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/* cop.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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()? */
#ifdef PERL_FLEXIBLE_EXCEPTIONS
void (*je_throw)(int v); /* last for bincompat */
bool je_noset; /* no need for setjmp() */
#endif
};
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
#ifdef PERL_FLEXIBLE_EXCEPTIONS
/*
* These exception-handling macros are split up to
* ease integration with C++ exceptions.
*
* To use C++ try+catch to catch Perl exceptions, an extension author
* needs to first write an extern "C" function to throw an appropriate
* exception object; typically it will be or contain an integer,
* because Perl's internals use integers to track exception types:
* extern "C" { static void thrower(int i) { throw i; } }
*
* Then (as shown below) the author needs to use, not the simple
* JMPENV_PUSH, but several of its constitutent macros, to arrange for
* the Perl internals to call thrower() rather than longjmp() to
* report exceptions:
*
* dJMPENV;
* JMPENV_PUSH_INIT(thrower);
* try {
* ... stuff that may throw exceptions ...
* }
* catch (int why) { // or whatever matches thrower()
* JMPENV_POST_CATCH;
* EXCEPT_SET(why);
* switch (why) {
* ... // handle various Perl exception codes
* }
* }
* JMPENV_POP; // don't forget this!
*/
/*
* Function that catches/throws, and its callback for the
* body of protected processing.
*/
typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list);
typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env,
int *, protect_body_t, ...);
#define dJMPENV JMPENV cur_env; \
volatile JMPENV *pcur_env = ((cur_env.je_noset = 0),&cur_env)
#define JMPENV_PUSH_INIT_ENV(ce,THROWFUNC) \
STMT_START { \
(ce).je_throw = (THROWFUNC); \
(ce).je_ret = -1; \
(ce).je_mustcatch = FALSE; \
(ce).je_prev = PL_top_env; \
PL_top_env = &(ce); \
OP_REG_TO_MEM; \
} STMT_END
#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC)
#define JMPENV_POST_CATCH_ENV(ce) \
STMT_START { \
OP_MEM_TO_REG; \
PL_top_env = &(ce); \
} STMT_END
#define JMPENV_POST_CATCH JMPENV_POST_CATCH_ENV(*(JMPENV*)pcur_env)
#define JMPENV_PUSH_ENV(ce,v) \
STMT_START { \
if (!(ce).je_noset) { \
DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
(void*)ce, (void*)PL_top_env)); \
JMPENV_PUSH_INIT_ENV(ce,NULL); \
EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, SCOPE_SAVES_SIGNAL_MASK));\
(ce).je_noset = 1; \
} \
else \
EXCEPT_SET_ENV(ce,0); \
JMPENV_POST_CATCH_ENV(ce); \
(v) = EXCEPT_GET_ENV(ce); \
} STMT_END
#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v)
#define JMPENV_POP_ENV(ce) \
STMT_START { \
if (PL_top_env == &(ce)) \
PL_top_env = (ce).je_prev; \
} STMT_END
#define JMPENV_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env)
#define JMPENV_JUMP(v) \
STMT_START { \
OP_REG_TO_MEM; \
if (PL_top_env->je_prev) { \
if (PL_top_env->je_throw) \
PL_top_env->je_throw(v); \
else \
PerlProc_longjmp(PL_top_env->je_buf, (v)); \
} \
if ((v) == 2) \
PerlProc_exit(STATUS_EXIT); \
PerlIO_printf(Perl_error_log, "panic: top_env\n"); \
PerlProc_exit(1); \
} STMT_END
#define EXCEPT_GET_ENV(ce) ((ce).je_ret)
#define EXCEPT_GET EXCEPT_GET_ENV(*(JMPENV*)pcur_env)
#define EXCEPT_SET_ENV(ce,v) ((ce).je_ret = (v))
#define EXCEPT_SET(v) EXCEPT_SET_ENV(*(JMPENV*)pcur_env,v)
#else /* !PERL_FLEXIBLE_EXCEPTIONS */
#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 { 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
#endif /* PERL_FLEXIBLE_EXCEPTIONS */
#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 */
#ifdef USE_ITHREADS
char * cop_stashpv; /* package line was compiled in */
char * cop_file; /* file name the following line # is from */
#else
HV * cop_stash; /* package line was compiled in */
GV * cop_filegv; /* file the following line # is from */
#endif
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 */
};
#ifdef USE_ITHREADS
# define CopFILE(c) ((c)->cop_file)
# define CopFILEGV(c) (CopFILE(c) \
? gv_fetchfile(CopFILE(c)) : NULL)
# ifdef NETWARE
# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
# define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l)))
# else
# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
# define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
# endif
# define CopFILESV(c) (CopFILE(c) \
? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
# define CopFILEAV(c) (CopFILE(c) \
? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
# define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c))))
# define CopSTASHPV(c) ((c)->cop_stashpv)
# 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) : 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 CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
# define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \
? SvPVX(GvSV(CopFILEGV(c))) : NULL)
# define CopSTASH(c) ((c)->cop_stash)
# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
# 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(c) ((c)->cop_line)
#define CopLINE_inc(c) (++CopLINE(c))
#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
/* CopARYBASE is likely to be removed soon. */
#define CopARYBASE(c) ((c)->cop_arybase)
#define CopARYBASE_get(c) ((c)->cop_arybase + 0)
#define CopARYBASE_set(c, b) STMT_START { (c)->cop_arybase = (b); } STMT_END
/* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */
#define CopHINTS_get(c) ((U32)(c)->op_private + 0)
#define CopHINTS_set(c, h) STMT_START { \
(c)->op_private \
= (U8)((h) & HINT_PRIVATE_MASK); \
} STMT_END
/*
* Here we have some enormously heavy (or at least ponderous) wizardry.
*/
/* subroutine context */
struct block_sub {
CV * cv;
GV * gv;
GV * dfoutgv;
#ifndef USE_5005THREADS
AV * savearray;
#endif /* USE_5005THREADS */
AV * argarray;
long olddepth;
U8 hasargs;
U8 lval; /* XXX merge lval and hasargs? */
PAD *oldcomppad;
};
/* 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; \
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.hasargs = 0; \
cx->blk_sub.dfoutgv = PL_defoutgv; \
SvREFCNT_inc_void(cx->blk_sub.dfoutgv)
#ifdef USE_5005THREADS
# define POP_SAVEARRAY() NOOP
#else
# 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); \
SvPV_set(ary, (char*)AvALLOC(ary)); \
AvFILLp(ary) = -1; \
} STMT_END
#define POPSUB(cx,sv) \
STMT_START { \
if (CxHASARGS(cx)) { \
POP_SAVEARRAY(); \
/* abandon @_ if it got reified */ \
if (AvREAL(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_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 = NULL; \
} STMT_END
#define LEAVESUB(sv) \
STMT_START { \
if (sv) \
SvREFCNT_dec(sv); \
} STMT_END
#define POPFORMAT(cx) \
setdefout(cx->blk_sub.dfoutgv); \
SvREFCNT_dec(cx->blk_sub.dfoutgv);
/* eval context */
struct block_eval {
I32 old_in_eval;
I32 old_op_type;
SV * old_namesv;
OP * old_eval_root;
SV * cur_text;
CV * cv;
JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
};
#define CxOLD_IN_EVAL(cx) (0 + (cx)->blk_eval.old_in_eval)
#define CxOLD_OP_TYPE(cx) (0 + (cx)->blk_eval.old_op_type)
#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) : NULL); \
cx->blk_eval.old_eval_root = PL_eval_root; \
cx->blk_eval.cur_text = PL_linestr; \
cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
cx->blk_eval.cur_top_env = PL_top_env; \
} STMT_END
#define POPEVAL(cx) \
STMT_START { \
PL_in_eval = CxOLD_IN_EVAL(cx); \
optype = CxOLD_OP_TYPE(cx); \
PL_eval_root = cx->blk_eval.old_eval_root; \
if (cx->blk_eval.old_namesv) \
sv_2mortal(cx->blk_eval.old_namesv); \
} STMT_END
/* loop context */
struct block_loop {
char * label;
I32 resetsp;
OP * redo_op;
OP * next_op;
OP * last_op;
#ifdef USE_ITHREADS
void * iterdata;
PAD *oldcomppad;
#else
SV ** itervar;
#endif
/* Eliminated in blead by change 33080, but for binary compatibility
reasons we can't remove it from the middle of a struct in a maintenance
release, so it gets to stay, and be set to NULL. */
SV * itersave;
SV * iterlval;
AV * iterary;
IV iterix;
IV itermax;
};
#ifdef USE_ITHREADS
# define CxITERVAR(c) \
((c)->blk_loop.iterdata \
? (CxPADLOOP(cx) \
? &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_CURPAD_SAVE(cx->blk_loop); \
cx->blk_loop.itersave = NULL; \
cx->blk_loop.iterdata = (idata);
#else
# define CxITERVAR(c) ((c)->blk_loop.itervar)
# define CX_ITERDATA_SET(cx,ivar) \
cx->blk_loop.itersave = NULL; \
cx->blk_loop.itervar = (SV**)(ivar);
#endif
#define CxLABEL(c) (0 + (c)->blk_loop.label)
#define CxHASARGS(c) (0 + (c)->blk_sub.hasargs)
#define CxLVAL(c) (0 + (c)->blk_sub.lval)
#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 = 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 (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
SvREFCNT_dec(cx->blk_loop.iterary);
/* context common to subroutines, evals and loops */
struct block {
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;
} 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_gimme cx_u.cx_blk.blku_gimme
#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
/* Enter a block. */
#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
cx->cx_type = t, \
cx->blk_oldsp = sp - PL_stack_base, \
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 = (U8)gimme; \
DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \
(long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )
/* Exit a block (RETURN and LAST). */
#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
newsp = PL_stack_base + cx->blk_oldsp, \
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)]); )
/* Continue a block elsewhere (NEXT and REDO). */
#define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
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; \
DEBUG_SCOPE("TOPBLOCK");
/* substitution context */
struct subst {
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;
char * sbu_s;
char * sbu_m;
char * sbu_strend;
void * sbu_rxres;
REGEXP * sbu_rx;
};
#define sb_iters cx_u.cx_subst.sbu_iters
#define sb_maxiters cx_u.cx_subst.sbu_maxiters
#define sb_rflags cx_u.cx_subst.sbu_rflags
#define sb_oldsave cx_u.cx_subst.sbu_oldsave
#define sb_once cx_u.cx_subst.sbu_once
#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
#define sb_orig cx_u.cx_subst.sbu_orig
#define sb_dstr cx_u.cx_subst.sbu_dstr
#define sb_targ cx_u.cx_subst.sbu_targ
#define sb_s cx_u.cx_subst.sbu_s
#define sb_m cx_u.cx_subst.sbu_m
#define sb_strend cx_u.cx_subst.sbu_strend
#define sb_rxres cx_u.cx_subst.sbu_rxres
#define sb_rx cx_u.cx_subst.sbu_rx
#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
cx->sb_iters = iters, \
cx->sb_maxiters = maxiters, \
cx->sb_rflags = r_flags, \
cx->sb_oldsave = oldsave, \
cx->sb_once = once, \
cx->sb_rxtainted = rxtainted, \
cx->sb_orig = orig, \
cx->sb_dstr = dstr, \
cx->sb_targ = targ, \
cx->sb_s = s, \
cx->sb_m = m, \
cx->sb_strend = strend, \
cx->sb_rxres = NULL, \
cx->sb_rx = rx, \
cx->cx_type = CXt_SUBST; \
rxres_save(&cx->sb_rxres, rx); \
(void)ReREFCNT_inc(rx)
#define CxONCE(cx) (0 + cx->sb_once)
#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
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 CXTYPEMASK 0xff
#define CXt_NULL 0
#define CXt_SUB 1
#define CXt_EVAL 2
#define CXt_LOOP 3
#define CXt_SUBST 4
#define CXt_BLOCK 5
#define CXt_FORMAT 6
/* 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 */
/* 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* */
# define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \
== (CXt_LOOP|CXp_PADVAR))
#endif
#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
== CXp_MULTICALL)
#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
== (CXt_EVAL|CXp_REAL))
#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
== (CXt_EVAL|CXp_TRYBLOCK))
#define CxFOREACH(c) (((c)->cx_type & (CXTYPEMASK|CXp_FOREACH)) \
== (CXt_LOOP|CXp_FOREACH))
#define CxFOREACHDEF(c) (((c)->cx_type & (CXTYPEMASK|CXp_FOREACH|CXp_FOR_DEF))\
== (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))
#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
/*
=head1 "Gimme" Values
*/
/*
=for apidoc AmU||G_SCALAR
Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and
L<perlcall>.
=for apidoc AmU||G_ARRAY
Used to indicate list context. See C<GIMME_V>, C<GIMME> and
L<perlcall>.
=for apidoc AmU||G_VOID
Used to indicate void context. See C<GIMME_V> and L<perlcall>.
=for apidoc AmU||G_DISCARD
Indicates that arguments returned from a callback should be discarded. See
L<perlcall>.
=for apidoc AmU||G_EVAL
Used to force a Perl C<eval> wrapper around a callback. See
L<perlcall>.
=for apidoc AmU||G_NOARGS
Indicates that no arguments are being sent to a callback. See
L<perlcall>.
=cut
*/
#define G_SCALAR 0
#define G_ARRAY 1
#define G_VOID 128 /* skip this bit when adding flags below */
/* extra flags for Perl_call_* routines */
#define G_DISCARD 2 /* Call FREETMPS.
Don't change this without consulting the
hash actions codes defined in hv.h */
#define G_EVAL 4 /* Assume eval {} around subroutine call. */
#define G_NOARGS 8 /* Don't construct a @_ array. */
#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 an eval context for call_sv or
fold_constants. */
/* flag bits for PL_in_eval */
#define EVAL_NULL 0 /* not in an eval */
#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
#define EVAL_INREQUIRE 8 /* The code is being required. */
/* Support for switching (stack and block) contexts.
* This ensures magic doesn't invalidate local stack and cx pointers.
*/
#define PERLSI_UNKNOWN -1
#define PERLSI_UNDEF 0
#define PERLSI_MAIN 1
#define PERLSI_MAGIC 2
#define PERLSI_SORT 3
#define PERLSI_SIGNAL 4
#define PERLSI_OVERLOAD 5
#define PERLSI_DESTROY 6
#define PERLSI_WARNHOOK 7
#define PERLSI_DIEHOOK 8
#define PERLSI_REQUIRE 9
struct stackinfo {
AV * si_stack; /* stack for current runlevel */
PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
I32 si_cxix; /* current context index */
I32 si_cxmax; /* maximum allocated index */
I32 si_type; /* type of runlevel */
struct stackinfo * si_prev;
struct stackinfo * si_next;
I32 si_markoff; /* offset where markstack begins for us.
* currently used only with DEBUGGING,
* but not #ifdef-ed for bincompat */
};
typedef struct stackinfo PERL_SI;
#define cxstack (PL_curstackinfo->si_cxstack)
#define cxstack_ix (PL_curstackinfo->si_cxix)
#define cxstack_max (PL_curstackinfo->si_cxmax)
#ifdef DEBUGGING
# define SET_MARK_OFFSET \
PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
#else
# define SET_MARK_OFFSET NOOP
#endif
#define PUSHSTACKi(type) \
STMT_START { \
PERL_SI *next = PL_curstackinfo->si_next; \
if (!next) { \
next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
next->si_prev = PL_curstackinfo; \
PL_curstackinfo->si_next = next; \
} \
next->si_type = type; \
next->si_cxix = -1; \
AvFILLp(next->si_stack) = 0; \
SWITCHSTACK(PL_curstack,next->si_stack); \
PL_curstackinfo = next; \
SET_MARK_OFFSET; \
} STMT_END
#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
* PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
#define POPSTACK \
STMT_START { \
dSP; \
PERL_SI * const prev = PL_curstackinfo->si_prev; \
if (!prev) { \
PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
my_exit(1); \
} \
SWITCHSTACK(PL_curstack,prev->si_stack); \
/* don't free prev here, free them all at the END{} */ \
PL_curstackinfo = prev; \
} STMT_END
#define POPSTACK_TO(s) \
STMT_START { \
while (PL_curstack != s) { \
dounwind(-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), 1); \
} \
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
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