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Jave: Use force local to make parsing local after global regex finding.

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This commit is contained in:
Alex Eyers-Taylor
2025-08-21 19:48:21 +01:00
parent 7670a2bd77
commit 2201974844
1 changed files with 9 additions and 5 deletions
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14
java/ql/lib/semmle/code/java/regex/RegexFlowConfigs.qll
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@@ -163,6 +163,12 @@ private module RegexFlowConfig implements DataFlow::ConfigSig {
private module RegexFlow = DataFlow::Global<RegexFlowConfig>;
private predicate usedAsRegexImpl(StringLiteral regex, string mode, boolean match_full_string) {
RegexFlow::flow(DataFlow::exprNode(regex), _) and
mode = "None" and // TODO: proper mode detection
(if matchesFullString(regex) then match_full_string = true else match_full_string = false)
}
/**
* Holds if `regex` is used as a regex, with the mode `mode` (if known).
* If regex mode is not known, `mode` will be `"None"`.
@@ -170,11 +176,9 @@ private module RegexFlow = DataFlow::Global<RegexFlowConfig>;
* As an optimisation, only regexes containing an infinite repitition quatifier (`+`, `*`, or `{x,}`)
* and therefore may be relevant for ReDoS queries are considered.
*/
predicate usedAsRegex(StringLiteral regex, string mode, boolean match_full_string) {
RegexFlow::flow(DataFlow::exprNode(regex), _) and
mode = "None" and // TODO: proper mode detection
(if matchesFullString(regex) then match_full_string = true else match_full_string = false)
}
overlay[local]
predicate usedAsRegex(StringLiteral regex, string mode, boolean match_full_string) =
forceLocal(usedAsRegexImpl/3)(regex, mode, match_full_string)
/**
* Holds if `regex` is used as a regular expression that is matched against a full string,