Title: [276542] branches/safari-611.1.21.2-branch/Source/_javascript_Core
- Revision
- 276542
- Author
- [email protected]
- Date
- 2021-04-23 17:26:51 -0700 (Fri, 23 Apr 2021)
Log Message
Cherry-pick r276527. rdar://problem/77092686
[YARR Interpreter] Improper backtrack of parentheses with non-zero based greedy quantifiers
https://bugs.webkit.org/show_bug.cgi?id=224983
Reviewed by Mark Lam.
When we backtrack a parentheses with a greedy non zero based quantifier,
we don't properly restore for the case where we hadn't reached the minimum count.
We now save the input position on entry and restore it when we backtrack for
this case. We also properly release the allocated ParenthesesDisjunctionContext's.
* yarr/YarrInterpreter.cpp:
(JSC::Yarr::Interpreter::matchParentheses):
(JSC::Yarr::Interpreter::backtrackParentheses):
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@276527 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Modified Paths
Diff
Modified: branches/safari-611.1.21.2-branch/Source/_javascript_Core/ChangeLog (276541 => 276542)
--- branches/safari-611.1.21.2-branch/Source/_javascript_Core/ChangeLog 2021-04-24 00:26:48 UTC (rev 276541)
+++ branches/safari-611.1.21.2-branch/Source/_javascript_Core/ChangeLog 2021-04-24 00:26:51 UTC (rev 276542)
@@ -1,3 +1,40 @@
+2021-04-23 Alan Coon <[email protected]>
+
+ Cherry-pick r276527. rdar://problem/77092686
+
+ [YARR Interpreter] Improper backtrack of parentheses with non-zero based greedy quantifiers
+ https://bugs.webkit.org/show_bug.cgi?id=224983
+
+ Reviewed by Mark Lam.
+
+ When we backtrack a parentheses with a greedy non zero based quantifier,
+ we don't properly restore for the case where we hadn't reached the minimum count.
+ We now save the input position on entry and restore it when we backtrack for
+ this case. We also properly release the allocated ParenthesesDisjunctionContext's.
+
+ * yarr/YarrInterpreter.cpp:
+ (JSC::Yarr::Interpreter::matchParentheses):
+ (JSC::Yarr::Interpreter::backtrackParentheses):
+
+
+ git-svn-id: https://svn.webkit.org/repository/webkit/trunk@276527 268f45cc-cd09-0410-ab3c-d52691b4dbfc
+
+ 2021-04-23 Michael Saboff <[email protected]>
+
+ [YARR Interpreter] Improper backtrack of parentheses with non-zero based greedy quantifiers
+ https://bugs.webkit.org/show_bug.cgi?id=224983
+
+ Reviewed by Mark Lam.
+
+ When we backtrack a parentheses with a greedy non zero based quantifier,
+ we don't properly restore for the case where we hadn't reached the minimum count.
+ We now save the input position on entry and restore it when we backtrack for
+ this case. We also properly release the allocated ParenthesesDisjunctionContext's.
+
+ * yarr/YarrInterpreter.cpp:
+ (JSC::Yarr::Interpreter::matchParentheses):
+ (JSC::Yarr::Interpreter::backtrackParentheses):
+
2021-02-17 Ruben Turcios <[email protected]>
Cherry-pick r271767. rdar://problem/74409412
Modified: branches/safari-611.1.21.2-branch/Source/_javascript_Core/yarr/YarrInterpreter.cpp (276541 => 276542)
--- branches/safari-611.1.21.2-branch/Source/_javascript_Core/yarr/YarrInterpreter.cpp 2021-04-24 00:26:48 UTC (rev 276541)
+++ branches/safari-611.1.21.2-branch/Source/_javascript_Core/yarr/YarrInterpreter.cpp 2021-04-24 00:26:51 UTC (rev 276542)
@@ -45,6 +45,7 @@
struct ParenthesesDisjunctionContext;
struct BackTrackInfoParentheses {
+ uintptr_t begin;
uintptr_t matchAmount;
ParenthesesDisjunctionContext* lastContext;
};
@@ -1015,6 +1016,7 @@
BackTrackInfoParentheses* backTrack = reinterpret_cast<BackTrackInfoParentheses*>(context->frame + term.frameLocation);
ByteDisjunction* disjunctionBody = term.atom.parenthesesDisjunction;
+ backTrack->begin = input.getPos();
backTrack->matchAmount = 0;
backTrack->lastContext = nullptr;
@@ -1168,8 +1170,20 @@
popParenthesesDisjunctionContext(backTrack);
freeParenthesesDisjunctionContext(context);
- if (result != JSRegExpNoMatch || backTrack->matchAmount < term.atom.quantityMinCount)
+ if (backTrack->matchAmount < term.atom.quantityMinCount) {
+ while (backTrack->matchAmount) {
+ context = backTrack->lastContext;
+ resetMatches(term, context);
+ popParenthesesDisjunctionContext(backTrack);
+ freeParenthesesDisjunctionContext(context);
+ }
+
+ input.setPos(backTrack->begin);
return result;
+ }
+
+ if (result != JSRegExpNoMatch)
+ return result;
}
if (backTrack->matchAmount) {
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