction(iTo.getStaticCallTarget().getName()) and
+      iFrom1 = iTo.getAnArgument() and
+      iFrom2 = iTo.getAnArgument() and
+      not constantInstruction(iFrom1) and
+      not constantInstruction(iFrom2) and
+      iFrom1 != iFrom2
+    )
+  }
+}
+
+module Flow = TaintTracking::Global<Config>;
+
 /*
  * Produce an alert if there is an 'if' statement whose condition `condition`
  * is influenced by tainted data `source`, and the body contains
  * `raise` which escalates privilege.
  */
 
-from Expr source, Expr condition, Expr raise, PathNode sourceNode, PathNode sinkNode
+from
+  Expr raise, string sourceType, DataFlow::Node source, DataFlow::Node sink,
+  Flow::PathNode sourceNode, Flow::PathNode sinkNode
 where
-  taintedWithPath(source, condition, sourceNode, sinkNode) and
-  sensitiveCondition(condition, raise)
-select condition, sourceNode, sinkNode, "Reliance on untrusted input $@ to raise privilege at $@.",
-  source, source.toString(), raise, raise.toString()
+  source = sourceNode.getNode() and
+  sink = sinkNode.getNode() and
+  isSource(source, sourceType) and
+  sensitiveCondition([sink.asExpr(), sink.asIndirectExpr()], raise) and
+  Flow::flowPath(sourceNode, sinkNode)
+select sink, sourceNode, sinkNode, "Reliance on $@ to raise privilege at $@.", source, sourceType,
+  raise, raise.toString()

cpp/ql/src/Summary/LinesOfCode.ql

@@ -4,6 +4,7 @@
  * @description The total number of lines of C/C++ code across all files, including system headers, libraries, and auto-generated files. This is a useful metric of the size of a database. For all files that were seen during the build, this query counts the lines of code, excluding whitespace or comments.
  * @kind metric
  * @tags summary
+ *       telemetry
  */
 
 import cpp

cpp/ql/src/change-notes/2023-10-31-odbc-models.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Added SQL API models for `ODBC`.

cpp/ql/src/change-notes/released/0.8.3.md

@@ -1,4 +1,5 @@
----
-category: minorAnalysis
----
+## 0.8.3
+
+### Minor Analysis Improvements
+
 * The `cpp/uninitialized-local` query has been improved to produce fewer false positives.

cpp/ql/src/change-notes/released/0.9.0.md

@@ -0,0 +1,9 @@
+## 0.9.0
+
+### Breaking Changes
+
+* The `cpp/tainted-format-string-through-global` query has been deleted. This does not lead to a loss of relevant alerts, as the query duplicated a subset of the alerts from `cpp/tainted-format-string`.
+
+### New Queries
+
+* Added a new query, `cpp/use-of-string-after-lifetime-ends`, to detect calls to `c_str` on strings that will be destroyed immediately.

cpp/ql/src/codeql-pack.release.yml

@@ -1,2 +1,2 @@
 ---
-lastReleaseVersion: 0.8.2
+lastReleaseVersion: 0.9.0

cpp/ql/src/experimental/cryptography/inventory/new_models/AllAsymmetricAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/all-asymmetric-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/AllCryptoAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/all-cryptographic-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/AsymmetricEncryptionAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/all-asymmetric-encryption-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/AuthenticatedEncryptionAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/authenticated-encryption-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/BlockModeAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/block-cipher-mode
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/BlockModeKnownIVsOrNonces.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/iv-sources
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/BlockModeUnknownIVsOrNonces.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/unkown-iv-sources
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/EllipticCurveAlgorithmSize.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/elliptic-curve-key-length
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/EllipticCurveAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/elliptic-curve-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/HashingAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/hash-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/KeyExchangeAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/key-exchange
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/KnownAsymmetricKeyGeneration.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/asymmetric-key-generation
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/SigningAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/signing-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/SymmetricEncryptionAlgorithms.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/symmetric-encryption-algorithms
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/experimental/cryptography/inventory/new_models/UnknownAsymmetricKeyGeneration.ql

@@ -4,7 +4,6 @@
  * @kind problem
  * @id cpp/quantum-readiness/cbom/unkwon-asymmetric-key-generation
  * @problem.severity error
- * @precision high
  * @tags cbom
  *       cryptography
  */

cpp/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/cpp-queries
-version: 0.8.3-dev
+version: 0.9.0
 groups:
   - cpp
   - queries

cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected

@@ -450,6 +450,7 @@ irGuards
 | test.c:126:12:126:26 | Call: call to test3_condition |
 | test.c:131:7:131:7 | Load: b |
 | test.c:137:7:137:7 | Constant: 0 |
+| test.c:146:7:146:8 | LogicalNot: ! ... |
 | test.c:146:8:146:8 | Load: x |
 | test.c:152:10:152:10 | Load: x |
 | test.c:152:15:152:15 | Load: y |
@@ -640,6 +641,7 @@ irGuardsControl
 | test.c:126:12:126:26 | Call: call to test3_condition | true | 127 | 127 |
 | test.c:131:7:131:7 | Load: b | true | 132 | 132 |
 | test.c:137:7:137:7 | Constant: 0 | false | 142 | 142 |
+| test.c:146:7:146:8 | LogicalNot: ! ... | true | 147 | 147 |
 | test.c:146:8:146:8 | Load: x | false | 147 | 147 |
 | test.c:152:10:152:10 | Load: x | true | 152 | 152 |
 | test.c:152:15:152:15 | Load: y | true | 152 | 152 |

cpp/ql/test/library-tests/dataflow/dataflow-tests/TestBase.qll

@@ -0,0 +1,111 @@
+module AstTest {
+  import semmle.code.cpp.dataflow.DataFlow
+  private import semmle.code.cpp.controlflow.Guards
+
+  /**
+   * A `BarrierGuard` that stops flow to all occurrences of `x` within statement
+   * S in `if (guarded(x)) S`.
+   */
+  // This is tested in `BarrierGuard.cpp`.
+  predicate testBarrierGuard(GuardCondition g, Expr checked, boolean isTrue) {
+    g.(FunctionCall).getTarget().getName() = "guarded" and
+    checked = g.(FunctionCall).getArgument(0) and
+    isTrue = true
+  }
+
+  /** Common data flow configuration to be used by tests. */
+  module AstTestAllocationConfig implements DataFlow::ConfigSig {
+    predicate isSource(DataFlow::Node source) {
+      source.asExpr().(FunctionCall).getTarget().getName() = "source"
+      or
+      source.asParameter().getName().matches("source%")
+      or
+      source.asExpr().(FunctionCall).getTarget().getName() = "indirect_source"
+      or
+      source.(DataFlow::DefinitionByReferenceNode).getParameter().getName().matches("ref_source%")
+      or
+      // Track uninitialized variables
+      exists(source.asUninitialized())
+    }
+
+    predicate isSink(DataFlow::Node sink) {
+      exists(FunctionCall call |
+        call.getTarget().getName() = ["sink", "indirect_sink"] and
+        sink.asExpr() = call.getAnArgument()
+      )
+    }
+
+    predicate isBarrier(DataFlow::Node barrier) {
+      barrier.asExpr().(VariableAccess).getTarget().hasName("barrier") or
+      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getABarrierNode()
+    }
+  }
+
+  module AstFlow = DataFlow::Global<AstTestAllocationConfig>;
+}
+
+module IRTest {
+  private import cpp
+  import semmle.code.cpp.ir.dataflow.DataFlow
+  private import semmle.code.cpp.ir.IR
+  private import semmle.code.cpp.controlflow.IRGuards
+
+  /**
+   * A `BarrierGuard` that stops flow to all occurrences of `x` within statement
+   * S in `if (guarded(x)) S`.
+   */
+  // This is tested in `BarrierGuard.cpp`.
+  predicate testBarrierGuard(IRGuardCondition g, Expr checked, boolean isTrue) {
+    exists(Call call |
+      call = g.getUnconvertedResultExpression() and
+      call.getTarget().hasName("guarded") and
+      checked = call.getArgument(0) and
+      isTrue = true
+    )
+  }
+
+  /** Common data flow configuration to be used by tests. */
+  module IRTestAllocationConfig implements DataFlow::ConfigSig {
+    predicate isSource(DataFlow::Node source) {
+      source.asExpr().(FunctionCall).getTarget().getName() = "source"
+      or
+      source.asIndirectExpr(1).(FunctionCall).getTarget().getName() = "indirect_source"
+      or
+      source.asExpr().(StringLiteral).getValue() = "source"
+      or
+      // indirect_source(n) gives the dataflow node representing the indirect node after n dereferences.
+      exists(int n, string s |
+        n = s.regexpCapture("indirect_source\\((\\d)\\)", 1).toInt() and
+        source.asIndirectExpr(n).(StringLiteral).getValue() = s
+      )
+      or
+      source.asParameter().getName().matches("source%")
+      or
+      source.(DataFlow::DefinitionByReferenceNode).getParameter().getName().matches("ref_source%")
+      or
+      exists(source.asUninitialized())
+    }
+
+    predicate isSink(DataFlow::Node sink) {
+      exists(FunctionCall call, Expr e | e = call.getAnArgument() |
+        call.getTarget().getName() = "sink" and
+        sink.asExpr() = e
+        or
+        call.getTarget().getName() = "indirect_sink" and
+        sink.asIndirectExpr() = e
+      )
+    }
+
+    predicate isBarrier(DataFlow::Node barrier) {
+      exists(Expr barrierExpr | barrierExpr in [barrier.asExpr(), barrier.asIndirectExpr()] |
+        barrierExpr.(VariableAccess).getTarget().hasName("barrier")
+      )
+      or
+      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getABarrierNode()
+      or
+      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getAnIndirectBarrierNode()
+    }
+  }
+
+  module IRFlow = DataFlow::Global<IRTestAllocationConfig>;
+}

cpp/ql/test/library-tests/dataflow/dataflow-tests/dataflow-consistency.expected

@@ -1,5 +1,11 @@
 uniqueEnclosingCallable
+| test.cpp:864:44:864:58 | {...} | Node should have one enclosing callable but has 0. |
+| test.cpp:864:47:864:54 | call to source | Node should have one enclosing callable but has 0. |
+| test.cpp:872:46:872:51 | call to source | Node should have one enclosing callable but has 0. |
+| test.cpp:872:53:872:56 | 1 | Node should have one enclosing callable but has 0. |
 uniqueCallEnclosingCallable
+| test.cpp:864:47:864:54 | call to source | Call should have one enclosing callable but has 0. |
+| test.cpp:872:46:872:51 | call to source | Call should have one enclosing callable but has 0. |
 uniqueType
 uniqueNodeLocation
 missingLocation
@@ -24,6 +30,7 @@ argHasPostUpdate
 | lambdas.cpp:45:2:45:2 | e | ArgumentNode is missing PostUpdateNode. |
 | test.cpp:67:29:67:35 | source1 | ArgumentNode is missing PostUpdateNode. |
 | test.cpp:813:19:813:35 | * ... | ArgumentNode is missing PostUpdateNode. |
+| test.cpp:848:23:848:25 | rpx | ArgumentNode is missing PostUpdateNode. |
 postWithInFlow
 | BarrierGuard.cpp:49:6:49:6 | x [post update] | PostUpdateNode should not be the target of local flow. |
 | BarrierGuard.cpp:60:7:60:7 | x [post update] | PostUpdateNode should not be the target of local flow. |

cpp/ql/test/library-tests/dataflow/dataflow-tests/test-source-sink.expected

@@ -0,0 +1,306 @@
+WARNING: Module DataFlow has been deprecated and may be removed in future (test-source-sink.ql:3,25-42)
+WARNING: Module DataFlow has been deprecated and may be removed in future (test-source-sink.ql:3,57-74)
+astFlow
+| BarrierGuard.cpp:5:19:5:24 | source | BarrierGuard.cpp:9:10:9:15 | source |
+| BarrierGuard.cpp:13:17:13:22 | source | BarrierGuard.cpp:15:10:15:15 | source |
+| BarrierGuard.cpp:21:17:21:22 | source | BarrierGuard.cpp:25:10:25:15 | source |
+| BarrierGuard.cpp:29:16:29:21 | source | BarrierGuard.cpp:31:10:31:15 | source |
+| BarrierGuard.cpp:29:16:29:21 | source | BarrierGuard.cpp:33:10:33:15 | source |
+| BarrierGuard.cpp:49:10:49:15 | call to source | BarrierGuard.cpp:51:13:51:13 | x |
+| BarrierGuard.cpp:49:10:49:15 | call to source | BarrierGuard.cpp:53:13:53:13 | x |
+| BarrierGuard.cpp:49:10:49:15 | call to source | BarrierGuard.cpp:55:13:55:13 | x |
+| BarrierGuard.cpp:60:11:60:16 | call to source | BarrierGuard.cpp:62:14:62:14 | x |
+| BarrierGuard.cpp:60:11:60:16 | call to source | BarrierGuard.cpp:64:14:64:14 | x |
+| BarrierGuard.cpp:60:11:60:16 | call to source | BarrierGuard.cpp:66:14:66:14 | x |
+| acrossLinkTargets.cpp:19:27:19:32 | call to source | acrossLinkTargets.cpp:12:8:12:8 | x |
+| clang.cpp:12:9:12:20 | sourceArray1 | clang.cpp:18:8:18:19 | sourceArray1 |
+| clang.cpp:12:9:12:20 | sourceArray1 | clang.cpp:22:8:22:20 | & ... |
+| clang.cpp:12:9:12:20 | sourceArray1 | clang.cpp:23:17:23:29 | & ... |
+| clang.cpp:29:27:29:32 | call to source | clang.cpp:30:27:30:28 | m1 |
+| clang.cpp:29:27:29:32 | call to source | clang.cpp:31:27:31:34 | call to getFirst |
+| clang.cpp:35:32:35:37 | call to source | clang.cpp:38:10:38:11 | m2 |
+| clang.cpp:44:35:44:40 | call to source | clang.cpp:46:17:46:18 | m2 |
+| clang.cpp:51:19:51:24 | call to source | clang.cpp:52:8:52:17 | stackArray |
+| clang.cpp:51:19:51:24 | call to source | clang.cpp:53:17:53:26 | stackArray |
+| dispatch.cpp:9:37:9:42 | call to source | dispatch.cpp:35:16:35:25 | call to notSource1 |
+| dispatch.cpp:9:37:9:42 | call to source | dispatch.cpp:43:15:43:24 | call to notSource1 |
+| dispatch.cpp:10:37:10:42 | call to source | dispatch.cpp:36:16:36:25 | call to notSource2 |
+| dispatch.cpp:10:37:10:42 | call to source | dispatch.cpp:44:15:44:24 | call to notSource2 |
+| dispatch.cpp:37:19:37:24 | call to source | dispatch.cpp:11:38:11:38 | x |
+| dispatch.cpp:45:18:45:23 | call to source | dispatch.cpp:11:38:11:38 | x |
+| globals.cpp:5:17:5:22 | call to source | globals.cpp:6:10:6:14 | local |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:14:3:14:6 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:18:8:18:8 | call to operator() |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:21:3:21:6 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:29:3:29:6 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:35:8:35:8 | a |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:41:8:41:8 | a |
+| lambdas.cpp:43:7:43:12 | call to source | lambdas.cpp:46:7:46:7 | w |
+| ref.cpp:29:11:29:16 | call to source | ref.cpp:62:10:62:11 | x3 |
+| ref.cpp:53:9:53:10 | x1 | ref.cpp:56:10:56:11 | x1 |
+| ref.cpp:53:13:53:14 | x2 | ref.cpp:59:10:59:11 | x2 |
+| ref.cpp:53:17:53:18 | x3 | ref.cpp:62:10:62:11 | x3 |
+| ref.cpp:53:21:53:22 | x4 | ref.cpp:65:10:65:11 | x4 |
+| ref.cpp:55:23:55:28 | call to source | ref.cpp:56:10:56:11 | x1 |
+| ref.cpp:94:15:94:20 | call to source | ref.cpp:129:13:129:15 | val |
+| ref.cpp:109:15:109:20 | call to source | ref.cpp:132:13:132:15 | val |
+| ref.cpp:122:23:122:28 | call to source | ref.cpp:123:13:123:15 | val |
+| ref.cpp:125:19:125:24 | call to source | ref.cpp:126:13:126:15 | val |
+| self-Iterator.cpp:19:23:19:28 | call to source | self-Iterator.cpp:20:10:20:10 | x |
+| test.cpp:6:12:6:17 | call to source | test.cpp:7:8:7:9 | t1 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:9:8:9:9 | t1 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:10:8:10:9 | t2 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:15:8:15:9 | t2 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:26:8:26:9 | t1 |
+| test.cpp:35:10:35:15 | call to source | test.cpp:30:8:30:8 | t |
+| test.cpp:36:13:36:18 | call to source | test.cpp:31:8:31:8 | c |
+| test.cpp:50:14:50:19 | call to source | test.cpp:58:10:58:10 | t |
+| test.cpp:66:30:66:36 | source1 | test.cpp:71:8:71:9 | x4 |
+| test.cpp:75:7:75:8 | u1 | test.cpp:76:8:76:9 | u1 |
+| test.cpp:83:7:83:8 | u2 | test.cpp:84:8:84:18 | ... ? ... : ... |
+| test.cpp:83:7:83:8 | u2 | test.cpp:86:8:86:9 | i1 |
+| test.cpp:89:28:89:34 | source1 | test.cpp:90:8:90:14 | source1 |
+| test.cpp:100:13:100:18 | call to source | test.cpp:103:10:103:12 | ref |
+| test.cpp:138:27:138:32 | call to source | test.cpp:140:8:140:8 | y |
+| test.cpp:151:33:151:38 | call to source | test.cpp:144:8:144:8 | s |
+| test.cpp:151:33:151:38 | call to source | test.cpp:152:8:152:8 | y |
+| test.cpp:164:34:164:39 | call to source | test.cpp:157:8:157:8 | x |
+| test.cpp:164:34:164:39 | call to source | test.cpp:165:8:165:8 | y |
+| test.cpp:171:11:171:16 | call to source | test.cpp:178:8:178:8 | y |
+| test.cpp:245:14:245:19 | call to source | test.cpp:260:12:260:12 | x |
+| test.cpp:265:22:265:27 | call to source | test.cpp:266:12:266:12 | x |
+| test.cpp:305:17:305:22 | call to source | test.cpp:289:14:289:14 | x |
+| test.cpp:314:4:314:9 | call to source | test.cpp:318:7:318:7 | x |
+| test.cpp:347:17:347:22 | call to source | test.cpp:349:10:349:18 | globalVar |
+| test.cpp:359:13:359:18 | call to source | test.cpp:365:10:365:14 | field |
+| test.cpp:373:13:373:18 | call to source | test.cpp:369:10:369:14 | field |
+| test.cpp:373:13:373:18 | call to source | test.cpp:375:10:375:14 | field |
+| test.cpp:382:48:382:54 | source1 | test.cpp:385:8:385:10 | tmp |
+| test.cpp:388:53:388:59 | source1 | test.cpp:392:8:392:10 | tmp |
+| test.cpp:388:53:388:59 | source1 | test.cpp:394:10:394:12 | tmp |
+| test.cpp:399:7:399:9 | tmp | test.cpp:401:8:401:10 | tmp |
+| test.cpp:405:7:405:9 | tmp | test.cpp:408:8:408:10 | tmp |
+| test.cpp:416:7:416:11 | local | test.cpp:418:8:418:12 | local |
+| test.cpp:417:16:417:20 | ref arg local | test.cpp:418:8:418:12 | local |
+| test.cpp:422:7:422:11 | local | test.cpp:424:8:424:12 | local |
+| test.cpp:423:20:423:25 | ref arg & ... | test.cpp:424:8:424:12 | local |
+| test.cpp:433:7:433:11 | local | test.cpp:435:8:435:12 | local |
+| test.cpp:433:7:433:11 | local | test.cpp:436:8:436:13 | * ... |
+| test.cpp:434:20:434:24 | ref arg local | test.cpp:435:8:435:12 | local |
+| test.cpp:434:20:434:24 | ref arg local | test.cpp:436:8:436:13 | * ... |
+| test.cpp:440:7:440:11 | local | test.cpp:442:8:442:12 | local |
+| test.cpp:441:18:441:23 | ref arg & ... | test.cpp:442:8:442:12 | local |
+| test.cpp:448:7:448:11 | local | test.cpp:450:8:450:12 | local |
+| test.cpp:448:7:448:11 | local | test.cpp:451:8:451:13 | * ... |
+| test.cpp:449:18:449:22 | ref arg local | test.cpp:450:8:450:12 | local |
+| test.cpp:449:18:449:22 | ref arg local | test.cpp:451:8:451:13 | * ... |
+| test.cpp:456:26:456:32 | source1 | test.cpp:457:9:457:22 | (statement expression) |
+| test.cpp:456:26:456:32 | source1 | test.cpp:468:8:468:12 | local |
+| test.cpp:472:8:472:13 | call to source | test.cpp:478:8:478:8 | x |
+| test.cpp:506:8:506:13 | call to source | test.cpp:513:8:513:8 | x |
+| test.cpp:517:7:517:16 | stackArray | test.cpp:521:8:521:20 | access to array |
+| test.cpp:519:19:519:24 | call to source | test.cpp:521:8:521:20 | access to array |
+| test.cpp:551:9:551:9 | y | test.cpp:541:10:541:10 | y |
+| test.cpp:583:11:583:16 | call to source | test.cpp:590:8:590:8 | x |
+| test.cpp:628:20:628:25 | ref arg buffer | test.cpp:629:17:629:22 | buffer |
+| test.cpp:633:18:633:23 | call to source | test.cpp:634:8:634:8 | x |
+| test.cpp:702:38:702:43 | source | test.cpp:695:8:695:10 | buf |
+| test.cpp:726:11:726:16 | call to source | test.cpp:735:8:735:8 | x |
+| test.cpp:733:7:733:7 | x | test.cpp:735:8:735:8 | x |
+| test.cpp:749:27:749:32 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:751:27:751:32 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:753:32:753:37 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:755:32:755:37 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:769:27:769:32 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:771:27:771:32 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:773:32:773:37 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:775:32:775:37 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:788:31:788:36 | call to source | test.cpp:782:12:782:12 | x |
+| test.cpp:790:31:790:36 | call to source | test.cpp:782:12:782:12 | x |
+| test.cpp:797:22:797:28 | ref arg content | test.cpp:798:19:798:25 | content |
+| test.cpp:842:11:842:16 | call to source | test.cpp:844:8:844:8 | y |
+| test.cpp:846:13:846:27 | call to indirect_source | test.cpp:848:23:848:25 | rpx |
+| test.cpp:860:54:860:59 | call to source | test.cpp:861:10:861:37 | static_local_pointer_dynamic |
+| true_upon_entry.cpp:17:11:17:16 | call to source | true_upon_entry.cpp:21:8:21:8 | x |
+| true_upon_entry.cpp:27:9:27:14 | call to source | true_upon_entry.cpp:29:8:29:8 | x |
+| true_upon_entry.cpp:33:11:33:16 | call to source | true_upon_entry.cpp:39:8:39:8 | x |
+| true_upon_entry.cpp:43:11:43:16 | call to source | true_upon_entry.cpp:49:8:49:8 | x |
+| true_upon_entry.cpp:54:11:54:16 | call to source | true_upon_entry.cpp:57:8:57:8 | x |
+| true_upon_entry.cpp:70:11:70:16 | call to source | true_upon_entry.cpp:78:8:78:8 | x |
+| true_upon_entry.cpp:83:11:83:16 | call to source | true_upon_entry.cpp:86:8:86:8 | x |
+irFlow
+| BarrierGuard.cpp:5:19:5:24 | source | BarrierGuard.cpp:9:10:9:15 | source |
+| BarrierGuard.cpp:13:17:13:22 | source | BarrierGuard.cpp:15:10:15:15 | source |
+| BarrierGuard.cpp:21:17:21:22 | source | BarrierGuard.cpp:25:10:25:15 | source |
+| BarrierGuard.cpp:29:16:29:21 | source | BarrierGuard.cpp:31:10:31:15 | source |
+| BarrierGuard.cpp:29:16:29:21 | source | BarrierGuard.cpp:33:10:33:15 | source |
+| BarrierGuard.cpp:49:10:49:15 | call to source | BarrierGuard.cpp:53:13:53:13 | x |
+| BarrierGuard.cpp:49:10:49:15 | call to source | BarrierGuard.cpp:55:13:55:13 | x |
+| BarrierGuard.cpp:60:11:60:16 | call to source | BarrierGuard.cpp:64:14:64:14 | x |
+| BarrierGuard.cpp:60:11:60:16 | call to source | BarrierGuard.cpp:66:14:66:14 | x |
+| acrossLinkTargets.cpp:19:27:19:32 | call to source | acrossLinkTargets.cpp:12:8:12:8 | x |
+| clang.cpp:12:9:12:20 | sourceArray1 | clang.cpp:18:8:18:19 | sourceArray1 |
+| clang.cpp:12:9:12:20 | sourceArray1 | clang.cpp:23:17:23:29 | & ... indirection |
+| clang.cpp:29:27:29:32 | call to source | clang.cpp:30:27:30:28 | m1 |
+| clang.cpp:29:27:29:32 | call to source | clang.cpp:31:27:31:34 | call to getFirst |
+| clang.cpp:35:32:35:37 | call to source | clang.cpp:38:10:38:11 | m2 |
+| clang.cpp:40:42:40:47 | call to source | clang.cpp:42:18:42:19 | m2 |
+| clang.cpp:44:35:44:40 | call to source | clang.cpp:46:17:46:18 | m2 |
+| clang.cpp:50:7:50:16 | definition of stackArray | clang.cpp:52:8:52:17 | stackArray |
+| clang.cpp:50:25:50:30 | call to source | clang.cpp:53:17:53:26 | stackArray indirection |
+| clang.cpp:50:35:50:40 | call to source | clang.cpp:53:17:53:26 | stackArray indirection |
+| clang.cpp:51:19:51:24 | call to source | clang.cpp:53:17:53:26 | stackArray indirection |
+| dispatch.cpp:9:37:9:42 | call to source | dispatch.cpp:35:16:35:25 | call to notSource1 |
+| dispatch.cpp:9:37:9:42 | call to source | dispatch.cpp:43:15:43:24 | call to notSource1 |
+| dispatch.cpp:10:37:10:42 | call to source | dispatch.cpp:36:16:36:25 | call to notSource2 |
+| dispatch.cpp:10:37:10:42 | call to source | dispatch.cpp:44:15:44:24 | call to notSource2 |
+| dispatch.cpp:16:37:16:42 | call to source | dispatch.cpp:32:16:32:24 | call to isSource2 |
+| dispatch.cpp:16:37:16:42 | call to source | dispatch.cpp:40:15:40:23 | call to isSource2 |
+| dispatch.cpp:22:37:22:42 | call to source | dispatch.cpp:31:16:31:24 | call to isSource1 |
+| dispatch.cpp:22:37:22:42 | call to source | dispatch.cpp:39:15:39:23 | call to isSource1 |
+| dispatch.cpp:22:37:22:42 | call to source | dispatch.cpp:55:22:55:30 | call to isSource1 |
+| dispatch.cpp:22:37:22:42 | call to source | dispatch.cpp:58:28:58:36 | call to isSource1 |
+| dispatch.cpp:33:18:33:23 | call to source | dispatch.cpp:23:38:23:38 | x |
+| dispatch.cpp:37:19:37:24 | call to source | dispatch.cpp:11:38:11:38 | x |
+| dispatch.cpp:41:17:41:22 | call to source | dispatch.cpp:23:38:23:38 | x |
+| dispatch.cpp:45:18:45:23 | call to source | dispatch.cpp:11:38:11:38 | x |
+| dispatch.cpp:69:15:69:20 | call to source | dispatch.cpp:23:38:23:38 | x |
+| dispatch.cpp:73:14:73:19 | call to source | dispatch.cpp:23:38:23:38 | x |
+| dispatch.cpp:81:13:81:18 | call to source | dispatch.cpp:23:38:23:38 | x |
+| dispatch.cpp:107:17:107:22 | call to source | dispatch.cpp:96:8:96:8 | x |
+| dispatch.cpp:140:8:140:13 | call to source | dispatch.cpp:96:8:96:8 | x |
+| dispatch.cpp:144:8:144:13 | call to source | dispatch.cpp:96:8:96:8 | x |
+| flowOut.cpp:5:16:5:21 | call to source | flowOut.cpp:19:9:19:9 | x |
+| globals.cpp:5:17:5:22 | call to source | globals.cpp:6:10:6:14 | local |
+| globals.cpp:13:23:13:28 | call to source | globals.cpp:12:10:12:24 | flowTestGlobal1 |
+| globals.cpp:23:23:23:28 | call to source | globals.cpp:19:10:19:24 | flowTestGlobal2 |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:14:8:14:8 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:18:8:18:8 | call to operator() |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:21:8:21:8 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:29:8:29:8 | t |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:35:8:35:8 | a |
+| lambdas.cpp:8:10:8:15 | call to source | lambdas.cpp:41:8:41:8 | a |
+| lambdas.cpp:43:7:43:12 | call to source | lambdas.cpp:46:7:46:7 | w |
+| ref.cpp:29:11:29:16 | call to source | ref.cpp:62:10:62:11 | x3 |
+| ref.cpp:53:9:53:10 | definition of x1 | ref.cpp:56:10:56:11 | x1 |
+| ref.cpp:53:13:53:14 | definition of x2 | ref.cpp:59:10:59:11 | x2 |
+| ref.cpp:53:17:53:18 | definition of x3 | ref.cpp:62:10:62:11 | x3 |
+| ref.cpp:53:21:53:22 | definition of x4 | ref.cpp:65:10:65:11 | x4 |
+| ref.cpp:55:23:55:28 | call to source | ref.cpp:56:10:56:11 | x1 |
+| ref.cpp:94:15:94:20 | call to source | ref.cpp:129:13:129:15 | val |
+| ref.cpp:109:15:109:20 | call to source | ref.cpp:132:13:132:15 | val |
+| ref.cpp:122:23:122:28 | call to source | ref.cpp:123:13:123:15 | val |
+| ref.cpp:125:19:125:24 | call to source | ref.cpp:126:13:126:15 | val |
+| self-Iterator.cpp:19:23:19:30 | call to source | self-Iterator.cpp:20:10:20:10 | x |
+| test.cpp:6:12:6:17 | call to source | test.cpp:7:8:7:9 | t1 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:9:8:9:9 | t1 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:10:8:10:9 | t2 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:15:8:15:9 | t2 |
+| test.cpp:6:12:6:17 | call to source | test.cpp:26:8:26:9 | t1 |
+| test.cpp:35:10:35:15 | call to source | test.cpp:30:8:30:8 | t |
+| test.cpp:36:13:36:18 | call to source | test.cpp:31:8:31:8 | c |
+| test.cpp:50:14:50:19 | call to source | test.cpp:58:10:58:10 | t |
+| test.cpp:66:30:66:36 | source1 | test.cpp:71:8:71:9 | x4 |
+| test.cpp:75:7:75:8 | definition of u1 | test.cpp:76:8:76:9 | u1 |
+| test.cpp:83:7:83:8 | definition of u2 | test.cpp:84:8:84:18 | ... ? ... : ... |
+| test.cpp:83:7:83:8 | definition of u2 | test.cpp:86:8:86:9 | i1 |
+| test.cpp:89:28:89:34 | source1 indirection | test.cpp:90:8:90:14 | source1 |
+| test.cpp:100:13:100:18 | call to source | test.cpp:103:10:103:12 | ref |
+| test.cpp:138:27:138:32 | call to source | test.cpp:140:8:140:8 | y |
+| test.cpp:151:33:151:38 | call to source | test.cpp:144:8:144:8 | s |
+| test.cpp:151:33:151:38 | call to source | test.cpp:152:8:152:8 | y |
+| test.cpp:164:34:164:39 | call to source | test.cpp:157:8:157:8 | x |
+| test.cpp:164:34:164:39 | call to source | test.cpp:165:8:165:8 | y |
+| test.cpp:171:11:171:16 | call to source | test.cpp:178:8:178:8 | y |
+| test.cpp:245:14:245:19 | call to source | test.cpp:260:12:260:12 | x |
+| test.cpp:265:22:265:27 | call to source | test.cpp:266:12:266:12 | x |
+| test.cpp:305:17:305:22 | call to source | test.cpp:289:14:289:14 | x |
+| test.cpp:314:4:314:9 | call to source | test.cpp:318:7:318:7 | x |
+| test.cpp:333:17:333:22 | call to source | test.cpp:337:10:337:18 | globalVar |
+| test.cpp:333:17:333:22 | call to source | test.cpp:339:10:339:18 | globalVar |
+| test.cpp:333:17:333:22 | call to source | test.cpp:343:10:343:18 | globalVar |
+| test.cpp:333:17:333:22 | call to source | test.cpp:349:10:349:18 | globalVar |
+| test.cpp:347:17:347:22 | call to source | test.cpp:337:10:337:18 | globalVar |
+| test.cpp:347:17:347:22 | call to source | test.cpp:339:10:339:18 | globalVar |
+| test.cpp:347:17:347:22 | call to source | test.cpp:343:10:343:18 | globalVar |
+| test.cpp:347:17:347:22 | call to source | test.cpp:349:10:349:18 | globalVar |
+| test.cpp:359:13:359:18 | call to source | test.cpp:365:10:365:14 | field |
+| test.cpp:373:13:373:18 | call to source | test.cpp:369:10:369:14 | field |
+| test.cpp:373:13:373:18 | call to source | test.cpp:375:10:375:14 | field |
+| test.cpp:382:48:382:54 | source1 | test.cpp:385:8:385:10 | tmp |
+| test.cpp:388:53:388:59 | source1 | test.cpp:392:8:392:10 | tmp |
+| test.cpp:388:53:388:59 | source1 | test.cpp:394:10:394:12 | tmp |
+| test.cpp:399:7:399:9 | definition of tmp | test.cpp:401:8:401:10 | tmp |
+| test.cpp:405:7:405:9 | definition of tmp | test.cpp:408:8:408:10 | tmp |
+| test.cpp:416:7:416:11 | definition of local | test.cpp:418:8:418:12 | local |
+| test.cpp:417:16:417:20 | intRefSource output argument | test.cpp:418:8:418:12 | local |
+| test.cpp:422:7:422:11 | definition of local | test.cpp:424:8:424:12 | local |
+| test.cpp:423:20:423:25 | intPointerSource output argument | test.cpp:424:8:424:12 | local |
+| test.cpp:433:7:433:11 | definition of local | test.cpp:435:8:435:12 | local |
+| test.cpp:434:20:434:24 | intPointerSource output argument | test.cpp:436:8:436:13 | * ... |
+| test.cpp:440:7:440:11 | definition of local | test.cpp:442:8:442:12 | local |
+| test.cpp:441:18:441:23 | intArraySource output argument | test.cpp:442:8:442:12 | local |
+| test.cpp:448:7:448:11 | definition of local | test.cpp:450:8:450:12 | local |
+| test.cpp:449:18:449:22 | intArraySource output argument | test.cpp:451:8:451:13 | * ... |
+| test.cpp:456:26:456:32 | source1 | test.cpp:457:9:457:22 | (statement expression) |
+| test.cpp:456:26:456:32 | source1 | test.cpp:468:8:468:12 | local |
+| test.cpp:472:8:472:13 | call to source | test.cpp:478:8:478:8 | x |
+| test.cpp:506:8:506:13 | call to source | test.cpp:513:8:513:8 | x |
+| test.cpp:519:19:519:24 | call to source | test.cpp:521:8:521:20 | access to array |
+| test.cpp:531:29:531:34 | call to source | test.cpp:532:8:532:9 | * ... |
+| test.cpp:547:9:547:9 | definition of x | test.cpp:536:10:536:11 | * ... |
+| test.cpp:551:9:551:9 | definition of y | test.cpp:541:10:541:10 | y |
+| test.cpp:562:17:562:31 | call to indirect_source indirection | test.cpp:566:10:566:19 | * ... |
+| test.cpp:562:17:562:31 | call to indirect_source indirection | test.cpp:568:10:568:19 | * ... |
+| test.cpp:562:17:562:31 | call to indirect_source indirection | test.cpp:572:10:572:19 | * ... |
+| test.cpp:562:17:562:31 | call to indirect_source indirection | test.cpp:578:10:578:19 | * ... |
+| test.cpp:576:17:576:31 | call to indirect_source indirection | test.cpp:566:10:566:19 | * ... |
+| test.cpp:576:17:576:31 | call to indirect_source indirection | test.cpp:568:10:568:19 | * ... |
+| test.cpp:576:17:576:31 | call to indirect_source indirection | test.cpp:572:10:572:19 | * ... |
+| test.cpp:576:17:576:31 | call to indirect_source indirection | test.cpp:578:10:578:19 | * ... |
+| test.cpp:594:12:594:26 | call to indirect_source indirection | test.cpp:597:8:597:13 | * ... |
+| test.cpp:601:20:601:20 | intPointerSource output argument | test.cpp:603:8:603:9 | * ... |
+| test.cpp:607:20:607:20 | intPointerSource output argument | test.cpp:609:8:609:9 | * ... |
+| test.cpp:614:20:614:20 | intPointerSource output argument | test.cpp:616:8:616:17 | * ... |
+| test.cpp:628:20:628:25 | intPointerSource output argument | test.cpp:629:17:629:22 | buffer indirection |
+| test.cpp:633:18:633:23 | call to source | test.cpp:634:8:634:8 | x |
+| test.cpp:646:7:646:12 | call to source | test.cpp:645:8:645:8 | x |
+| test.cpp:660:7:660:12 | call to source | test.cpp:658:8:658:8 | x |
+| test.cpp:664:18:664:23 | call to source | test.cpp:666:8:666:16 | * ... |
+| test.cpp:681:7:681:12 | call to source | test.cpp:679:8:679:16 | * ... |
+| test.cpp:733:7:733:7 | definition of x | test.cpp:735:8:735:8 | x |
+| test.cpp:751:27:751:32 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:753:32:753:37 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:755:32:755:37 | call to source | test.cpp:740:10:740:10 | x |
+| test.cpp:771:27:771:32 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:773:32:773:37 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:775:32:775:37 | call to source | test.cpp:760:10:760:10 | x |
+| test.cpp:788:31:788:36 | call to source | test.cpp:782:12:782:12 | x |
+| test.cpp:790:31:790:36 | call to source | test.cpp:782:12:782:12 | x |
+| test.cpp:797:22:797:28 | intPointerSource output argument | test.cpp:798:19:798:25 | content indirection |
+| test.cpp:808:25:808:39 | call to indirect_source indirection | test.cpp:813:19:813:35 | * ... indirection |
+| test.cpp:818:26:818:31 | call to source | test.cpp:823:10:823:27 | * ... |
+| test.cpp:832:21:832:26 | call to source | test.cpp:836:10:836:22 | global_direct |
+| test.cpp:842:11:842:16 | call to source | test.cpp:844:8:844:8 | y |
+| test.cpp:846:13:846:27 | call to indirect_source indirection | test.cpp:848:17:848:25 | rpx indirection |
+| test.cpp:853:55:853:62 | call to source | test.cpp:854:10:854:36 | * ... |
+| test.cpp:860:54:860:59 | call to source | test.cpp:861:10:861:37 | static_local_pointer_dynamic |
+| test.cpp:872:46:872:51 | call to source | test.cpp:875:10:875:31 | global_pointer_dynamic |
+| test.cpp:880:64:880:83 | indirect_source(1) indirection | test.cpp:883:10:883:45 | static_local_array_static_indirect_1 |
+| test.cpp:881:64:881:83 | indirect_source(2) indirection | test.cpp:886:19:886:54 | static_local_array_static_indirect_2 indirection |
+| test.cpp:890:54:890:61 | source | test.cpp:893:10:893:36 | static_local_pointer_static |
+| test.cpp:891:65:891:84 | indirect_source(1) indirection | test.cpp:895:19:895:56 | static_local_pointer_static_indirect_1 indirection |
+| test.cpp:901:56:901:75 | indirect_source(1) indirection | test.cpp:907:10:907:39 | global_array_static_indirect_1 |
+| test.cpp:902:56:902:75 | indirect_source(2) indirection | test.cpp:911:19:911:48 | global_array_static_indirect_2 indirection |
+| test.cpp:914:46:914:53 | source | test.cpp:919:10:919:30 | global_pointer_static |
+| test.cpp:915:57:915:76 | indirect_source(1) indirection | test.cpp:921:19:921:50 | global_pointer_static_indirect_1 indirection |
+| true_upon_entry.cpp:9:11:9:16 | call to source | true_upon_entry.cpp:13:8:13:8 | x |
+| true_upon_entry.cpp:17:11:17:16 | call to source | true_upon_entry.cpp:21:8:21:8 | x |
+| true_upon_entry.cpp:27:9:27:14 | call to source | true_upon_entry.cpp:29:8:29:8 | x |
+| true_upon_entry.cpp:33:11:33:16 | call to source | true_upon_entry.cpp:39:8:39:8 | x |
+| true_upon_entry.cpp:43:11:43:16 | call to source | true_upon_entry.cpp:49:8:49:8 | x |
+| true_upon_entry.cpp:54:11:54:16 | call to source | true_upon_entry.cpp:57:8:57:8 | x |
+| true_upon_entry.cpp:62:11:62:16 | call to source | true_upon_entry.cpp:66:8:66:8 | x |
+| true_upon_entry.cpp:70:11:70:16 | call to source | true_upon_entry.cpp:78:8:78:8 | x |
+| true_upon_entry.cpp:83:11:83:16 | call to source | true_upon_entry.cpp:86:8:86:8 | x |
+| true_upon_entry.cpp:98:11:98:16 | call to source | true_upon_entry.cpp:105:8:105:8 | x |

cpp/ql/test/library-tests/dataflow/dataflow-tests/test-source-sink.ql

@@ -0,0 +1,9 @@
+import TestBase
+
+query predicate astFlow(AstTest::DataFlow::Node source, AstTest::DataFlow::Node sink) {
+  AstTest::AstFlow::flow(source, sink)
+}
+
+query predicate irFlow(IRTest::DataFlow::Node source, IRTest::DataFlow::Node sink) {
+  IRTest::IRFlow::flow(source, sink)
+}

cpp/ql/test/library-tests/dataflow/dataflow-tests/test.cpp

@@ -1,5 +1,5 @@
 int source();
-void sink(int); void sink(const int *); void sink(int **); void indirect_sink(...);
+void sink(...); void indirect_sink(...);
 
 void intraprocedural_with_local_flow() {
   int t2;
@@ -836,4 +836,90 @@ namespace MoreGlobalTests {
     sink(global_direct); // $ ir MISSING: ast
     indirect_sink(global_direct); // clean
   }
+}
+
+void test_references() {
+  int x = source();
+  int &y = x;
+  sink(y); // $ ast,ir
+
+  int* px = indirect_source();
+  int*& rpx = px;
+  indirect_sink((int*)rpx); // $ ast,ir
+}
+
+namespace GlobalArrays {
+  void test1() {
+    static const int static_local_array_dynamic[] = { ::source() };
+    sink(*static_local_array_dynamic); // $ ir MISSING: ast
+  }
+
+  const int* source(bool);
+
+  void test2() {
+    static const int* static_local_pointer_dynamic = source(true);
+    sink(static_local_pointer_dynamic); // $ ast,ir
+  }
+
+  static const int global_array_dynamic[] = { ::source() };
+
+  void test3() {
+    sink(*global_array_dynamic); // $ MISSING: ir,ast // Missing in IR because no 'IRFunction' for global_array is generated because the type of global_array_dynamic is "deeply const".
+  }
+
+  const int* source(bool);
+
+  static const int* global_pointer_dynamic = source(true);
+
+  void test4() {
+    sink(global_pointer_dynamic); // $ ir MISSING: ast
+  }
+
+  void test5() {
+    static const char static_local_array_static[] = "source";
+    static const char static_local_array_static_indirect_1[] = "indirect_source(1)";
+    static const char static_local_array_static_indirect_2[] = "indirect_source(2)";
+    sink(static_local_array_static); // clean
+    sink(static_local_array_static_indirect_1); // $ ir MISSING: ast
+    indirect_sink(static_local_array_static_indirect_1); // clean
+    sink(static_local_array_static_indirect_2); // clean
+    indirect_sink(static_local_array_static_indirect_2); // $ ir MISSING: ast
+  }
+
+  void test6() {
+    static const char* static_local_pointer_static = "source";
+    static const char* static_local_pointer_static_indirect_1 = "indirect_source(1)";
+    static const char* static_local_pointer_static_indirect_2 = "indirect_source(2)";
+    sink(static_local_pointer_static); // $ ir MISSING: ast
+    sink(static_local_pointer_static_indirect_1); // clean
+    indirect_sink(static_local_pointer_static_indirect_1); // $ ir MISSING: ast
+    sink(static_local_pointer_static_indirect_2); // clean: static_local_pointer_static_indirect_2 does not have 2 indirections
+    indirect_sink(static_local_pointer_static_indirect_2); // clean: static_local_pointer_static_indirect_2 does not have 2 indirections
+  }
+
+  static const char global_array_static[] = "source";
+  static const char global_array_static_indirect_1[] = "indirect_source(1)";
+  static const char global_array_static_indirect_2[] = "indirect_source(2)";
+
+  void test7() {
+    sink(global_array_static); // clean
+    sink(*global_array_static); // clean
+    sink(global_array_static_indirect_1); // $ ir MISSING: ast
+    sink(*global_array_static_indirect_1); // clean
+    indirect_sink(global_array_static); // clean
+    indirect_sink(global_array_static_indirect_1); // clean
+    indirect_sink(global_array_static_indirect_2); // $ ir MISSING: ast
+  }
+
+  static const char* global_pointer_static = "source";
+  static const char* global_pointer_static_indirect_1 = "indirect_source(1)";
+  static const char* global_pointer_static_indirect_2 = "indirect_source(2)";
+
+  void test8() {
+    sink(global_pointer_static); // $ ir MISSING: ast
+    sink(global_pointer_static_indirect_1); // clean
+    indirect_sink(global_pointer_static_indirect_1); // $ ir MISSING: ast
+    sink(global_pointer_static_indirect_2); // clean: global_pointer_static_indirect_2 does not have 2 indirections
+    indirect_sink(global_pointer_static_indirect_2); // clean: global_pointer_static_indirect_2 does not have 2 indirections
+  }
 }

cpp/ql/test/library-tests/dataflow/dataflow-tests/test.expected

@@ -1,9 +1,2 @@
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:19,45-53)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:20,24-32)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:27,15-23)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:33,22-30)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:40,25-33)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:42,17-25)
-WARNING: Module DataFlow has been deprecated and may be removed in future (test.ql:46,20-28)
 testFailures
 failures

cpp/ql/test/library-tests/dataflow/dataflow-tests/test.ql

@@ -1,107 +1,3 @@
+import TestBase
 import TestUtilities.dataflow.FlowTestCommon
-
-module AstTest {
-  private import semmle.code.cpp.dataflow.DataFlow
-  private import semmle.code.cpp.controlflow.Guards
-
-  /**
-   * A `BarrierGuard` that stops flow to all occurrences of `x` within statement
-   * S in `if (guarded(x)) S`.
-   */
-  // This is tested in `BarrierGuard.cpp`.
-  predicate testBarrierGuard(GuardCondition g, Expr checked, boolean isTrue) {
-    g.(FunctionCall).getTarget().getName() = "guarded" and
-    checked = g.(FunctionCall).getArgument(0) and
-    isTrue = true
-  }
-
-  /** Common data flow configuration to be used by tests. */
-  module AstTestAllocationConfig implements DataFlow::ConfigSig {
-    predicate isSource(DataFlow::Node source) {
-      source.asExpr().(FunctionCall).getTarget().getName() = "source"
-      or
-      source.asParameter().getName().matches("source%")
-      or
-      source.asExpr().(FunctionCall).getTarget().getName() = "indirect_source"
-      or
-      source.(DataFlow::DefinitionByReferenceNode).getParameter().getName().matches("ref_source%")
-      or
-      // Track uninitialized variables
-      exists(source.asUninitialized())
-    }
-
-    predicate isSink(DataFlow::Node sink) {
-      exists(FunctionCall call |
-        call.getTarget().getName() = ["sink", "indirect_sink"] and
-        sink.asExpr() = call.getAnArgument()
-      )
-    }
-
-    predicate isBarrier(DataFlow::Node barrier) {
-      barrier.asExpr().(VariableAccess).getTarget().hasName("barrier") or
-      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getABarrierNode()
-    }
-  }
-
-  module AstFlow = DataFlow::Global<AstTestAllocationConfig>;
-}
-
-module IRTest {
-  private import cpp
-  private import semmle.code.cpp.ir.dataflow.DataFlow
-  private import semmle.code.cpp.ir.IR
-  private import semmle.code.cpp.controlflow.IRGuards
-
-  /**
-   * A `BarrierGuard` that stops flow to all occurrences of `x` within statement
-   * S in `if (guarded(x)) S`.
-   */
-  // This is tested in `BarrierGuard.cpp`.
-  predicate testBarrierGuard(IRGuardCondition g, Expr checked, boolean isTrue) {
-    exists(Call call |
-      call = g.getUnconvertedResultExpression() and
-      call.getTarget().hasName("guarded") and
-      checked = call.getArgument(0) and
-      isTrue = true
-    )
-  }
-
-  /** Common data flow configuration to be used by tests. */
-  module IRTestAllocationConfig implements DataFlow::ConfigSig {
-    predicate isSource(DataFlow::Node source) {
-      source.asExpr().(FunctionCall).getTarget().getName() = "source"
-      or
-      source.asIndirectExpr(1).(FunctionCall).getTarget().getName() = "indirect_source"
-      or
-      source.asParameter().getName().matches("source%")
-      or
-      source.(DataFlow::DefinitionByReferenceNode).getParameter().getName().matches("ref_source%")
-      or
-      exists(source.asUninitialized())
-    }
-
-    predicate isSink(DataFlow::Node sink) {
-      exists(FunctionCall call, Expr e | e = call.getAnArgument() |
-        call.getTarget().getName() = "sink" and
-        sink.asExpr() = e
-        or
-        call.getTarget().getName() = "indirect_sink" and
-        sink.asIndirectExpr() = e
-      )
-    }
-
-    predicate isBarrier(DataFlow::Node barrier) {
-      exists(Expr barrierExpr | barrierExpr in [barrier.asExpr(), barrier.asIndirectExpr()] |
-        barrierExpr.(VariableAccess).getTarget().hasName("barrier")
-      )
-      or
-      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getABarrierNode()
-      or
-      barrier = DataFlow::BarrierGuard<testBarrierGuard/3>::getAnIndirectBarrierNode()
-    }
-  }
-
-  module IRFlow = DataFlow::Global<IRTestAllocationConfig>;
-}
-
 import MakeTest<MergeTests<AstFlowTest<AstTest::AstFlow>, IRFlowTest<IRTest::IRFlow>>>

cpp/ql/test/library-tests/ir/ir/aliased_ir.expected

@@ -2770,43 +2770,65 @@ ir.cpp:
 #  462|     m462_2(int)         = Uninitialized[x]       : &:r462_1
 #  463|     r463_1(glval<bool>) = VariableAddress[a]     : 
 #  463|     r463_2(bool)        = Load[a]                : &:r463_1, m461_6
-#  463|     v463_3(void)        = ConditionalBranch      : r463_2
-#-----|   False -> Block 1
-#-----|   True -> Block 2
+#  463|     r463_3(bool)        = LogicalNot             : r463_2
+#  463|     v463_4(void)        = ConditionalBranch      : r463_3
+#-----|   False -> Block 5
+#-----|   True -> Block 1
 
 #  464|   Block 1
 #  464|     r464_1(int)        = Constant[1]        : 
 #  464|     r464_2(glval<int>) = VariableAddress[x] : 
 #  464|     m464_3(int)        = Store[x]           : &:r464_2, r464_1
-#-----|   Goto -> Block 2
+#-----|   Goto -> Block 5
 
 #  467|   Block 2
-#  467|     r467_1(glval<bool>) = VariableAddress[a] : 
-#  467|     r467_2(bool)        = Load[a]            : &:r467_1, m461_6
-#  467|     v467_3(void)        = ConditionalBranch  : r467_2
-#-----|   False -> Block 4
-#-----|   True -> Block 3
+#  467|     r467_1(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_2(bool)        = Constant[0]                  : 
+#  467|     m467_3(bool)        = Store[#temp467:11]           : &:r467_1, r467_2
+#-----|   Goto -> Block 3
 
 #  467|   Block 3
-#  467|     r467_4(glval<bool>) = VariableAddress[b] : 
-#  467|     r467_5(bool)        = Load[b]            : &:r467_4, m461_8
-#  467|     v467_6(void)        = ConditionalBranch  : r467_5
-#-----|   False -> Block 4
-#-----|   True -> Block 5
+#  467|     m467_4(bool)        = Phi                          : from 2:m467_3, from 4:m467_11
+#  467|     r467_5(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_6(bool)        = Load[#temp467:11]            : &:r467_5, m467_4
+#  467|     r467_7(bool)        = LogicalNot                   : r467_6
+#  467|     v467_8(void)        = ConditionalBranch            : r467_7
+#-----|   False -> Block 8
+#-----|   True -> Block 7
 
-#  468|   Block 4
+#  467|   Block 4
+#  467|     r467_9(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_10(bool)       = Constant[1]                  : 
+#  467|     m467_11(bool)       = Store[#temp467:11]           : &:r467_9, r467_10
+#-----|   Goto -> Block 3
+
+#  467|   Block 5
+#  467|     r467_12(glval<bool>) = VariableAddress[a] : 
+#  467|     r467_13(bool)        = Load[a]            : &:r467_12, m461_6
+#  467|     v467_14(void)        = ConditionalBranch  : r467_13
+#-----|   False -> Block 2
+#-----|   True -> Block 6
+
+#  467|   Block 6
+#  467|     r467_15(glval<bool>) = VariableAddress[b] : 
+#  467|     r467_16(bool)        = Load[b]            : &:r467_15, m461_8
+#  467|     v467_17(void)        = ConditionalBranch  : r467_16
+#-----|   False -> Block 2
+#-----|   True -> Block 4
+
+#  468|   Block 7
 #  468|     r468_1(int)        = Constant[2]        : 
 #  468|     r468_2(glval<int>) = VariableAddress[x] : 
 #  468|     m468_3(int)        = Store[x]           : &:r468_2, r468_1
-#-----|   Goto -> Block 6
+#-----|   Goto -> Block 9
 
-#  471|   Block 5
+#  471|   Block 8
 #  471|     r471_1(int)        = Constant[3]        : 
 #  471|     r471_2(glval<int>) = VariableAddress[x] : 
 #  471|     m471_3(int)        = Store[x]           : &:r471_2, r471_1
-#-----|   Goto -> Block 6
+#-----|   Goto -> Block 9
 
-#  473|   Block 6
+#  473|   Block 9
 #  473|     v473_1(void)  = NoOp         : 
 #  461|     v461_9(void)  = ReturnVoid   : 
 #  461|     v461_10(void) = AliasedUse   : m461_3

cpp/ql/test/library-tests/ir/ir/operand_locations.expected

@@ -2398,16 +2398,27 @@
 | ir.cpp:461:22:461:22 | Address | &:r461_5 |
 | ir.cpp:461:30:461:30 | Address | &:r461_7 |
 | ir.cpp:462:9:462:9 | Address | &:r462_1 |
+| ir.cpp:463:9:463:10 | Condition | r463_3 |
 | ir.cpp:463:10:463:10 | Address | &:r463_1 |
-| ir.cpp:463:10:463:10 | Condition | r463_2 |
 | ir.cpp:463:10:463:10 | Load | m461_6 |
+| ir.cpp:463:10:463:10 | Unary | r463_2 |
 | ir.cpp:464:9:464:9 | Address | &:r464_2 |
 | ir.cpp:464:13:464:13 | StoreValue | r464_1 |
-| ir.cpp:467:11:467:11 | Address | &:r467_1 |
-| ir.cpp:467:11:467:11 | Condition | r467_2 |
+| ir.cpp:467:9:467:17 | Condition | r467_7 |
+| ir.cpp:467:11:467:11 | Address | &:r467_12 |
+| ir.cpp:467:11:467:11 | Condition | r467_13 |
 | ir.cpp:467:11:467:11 | Load | m461_6 |
-| ir.cpp:467:16:467:16 | Address | &:r467_4 |
-| ir.cpp:467:16:467:16 | Condition | r467_5 |
+| ir.cpp:467:11:467:16 | Address | &:r467_1 |
+| ir.cpp:467:11:467:16 | Address | &:r467_5 |
+| ir.cpp:467:11:467:16 | Address | &:r467_9 |
+| ir.cpp:467:11:467:16 | Load | m467_4 |
+| ir.cpp:467:11:467:16 | Phi | from 2:m467_3 |
+| ir.cpp:467:11:467:16 | Phi | from 4:m467_11 |
+| ir.cpp:467:11:467:16 | StoreValue | r467_2 |
+| ir.cpp:467:11:467:16 | StoreValue | r467_10 |
+| ir.cpp:467:11:467:16 | Unary | r467_6 |
+| ir.cpp:467:16:467:16 | Address | &:r467_15 |
+| ir.cpp:467:16:467:16 | Condition | r467_16 |
 | ir.cpp:467:16:467:16 | Load | m461_8 |
 | ir.cpp:468:9:468:9 | Address | &:r468_2 |
 | ir.cpp:468:13:468:13 | StoreValue | r468_1 |

cpp/ql/test/library-tests/ir/ir/raw_ir.expected

@@ -2725,43 +2725,64 @@ ir.cpp:
 #  462|     mu462_2(int)        = Uninitialized[x]       : &:r462_1
 #  463|     r463_1(glval<bool>) = VariableAddress[a]     : 
 #  463|     r463_2(bool)        = Load[a]                : &:r463_1, ~m?
-#  463|     v463_3(void)        = ConditionalBranch      : r463_2
-#-----|   False -> Block 1
-#-----|   True -> Block 2
+#  463|     r463_3(bool)        = LogicalNot             : r463_2
+#  463|     v463_4(void)        = ConditionalBranch      : r463_3
+#-----|   False -> Block 5
+#-----|   True -> Block 1
 
 #  464|   Block 1
 #  464|     r464_1(int)        = Constant[1]        : 
 #  464|     r464_2(glval<int>) = VariableAddress[x] : 
 #  464|     mu464_3(int)       = Store[x]           : &:r464_2, r464_1
-#-----|   Goto -> Block 2
+#-----|   Goto -> Block 5
 
 #  467|   Block 2
-#  467|     r467_1(glval<bool>) = VariableAddress[a] : 
-#  467|     r467_2(bool)        = Load[a]            : &:r467_1, ~m?
-#  467|     v467_3(void)        = ConditionalBranch  : r467_2
-#-----|   False -> Block 4
-#-----|   True -> Block 3
+#  467|     r467_1(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_2(bool)        = Constant[0]                  : 
+#  467|     mu467_3(bool)       = Store[#temp467:11]           : &:r467_1, r467_2
+#-----|   Goto -> Block 3
 
 #  467|   Block 3
-#  467|     r467_4(glval<bool>) = VariableAddress[b] : 
-#  467|     r467_5(bool)        = Load[b]            : &:r467_4, ~m?
-#  467|     v467_6(void)        = ConditionalBranch  : r467_5
-#-----|   False -> Block 4
-#-----|   True -> Block 5
+#  467|     r467_4(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_5(bool)        = Load[#temp467:11]            : &:r467_4, ~m?
+#  467|     r467_6(bool)        = LogicalNot                   : r467_5
+#  467|     v467_7(void)        = ConditionalBranch            : r467_6
+#-----|   False -> Block 8
+#-----|   True -> Block 7
 
-#  468|   Block 4
+#  467|   Block 4
+#  467|     r467_8(glval<bool>) = VariableAddress[#temp467:11] : 
+#  467|     r467_9(bool)        = Constant[1]                  : 
+#  467|     mu467_10(bool)      = Store[#temp467:11]           : &:r467_8, r467_9
+#-----|   Goto -> Block 3
+
+#  467|   Block 5
+#  467|     r467_11(glval<bool>) = VariableAddress[a] : 
+#  467|     r467_12(bool)        = Load[a]            : &:r467_11, ~m?
+#  467|     v467_13(void)        = ConditionalBranch  : r467_12
+#-----|   False -> Block 2
+#-----|   True -> Block 6
+
+#  467|   Block 6
+#  467|     r467_14(glval<bool>) = VariableAddress[b] : 
+#  467|     r467_15(bool)        = Load[b]            : &:r467_14, ~m?
+#  467|     v467_16(void)        = ConditionalBranch  : r467_15
+#-----|   False -> Block 2
+#-----|   True -> Block 4
+
+#  468|   Block 7
 #  468|     r468_1(int)        = Constant[2]        : 
 #  468|     r468_2(glval<int>) = VariableAddress[x] : 
 #  468|     mu468_3(int)       = Store[x]           : &:r468_2, r468_1
-#-----|   Goto -> Block 6
+#-----|   Goto -> Block 9
 
-#  471|   Block 5
+#  471|   Block 8
 #  471|     r471_1(int)        = Constant[3]        : 
 #  471|     r471_2(glval<int>) = VariableAddress[x] : 
 #  471|     mu471_3(int)       = Store[x]           : &:r471_2, r471_1
-#-----|   Goto -> Block 6
+#-----|   Goto -> Block 9
 
-#  473|   Block 6
+#  473|   Block 9
 #  473|     v473_1(void)  = NoOp         : 
 #  461|     v461_8(void)  = ReturnVoid   : 
 #  461|     v461_9(void)  = AliasedUse   : ~m?

cpp/ql/test/library-tests/ir/modulus-analysis/ModulusAnalysis.ql

@@ -2,7 +2,6 @@ import cpp
 import codeql.rangeanalysis.ModulusAnalysis
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.Semantic
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticLocation
-import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.RangeUtils
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.FloatDelta
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.RangeAnalysisRelativeSpecific
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.RangeAnalysisImpl
@@ -10,9 +9,7 @@ import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticExprSpecific
 import semmle.code.cpp.ir.IR as IR
 import TestUtilities.InlineExpectationsTest
 
-module ModulusAnalysisInstantiated =
-  ModulusAnalysis<SemLocation, Sem, FloatDelta, ConstantBounds,
-    RangeUtil<FloatDelta, CppLangImplRelative>>;
+module ModulusAnalysisInstantiated = ModulusAnalysis<SemLocation, Sem, FloatDelta, ConstantBounds>;
 
 module ModulusAnalysisTest implements TestSig {
   string getARelevantTag() { result = "mod" }

cpp/ql/test/library-tests/ir/sign-analysis/SignAnalysis.ql

@@ -1,15 +1,13 @@
 import cpp
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.SignAnalysisCommon
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.Semantic
-import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.RangeUtils
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.FloatDelta
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.analysis.RangeAnalysisRelativeSpecific
 import semmle.code.cpp.rangeanalysis.new.internal.semantic.SemanticExprSpecific
 import semmle.code.cpp.ir.IR as IR
 import TestUtilities.InlineExpectationsTest
 
-module SignAnalysisInstantiated =
-  SignAnalysis<FloatDelta, RangeUtil<FloatDelta, CppLangImplRelative>>;
+module SignAnalysisInstantiated = SignAnalysis<FloatDelta>;
 
 module SignAnalysisTest implements TestSig {
   string getARelevantTag() { result = "sign" }

cpp/ql/test/query-tests/Likely Bugs/Memory Management/ImproperNullTermination/ImproperNullTerminationTainted.expected

@@ -1,2 +1,2 @@
-| test.cpp:466:10:466:15 | buffer | String operation depends on a $@ that may not be null terminated. | test.cpp:465:18:465:23 | buffer | user-provided value |
-| test.cpp:481:10:481:15 | buffer | String operation depends on a $@ that may not be null terminated. | test.cpp:480:9:480:14 | buffer | user-provided value |
+| test.cpp:466:10:466:15 | buffer | String operation depends on $@ that may not be null terminated. | test.cpp:465:18:465:23 | read output argument | buffer read by read |
+| test.cpp:481:10:481:15 | buffer | String operation depends on $@ that may not be null terminated. | test.cpp:480:9:480:14 | fread output argument | string read by fread |

cpp/ql/test/query-tests/Likely Bugs/Memory Management/ReturnStackAllocatedMemory/ReturnStackAllocatedMemory.expected

@@ -43,6 +43,11 @@ edges
 | test.cpp:189:16:189:16 | p | test.cpp:189:16:189:16 | (reference to) |
 | test.cpp:190:10:190:13 | (reference dereference) | test.cpp:190:10:190:13 | (reference to) |
 | test.cpp:190:10:190:13 | pRef | test.cpp:190:10:190:13 | (reference dereference) |
+| test.cpp:237:12:237:17 | call to alloca | test.cpp:237:12:237:17 | call to alloca |
+| test.cpp:237:12:237:17 | call to alloca | test.cpp:238:9:238:9 | p |
+| test.cpp:249:13:249:20 | call to strndupa | test.cpp:249:13:249:20 | call to strndupa |
+| test.cpp:249:13:249:20 | call to strndupa | test.cpp:250:9:250:10 | s2 |
+| test.cpp:250:9:250:10 | s2 | test.cpp:250:9:250:10 | (void *)... |
 nodes
 | test.cpp:17:9:17:11 | & ... | semmle.label | & ... |
 | test.cpp:17:10:17:11 | mc | semmle.label | mc |
@@ -101,6 +106,14 @@ nodes
 | test.cpp:190:10:190:13 | (reference dereference) | semmle.label | (reference dereference) |
 | test.cpp:190:10:190:13 | (reference to) | semmle.label | (reference to) |
 | test.cpp:190:10:190:13 | pRef | semmle.label | pRef |
+| test.cpp:237:12:237:17 | call to alloca | semmle.label | call to alloca |
+| test.cpp:237:12:237:17 | call to alloca | semmle.label | call to alloca |
+| test.cpp:238:9:238:9 | p | semmle.label | p |
+| test.cpp:245:9:245:15 | call to strdupa | semmle.label | call to strdupa |
+| test.cpp:249:13:249:20 | call to strndupa | semmle.label | call to strndupa |
+| test.cpp:249:13:249:20 | call to strndupa | semmle.label | call to strndupa |
+| test.cpp:250:9:250:10 | (void *)... | semmle.label | (void *)... |
+| test.cpp:250:9:250:10 | s2 | semmle.label | s2 |
 #select
 | test.cpp:17:9:17:11 | CopyValue: & ... | test.cpp:17:10:17:11 | mc | test.cpp:17:9:17:11 | & ... | May return stack-allocated memory from $@. | test.cpp:17:10:17:11 | mc | mc |
 | test.cpp:25:9:25:11 | Load: ptr | test.cpp:23:18:23:19 | mc | test.cpp:25:9:25:11 | ptr | May return stack-allocated memory from $@. | test.cpp:23:18:23:19 | mc | mc |
@@ -115,3 +128,6 @@ nodes
 | test.cpp:177:10:177:23 | Convert: (void *)... | test.cpp:176:25:176:34 | localArray | test.cpp:177:10:177:23 | (void *)... | May return stack-allocated memory from $@. | test.cpp:176:25:176:34 | localArray | localArray |
 | test.cpp:183:10:183:19 | CopyValue: (reference to) | test.cpp:182:21:182:27 | myLocal | test.cpp:183:10:183:19 | (reference to) | May return stack-allocated memory from $@. | test.cpp:182:21:182:27 | myLocal | myLocal |
 | test.cpp:190:10:190:13 | CopyValue: (reference to) | test.cpp:189:16:189:16 | p | test.cpp:190:10:190:13 | (reference to) | May return stack-allocated memory from $@. | test.cpp:189:16:189:16 | p | p |
+| test.cpp:238:9:238:9 | Load: p | test.cpp:237:12:237:17 | call to alloca | test.cpp:238:9:238:9 | p | May return stack-allocated memory from $@. | test.cpp:237:12:237:17 | call to alloca | call to alloca |
+| test.cpp:245:9:245:15 | Call: call to strdupa | test.cpp:245:9:245:15 | call to strdupa | test.cpp:245:9:245:15 | call to strdupa | May return stack-allocated memory from $@. | test.cpp:245:9:245:15 | call to strdupa | call to strdupa |
+| test.cpp:250:9:250:10 | Convert: (void *)... | test.cpp:249:13:249:20 | call to strndupa | test.cpp:250:9:250:10 | (void *)... | May return stack-allocated memory from $@. | test.cpp:249:13:249:20 | call to strndupa | call to strndupa |

cpp/ql/test/query-tests/Likely Bugs/Memory Management/ReturnStackAllocatedMemory/test.cpp

@@ -229,4 +229,23 @@ int* id(int* px) {
 void f() {
   int x;
   int* px = id(&x); // GOOD
+}
+
+void *alloca(size_t);
+
+void* test_alloca() {
+	void* p = alloca(10);
+	return p; // BAD
+}
+
+char *strdupa(const char *);
+char *strndupa(const char *, size_t);
+
+char* test_strdupa(const char* s) {
+	return strdupa(s); // BAD
+}
+
+void* test_strndupa(const char* s, size_t size) {
+	char* s2 = strndupa(s, size);
+	return s2; // BAD
 }

cpp/ql/test/query-tests/Security/CWE/CWE-078/semmle/ExecTainted/ExecTainted.expected

@@ -14,18 +14,15 @@ edges
 | test.cpp:91:9:91:16 | fread output argument | test.cpp:93:17:93:24 | filename indirection |
 | test.cpp:93:11:93:14 | strncat output argument | test.cpp:94:45:94:48 | path indirection |
 | test.cpp:93:17:93:24 | filename indirection | test.cpp:93:11:93:14 | strncat output argument |
-| test.cpp:106:20:106:38 | call to getenv | test.cpp:107:33:107:36 | path indirection |
 | test.cpp:106:20:106:38 | call to getenv indirection | test.cpp:107:33:107:36 | path indirection |
 | test.cpp:107:31:107:31 | call to operator+ | test.cpp:108:18:108:22 | call to c_str indirection |
 | test.cpp:107:33:107:36 | path indirection | test.cpp:107:31:107:31 | call to operator+ |
-| test.cpp:113:20:113:38 | call to getenv | test.cpp:114:19:114:22 | path indirection |
 | test.cpp:113:20:113:38 | call to getenv indirection | test.cpp:114:19:114:22 | path indirection |
 | test.cpp:114:10:114:23 | call to operator+ | test.cpp:114:25:114:29 | call to c_str indirection |
 | test.cpp:114:10:114:23 | call to operator+ | test.cpp:114:25:114:29 | call to c_str indirection |
 | test.cpp:114:17:114:17 | call to operator+ | test.cpp:114:10:114:23 | call to operator+ |
 | test.cpp:114:19:114:22 | path indirection | test.cpp:114:10:114:23 | call to operator+ |
 | test.cpp:114:19:114:22 | path indirection | test.cpp:114:17:114:17 | call to operator+ |
-| test.cpp:119:20:119:38 | call to getenv | test.cpp:120:19:120:22 | path indirection |
 | test.cpp:119:20:119:38 | call to getenv indirection | test.cpp:120:19:120:22 | path indirection |
 | test.cpp:120:17:120:17 | call to operator+ | test.cpp:120:10:120:30 | call to data indirection |
 | test.cpp:120:19:120:22 | path indirection | test.cpp:120:17:120:17 | call to operator+ |
@@ -89,12 +86,10 @@ nodes
 | test.cpp:93:11:93:14 | strncat output argument | semmle.label | strncat output argument |
 | test.cpp:93:17:93:24 | filename indirection | semmle.label | filename indirection |
 | test.cpp:94:45:94:48 | path indirection | semmle.label | path indirection |
-| test.cpp:106:20:106:38 | call to getenv | semmle.label | call to getenv |
 | test.cpp:106:20:106:38 | call to getenv indirection | semmle.label | call to getenv indirection |
 | test.cpp:107:31:107:31 | call to operator+ | semmle.label | call to operator+ |
 | test.cpp:107:33:107:36 | path indirection | semmle.label | path indirection |
 | test.cpp:108:18:108:22 | call to c_str indirection | semmle.label | call to c_str indirection |
-| test.cpp:113:20:113:38 | call to getenv | semmle.label | call to getenv |
 | test.cpp:113:20:113:38 | call to getenv indirection | semmle.label | call to getenv indirection |
 | test.cpp:114:10:114:23 | call to operator+ | semmle.label | call to operator+ |
 | test.cpp:114:10:114:23 | call to operator+ | semmle.label | call to operator+ |
@@ -102,7 +97,6 @@ nodes
 | test.cpp:114:19:114:22 | path indirection | semmle.label | path indirection |
 | test.cpp:114:25:114:29 | call to c_str indirection | semmle.label | call to c_str indirection |
 | test.cpp:114:25:114:29 | call to c_str indirection | semmle.label | call to c_str indirection |
-| test.cpp:119:20:119:38 | call to getenv | semmle.label | call to getenv |
 | test.cpp:119:20:119:38 | call to getenv indirection | semmle.label | call to getenv indirection |
 | test.cpp:120:10:120:30 | call to data indirection | semmle.label | call to data indirection |
 | test.cpp:120:17:120:17 | call to operator+ | semmle.label | call to operator+ |
@@ -156,13 +150,9 @@ subpaths
 | test.cpp:65:10:65:16 | command | test.cpp:62:9:62:16 | fread output argument | test.cpp:65:10:65:16 | command indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:62:9:62:16 | fread output argument | user input (string read by fread) | test.cpp:64:11:64:17 | strncat output argument | strncat output argument |
 | test.cpp:85:32:85:38 | command | test.cpp:82:9:82:16 | fread output argument | test.cpp:85:32:85:38 | command indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to execl. | test.cpp:82:9:82:16 | fread output argument | user input (string read by fread) | test.cpp:84:11:84:17 | strncat output argument | strncat output argument |
 | test.cpp:94:45:94:48 | path | test.cpp:91:9:91:16 | fread output argument | test.cpp:94:45:94:48 | path indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to execl. | test.cpp:91:9:91:16 | fread output argument | user input (string read by fread) | test.cpp:93:11:93:14 | strncat output argument | strncat output argument |
-| test.cpp:108:18:108:22 | call to c_str | test.cpp:106:20:106:38 | call to getenv | test.cpp:108:18:108:22 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:106:20:106:38 | call to getenv | user input (an environment variable) | test.cpp:107:31:107:31 | call to operator+ | call to operator+ |
 | test.cpp:108:18:108:22 | call to c_str | test.cpp:106:20:106:38 | call to getenv indirection | test.cpp:108:18:108:22 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:106:20:106:38 | call to getenv indirection | user input (an environment variable) | test.cpp:107:31:107:31 | call to operator+ | call to operator+ |
-| test.cpp:114:25:114:29 | call to c_str | test.cpp:113:20:113:38 | call to getenv | test.cpp:114:25:114:29 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:113:20:113:38 | call to getenv | user input (an environment variable) | test.cpp:114:10:114:23 | call to operator+ | call to operator+ |
-| test.cpp:114:25:114:29 | call to c_str | test.cpp:113:20:113:38 | call to getenv | test.cpp:114:25:114:29 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:113:20:113:38 | call to getenv | user input (an environment variable) | test.cpp:114:17:114:17 | call to operator+ | call to operator+ |
 | test.cpp:114:25:114:29 | call to c_str | test.cpp:113:20:113:38 | call to getenv indirection | test.cpp:114:25:114:29 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:113:20:113:38 | call to getenv indirection | user input (an environment variable) | test.cpp:114:10:114:23 | call to operator+ | call to operator+ |
 | test.cpp:114:25:114:29 | call to c_str | test.cpp:113:20:113:38 | call to getenv indirection | test.cpp:114:25:114:29 | call to c_str indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:113:20:113:38 | call to getenv indirection | user input (an environment variable) | test.cpp:114:17:114:17 | call to operator+ | call to operator+ |
-| test.cpp:120:25:120:28 | call to data | test.cpp:119:20:119:38 | call to getenv | test.cpp:120:10:120:30 | call to data indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:119:20:119:38 | call to getenv | user input (an environment variable) | test.cpp:120:17:120:17 | call to operator+ | call to operator+ |
 | test.cpp:120:25:120:28 | call to data | test.cpp:119:20:119:38 | call to getenv indirection | test.cpp:120:10:120:30 | call to data indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:119:20:119:38 | call to getenv indirection | user input (an environment variable) | test.cpp:120:17:120:17 | call to operator+ | call to operator+ |
 | test.cpp:143:10:143:16 | command | test.cpp:140:9:140:11 | fread output argument | test.cpp:143:10:143:16 | command indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:140:9:140:11 | fread output argument | user input (string read by fread) | test.cpp:142:11:142:17 | sprintf output argument | sprintf output argument |
 | test.cpp:183:32:183:38 | command | test.cpp:174:9:174:16 | fread output argument | test.cpp:183:32:183:38 | command indirection | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to execl. | test.cpp:174:9:174:16 | fread output argument | user input (string read by fread) | test.cpp:177:13:177:17 | strncat output argument | strncat output argument |