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C++: Implement ContentApprox

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This commit is contained in:
Tom Hvitved
2022-12-09 10:41:57 +01:00
parent 0c2eee2a72
commit bc58cbec8c
3 changed files with 21 additions and 0 deletions
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7
cpp/ql/lib/experimental/semmle/code/cpp/ir/dataflow/internal/DataFlowPrivate.qll
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@@ -551,6 +551,13 @@ predicate additionalLambdaFlowStep(Node nodeFrom, Node nodeTo, boolean preserves
*/
predicate allowParameterReturnInSelf(ParameterNode p) { none() }
/** An approximated `Content`. */
class ContentApprox = Unit;
/** Gets an approximated value for content `c`. */
pragma[inline]
ContentApprox getContentApprox(Content c) { any() }
private class MyConsistencyConfiguration extends Consistency::ConsistencyConfiguration {
override predicate argHasPostUpdateExclude(ArgumentNode n) {
// The rules for whether an IR argument gets a post-update node are too

7
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowPrivate.qll
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@@ -296,6 +296,13 @@ predicate additionalLambdaFlowStep(Node nodeFrom, Node nodeTo, boolean preserves
*/
predicate allowParameterReturnInSelf(ParameterNode p) { none() }
/** An approximated `Content`. */
class ContentApprox = Unit;
/** Gets an approximated value for content `c`. */
pragma[inline]
ContentApprox getContentApprox(Content c) { any() }
private class MyConsistencyConfiguration extends Consistency::ConsistencyConfiguration {
override predicate argHasPostUpdateExclude(ArgumentNode n) {
// Is the null pointer (or something that's not really a pointer)

7
cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowPrivate.qll
View File

@@ -400,6 +400,13 @@ predicate additionalLambdaFlowStep(Node nodeFrom, Node nodeTo, boolean preserves
*/
predicate allowParameterReturnInSelf(ParameterNode p) { none() }
/** An approximated `Content`. */
class ContentApprox = Unit;
/** Gets an approximated value for content `c`. */
pragma[inline]
ContentApprox getContentApprox(Content c) { any() }
private class MyConsistencyConfiguration extends Consistency::ConsistencyConfiguration {
override predicate argHasPostUpdateExclude(ArgumentNode n) {
// The rules for whether an IR argument gets a post-update node are too