This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Add more tests for the builtin source filter implementation, and fix
[perl5.git] / pp_ctl.c
index 7ff4858..364a1d5 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -284,8 +284,12 @@ PP(pp_substcont)
        if (SvTYPE(sv) < SVt_PVMG)
            SvUPGRADE(sv, SVt_PVMG);
        if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
-           sv_magic(sv, NULL, PERL_MAGIC_regex_global, NULL, 0);
-           mg = mg_find(sv, PERL_MAGIC_regex_global);
+#ifdef PERL_OLD_COPY_ON_WRITE
+           if (SvIsCOW(lsv))
+               sv_force_normal_flags(sv, 0);
+#endif
+           mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
+                            NULL, 0);
        }
        i = m - orig;
        if (DO_UTF8(sv))
@@ -376,7 +380,7 @@ Perl_rxres_free(pTHX_ void **rsp)
        void *tmp = INT2PTR(char*,*p);
        Safefree(tmp);
        if (*p)
-           Poison(*p, 1, sizeof(*p));
+           PoisonFree(*p, 1, sizeof(*p));
 #else
        Safefree(INT2PTR(char*,*p));
 #endif
@@ -1616,7 +1620,7 @@ PP(pp_caller)
        RETURN;
     }
 
-    EXTEND(SP, 10);
+    EXTEND(SP, 11);
 
     if (!stashname)
        PUSHs(&PL_sv_undef);
@@ -1691,11 +1695,10 @@ PP(pp_caller)
     /* XXX only hints propagated via op_private are currently
      * visible (others are not easily accessible, since they
      * use the global PL_hints) */
-    PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
-                            HINT_PRIVATE_MASK)));
+    PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
     {
        SV * mask ;
-       SV * const old_warnings = cx->blk_oldcop->cop_warnings ;
+       STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
 
        if  (old_warnings == pWARN_NONE ||
                (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
@@ -1714,9 +1717,15 @@ PP(pp_caller)
            }
        }
         else
-            mask = newSVsv(old_warnings);
+            mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
         PUSHs(sv_2mortal(mask));
     }
+
+    PUSHs(cx->blk_oldcop->cop_hints ?
+         sv_2mortal(newRV_noinc(
+               (SV*)Perl_refcounted_he_chain_2hv(aTHX_
+                                                 cx->blk_oldcop->cop_hints)))
+         : &PL_sv_undef);
     RETURN;
 }
 
@@ -2498,7 +2507,7 @@ PP(pp_goto)
 
        /* find label */
 
-       PL_lastgotoprobe = 0;
+       PL_lastgotoprobe = NULL;
        *enterops = 0;
        for (ix = cxstack_ix; ix >= 0; ix--) {
            cx = &cxstack[ix];
@@ -2805,7 +2814,7 @@ Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
     *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
     LEAVE;
     if (IN_PERL_COMPILETIME)
-       PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);
+       CopHINTS_set(&PL_compiling, PL_hints);
 #ifdef OP_IN_REGISTER
     op = PL_opsave;
 #endif
@@ -2915,7 +2924,7 @@ S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
     PL_eval_root = NULL;
     PL_error_count = 0;
     PL_curcop = &PL_compiling;
-    PL_curcop->cop_arybase = 0;
+    CopARYBASE_set(PL_curcop, 0);
     if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
        PL_in_eval |= EVAL_KEEPERR;
     else
@@ -3011,14 +3020,10 @@ S_check_type_and_open(pTHX_ const char *name, const char *mode)
 {
     Stat_t st;
     const int st_rc = PerlLIO_stat(name, &st);
-    if (st_rc < 0) {
+    if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
        return NULL;
     }
 
-    if(S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
-       Perl_die(aTHX_ "%s %s not allowed in require",
-           S_ISDIR(st.st_mode) ? "Directory" : "Block device", name);
-    }
     return PerlIO_open(name, mode);
 }
 
@@ -3037,15 +3042,7 @@ S_doopen_pm(pTHX_ const char *name, const char *mode)
            fp = check_type_and_open(name, mode);
        }
        else {
-           Stat_t pmstat;
-           if (PerlLIO_stat(name, &pmstat) < 0 ||
-               pmstat.st_mtime < pmcstat.st_mtime)
-           {
-               fp = check_type_and_open(pmc, mode);
-           }
-           else {
-               fp = check_type_and_open(name, mode);
-           }
+           fp = check_type_and_open(pmc, mode);
        }
        SvREFCNT_dec(pmcsv);
     }
@@ -3223,7 +3220,8 @@ PP(pp_require)
                            }
 
                            if (!tryrsfp) {
-                               tryrsfp = PerlIO_open("/dev/null", PERL_SCRIPT_MODE);
+                               tryrsfp = PerlIO_open(BIT_BUCKET,
+                                                     PERL_SCRIPT_MODE);
                            }
                        }
                        SP--;
@@ -3366,13 +3364,15 @@ PP(pp_require)
     PL_rsfp = tryrsfp;
     SAVEHINTS();
     PL_hints = 0;
-    SAVESPTR(PL_compiling.cop_warnings);
+    SAVECOMPILEWARNINGS();
     if (PL_dowarn & G_WARN_ALL_ON)
         PL_compiling.cop_warnings = pWARN_ALL ;
     else if (PL_dowarn & G_WARN_ALL_OFF)
         PL_compiling.cop_warnings = pWARN_NONE ;
-    else if (PL_taint_warn)
-        PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
+    else if (PL_taint_warn) {
+        PL_compiling.cop_warnings
+           = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
+    }
     else
         PL_compiling.cop_warnings = pWARN_STD ;
     SAVESPTR(PL_compiling.cop_io);
@@ -3464,13 +3464,8 @@ PP(pp_entereval)
     PL_hints = PL_op->op_targ;
     if (saved_hh)
        GvHV(PL_hintgv) = saved_hh;
-    SAVESPTR(PL_compiling.cop_warnings);
-    if (specialWARN(PL_curcop->cop_warnings))
-        PL_compiling.cop_warnings = PL_curcop->cop_warnings;
-    else {
-        PL_compiling.cop_warnings = newSVsv(PL_curcop->cop_warnings);
-        SAVEFREESV(PL_compiling.cop_warnings);
-    }
+    SAVECOMPILEWARNINGS();
+    PL_compiling.cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings);
     SAVESPTR(PL_compiling.cop_io);
     if (specialCopIO(PL_curcop->cop_io))
         PL_compiling.cop_io = PL_curcop->cop_io;
@@ -3478,6 +3473,15 @@ PP(pp_entereval)
         PL_compiling.cop_io = newSVsv(PL_curcop->cop_io);
         SAVEFREESV(PL_compiling.cop_io);
     }
+    if (PL_compiling.cop_hints) {
+       Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints);
+    }
+    PL_compiling.cop_hints = PL_curcop->cop_hints;
+    if (PL_compiling.cop_hints) {
+       HINTS_REFCNT_LOCK;
+       PL_compiling.cop_hints->refcounted_he_refcnt++;
+       HINTS_REFCNT_UNLOCK;
+    }
     /* special case: an eval '' executed within the DB package gets lexically
      * placed in the first non-DB CV rather than the current CV - this
      * allows the debugger to execute code, find lexicals etc, in the
@@ -3570,22 +3574,57 @@ PP(pp_leaveeval)
     RETURNOP(retop);
 }
 
-PP(pp_entertry)
+/* Common code for Perl_call_sv and Perl_fold_constants, put here to keep it
+   close to the related Perl_create_eval_scope.  */
+void
+Perl_delete_eval_scope(pTHX)
 {
-    dVAR; dSP;
+    SV **newsp;
+    PMOP *newpm;
+    I32 gimme;
     register PERL_CONTEXT *cx;
-    const I32 gimme = GIMME_V;
+    I32 optype;
+       
+    POPBLOCK(cx,newpm);
+    POPEVAL(cx);
+    PL_curpm = newpm;
+    LEAVE;
+    PERL_UNUSED_VAR(newsp);
+    PERL_UNUSED_VAR(gimme);
+    PERL_UNUSED_VAR(optype);
+}
 
+/* Common-ish code salvaged from Perl_call_sv and pp_entertry, because it was
+   also needed by Perl_fold_constants.  */
+PERL_CONTEXT *
+Perl_create_eval_scope(pTHX_ U32 flags)
+{
+    PERL_CONTEXT *cx;
+    const I32 gimme = GIMME_V;
+       
     ENTER;
     SAVETMPS;
 
-    PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), SP);
+    PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
     PUSHEVAL(cx, 0, 0);
-    cx->blk_eval.retop = cLOGOP->op_other->op_next;
+    PL_eval_root = PL_op;      /* Only needed so that goto works right. */
 
     PL_in_eval = EVAL_INEVAL;
-    sv_setpvn(ERRSV,"",0);
-    PUTBACK;
+    if (flags & G_KEEPERR)
+       PL_in_eval |= EVAL_KEEPERR;
+    else
+       sv_setpvn(ERRSV,"",0);
+    if (flags & G_FAKINGEVAL) {
+       PL_eval_root = PL_op; /* Only needed so that goto works right. */
+    }
+    return cx;
+}
+    
+PP(pp_entertry)
+{
+    dVAR;
+    PERL_CONTEXT *cx = create_eval_scope(0);
+    cx->blk_eval.retop = cLOGOP->op_other->op_next;
     return DOCATCH(PL_op->op_next);
 }
 
@@ -4035,7 +4074,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other)
                PUSHs(other);
                PUSHs(*svp);
                PUTBACK;
-               if ((PL_curcop->op_private & HINT_INTEGER) == HINT_INTEGER)
+               if (CopHINTS_get(PL_curcop) & HINT_INTEGER)
                    (void) pp_i_eq();
                else
                    (void) pp_eq();
@@ -4129,7 +4168,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other)
        /* Otherwise, numeric comparison */
        PUSHs(d); PUSHs(e);
        PUTBACK;
-       if ((PL_curcop->op_private & HINT_INTEGER) == HINT_INTEGER)
+       if (CopHINTS_get(PL_curcop) & HINT_INTEGER)
            (void) pp_i_eq();
        else
            (void) pp_eq();
@@ -4499,14 +4538,23 @@ S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
     SV * const filter_state = (SV *)IoTOP_GV(datasv);
     SV * const filter_sub = (SV *)IoBOTTOM_GV(datasv);
     int len = 0;
-
+    /* Filter API says that the filter appends to the contents of the buffer.
+       Usually the buffer is "", so the details don't matter. But if it's not,
+       then clearly what it contains is already filtered by this filter, so we
+       don't want to pass it in a second time.
+       I'm going to use a mortal in case the upstream filter croaks.  */
+    SV *const upstream
+       = ((SvOK(buf_sv) && sv_len(buf_sv)) || SvGMAGICAL(buf_sv))
+       ? sv_newmortal() : buf_sv;
+
+    SvUPGRADE(upstream, SVt_PV);
     /* I was having segfault trouble under Linux 2.2.5 after a
        parse error occured.  (Had to hack around it with a test
        for PL_error_count == 0.)  Solaris doesn't segfault --
        not sure where the trouble is yet.  XXX */
 
     if (filter_has_file) {
-       len = FILTER_READ(idx+1, buf_sv, maxlen);
+       len = FILTER_READ(idx+1, upstream, maxlen);
     }
 
     if (filter_sub && len >= 0) {
@@ -4518,7 +4566,7 @@ S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
        SAVETMPS;
        EXTEND(SP, 2);
 
-       DEFSV = buf_sv;
+       DEFSV = upstream;
        PUSHMARK(SP);
        PUSHs(sv_2mortal(newSViv(maxlen)));
        if (filter_state) {
@@ -4557,6 +4605,9 @@ S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
        filter_del(S_run_user_filter);
     }
 
+    if (upstream != buf_sv) {
+       sv_catsv(buf_sv, upstream);
+    }
     return len;
 }