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Shared: Improvements to content-sensitive model generation

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This commit is contained in:
Tom Hvitved
2025-11-26 10:33:52 +01:00
parent 464d2cd5fc
commit 666855dbd7
3 changed files with 29 additions and 17 deletions
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15
shared/dataflow/codeql/dataflow/internal/ContentDataFlowImpl.qll
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@@ -75,6 +75,9 @@ module MakeImplContentDataFlow<LocationSig Location, InputSig<Location> Lang> {
/** Gets a limit on the number of reads out of sources and number of stores into sinks. */
default int accessPathLimit() { result = Lang::accessPathLimit() }
/** Gets the access path limit used in the internal invocation of the standard data flow library. */
default int accessPathLimitInternal() { result = Lang::accessPathLimit() }
/** Holds if `c` is relevant for reads out of sources or stores into sinks. */
default predicate isRelevantContent(ContentSet c) { any() }
}
@@ -110,7 +113,7 @@ module MakeImplContentDataFlow<LocationSig Location, InputSig<Location> Lang> {
FlowFeature getAFeature() { result = ContentConfig::getAFeature() }
predicate accessPathLimit = ContentConfig::accessPathLimit/0;
predicate accessPathLimit = ContentConfig::accessPathLimitInternal/0;
// needed to record reads/stores inside summarized callables
predicate includeHiddenNodes() { any() }
@@ -274,6 +277,16 @@ module MakeImplContentDataFlow<LocationSig Location, InputSig<Location> Lang> {
)
}
/**
* Gets the length of this access path.
*/
int length() {
this = TAccessPathNil() and
result = 0
or
result = this.getTail().length() + 1
}
/**
* Gets the content set at index `i` in this access path, if any.
*/