This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
eliminate PL_regindent and improve -Mre=Debug,STATE output
authorDave Mitchell <davem@fdisolutions.com>
Mon, 25 Sep 2006 01:23:31 +0000 (01:23 +0000)
committerDave Mitchell <davem@fdisolutions.com>
Mon, 25 Sep 2006 01:23:31 +0000 (01:23 +0000)
p4raw-id: //depot/perl@28885

perl.c
regexec.c
regexp.h

diff --git a/perl.c b/perl.c
index be381b9..c15874a 100644 (file)
--- a/perl.c
+++ b/perl.c
@@ -3478,7 +3478,6 @@ S_init_interp(pTHX)
 
     /* As these are inside a structure, PERLVARI isn't capable of initialising
        them  */
-    PL_regindent = 0;
     PL_reg_oldcurpm = PL_reg_curpm = NULL;
     PL_reg_poscache = PL_reg_starttry = NULL;
 }
index 7fbd1db..5696ef4 100644 (file)
--- a/regexec.c
+++ b/regexec.c
@@ -2072,9 +2072,6 @@ S_regtry(pTHX_ const regmatch_info *reginfo, char *startpos)
     regexp *prog = reginfo->prog;
     GET_RE_DEBUG_FLAGS_DECL;
 
-#ifdef DEBUGGING
-    PL_regindent = 0;  /* XXXX Not good when matches are reenterable... */
-#endif
     if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) {
        MAGIC *mg;
 
@@ -2408,10 +2405,47 @@ S_push_slab(pTHX)
 #define CURLY_B_max            (REGNODE_MAX+24)
 #define CURLY_B_max_fail       (REGNODE_MAX+25)
 
+#define DEBUG_STATE_pp(pp)                                 \
+    DEBUG_STATE_r(                                         \
+       DUMP_EXEC_POS(locinput, scan, do_utf8);             \
+       PerlIO_printf(Perl_debug_log,                       \
+           "    %*s"pp" %s\n",                             \
+           depth*2, "",                                    \
+           state_names[st->resume_state-REGNODE_MAX-1] )   \
+    );
+
 
 #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
 
 #ifdef DEBUGGING
+static const char * const state_names[] = {
+   "TRIE_next",
+   "TRIE_next_fail",
+   "EVAL_AB",
+   "EVAL_AB_fail",
+   "resume_CURLYX",
+   "resume_WHILEM1",
+   "resume_WHILEM2",
+   "resume_WHILEM3",
+   "resume_WHILEM4",
+   "resume_WHILEM5",
+   "resume_WHILEM6",
+   "BRANCH_next",
+   "BRANCH_next_fail",
+   "CURLYM_A",
+   "CURLYM_A_fail",
+   "CURLYM_B",
+   "CURLYM_B_fail",
+   "IFMATCH_A",
+   "IFMATCH_A_fail",
+   "CURLY_B_min_known",
+   "CURLY_B_min_known_fail",
+   "CURLY_B_min",
+   "CURLY_B_min_fail",
+   "CURLY_B_max",
+   "CURLY_B_max_fail"
+};
+
 STATIC void
 S_debug_start_match(pTHX_ const regexp *prog, const bool do_utf8, 
     const char *start, const char *end, const char *blurb)
@@ -2538,7 +2572,6 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
 
 #ifdef DEBUGGING
     GET_RE_DEBUG_FLAGS_DECL;
-    PL_regindent++;
 #endif
 
     /* on first ever call to regmatch, allocate first slab */
@@ -2577,7 +2610,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
             
            PerlIO_printf(Perl_debug_log,
                    "%3"IVdf":%*s%s(%"IVdf")\n",
-                   (IV)(scan - rex->program), PL_regindent*2, "",
+                   (IV)(scan - rex->program), depth*2, "",
                    SvPVX_const(prop),
                    (PL_regkind[OP(scan)] == END || !rnext) ? 
                        0 : (IV)(rnext - rex->program));
@@ -2670,7 +2703,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                     DEBUG_EXECUTE_r(
                         PerlIO_printf(Perl_debug_log,
                                  "%*s  %sfailed to match trie start class...%s\n",
-                                 REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4], PL_colors[5])
+                                 REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
                     );
                     sayNO_SILENT;
                     /* NOTREACHED */
@@ -2697,14 +2730,14 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                         DEBUG_EXECUTE_r(
                             PerlIO_printf(Perl_debug_log,
                                          "%*s  %smatched empty string...%s\n",
-                                         REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4], PL_colors[5])
+                                         REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
                         );
                        break;
                    } else {
                        DEBUG_EXECUTE_r(
                             PerlIO_printf(Perl_debug_log,
                                          "%*s  %sfailed to match trie start class...%s\n",
-                                         REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4], PL_colors[5])
+                                         REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
                         );
                        sayNO_SILENT;
                   }
@@ -2783,7 +2816,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                                DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
                                PerlIO_printf( Perl_debug_log,
                                    "%*s  %sState: %4"UVxf" Accepted: %4"UVxf" ",
-                                   2+PL_regindent * 2, "", PL_colors[4],
+                                   2+depth * 2, "", PL_colors[4],
                                    (UV)state, (UV)ST.accepted );
                    });
 
@@ -2822,7 +2855,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                DEBUG_EXECUTE_r(
                    PerlIO_printf( Perl_debug_log,
                        "%*s  %sgot %"IVdf" possible matches%s\n",
-                       REPORT_CODE_OFF + PL_regindent * 2, "",
+                       REPORT_CODE_OFF + depth * 2, "",
                        PL_colors[4], (IV)ST.accepted, PL_colors[5] );
                );
            }}
@@ -2841,7 +2874,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                                    : NULL;
                    PerlIO_printf( Perl_debug_log,
                        "%*s  %sonly one match left: #%d <%s>%s\n",
-                       REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],
+                       REPORT_CODE_OFF+depth*2, "", PL_colors[4],
                        ST.accept_buff[ 0 ].wordnum,
                        tmp ? SvPV_nolen_const( *tmp ) : "not compiled under -Dr",
                        PL_colors[5] );
@@ -2887,7 +2920,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                    DEBUG_TRIE_EXECUTE_r(
                        PerlIO_printf( Perl_debug_log,
                            "%*s  %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
-                           REPORT_CODE_OFF + PL_regindent * 2, "", PL_colors[4],
+                           REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
                            (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
                            ST.accept_buff[ cur ].wordnum, PL_colors[5] );
                    );
@@ -2904,7 +2937,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                                ? av_fetch( trie->words, ST.accept_buff[ best ].wordnum - 1, 0 )
                                : NULL;
                    PerlIO_printf( Perl_debug_log, "%*s  %strying alternation #%d <%s> at node #%d %s\n",
-                       REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],
+                       REPORT_CODE_OFF+depth*2, "", PL_colors[4],
                        ST.accept_buff[best].wordnum,
                        tmp ? SvPV_nolen_const( *tmp ) : "not compiled under -Dr", REG_NODE_NUM(scan),
                        PL_colors[5] );
@@ -3668,7 +3701,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                DEBUG_EXECUTE_r(
                    PerlIO_printf(Perl_debug_log,
                                  "%*s  %ld out of %ld..%ld  cc=%"UVxf"\n",
-                                 REPORT_CODE_OFF+PL_regindent*2, "",
+                                 REPORT_CODE_OFF+depth*2, "",
                                  (long)n, (long)cur_curlyx->u.curlyx.min,
                                  (long)cur_curlyx->u.curlyx.max,
                                  PTR2UV(cur_curlyx))
@@ -3686,7 +3719,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                    DEBUG_EXECUTE_r(
                        PerlIO_printf(Perl_debug_log,
                           "%*s  empty match detected, try continuation...\n",
-                          REPORT_CODE_OFF+PL_regindent*2, "")
+                          REPORT_CODE_OFF+depth*2, "")
                        );
                    REGMATCH(st->u.whilem.savecc->next, WHILEM1);
                    /*** all unsaved local vars undefined at this point */
@@ -3753,7 +3786,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                    DEBUG_EXECUTE_r(
                        PerlIO_printf(Perl_debug_log,
                                      "%*s  already tried at this position...\n",
-                                     REPORT_CODE_OFF+PL_regindent*2, "")
+                                     REPORT_CODE_OFF+depth*2, "")
                        );
                        sayNO; /* cache records failure */
                    }
@@ -3795,7 +3828,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                    DEBUG_EXECUTE_r(
                        PerlIO_printf(Perl_debug_log,
                                      "%*s  trying longer...\n",
-                                     REPORT_CODE_OFF+PL_regindent*2, "")
+                                     REPORT_CODE_OFF+depth*2, "")
                        );
                    /* Try scanning more and see if it helps. */
                    PL_reginput = locinput;
@@ -3835,7 +3868,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                    DEBUG_EXECUTE_r(
                        PerlIO_printf(Perl_debug_log,
                                      "%*s  failed, try continuation...\n",
-                                     REPORT_CODE_OFF+PL_regindent*2, "")
+                                     REPORT_CODE_OFF+depth*2, "")
                        );
                }
                if (ckWARN(WARN_REGEXP) && n >= REG_INFTY
@@ -3967,7 +4000,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
            DEBUG_EXECUTE_r(
                PerlIO_printf(Perl_debug_log,
                          "%*s  CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
-                         (int)(REPORT_CODE_OFF+(PL_regindent*2)), "",
+                         (int)(REPORT_CODE_OFF+(depth*2)), "",
                          (IV) ST.count, (IV)ST.alen)
            );
 
@@ -4008,7 +4041,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
            DEBUG_EXECUTE_r(
                PerlIO_printf(Perl_debug_log,
                    "%*s  CURLYM trying tail with matches=%"IVdf"...\n",
-                   (int)(REPORT_CODE_OFF+(PL_regindent*2)),
+                   (int)(REPORT_CODE_OFF+(depth*2)),
                    "", (IV)ST.count)
                );
            if (ST.c1 != CHRTEST_VOID
@@ -4374,7 +4407,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
                cur_eval = cur_eval->u.eval.prev_eval;
                DEBUG_EXECUTE_r(
                    PerlIO_printf(Perl_debug_log, "%*s  EVAL trying tail ...\n",
-                                     REPORT_CODE_OFF+PL_regindent*2, ""););
+                                     REPORT_CODE_OFF+depth*2, ""););
                PUSH_YES_STATE_GOTO(EVAL_AB,
                        st->u.eval.prev_eval->u.eval.B); /* match B */
            }
@@ -4395,7 +4428,7 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
            DEBUG_EXECUTE_r(
            PerlIO_printf(Perl_debug_log,
                "%*s  %ssubpattern success...%s\n",
-               REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4], PL_colors[5]));
+               REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
            PL_reginput = locinput;     /* put where regtry can find it */
            sayYES_FINAL;               /* Success! */
 
@@ -4490,9 +4523,8 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
        {
            regmatch_state *newst;
 
+           DEBUG_STATE_pp("push");
            depth++;
-           DEBUG_STATE_r(PerlIO_printf(Perl_debug_log,
-                       "PUSH STATE(%d)\n", depth));
            st->locinput = locinput;
            newst = st+1; 
            if (newst >  SLAB_LAST(PL_regmatch_slab))
@@ -4521,8 +4553,8 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
            /* push new state */
            regmatch_state *oldst = st;
 
+           DEBUG_STATE_pp("push");
            depth++;
-           DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "PUSH RECURSE STATE(%d)\n", depth));
 
            /* grab the next free state slot */
            st++;
@@ -4540,9 +4572,6 @@ S_regmatch(pTHX_ const regmatch_info *reginfo, regnode *prog)
            st->sw = 0;
            st->logical = 0;
            
-#ifdef DEBUGGING
-           PL_regindent++;
-#endif
        }
     }
 
@@ -4562,6 +4591,17 @@ yes_final:
        /* we have successfully completed a subexpression, but we must now
         * pop to the state marked by yes_state and continue from there */
        assert(st != yes_state);
+#ifdef DEBUGGING
+       while (st != yes_state) {
+           st--;
+           if (st < SLAB_FIRST(PL_regmatch_slab)) {
+               PL_regmatch_slab = PL_regmatch_slab->prev;
+               st = SLAB_LAST(PL_regmatch_slab);
+           }
+           DEBUG_STATE_pp("pop (yes)");
+           depth--;
+       }
+#else
        while (yes_state < SLAB_FIRST(PL_regmatch_slab)
            || yes_state > SLAB_LAST(PL_regmatch_slab))
        {
@@ -4571,8 +4611,7 @@ yes_final:
            st = SLAB_LAST(PL_regmatch_slab);
        }
        depth -= (st - yes_state);
-       DEBUG_STATE_r(PerlIO_printf(Perl_debug_log, "POP STATES (%"UVuf"..%"UVuf")\n",
-           (UV)(depth+1), (UV)(depth+(st - yes_state))));
+#endif
        st = yes_state;
        yes_state = st->u.yes.prev_yes_state;
        PL_regmatch_state = st;
@@ -4596,17 +4635,12 @@ yes_final:
     DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
                          PL_colors[4], PL_colors[5]));
 yes:
-#ifdef DEBUGGING
-    PL_regindent--;
-#endif
 
     result = 1;
     /* XXX this is duplicate(ish) code to that in the do_no section.
      * will disappear when REGFMATCH goes */
     if (depth) {
        /* restore previous state and re-enter */
-       DEBUG_STATE_r(PerlIO_printf(Perl_debug_log, "POP STATE(%d)\n", depth));
-       depth--;
        st--;
        if (st < SLAB_FIRST(PL_regmatch_slab)) {
            PL_regmatch_slab = PL_regmatch_slab->prev;
@@ -4619,6 +4653,9 @@ yes:
        locinput= st->locinput;
        nextchr = UCHARAT(locinput);
 
+       DEBUG_STATE_pp("pop");
+       depth--;
+
        switch (st->resume_state) {
        case resume_CURLYX:
            goto resume_point_CURLYX;
@@ -4656,21 +4693,16 @@ no:
     DEBUG_EXECUTE_r(
        PerlIO_printf(Perl_debug_log,
             "%*s  %sfailed...%s\n",
-            REPORT_CODE_OFF+PL_regindent*2, "", 
+            REPORT_CODE_OFF+depth*2, "", 
             PL_colors[4], PL_colors[5])
        );
 no_final:
 do_no:
 
-#ifdef DEBUGGING
-    PL_regindent--;
-#endif
     result = 0;
 
     if (depth) {
        /* there's a previous state to backtrack to */
-       DEBUG_STATE_r(PerlIO_printf(Perl_debug_log, "POP STATE(%d)\n", depth));
-       depth--;
        st--;
        if (st < SLAB_FIRST(PL_regmatch_slab)) {
            PL_regmatch_slab = PL_regmatch_slab->prev;
@@ -4683,6 +4715,9 @@ do_no:
        locinput= st->locinput;
        nextchr = UCHARAT(locinput);
 
+       DEBUG_STATE_pp("pop");
+       depth--;
+
        switch (st->resume_state) {
        case resume_CURLYX:
            goto resume_point_CURLYX;
index 36b2f7f..263ccfa 100644 (file)
--- a/regexp.h
+++ b/regexp.h
@@ -314,7 +314,6 @@ typedef struct regmatch_slab {
 #define PL_reg_start_tmp       PL_reg_state.re_state_reg_start_tmp
 #define PL_reg_start_tmpl      PL_reg_state.re_state_reg_start_tmpl
 #define PL_reg_eval_set                PL_reg_state.re_state_reg_eval_set
-#define PL_regindent           PL_reg_state.re_state_regindent
 #define PL_reg_match_utf8      PL_reg_state.re_state_reg_match_utf8
 #define PL_reg_magic           PL_reg_state.re_state_reg_magic
 #define PL_reg_oldpos          PL_reg_state.re_state_reg_oldpos
@@ -342,7 +341,6 @@ struct re_save_state {
     char **re_state_reg_start_tmp;     /* from regexec.c */
     U32 re_state_reg_start_tmpl;       /* from regexec.c */
     I32 re_state_reg_eval_set;         /* from regexec.c */
-    int re_state_regindent;            /* from regexec.c */
     bool re_state_reg_match_utf8;      /* from regexec.c */
     MAGIC *re_state_reg_magic;         /* from regexec.c */
     I32 re_state_reg_oldpos;           /* from regexec.c */