[njs] RegExp: improved memory footprint when match fails.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/88318e18dec9
branches:  
changeset: 2211:88318e18dec9
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Thu Sep 28 19:09:56 2023 -0700
description:
RegExp: improved memory footprint when match fails.

diffstat:

 src/njs_regexp.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (33 lines):

diff -r febba7cb31e0 -r 88318e18dec9 src/njs_regexp.c
--- a/src/njs_regexp.c	Thu Sep 28 18:11:15 2023 -0700
+++ b/src/njs_regexp.c	Thu Sep 28 19:09:56 2023 -0700
@@ -941,6 +941,9 @@ njs_regexp_builtin_exec(njs_vm_t *vm, nj
                            string.size, match_data);
     if (ret >= 0) {
         result = njs_regexp_exec_result(vm, r, utf8, &string, match_data);
+
+        njs_regex_match_data_free(match_data, vm->regex_generic_ctx);
+
         if (njs_slow_path(result == NULL)) {
             return NJS_ERROR;
         }
@@ -949,8 +952,9 @@ njs_regexp_builtin_exec(njs_vm_t *vm, nj
         return NJS_OK;
     }
 
+    njs_regex_match_data_free(match_data, vm->regex_generic_ctx);
+
     if (njs_slow_path(ret == NJS_ERROR)) {
-        njs_regex_match_data_free(match_data, vm->regex_generic_ctx);
         return NJS_ERROR;
     }
 
@@ -1154,8 +1158,6 @@ fail:
 
 done:
 
-    njs_regex_match_data_free(match_data, vm->regex_generic_ctx);
-
     return (ret == NJS_OK) ? array : NULL;
 }