From: K.Kosako <kosako@sofnec.co.jp>
Date: Tue, 27 Aug 2019 04:20:16 +0000 (+0900)
Subject: add backtrack_mem member into ScanEnv
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=94e5a2198dd529e8908de1bdcdec9910fc4be7c7;p=onig

add backtrack_mem member into ScanEnv
---

diff --git a/src/regcomp.c b/src/regcomp.c
index ec714a1..1bd0549 100644
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -3706,8 +3706,10 @@ recursive_call_check_trav(Node* node, ScanEnv* env, int state)
           if (! NODE_IS_RECURSION(node)) {
             NODE_STATUS_ADD(node, MARK1);
             r = recursive_call_check(NODE_BODY(node));
-            if (r != 0)
+            if (r != 0) {
               NODE_STATUS_ADD(node, RECURSION);
+              MEM_STATUS_ON(env->backtrack_mem, en->m.regnum);
+            }
             NODE_STATUS_REMOVE(node, MARK1);
           }
 
@@ -4985,6 +4987,7 @@ setup_tree(Node* node, regex_t* reg, int state, ScanEnv* env)
         if ((state & (IN_ALT | IN_NOT | IN_VAR_REPEAT | IN_MULTI_ENTRY)) != 0
             || NODE_IS_RECURSION(node)) {
           MEM_STATUS_ON(env->st_mem_start, en->m.regnum);
+          MEM_STATUS_ON(env->backtrack_mem, en->m.regnum);
         }
         r = setup_tree(NODE_BODY(node), reg, state, env);
         break;
diff --git a/src/regparse.c b/src/regparse.c
index 5d667cd..7ba4b26 100644
--- a/src/regparse.c
+++ b/src/regparse.c
@@ -1948,6 +1948,7 @@ scan_env_clear(ScanEnv* env)
   MEM_STATUS_CLEAR(env->cap_history);
   MEM_STATUS_CLEAR(env->st_mem_start);
   MEM_STATUS_CLEAR(env->st_mem_end);
+  MEM_STATUS_CLEAR(env->backtrack_mem);
   MEM_STATUS_CLEAR(env->backrefed_mem);
   env->error      = (UChar* )NULL;
   env->error_end  = (UChar* )NULL;
diff --git a/src/regparse.h b/src/regparse.h
index 0ee42d4..bb346a1 100644
--- a/src/regparse.h
+++ b/src/regparse.h
@@ -401,6 +401,7 @@ typedef struct {
   MemStatusType    cap_history;
   MemStatusType    st_mem_start;
   MemStatusType    st_mem_end;
+  MemStatusType    backtrack_mem; /* backtrack/recursion */
   MemStatusType    backrefed_mem;
   UChar*           pattern;
   UChar*           pattern_end;