Opening bracket for arguments on a callback. See C<L</PUTBACK>> and
L<perlcall>.
-=for apidoc Ams||dSP
+=for apidoc Amns||dSP
Declares a local copy of perl's stack pointer for the XSUB, available via
the C<SP> macro. See C<L</SP>>.
See C<L<perlapi/SP>>. (Available for backward source code compatibility with
the old (Perl 5.005) thread model.)
-=for apidoc Ams||dMARK
+=for apidoc Amns||dMARK
Declare a stack marker variable, C<mark>, for the XSUB. See C<L</MARK>> and
C<L</dORIGMARK>>.
-=for apidoc Ams||dORIGMARK
+=for apidoc Amns||dORIGMARK
Saves the original stack mark for the XSUB. See C<L</ORIGMARK>>.
=for apidoc AmU||ORIGMARK
The original stack mark for the XSUB. See C<L</dORIGMARK>>.
-=for apidoc Ams||SPAGAIN
+=for apidoc Amns||SPAGAIN
Refetch the stack pointer. Used after a callback. See L<perlcall>.
=cut */
mark_stack_entry = markstack_grow(); \
*mark_stack_entry = (I32)((p) - PL_stack_base); \
DEBUG_s(DEBUG_v(PerlIO_printf(Perl_debug_log, \
- "MARK push %p %"IVdf"\n", \
+ "MARK push %p %" IVdf "\n", \
PL_markstack_ptr, (IV)*mark_stack_entry))); \
} STMT_END
#define INCMARK \
STMT_START { \
DEBUG_s(DEBUG_v(PerlIO_printf(Perl_debug_log, \
- "MARK inc %p %"IVdf"\n", \
+ "MARK inc %p %" IVdf "\n", \
(PL_markstack_ptr+1), (IV)*(PL_markstack_ptr+1)))); \
PL_markstack_ptr++; \
} STMT_END
#define DIE return Perl_die
/*
-=for apidoc Ams||PUTBACK
+=for apidoc Amns||PUTBACK
Closing bracket for XSUB arguments. This is usually handled by C<xsubpp>.
See C<L</PUSHMARK>> and L<perlcall> for other uses.
=cut
*/
+/* EXTEND_HWM_SET: note the high-water-mark to which the stack has been
+ * requested to be extended (which is likely to be less than PL_stack_max)
+ */
+#if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
+# define EXTEND_HWM_SET(p, n) \
+ STMT_START { \
+ SSize_t ix = (p) - PL_stack_base + (n); \
+ if (ix > PL_curstackinfo->si_stack_hwm) \
+ PL_curstackinfo->si_stack_hwm = ix; \
+ } STMT_END
+#else
+# define EXTEND_HWM_SET(p, n) NOOP
+#endif
+
/* _EXTEND_SAFE_N(n): private helper macro for EXTEND().
* Tests whether the value of n would be truncated when implicitly cast to
* SSize_t as an arg to stack_grow(). If so, sets it to -1 instead to
(sizeof(n) > sizeof(SSize_t) && ((SSize_t)(n) != (n)) ? -1 : (n))
#ifdef STRESS_REALLOC
+# define EXTEND_SKIP(p, n) EXTEND_HWM_SET(p, n)
+
# define EXTEND(p,n) STMT_START { \
sp = stack_grow(sp,p,_EXTEND_SAFE_N(n)); \
PERL_UNUSED_VAR(sp); \
* this just gives a safe false positive
*/
-# define _EXTEND_NEEDS_GROW(p,n) ( (n) < 0 || PL_stack_max - p < (n))
+# define _EXTEND_NEEDS_GROW(p,n) ((n) < 0 || PL_stack_max - (p) < (n))
+
+
+/* EXTEND_SKIP(): used for where you would normally call EXTEND(), but
+ * you know for sure that a previous op will have already extended the
+ * stack sufficiently. For example pp_enteriter ensures that that there
+ * is always at least 1 free slot, so pp_iter can return &PL_sv_yes/no
+ * without checking each time. Calling EXTEND_SKIP() defeats the HWM
+ * debugging mechanism which would otherwise whine
+ */
+
+# define EXTEND_SKIP(p, n) STMT_START { \
+ EXTEND_HWM_SET(p, n); \
+ assert(!_EXTEND_NEEDS_GROW(p,n)); \
+ } STMT_END
+
# define EXTEND(p,n) STMT_START { \
+ EXTEND_HWM_SET(p, n); \
if (UNLIKELY(_EXTEND_NEEDS_GROW(p,n))) { \
sp = stack_grow(sp,p,_EXTEND_SAFE_N(n)); \
PERL_UNUSED_VAR(sp); \
} } STMT_END
/* Same thing, but update mark register too. */
# define MEXTEND(p,n) STMT_START { \
+ EXTEND_HWM_SET(p, n); \
if (UNLIKELY(_EXTEND_NEEDS_GROW(p,n))) { \
const SSize_t markoff = mark - PL_stack_base;\
sp = stack_grow(sp,p,_EXTEND_SAFE_N(n)); \
} } STMT_END
#endif
+
/* set TARG to the IV value i. If do_taint is false,
* assume that PL_tainted can never be true */
#define TARGi(i, do_taint) \
#define mXPUSHs(s) XPUSHs(sv_2mortal(s))
#define XPUSHmortal XPUSHs(sv_newmortal())
#define mXPUSHp(p,l) STMT_START { EXTEND(sp,1); mPUSHp((p), (l)); } STMT_END
-#define mXPUSHn(n) STMT_START { EXTEND(sp,1); sv_setnv(PUSHmortal, (NV)(n)); } STMT_END
-#define mXPUSHi(i) STMT_START { EXTEND(sp,1); sv_setiv(PUSHmortal, (IV)(i)); } STMT_END
-#define mXPUSHu(u) STMT_START { EXTEND(sp,1); sv_setuv(PUSHmortal, (UV)(u)); } STMT_END
+#define mXPUSHn(n) STMT_START { EXTEND(sp,1); mPUSHn(n); } STMT_END
+#define mXPUSHi(i) STMT_START { EXTEND(sp,1); mPUSHi(i); } STMT_END
+#define mXPUSHu(u) STMT_START { EXTEND(sp,1); mPUSHu(u); } STMT_END
#define SETs(s) (*sp = s)
#define SETTARG STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END
#define AMGf_noright 1
#define AMGf_noleft 2
-#define AMGf_assign 4
+#define AMGf_assign 4 /* op supports mutator variant, e.g. $x += 1 */
#define AMGf_unary 8
#define AMGf_numeric 0x10 /* for Perl_try_amagic_bin */
-#define AMGf_set 0x20 /* for Perl_try_amagic_bin */
+
#define AMGf_want_list 0x40
#define AMGf_numarg 0x80
else { /* AMGf_want_scalar */ \
dATARGET; /* just use the arg's location */ \
sv_setsv(TARG, tmpsv); \
- if (opASSIGN) \
+ if (PL_op->op_flags & OPf_STACKED) \
sp--; \
SETTARG; \
} \
} STMT_END
+/* 2019: no longer used in core */
#define opASSIGN (PL_op->op_flags & OPf_STACKED)
/*
https://perl5.git.perl.org / perl5.git / blobdiff