/* cop.h
*
- * Copyright (c) 1991-2001, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
+ * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE,
+ * and OP_SETSTATE that (loosely speaking) are separate statements.
+ * They hold information important for lexical state and error reporting.
+ * At run time, PL_curcop is set to point to the most recently executed cop,
+ * and thus can be used to determine our current state.
*/
+/* A jmpenv packages the state required to perform a proper non-local jump.
+ * Note that there is a start_env initialized when perl starts, and top_env
+ * points to this initially, so top_env should always be non-null.
+ *
+ * Existence of a non-null top_env->je_prev implies it is valid to call
+ * longjmp() at that runlevel (we make sure start_env.je_prev is always
+ * null to ensure this).
+ *
+ * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
+ * establish a local jmpenv to handle exception traps. Care must be taken
+ * to restore the previous value of je_mustcatch before exiting the
+ * stack frame iff JMPENV_PUSH was not called in that stack frame.
+ * GSAR 97-03-27
+ */
+
+struct jmpenv {
+ struct jmpenv * je_prev;
+ Sigjmp_buf je_buf; /* only for use if !je_throw */
+ int je_ret; /* last exception thrown */
+ bool je_mustcatch; /* need to call longjmp()? */
+};
+
+typedef struct jmpenv JMPENV;
+
+#ifdef OP_IN_REGISTER
+#define OP_REG_TO_MEM PL_opsave = op
+#define OP_MEM_TO_REG op = PL_opsave
+#else
+#define OP_REG_TO_MEM NOOP
+#define OP_MEM_TO_REG NOOP
+#endif
+
+/*
+ * How to build the first jmpenv.
+ *
+ * top_env needs to be non-zero. It points to an area
+ * in which longjmp() stuff is stored, as C callstack
+ * info there at least is thread specific this has to
+ * be per-thread. Otherwise a 'die' in a thread gives
+ * that thread the C stack of last thread to do an eval {}!
+ */
+
+#define JMPENV_BOOTSTRAP \
+ STMT_START { \
+ Zero(&PL_start_env, 1, JMPENV); \
+ PL_start_env.je_ret = -1; \
+ PL_start_env.je_mustcatch = TRUE; \
+ PL_top_env = &PL_start_env; \
+ } STMT_END
+
+/*
+ * PERL_FLEXIBLE_EXCEPTIONS
+ *
+ * All the flexible exceptions code has been removed.
+ * See the following threads for details:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
+ *
+ * Joshua's original patches (which weren't applied) and discussion:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
+ *
+ * Chip's reworked patch and discussion:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
+ *
+ * The flaw in these patches (which went unnoticed at the time) was
+ * that they moved some code that could potentially die() out of the
+ * region protected by the setjmp()s. This caused exceptions within
+ * END blocks and such to not be handled by the correct setjmp().
+ *
+ * The original patches that introduces flexible exceptions were:
+ *
+ * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386
+ * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162
+ */
+
+#define dJMPENV JMPENV cur_env
+
+#define JMPENV_PUSH(v) \
+ STMT_START { \
+ DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
+ (void*)&cur_env, (void*)PL_top_env)); \
+ cur_env.je_prev = PL_top_env; \
+ OP_REG_TO_MEM; \
+ cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
+ OP_MEM_TO_REG; \
+ PL_top_env = &cur_env; \
+ cur_env.je_mustcatch = FALSE; \
+ (v) = cur_env.je_ret; \
+ } STMT_END
+
+#define JMPENV_POP \
+ STMT_START { \
+ DEBUG_l(Perl_deb(aTHX_ "popping jumplevel was %p, now %p\n", \
+ (void*)PL_top_env, (void*)cur_env.je_prev)); \
+ PL_top_env = cur_env.je_prev; \
+ } STMT_END
+
+#define JMPENV_JUMP(v) \
+ STMT_START { \
+ OP_REG_TO_MEM; \
+ if (PL_top_env->je_prev) \
+ PerlProc_longjmp(PL_top_env->je_buf, (v)); \
+ if ((v) == 2) \
+ PerlProc_exit(STATUS_EXIT); \
+ PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
+ PerlProc_exit(1); \
+ } STMT_END
+
+#define CATCH_GET (PL_top_env->je_mustcatch)
+#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))
+
+
+
struct cop {
BASEOP
char * cop_label; /* label for this construct */
HV * cop_stash; /* package line was compiled in */
GV * cop_filegv; /* file the following line # is from */
#endif
+ U32 cop_hints; /* hints bits from pragmata */
U32 cop_seq; /* parse sequence number */
- I32 cop_arybase; /* array base this line was compiled with */
line_t cop_line; /* line # of this command */
- SV * cop_warnings; /* lexical warnings bitmask */
- SV * cop_io; /* lexical IO defaults */
+ /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
+ STRLEN * cop_warnings; /* lexical warnings bitmask */
+ /* compile time state of %^H. See the comment in op.c for how this is
+ used to recreate a hash to return from caller. */
+ struct refcounted_he * cop_hints_hash;
};
-#define Nullcop Null(COP*)
-
#ifdef USE_ITHREADS
# define CopFILE(c) ((c)->cop_file)
# define CopFILEGV(c) (CopFILE(c) \
- ? gv_fetchfile(CopFILE(c)) : Nullgv)
-# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
+ ? gv_fetchfile(CopFILE(c)) : NULL)
+
+# ifdef NETWARE
+# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
+# else
+# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
+# endif
+
# define CopFILESV(c) (CopFILE(c) \
- ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv)
+ ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
# define CopFILEAV(c) (CopFILE(c) \
- ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav)
+ ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
+# ifdef DEBUGGING
+# define CopFILEAVx(c) (assert(CopFILE(c)), \
+ GvAV(gv_fetchfile(CopFILE(c))))
+# else
+# define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c))))
+# endif
# define CopSTASHPV(c) ((c)->cop_stashpv)
-# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch))
+
+# ifdef NETWARE
+# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL))
+# else
+# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv))
+# endif
+
# define CopSTASH(c) (CopSTASHPV(c) \
- ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv)
-# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch)
-# define CopSTASH_eq(c,hv) ((hv) \
- && (CopSTASHPV(c) == HvNAME(hv) \
- || (CopSTASHPV(c) && HvNAME(hv) \
- && strEQ(CopSTASHPV(c), HvNAME(hv)))))
+ ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL)
+# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL)
+# define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv))
+# ifdef NETWARE
+# define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
+# define CopFILE_free(c) SAVECOPFILE_FREE(c)
+# else
+# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c))
+# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
+# endif
#else
# define CopFILEGV(c) ((c)->cop_filegv)
# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
-# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv)
-# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav)
-# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch)
+# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
+# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
+# ifdef DEBUGGING
+# define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
+# else
+# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
+# endif
+# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : NULL)
# define CopSTASH(c) ((c)->cop_stash)
# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
-# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch)
+# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
/* cop_stash is not refcounted */
# define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
# define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
+# define CopSTASH_free(c)
+# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
+
#endif /* USE_ITHREADS */
#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
#define CopLINE_dec(c) (--CopLINE(c))
#define CopLINE_set(c,l) (CopLINE(c) = (l))
+/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
+#ifdef MACOS_TRADITIONAL
+# define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c))
+#else
+# define OutCopFILE(c) CopFILE(c)
+#endif
+
+/* If $[ is non-zero, it's stored in cop_hints under the key "$[", and
+ HINT_ARYBASE is set to indicate this.
+ Setting it is ineficient due to the need to create 2 mortal SVs, but as
+ using $[ is highly discouraged, no sane Perl code will be using it. */
+#define CopARYBASE_get(c) \
+ ((CopHINTS_get(c) & HINT_ARYBASE) \
+ ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \
+ "$[", 2, 0, 0)) \
+ : 0)
+#define CopARYBASE_set(c, b) STMT_START { \
+ if (b || ((c)->cop_hints & HINT_ARYBASE)) { \
+ (c)->cop_hints |= HINT_ARYBASE; \
+ if ((c) == &PL_compiling) \
+ PL_hints |= HINT_LOCALIZE_HH | HINT_ARYBASE; \
+ (c)->cop_hints_hash \
+ = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \
+ sv_2mortal(newSVpvs("$[")), \
+ sv_2mortal(newSViv(b))); \
+ } \
+ } STMT_END
+
+/* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */
+#define CopHINTS_get(c) ((c)->cop_hints + 0)
+#define CopHINTS_set(c, h) STMT_START { \
+ (c)->cop_hints = (h); \
+ } STMT_END
+
/*
* Here we have some enormously heavy (or at least ponderous) wizardry.
*/
CV * cv;
GV * gv;
GV * dfoutgv;
-#ifndef USE_5005THREADS
AV * savearray;
-#endif /* USE_5005THREADS */
AV * argarray;
- U16 olddepth;
+ I32 olddepth;
U8 hasargs;
U8 lval; /* XXX merge lval and hasargs? */
- SV ** oldcurpad;
+ PAD *oldcomppad;
+ OP * retop; /* op to execute on exit from sub */
};
-#define PUSHSUB(cx) \
+/* base for the next two macros. Don't use directly.
+ * Note that the refcnt of the cv is incremented twice; The CX one is
+ * decremented by LEAVESUB, the other by LEAVE. */
+
+#define PUSHSUB_BASE(cx) \
cx->blk_sub.cv = cv; \
cx->blk_sub.olddepth = CvDEPTH(cv); \
cx->blk_sub.hasargs = hasargs; \
+ cx->blk_sub.retop = NULL; \
+ if (!CvDEPTH(cv)) { \
+ SvREFCNT_inc_simple_void_NN(cv); \
+ SvREFCNT_inc_simple_void_NN(cv); \
+ SAVEFREESV(cv); \
+ }
+
+
+#define PUSHSUB(cx) \
+ PUSHSUB_BASE(cx) \
cx->blk_sub.lval = PL_op->op_private & \
(OPpLVAL_INTRO|OPpENTERSUB_INARGS);
+/* variant for use by OP_DBSTATE, where op_private holds hint bits */
+#define PUSHSUB_DB(cx) \
+ PUSHSUB_BASE(cx) \
+ cx->blk_sub.lval = 0;
+
+
#define PUSHFORMAT(cx) \
cx->blk_sub.cv = cv; \
cx->blk_sub.gv = gv; \
+ cx->blk_sub.retop = NULL; \
cx->blk_sub.hasargs = 0; \
cx->blk_sub.dfoutgv = PL_defoutgv; \
- (void)SvREFCNT_inc(cx->blk_sub.dfoutgv)
+ SvREFCNT_inc_void(cx->blk_sub.dfoutgv)
-#ifdef USE_5005THREADS
-# define POP_SAVEARRAY() NOOP
-#else
-# define POP_SAVEARRAY() \
+#define POP_SAVEARRAY() \
STMT_START { \
SvREFCNT_dec(GvAV(PL_defgv)); \
GvAV(PL_defgv) = cx->blk_sub.savearray; \
} STMT_END
-#endif /* USE_5005THREADS */
/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
* leave any (a fast av_clear(ary), basically) */
#define CLEAR_ARGARRAY(ary) \
STMT_START { \
AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
- SvPVX(ary) = (char*)AvALLOC(ary); \
+ SvPV_set(ary, (char*)AvALLOC(ary)); \
AvFILLp(ary) = -1; \
} STMT_END
POP_SAVEARRAY(); \
/* abandon @_ if it got reified */ \
if (AvREAL(cx->blk_sub.argarray)) { \
- SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
+ const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
SvREFCNT_dec(cx->blk_sub.argarray); \
cx->blk_sub.argarray = newAV(); \
av_extend(cx->blk_sub.argarray, fill); \
- AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \
- cx->blk_sub.oldcurpad[0] = (SV*)cx->blk_sub.argarray; \
+ AvREIFY_only(cx->blk_sub.argarray); \
+ CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \
} \
else { \
CLEAR_ARGARRAY(cx->blk_sub.argarray); \
} \
sv = (SV*)cx->blk_sub.cv; \
if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \
- sv = Nullsv; \
+ sv = NULL; \
} STMT_END
#define LEAVESUB(sv) \
/* eval context */
struct block_eval {
- I32 old_in_eval;
- I32 old_op_type;
+ U8 old_in_eval;
+ U16 old_op_type;
SV * old_namesv;
OP * old_eval_root;
SV * cur_text;
CV * cv;
+ OP * retop; /* op to execute on exit from eval */
+ JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
};
#define PUSHEVAL(cx,n,fgv) \
STMT_START { \
cx->blk_eval.old_in_eval = PL_in_eval; \
cx->blk_eval.old_op_type = PL_op->op_type; \
- cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \
+ cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
cx->blk_eval.old_eval_root = PL_eval_root; \
cx->blk_eval.cur_text = PL_linestr; \
- cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \
+ cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
+ cx->blk_eval.retop = NULL; \
+ cx->blk_eval.cur_top_env = PL_top_env; \
} STMT_END
#define POPEVAL(cx) \
struct block_loop {
char * label;
I32 resetsp;
- OP * redo_op;
- OP * next_op;
- OP * last_op;
+ LOOP * my_op; /* My op, that contains redo, next and last ops. */
+ /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence
+ why next_op is conditionally defined below.) */
#ifdef USE_ITHREADS
void * iterdata;
- SV ** oldcurpad;
+ PAD *oldcomppad;
#else
+ OP * next_op;
SV ** itervar;
#endif
SV * itersave;
+ /* (from inspection of source code) for a .. range of strings this is the
+ current string. */
SV * iterlval;
+ /* (from inspection of source code) for a foreach loop this is the array
+ being iterated over. For a .. range of numbers it's the current value.
+ A check is often made on the SvTYPE of iterary to determine whether
+ we are iterating over an array or a range. (numbers or strings) */
AV * iterary;
IV iterix;
+ /* (from inspection of source code) for a .. range of numbers this is the
+ maximum value. */
IV itermax;
};
+/* It might be possible to squeeze this structure further. As best I can tell
+ itermax and iterlval are never used at the same time, so it might be possible
+ to make them into a union. However, I'm not confident that there are enough
+ flag bits/NULLable pointers in this structure alone to encode which is
+ active. There is, however, U8 of space free in struct block, which could be
+ used. Right now it may not be worth squeezing this structure further, as it's
+ the largest part of struct block, and currently struct block is 64 bytes on
+ an ILP32 system, which will give good cache alignment.
+*/
#ifdef USE_ITHREADS
# define CxITERVAR(c) \
((c)->blk_loop.iterdata \
? (CxPADLOOP(cx) \
- ? &((c)->blk_loop.oldcurpad)[INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)] \
+ ? &CX_CURPAD_SV( (c)->blk_loop, \
+ INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \
: &GvSV((GV*)(c)->blk_loop.iterdata)) \
: (SV**)NULL)
# define CX_ITERDATA_SET(cx,idata) \
- cx->blk_loop.oldcurpad = PL_curpad; \
+ CX_CURPAD_SAVE(cx->blk_loop); \
if ((cx->blk_loop.iterdata = (idata))) \
- cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx));
+ cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
+ else \
+ cx->blk_loop.itersave = NULL;
#else
# define CxITERVAR(c) ((c)->blk_loop.itervar)
# define CX_ITERDATA_SET(cx,ivar) \
if ((cx->blk_loop.itervar = (SV**)(ivar))) \
- cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx));
+ cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
+ else \
+ cx->blk_loop.itersave = NULL;
+#endif
+
+#ifdef USE_ITHREADS
+# define PUSHLOOP_OP_NEXT /* No need to do anything. */
+# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0)
+#else
+# define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop
+# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0)
#endif
#define PUSHLOOP(cx, dat, s) \
cx->blk_loop.label = PL_curcop->cop_label; \
cx->blk_loop.resetsp = s - PL_stack_base; \
- cx->blk_loop.redo_op = cLOOP->op_redoop; \
- cx->blk_loop.next_op = cLOOP->op_nextop; \
- cx->blk_loop.last_op = cLOOP->op_lastop; \
- cx->blk_loop.iterlval = Nullsv; \
- cx->blk_loop.iterary = Nullav; \
+ cx->blk_loop.my_op = cLOOP; \
+ PUSHLOOP_OP_NEXT; \
+ cx->blk_loop.iterlval = NULL; \
+ cx->blk_loop.iterary = NULL; \
cx->blk_loop.iterix = -1; \
CX_ITERDATA_SET(cx,dat);
#define POPLOOP(cx) \
SvREFCNT_dec(cx->blk_loop.iterlval); \
if (CxITERVAR(cx)) { \
- SV **s_v_p = CxITERVAR(cx); \
- sv_2mortal(*s_v_p); \
- *s_v_p = cx->blk_loop.itersave; \
+ if (SvPADMY(cx->blk_loop.itersave)) { \
+ SV ** const s_v_p = CxITERVAR(cx); \
+ sv_2mortal(*s_v_p); \
+ *s_v_p = cx->blk_loop.itersave; \
+ } \
+ else { \
+ SvREFCNT_dec(cx->blk_loop.itersave); \
+ } \
} \
if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
SvREFCNT_dec(cx->blk_loop.iterary);
+/* given/when context */
+struct block_givwhen {
+ OP *leave_op;
+};
+
+#define PUSHGIVEN(cx) \
+ cx->blk_givwhen.leave_op = cLOGOP->op_other;
+
+#define PUSHWHEN PUSHGIVEN
+
/* context common to subroutines, evals and loops */
struct block {
+ U16 blku_type; /* what kind of context this is */
+ U8 blku_gimme; /* is this block running in list context? */
+ U8 blku_spare; /* Padding to match with struct subst */
I32 blku_oldsp; /* stack pointer to copy stuff down to */
COP * blku_oldcop; /* old curcop pointer */
- I32 blku_oldretsp; /* return stack index */
I32 blku_oldmarksp; /* mark stack index */
I32 blku_oldscopesp; /* scope stack index */
PMOP * blku_oldpm; /* values of pattern match vars */
- U8 blku_gimme; /* is this block running in list context? */
union {
struct block_sub blku_sub;
struct block_eval blku_eval;
struct block_loop blku_loop;
+ struct block_givwhen blku_givwhen;
} blk_u;
};
#define blk_oldsp cx_u.cx_blk.blku_oldsp
#define blk_oldcop cx_u.cx_blk.blku_oldcop
-#define blk_oldretsp cx_u.cx_blk.blku_oldretsp
#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
#define blk_oldpm cx_u.cx_blk.blku_oldpm
#define blk_sub cx_u.cx_blk.blk_u.blku_sub
#define blk_eval cx_u.cx_blk.blk_u.blku_eval
#define blk_loop cx_u.cx_blk.blk_u.blku_loop
+#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
/* Enter a block. */
#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
cx->blk_oldcop = PL_curcop, \
cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
cx->blk_oldscopesp = PL_scopestack_ix, \
- cx->blk_oldretsp = PL_retstack_ix, \
cx->blk_oldpm = PL_curpm, \
- cx->blk_gimme = gimme; \
+ cx->blk_gimme = (U8)gimme; \
DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \
(long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )
PL_curcop = cx->blk_oldcop, \
PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
PL_scopestack_ix = cx->blk_oldscopesp, \
- PL_retstack_ix = cx->blk_oldretsp, \
pm = cx->blk_oldpm, \
gimme = cx->blk_gimme; \
+ DEBUG_SCOPE("POPBLOCK"); \
DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \
(long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )
PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
PL_scopestack_ix = cx->blk_oldscopesp, \
- PL_retstack_ix = cx->blk_oldretsp, \
- PL_curpm = cx->blk_oldpm
+ PL_curpm = cx->blk_oldpm; \
+ DEBUG_SCOPE("TOPBLOCK");
/* substitution context */
struct subst {
+ U16 sbu_type; /* what kind of context this is */
+ U8 sbu_once; /* Actually both booleans, but U8 to matches */
+ U8 sbu_rxtainted; /* struct block */
I32 sbu_iters;
I32 sbu_maxiters;
I32 sbu_rflags;
I32 sbu_oldsave;
- bool sbu_once;
- bool sbu_rxtainted;
char * sbu_orig;
SV * sbu_dstr;
SV * sbu_targ;
cx->sb_s = s, \
cx->sb_m = m, \
cx->sb_strend = strend, \
- cx->sb_rxres = Null(void*), \
+ cx->sb_rxres = NULL, \
cx->sb_rx = rx, \
cx->cx_type = CXt_SUBST; \
- rxres_save(&cx->sb_rxres, rx)
+ rxres_save(&cx->sb_rxres, rx); \
+ (void)ReREFCNT_inc(rx)
#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
- rxres_free(&cx->sb_rxres)
+ rxres_free(&cx->sb_rxres); \
+ ReREFCNT_dec(cx->sb_rx)
struct context {
- U32 cx_type; /* what kind of context this is */
union {
struct block cx_blk;
struct subst cx_subst;
} cx_u;
};
+#define cx_type cx_u.cx_subst.sbu_type
#define CXTYPEMASK 0xff
#define CXt_NULL 0
#define CXt_SUBST 4
#define CXt_BLOCK 5
#define CXt_FORMAT 6
+#define CXt_GIVEN 7
+#define CXt_WHEN 8
+
+/* private flags for CXt_SUB and CXt_NULL */
+#define CXp_MULTICALL 0x00000400 /* part of a multicall (so don't
+ tear down context on exit). */
/* private flags for CXt_EVAL */
#define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */
#define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */
-#ifdef USE_ITHREADS
/* private flags for CXt_LOOP */
+#define CXp_FOREACH 0x00000200 /* a foreach loop */
+#define CXp_FOR_DEF 0x00000400 /* foreach using $_ */
+#ifdef USE_ITHREADS
# define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata
has pad offset; if not set,
iterdata holds GV* */
#endif
#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
+#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
+ == CXp_MULTICALL)
#define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \
== (CXt_EVAL|CXp_REAL))
#define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \
== (CXt_EVAL|CXp_TRYBLOCK))
+#define CxFOREACH(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH)) \
+ == (CXt_LOOP|CXp_FOREACH))
+#define CxFOREACHDEF(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))\
+ == (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))
#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
-/* "gimme" values */
+/*
+=head1 "Gimme" Values
+*/
/*
=for apidoc AmU||G_SCALAR
#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */
#define G_NODEBUG 32 /* Disable debugging at toplevel. */
#define G_METHOD 64 /* Calling method. */
+#define G_FAKINGEVAL 256 /* Faking en eval context for call_sv or
+ fold_constants. */
/* flag bits for PL_in_eval */
#define EVAL_NULL 0 /* not in an eval */
#define POPSTACK \
STMT_START { \
dSP; \
- PERL_SI *prev = PL_curstackinfo->si_prev; \
+ PERL_SI * const prev = PL_curstackinfo->si_prev; \
if (!prev) { \
PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
my_exit(1); \
POPSTACK; \
} \
} STMT_END
+
+#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
+#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
+
+/*
+=head1 Multicall Functions
+
+=for apidoc Ams||dMULTICALL
+Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||PUSH_MULTICALL
+Opening bracket for a lightweight callback.
+See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||MULTICALL
+Make a lightweight callback. See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||POP_MULTICALL
+Closing bracket for a lightweight callback.
+See L<perlcall/Lightweight Callbacks>.
+
+=cut
+*/
+
+#define dMULTICALL \
+ SV **newsp; /* set by POPBLOCK */ \
+ PERL_CONTEXT *cx; \
+ CV *multicall_cv; \
+ OP *multicall_cop; \
+ bool multicall_oldcatch; \
+ U8 hasargs = 0 /* used by PUSHSUB */
+
+#define PUSH_MULTICALL(the_cv) \
+ STMT_START { \
+ CV * const _nOnclAshIngNamE_ = the_cv; \
+ CV * const cv = _nOnclAshIngNamE_; \
+ AV * const padlist = CvPADLIST(cv); \
+ ENTER; \
+ multicall_oldcatch = CATCH_GET; \
+ SAVETMPS; SAVEVPTR(PL_op); \
+ CATCH_SET(TRUE); \
+ PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \
+ PUSHSUB(cx); \
+ if (++CvDEPTH(cv) >= 2) { \
+ PERL_STACK_OVERFLOW_CHECK(); \
+ Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
+ } \
+ SAVECOMPPAD(); \
+ PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
+ multicall_cv = cv; \
+ multicall_cop = CvSTART(cv); \
+ } STMT_END
+
+#define MULTICALL \
+ STMT_START { \
+ PL_op = multicall_cop; \
+ CALLRUNOPS(aTHX); \
+ } STMT_END
+
+#define POP_MULTICALL \
+ STMT_START { \
+ LEAVESUB(multicall_cv); \
+ CvDEPTH(multicall_cv)--; \
+ POPBLOCK(cx,PL_curpm); \
+ CATCH_SET(multicall_oldcatch); \
+ LEAVE; \
+ } STMT_END
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
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