add retry limit counter overflow check in DEBUG mode

kkos · Jun 23, 2024 · 25cf18b · 25cf18b
1 parent bcfbab2
commit 25cf18b
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/src/regexec.c b/src/regexec.c
@@ -4478,6 +4478,13 @@ match_at(regex_t* reg, const UChar* str, const UChar* end,
 
  match_at_end:
   if (msa->retry_limit_in_search != 0) {
+#ifdef ONIG_DEBUG
+    if (retry_in_match_counter >
+        ULONG_MAX - msa->retry_limit_in_search_counter) {
+      fprintf(DBGFP, "retry limit counter overflow: %8lu/%8lu\n",
+              retry_in_match_counter, msa->retry_limit_in_search_counter);
+    }
+#endif
     msa->retry_limit_in_search_counter += retry_in_match_counter;
   }
 

diff --git a/src/regint.h b/src/regint.h
@@ -37,6 +37,7 @@
 /* #define ONIG_DEBUG_MATCH_COUNTER */
 /* #define ONIG_DEBUG_CALL */
 /* #define ONIG_DONT_OPTIMIZE */
+/* #define ONIG_DEBUG */
 
 /* for byte-code statistical data. */
 /* #define ONIG_DEBUG_STATISTICS */
@@ -47,10 +48,13 @@
     defined(ONIG_DEBUG_STATISTICS)
 #ifndef ONIG_DEBUG
 #define ONIG_DEBUG
-#define DBGFP   stderr
 #endif
 #endif
 
+#ifdef ONIG_DEBUG
+#define DBGFP   stderr
+#endif
+
 #ifndef ONIG_DISABLE_DIRECT_THREADING
 #ifdef __GNUC__
 #define USE_GOTO_LABELS_AS_VALUES