[GR-18889] TRegex: fix race condition when switching to DFA matcher.

PullRequest: graal/4621
mttcr · Oct 15, 2019 · 0c17081 · 0c17081
2 parents f17c377 + 41b0640
commit 0c17081
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/...om.oracle.truffle.regex/src/com/oracle/truffle/regex/tregex/nodes/TRegexExecRootNode.java b/...om.oracle.truffle.regex/src/com/oracle/truffle/regex/tregex/nodes/TRegexExecRootNode.java
@@ -199,7 +199,7 @@ public RegexProfile getRegexProfile() {
         return regexProfile;
     }
 
-    private void switchToLazyDFA() {
+    private synchronized void switchToLazyDFA() {
         compileLazyDFA();
         if (lazyDFANode != LAZY_DFA_BAILED_OUT) {
             runnerNode = insert(lazyDFANode);