grep: under --debug, show whether PCRE JIT is enabled

This information is useful and not visible anywhere else, so show it.

Signed-off-by: Beat Bolli <dev+git@drbeat.li>
Suggested-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/grep.c b/grep.c
index c7c06ae08dd178614a11ae290a63605af01d2c6f..76088784e36300837feb04d6f3a9ac3d5bcc0e41 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -394,6 +394,8 @@ static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
 
 #ifdef GIT_PCRE1_USE_JIT
        pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
+       if (opt->debug)
+               fprintf(stderr, "pcre1_jit_on=%d\n", p->pcre1_jit_on);
 #endif
 }
 
@@ -490,6 +492,8 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt
        }
 
        pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
+       if (opt->debug)
+               fprintf(stderr, "pcre2_jit_on=%d\n", p->pcre2_jit_on);
        if (p->pcre2_jit_on) {
                jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
                if (jitret)
@@ -515,6 +519,9 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt
                        BUG("pcre2_pattern_info() failed: %d", patinforet);
                if (jitsizearg == 0) {
                        p->pcre2_jit_on = 0;
+                       if (opt->debug)
+                               fprintf(stderr, "pcre2_jit_on=%d: (*NO_JIT) in regex\n",
+                                       p->pcre2_jit_on);
                        return;
                }
        }