/* --- Compatibility wrappers ---------------------------------------------- */
+#ifndef HvNAME_get
+# define HvNAME_get(H) HvNAME(H)
+#endif
+
+#ifndef HvNAMELEN_get
+# define HvNAMELEN_get(H) strlen(HvNAME_get(H))
+#endif
+
#define A_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
#ifndef A_WORKAROUND_REQUIRE_PROPAGATION
# define A_WORKAROUND_REQUIRE_PROPAGATION !A_HAS_PERL(5, 10, 1)
#endif
+#ifndef A_HAS_RPEEP
+# define A_HAS_RPEEP A_HAS_PERL(5, 13, 5)
+#endif
+
+#ifndef A_HAS_MULTIDEREF
+# define A_HAS_MULTIDEREF A_HAS_PERL(5, 21, 7)
+#endif
+
+#ifndef OpSIBLING
+# ifdef OP_SIBLING
+# define OpSIBLING(O) OP_SIBLING(O)
+# else
+# define OpSIBLING(O) ((O)->op_sibling)
+# endif
+#endif
+
+/* ... Thread safety and multiplicity ...................................... */
+
+/* Always safe when the workaround isn't needed */
+#if !A_WORKAROUND_REQUIRE_PROPAGATION
+# undef A_FORKSAFE
+# define A_FORKSAFE 1
+/* Otherwise, safe unless Makefile.PL says it's Win32 */
+#elif !defined(A_FORKSAFE)
+# define A_FORKSAFE 1
+#endif
+
+#ifndef A_MULTIPLICITY
+# if defined(MULTIPLICITY)
+# define A_MULTIPLICITY 1
+# else
+# define A_MULTIPLICITY 0
+# endif
+#endif
+#if A_MULTIPLICITY
+# ifndef PERL_IMPLICIT_CONTEXT
+# error MULTIPLICITY builds must set PERL_IMPLICIT_CONTEXT
+# endif
+#endif
+
+#ifndef tTHX
+# define tTHX PerlInterpreter*
+#endif
+
+#if A_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
+# define A_THREADSAFE 1
+# ifndef MY_CXT_CLONE
+# define MY_CXT_CLONE \
+ dMY_CXT_SV; \
+ my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
+ Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
+ sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
+# endif
+#else
+# define A_THREADSAFE 0
+# undef dMY_CXT
+# define dMY_CXT dNOOP
+# undef MY_CXT
+# define MY_CXT a_globaldata
+# undef START_MY_CXT
+# define START_MY_CXT static my_cxt_t MY_CXT;
+# undef MY_CXT_INIT
+# define MY_CXT_INIT NOOP
+# undef MY_CXT_CLONE
+# define MY_CXT_CLONE NOOP
+#endif
+
+#if A_THREADSAFE
+/* We must use preexistent global mutexes or we will never be able to destroy
+ * them. */
+# if A_HAS_PERL(5, 9, 3)
+# define A_LOADED_LOCK MUTEX_LOCK(&PL_my_ctx_mutex)
+# define A_LOADED_UNLOCK MUTEX_UNLOCK(&PL_my_ctx_mutex)
+# else
+# define A_LOADED_LOCK OP_REFCNT_LOCK
+# define A_LOADED_UNLOCK OP_REFCNT_UNLOCK
+# endif
+#else
+# define A_LOADED_LOCK NOOP
+# define A_LOADED_UNLOCK NOOP
+#endif
+
+#if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK)
+# define A_CHECK_LOCK OP_CHECK_MUTEX_LOCK
+# define A_CHECK_UNLOCK OP_CHECK_MUTEX_UNLOCK
+#elif A_HAS_PERL(5, 9, 3)
+# define A_CHECK_LOCK OP_REFCNT_LOCK
+# define A_CHECK_UNLOCK OP_REFCNT_UNLOCK
+#else
+/* Before perl 5.9.3, indirect_ck_*() calls are already protected by the
+ * A_LOADED mutex, which falls back to the OP_REFCNT mutex. Make sure we don't
+ * lock it twice. */
+# define A_CHECK_LOCK NOOP
+# define A_CHECK_UNLOCK NOOP
+#endif
+
+typedef OP *(*a_ck_t)(pTHX_ OP *);
+
+#ifdef wrap_op_checker
+
+# define a_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP))
+
+#else
+
+static void a_ck_replace(pTHX_ OPCODE type, a_ck_t new_ck, a_ck_t *old_ck_p) {
+#define a_ck_replace(T, NC, OCP) a_ck_replace(aTHX_ (T), (NC), (OCP))
+ A_CHECK_LOCK;
+ if (!*old_ck_p) {
+ *old_ck_p = PL_check[type];
+ PL_check[type] = new_ck;
+ }
+ A_CHECK_UNLOCK;
+}
+
+#endif
+
+static void a_ck_restore(pTHX_ OPCODE type, a_ck_t *old_ck_p) {
+#define a_ck_restore(T, OCP) a_ck_restore(aTHX_ (T), (OCP))
+ A_CHECK_LOCK;
+ if (*old_ck_p) {
+ PL_check[type] = *old_ck_p;
+ *old_ck_p = 0;
+ }
+ A_CHECK_UNLOCK;
+}
+
/* --- Helpers ------------------------------------------------------------- */
-#if A_WORKAROUND_REQUIRE_PROPAGATION
+/* ... Check if the module is loaded ....................................... */
+
+static I32 a_loaded = 0;
+
+#if A_THREADSAFE
+
+#define PTABLE_NAME ptable_loaded
+#define PTABLE_NEED_DELETE 1
+#define PTABLE_NEED_WALK 0
+
+#include "ptable.h"
+
+#define ptable_loaded_store(T, K, V) ptable_loaded_store(aPTBLMS_ (T), (K), (V))
+#define ptable_loaded_delete(T, K) ptable_loaded_delete(aPTBLMS_ (T), (K))
+#define ptable_loaded_free(T) ptable_loaded_free(aPTBLMS_ (T))
+
+static ptable *a_loaded_cxts = NULL;
+
+static int a_is_loaded(pTHX_ void *cxt) {
+#define a_is_loaded(C) a_is_loaded(aTHX_ (C))
+ int res = 0;
-#define A_ENCODE_UV(B, U) \
- len = 0; \
- while (len < sizeof(UV)) { \
- (B)[len++] = (U) & 0xFF; \
- (U) >>= 8; \
+ A_LOADED_LOCK;
+ if (a_loaded_cxts && ptable_fetch(a_loaded_cxts, cxt))
+ res = 1;
+ A_LOADED_UNLOCK;
+
+ return res;
+}
+
+static int a_set_loaded_locked(pTHX_ void *cxt) {
+#define a_set_loaded_locked(C) a_set_loaded_locked(aTHX_ (C))
+ int global_setup = 0;
+
+ if (a_loaded <= 0) {
+ assert(a_loaded == 0);
+ assert(!a_loaded_cxts);
+ a_loaded_cxts = ptable_new();
+ global_setup = 1;
}
+ ++a_loaded;
+ assert(a_loaded_cxts);
+ ptable_loaded_store(a_loaded_cxts, cxt, cxt);
+
+ return global_setup;
+}
+
+static int a_clear_loaded_locked(pTHX_ void *cxt) {
+#define a_clear_loaded_locked(C) a_clear_loaded_locked(aTHX_ (C))
+ int global_teardown = 0;
+
+ if (a_loaded > 1) {
+ assert(a_loaded_cxts);
+ ptable_loaded_delete(a_loaded_cxts, cxt);
+ --a_loaded;
+ } else if (a_loaded_cxts) {
+ assert(a_loaded == 1);
+ ptable_loaded_free(a_loaded_cxts);
+ a_loaded_cxts = NULL;
+ a_loaded = 0;
+ global_teardown = 1;
+ }
+
+ return global_teardown;
+}
+
+#else
+
+#define a_is_loaded(C) (a_loaded > 0)
+#define a_set_loaded_locked(C) ((a_loaded++ <= 0) ? 1 : 0)
+#define a_clear_loaded_locked(C) ((--a_loaded <= 0) ? 1 : 0)
+
+#endif
-#define A_DECODE_UV(U, B) \
- len = sizeof(UV); \
- while (len > 0) \
- (U) = ((U) << 8) | (B)[--len];
+/* ... Thread-safe hints ................................................... */
#if A_WORKAROUND_REQUIRE_PROPAGATION
-STATIC UV a_require_tag(pTHX) {
-#define a_require_tag() a_require_tag(aTHX)
- const PERL_SI *si;
- for (si = PL_curstackinfo; si; si = si->si_prev) {
- I32 cxix;
+typedef struct {
+ U32 bits;
+ IV require_tag;
+} a_hint_t;
+
+#define A_HINT_FREE(H) PerlMemShared_free(H)
+
+#if A_THREADSAFE
+
+#define PTABLE_NAME ptable_hints
+#define PTABLE_VAL_FREE(V) A_HINT_FREE(V)
+#define PTABLE_NEED_DELETE 0
+#define PTABLE_NEED_WALK 1
+
+#define pPTBL pTHX
+#define pPTBL_ pTHX_
+#define aPTBL aTHX
+#define aPTBL_ aTHX_
+
+#include "ptable.h"
+
+#define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
+#define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
+
+#endif /* A_THREADSAFE */
+
+#endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
+
+#define PTABLE_NAME ptable_seen
+#define PTABLE_NEED_DELETE 0
+#define PTABLE_NEED_WALK 0
- for (cxix = si->si_cxix; cxix >= 0; --cxix) {
- const PERL_CONTEXT *cx = si->si_cxstack + cxix;
+#include "ptable.h"
+
+/* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
+#define ptable_seen_store(T, K, V) ptable_seen_store(aPTBLMS_ (T), (K), (V))
+#define ptable_seen_clear(T) ptable_seen_clear(aPTBLMS_ (T))
+#define ptable_seen_free(T) ptable_seen_free(aPTBLMS_ (T))
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+typedef struct {
+ peep_t old_peep; /* This is actually the rpeep past 5.13.5 */
+ ptable *seen; /* It really is a ptable_seen */
+#if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
+ ptable *tbl; /* It really is a ptable_hints */
+ tTHX owner;
+#endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
+} my_cxt_t;
+
+START_MY_CXT
+
+#if A_WORKAROUND_REQUIRE_PROPAGATION
+
+#if A_THREADSAFE
+
+typedef struct {
+ ptable *tbl;
+#if A_HAS_PERL(5, 13, 2)
+ CLONE_PARAMS *params;
+#else
+ CLONE_PARAMS params;
+#endif
+} a_ptable_clone_ud;
+
+#if A_HAS_PERL(5, 13, 2)
+# define a_ptable_clone_ud_init(U, T, O) \
+ (U).tbl = (T); \
+ (U).params = Perl_clone_params_new((O), aTHX)
+# define a_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
+# define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
+#else
+# define a_ptable_clone_ud_init(U, T, O) \
+ (U).tbl = (T); \
+ (U).params.stashes = newAV(); \
+ (U).params.flags = 0; \
+ (U).params.proto_perl = (O)
+# define a_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
+# define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
+#endif
+
+static void a_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
+ a_ptable_clone_ud *ud = ud_;
+ a_hint_t *h1 = ent->val;
+ a_hint_t *h2;
+
+ h2 = PerlMemShared_malloc(sizeof *h2);
+ h2->bits = h1->bits;
+ h2->require_tag = PTR2IV(a_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
+
+ ptable_hints_store(ud->tbl, ent->key, h2);
+}
- if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
- return PTR2UV(cx);
+#endif /* A_THREADSAFE */
+
+static IV a_require_tag(pTHX) {
+#define a_require_tag() a_require_tag(aTHX)
+ const CV *cv, *outside;
+
+ cv = PL_compcv;
+
+ if (!cv) {
+ /* If for some reason the pragma is operational at run-time, try to discover
+ * the current cv in use. */
+ const PERL_SI *si;
+
+ for (si = PL_curstackinfo; si; si = si->si_prev) {
+ I32 cxix;
+
+ for (cxix = si->si_cxix; cxix >= 0; --cxix) {
+ const PERL_CONTEXT *cx = si->si_cxstack + cxix;
+
+ switch (CxTYPE(cx)) {
+ case CXt_SUB:
+ case CXt_FORMAT:
+ /* The propagation workaround is only needed up to 5.10.0 and at that
+ * time format and sub contexts were still identical. And even later the
+ * cv members offsets should have been kept the same. */
+ cv = cx->blk_sub.cv;
+ goto get_enclosing_cv;
+ case CXt_EVAL:
+ cv = cx->blk_eval.cv;
+ goto get_enclosing_cv;
+ default:
+ break;
+ }
+ }
}
+
+ cv = PL_main_cv;
}
- return PTR2UV(NULL);
+get_enclosing_cv:
+ for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
+ cv = outside;
+
+ return PTR2IV(cv);
}
-#endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
-STATIC SV *a_tag(pTHX_ UV bits) {
+static SV *a_tag(pTHX_ UV bits) {
#define a_tag(B) a_tag(aTHX_ (B))
- SV *hint;
- const PERL_SI *si;
- UV cxreq;
- unsigned char buf[sizeof(UV) * 2];
- STRLEN len;
-
- cxreq = a_require_tag();
- A_ENCODE_UV(buf, cxreq);
- A_ENCODE_UV(buf + sizeof(UV), bits);
- hint = newSVpvn(buf, sizeof buf);
- SvREADONLY_on(hint);
-
- return hint;
+ a_hint_t *h;
+#if A_THREADSAFE
+ dMY_CXT;
+
+ if (!MY_CXT.tbl)
+ return newSViv(0);
+#endif /* A_THREADSAFE */
+
+ h = PerlMemShared_malloc(sizeof *h);
+ h->bits = bits;
+ h->require_tag = a_require_tag();
+
+#if A_THREADSAFE
+ /* We only need for the key to be an unique tag for looking up the value later
+ * Allocated memory provides convenient unique identifiers, so that's why we
+ * use the hint as the key itself. */
+ ptable_hints_store(MY_CXT.tbl, h, h);
+#endif /* A_THREADSAFE */
+
+ return newSViv(PTR2IV(h));
}
-STATIC UV a_detag(pTHX_ const SV *hint) {
+static UV a_detag(pTHX_ const SV *hint) {
#define a_detag(H) a_detag(aTHX_ (H))
- const PERL_SI *si;
- UV cxreq = 0, bits = 0;
- unsigned char *buf;
- STRLEN len;
+ a_hint_t *h;
+#if A_THREADSAFE
+ dMY_CXT;
- if (!(hint && SvOK(hint)))
+ if (!MY_CXT.tbl)
return 0;
+#endif /* A_THREADSAFE */
- buf = SvPVX(hint);
-
- A_DECODE_UV(cxreq, buf);
- if (a_require_tag() != cxreq)
+ if (!(hint && SvIOK(hint)))
return 0;
- A_DECODE_UV(bits, buf + sizeof(UV));
+ h = INT2PTR(a_hint_t *, SvIVX(hint));
+#if A_THREADSAFE
+ h = ptable_fetch(MY_CXT.tbl, h);
+#endif /* A_THREADSAFE */
- return bits;
+ if (a_require_tag() != h->require_tag)
+ return 0;
+
+ return h->bits;
}
#else /* A_WORKAROUND_REQUIRE_PROPAGATION */
#define a_tag(B) newSVuv(B)
-#define a_detag(H) (((H) && SvOK(H)) ? SvUVX(H) : 0)
+/* PVs fetched from the hints chain have their SvLEN set to zero, so get the UV
+ * from a copy. */
+#define a_detag(H) \
+ ((H) \
+ ? (SvIOK(H) \
+ ? SvUVX(H) \
+ : (SvPOK(H) \
+ ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \
+ : 0 \
+ ) \
+ ) \
+ : 0)
#endif /* !A_WORKAROUND_REQUIRE_PROPAGATION */
#define A_HINT_ROOT 64
#define A_HINT_DEREF 128
-STATIC U32 a_hash = 0;
+static VOL U32 a_hash = 0;
-STATIC UV a_hint(pTHX) {
+static UV a_hint(pTHX) {
#define a_hint() a_hint(aTHX)
SV *hint;
-#if A_HAS_PERL(5, 9, 5)
+#ifdef cop_hints_fetch_pvn
+ hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, a_hash, 0);
+#elif A_HAS_PERL(5, 9, 5)
hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
NULL,
__PACKAGE__, __PACKAGE_LEN__,
0,
a_hash);
#else
- SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, a_hash);
+ SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
if (!val)
return 0;
hint = *val;
/* ... op => info map ...................................................... */
typedef struct {
- OP *(*old_pp)(pTHX);
- UV flags;
- void *next;
+ OP *(*old_pp)(pTHX);
+ void *next;
+ UV flags;
} a_op_info;
#define PTABLE_NAME ptable_map
#define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
+#define PTABLE_NEED_DELETE 1
+#define PTABLE_NEED_WALK 0
#include "ptable.h"
/* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
#define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
+#define ptable_map_delete(T, K) ptable_map_delete(aPTBLMS_ (T), (K))
+#define ptable_map_free(T) ptable_map_free(aPTBLMS_ (T))
-STATIC ptable *a_op_map = NULL;
+static ptable *a_op_map = NULL;
#ifdef USE_ITHREADS
-STATIC perl_mutex a_op_map_mutex;
-#endif
-STATIC const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
+#define dA_MAP_THX a_op_info a_op_map_tmp_oi
+
+static perl_mutex a_op_map_mutex;
+
+#define A_LOCK(M) MUTEX_LOCK(M)
+#define A_UNLOCK(M) MUTEX_UNLOCK(M)
+
+static const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
const a_op_info *val;
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
val = ptable_fetch(a_op_map, o);
if (val) {
val = oi;
}
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
return val;
}
-STATIC const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
+#define a_map_fetch(O) a_map_fetch((O), &a_op_map_tmp_oi)
+
+#else /* USE_ITHREADS */
+
+#define dA_MAP_THX dNOOP
+
+#define A_LOCK(M) NOOP
+#define A_UNLOCK(M) NOOP
+
+#define a_map_fetch(O) ptable_fetch(a_op_map, (O))
+
+#endif /* !USE_ITHREADS */
+
+static const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
#define a_map_store_locked(O, PP, N, F) a_map_store_locked(aPTBLMS_ (O), (PP), (N), (F))
a_op_info *oi;
return oi;
}
-STATIC void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
+static void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
#define a_map_store(O, PP, N, F) a_map_store(aPTBLMS_ (O), (PP), (N), (F))
-
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
a_map_store_locked(o, old_pp, next, flags);
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
}
-STATIC void a_map_delete(pTHX_ const OP *o) {
+static void a_map_delete(pTHX_ const OP *o) {
#define a_map_delete(O) a_map_delete(aTHX_ (O))
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
- ptable_map_store(a_op_map, o, NULL);
+ ptable_map_delete(a_op_map, o);
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
}
-STATIC const OP *a_map_descend(const OP *o) {
+static const OP *a_map_descend(const OP *o) {
switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
case OA_BASEOP:
case OA_UNOP:
return NULL;
}
-STATIC void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
+static void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
#define a_map_store_root(R, PP, F) a_map_store_root(aPTBLMS_ (R), (PP), (F))
const a_op_info *roi;
a_op_info *oi;
const OP *o = root;
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
roi = a_map_store_locked(o, old_pp, (OP *) root, flags | A_HINT_ROOT);
}
}
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
return;
}
-STATIC void a_map_update_flags_topdown(const OP *root, UV flags) {
+static void a_map_update_flags_topdown(const OP *root, UV flags) {
a_op_info *oi;
const OP *o = root;
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
flags &= ~A_HINT_ROOT;
o = a_map_descend(o);
} while (o);
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
return;
}
#define a_map_cancel(R) a_map_update_flags_topdown((R), 0)
-STATIC void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
+static void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
a_op_info *oi;
-#ifdef USE_ITHREADS
- MUTEX_LOCK(&a_op_map_mutex);
-#endif
+ A_LOCK(&a_op_map_mutex);
flags &= ~A_HINT_ROOT;
rflags |= A_HINT_ROOT;
}
oi->flags = rflags;
-#ifdef USE_ITHREADS
- MUTEX_UNLOCK(&a_op_map_mutex);
-#endif
+ A_UNLOCK(&a_op_map_mutex);
return;
}
/* ... Decide whether this expression should be autovivified or not ........ */
-STATIC UV a_map_resolve(const OP *o, a_op_info *oi) {
+static UV a_map_resolve(const OP *o, const a_op_info *oi) {
UV flags = 0, rflags;
const OP *root;
- a_op_info *roi = oi;
+ const a_op_info *roi = oi;
while (!(roi->flags & A_HINT_ROOT))
roi = roi->next;
return oi->flags & A_HINT_ROOT ? 0 : flags;
}
-/* ... Lightweight pp_defined() ............................................ */
-
-STATIC bool a_defined(pTHX_ SV *sv) {
-#define a_defined(S) a_defined(aTHX_ (S))
- bool defined = FALSE;
+/* ... Inspired from pp_defined() .......................................... */
+static int a_undef(pTHX_ SV *sv) {
+#define a_undef(S) a_undef(aTHX_ (S))
switch (SvTYPE(sv)) {
+ case SVt_NULL:
+ return 1;
case SVt_PVAV:
if (AvMAX(sv) >= 0 || SvGMAGICAL(sv)
|| (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
- defined = TRUE;
+ return 0;
break;
case SVt_PVHV:
if (HvARRAY(sv) || SvGMAGICAL(sv)
|| (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
- defined = TRUE;
+ return 0;
break;
default:
- defined = SvOK(sv);
+ SvGETMAGIC(sv);
+ if (SvOK(sv))
+ return 0;
}
- return defined;
+ return 1;
}
/* --- PP functions -------------------------------------------------------- */
/* ... pp_rv2av ............................................................ */
-STATIC OP *a_pp_rv2av(pTHX) {
- a_op_info oi;
- UV flags;
+static OP *a_pp_rv2av(pTHX) {
+ dA_MAP_THX;
+ const a_op_info *oi;
dSP;
- a_map_fetch(PL_op, &oi);
- flags = oi.flags;
+ oi = a_map_fetch(PL_op);
- if (flags & A_HINT_DEREF) {
- if (!SvOK(TOPs)) {
+ if (oi->flags & A_HINT_DEREF) {
+ if (a_undef(TOPs)) {
/* We always need to push an empty array to fool the pp_aelem() that comes
* later. */
SV *av;
- POPs;
+ (void) POPs;
av = sv_2mortal((SV *) newAV());
PUSHs(av);
RETURN;
}
- } else {
- PL_op->op_ppaddr = oi.old_pp;
}
- return CALL_FPTR(oi.old_pp)(aTHX);
+ return oi->old_pp(aTHX);
}
/* ... pp_rv2hv ............................................................ */
-STATIC OP *a_pp_rv2hv_simple(pTHX) {
- a_op_info oi;
- UV flags;
+static OP *a_pp_rv2hv_simple(pTHX) {
+ dA_MAP_THX;
+ const a_op_info *oi;
dSP;
- a_map_fetch(PL_op, &oi);
- flags = oi.flags;
+ oi = a_map_fetch(PL_op);
- if (flags & A_HINT_DEREF) {
- if (!SvOK(TOPs))
+ if (oi->flags & A_HINT_DEREF) {
+ if (a_undef(TOPs))
RETURN;
- } else {
- PL_op->op_ppaddr = oi.old_pp;
}
- return CALL_FPTR(oi.old_pp)(aTHX);
+ return oi->old_pp(aTHX);
}
-STATIC OP *a_pp_rv2hv(pTHX) {
- a_op_info oi;
- UV flags;
+static OP *a_pp_rv2hv(pTHX) {
+ dA_MAP_THX;
+ const a_op_info *oi;
dSP;
- a_map_fetch(PL_op, &oi);
- flags = oi.flags;
+ oi = a_map_fetch(PL_op);
- if (flags & A_HINT_DEREF) {
- if (!SvOK(TOPs)) {
+ if (oi->flags & A_HINT_DEREF) {
+ if (a_undef(TOPs)) {
SV *hv;
- POPs;
+ (void) POPs;
hv = sv_2mortal((SV *) newHV());
PUSHs(hv);
RETURN;
}
- } else {
- PL_op->op_ppaddr = oi.old_pp;
}
- return CALL_FPTR(oi.old_pp)(aTHX);
+ return oi->old_pp(aTHX);
}
/* ... pp_deref (aelem,helem,rv2sv,padsv) .................................. */
-STATIC OP *a_pp_deref(pTHX) {
- a_op_info oi;
+static void a_cannot_vivify(pTHX_ UV flags) {
+#define a_cannot_vivify(F) a_cannot_vivify(aTHX_ (F))
+ if (flags & A_HINT_STRICT)
+ croak("Reference vivification forbidden");
+ else if (flags & A_HINT_WARN)
+ warn("Reference was vivified");
+ else /* A_HINT_STORE */
+ croak("Can't vivify reference");
+}
+
+static OP *a_pp_deref(pTHX) {
+ dA_MAP_THX;
+ const a_op_info *oi;
UV flags;
dSP;
- a_map_fetch(PL_op, &oi);
- flags = oi.flags;
+ oi = a_map_fetch(PL_op);
+ flags = oi->flags;
if (flags & A_HINT_DEREF) {
OP *o;
- U8 old_private;
-deref:
- old_private = PL_op->op_private;
- PL_op->op_private = ((old_private & ~OPpDEREF) | OPpLVAL_DEFER);
- o = CALL_FPTR(oi.old_pp)(aTHX);
- PL_op->op_private = old_private;
+ o = oi->old_pp(aTHX);
if (flags & (A_HINT_NOTIFY|A_HINT_STORE)) {
SPAGAIN;
- if (!SvOK(TOPs)) {
- if (flags & A_HINT_STRICT)
- croak("Reference vivification forbidden");
- else if (flags & A_HINT_WARN)
- warn("Reference was vivified");
- else /* A_HINT_STORE */
- croak("Can't vivify reference");
- }
+ if (a_undef(TOPs))
+ a_cannot_vivify(flags);
}
return o;
- } else if ((flags & ~A_HINT_ROOT)
- && (PL_op->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
- /* Decide if the expression must autovivify or not.
- * This branch should be called only once by expression. */
- flags = a_map_resolve(PL_op, &oi);
-
- /* We need the updated flags value in the deref branch. */
- if (flags & A_HINT_DEREF)
- goto deref;
}
- /* This op doesn't need to skip autovivification, so restore the original
- * state. */
- PL_op->op_ppaddr = oi.old_pp;
-
- return CALL_FPTR(oi.old_pp)(aTHX);
+ return oi->old_pp(aTHX);
}
/* ... pp_root (exists,delete,keys,values) ................................. */
-STATIC OP *a_pp_root_unop(pTHX) {
- a_op_info oi;
+static OP *a_pp_root_unop(pTHX) {
dSP;
- if (!a_defined(TOPs)) {
- POPs;
+ if (a_undef(TOPs)) {
+ (void) POPs;
/* Can only be reached by keys or values */
if (GIMME_V == G_SCALAR) {
dTARGET;
RETURN;
}
- a_map_fetch(PL_op, &oi);
-
- return CALL_FPTR(oi.old_pp)(aTHX);
+ {
+ dA_MAP_THX;
+ const a_op_info *oi = a_map_fetch(PL_op);
+ return oi->old_pp(aTHX);
+ }
}
-STATIC OP *a_pp_root_binop(pTHX) {
- a_op_info oi;
+static OP *a_pp_root_binop(pTHX) {
dSP;
- if (!a_defined(TOPm1s)) {
- POPs;
- POPs;
+ if (a_undef(TOPm1s)) {
+ (void) POPs;
+ (void) POPs;
if (PL_op->op_type == OP_EXISTS)
RETPUSHNO;
else
RETPUSHUNDEF;
}
- a_map_fetch(PL_op, &oi);
-
- return CALL_FPTR(oi.old_pp)(aTHX);
+ {
+ dA_MAP_THX;
+ const a_op_info *oi = a_map_fetch(PL_op);
+ return oi->old_pp(aTHX);
+ }
}
-/* --- Check functions ----------------------------------------------------- */
+#if A_HAS_MULTIDEREF
-STATIC void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
-#define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
- a_op_info oi;
+/* ... pp_multideref ....................................................... */
- if (o->op_type == type && o->op_ppaddr != new_pp
- && cUNOPo->op_first->op_type != OP_GV
- && a_map_fetch(o, &oi)) {
- a_map_store(o, o->op_ppaddr, oi.next, oi.flags);
- o->op_ppaddr = new_pp;
+/* This pp replacement is actually only called for topmost exists/delete ops,
+ * because we hijack the [ah]elem check functions and this disables the
+ * optimization for lvalue and rvalue dereferencing. In particular, the
+ * OPf_MOD branches should never be covered. In the future, the multideref
+ * optimization might also be disabled for custom exists/delete check functions,
+ * which will make this section unnecessary. However, the code tries to be as
+ * general as possible in case I think of a way to reenable the multideref
+ * optimization even when this module is in use. */
+
+static UV a_do_multideref(const OP *o, UV flags) {
+ UV isexdel, other_flags;
+
+ assert(o->op_type == OP_MULTIDEREF);
+
+ other_flags = flags & ~A_HINT_DO;
+
+ isexdel = o->op_private & (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE);
+ if (isexdel) {
+ if (isexdel & OPpMULTIDEREF_EXISTS) {
+ flags &= A_HINT_EXISTS;
+ } else {
+ flags &= A_HINT_DELETE;
+ }
+ } else {
+ if (o->op_flags & OPf_MOD) {
+ flags &= A_HINT_STORE;
+ } else {
+ flags &= A_HINT_FETCH;
+ }
}
- return;
+ return flags ? (flags | other_flags) : 0;
}
-/* ... ck_pad{any,sv} ...................................................... */
+static SV *a_do_fake_pp(pTHX_ OP *op) {
+#define a_do_fake_pp(O) a_do_fake_pp(aTHX_ (O))
+ {
+ OP *o = PL_op;
+ ENTER;
+ SAVEOP();
+ PL_op = op;
+ PL_op->op_ppaddr(aTHX);
+ PL_op = o;
+ LEAVE;
+ }
-/* Sadly, the PADSV OPs we are interested in don't trigger the padsv check
- * function, but are instead manually mutated from a PADANY. This is why we set
- * PL_ppaddr[OP_PADSV] in the padany check function so that PADSV OPs will have
- * their op_ppaddr set to our pp_padsv. PL_ppaddr[OP_PADSV] is then reset at the
- * beginning of every ck_pad{any,sv}. Some unwanted OPs can still call our
- * pp_padsv, but much less than if we would have set PL_ppaddr[OP_PADSV]
- * globally. */
+ {
+ SV *ret;
+ dSP;
+ ret = POPs;
+ PUTBACK;
+ return ret;
+ }
+}
-STATIC OP *(*a_pp_padsv_saved)(pTHX) = 0;
+static void a_do_fake_pp_unop_init(pTHX_ UNOP *unop, U32 type, U32 flags) {
+#define a_do_fake_pp_unop_init(O, T, F) a_do_fake_pp_unop_init(aTHX_ (O), (T), (F))
+ unop->op_type = type;
+ unop->op_flags = OPf_WANT_SCALAR | (~OPf_WANT & flags);
+ unop->op_private = 0;
+ unop->op_first = NULL;
+ unop->op_ppaddr = PL_ppaddr[type];
+}
+
+static SV *a_do_fake_pp_unop_arg1(pTHX_ U32 type, U32 flags, SV *arg) {
+#define a_do_fake_pp_unop_arg1(T, F, A) a_do_fake_pp_unop_arg1(aTHX_ (T), (F), (A))
+ UNOP unop;
+ dSP;
-STATIC void a_pp_padsv_save(void) {
- if (a_pp_padsv_saved)
- return;
+ a_do_fake_pp_unop_init(&unop, type, flags);
- a_pp_padsv_saved = PL_ppaddr[OP_PADSV];
- PL_ppaddr[OP_PADSV] = a_pp_deref;
+ EXTEND(SP, 1);
+ PUSHs(arg);
+ PUTBACK;
+
+ return a_do_fake_pp((OP *) &unop);
}
-STATIC void a_pp_padsv_restore(OP *o) {
- if (!a_pp_padsv_saved)
- return;
+static SV *a_do_fake_pp_unop_arg2(pTHX_ U32 type, U32 flags, SV *arg1, SV *arg2) {
+#define a_do_fake_pp_unop_arg2(T, F, A1, A2) a_do_fake_pp_unop_arg2(aTHX_ (T), (F), (A1), (A2))
+ UNOP unop;
+ dSP;
+
+ a_do_fake_pp_unop_init(&unop, type, flags);
- if (o->op_ppaddr == a_pp_deref)
- o->op_ppaddr = a_pp_padsv_saved;
+ EXTEND(SP, 2);
+ PUSHs(arg1);
+ PUSHs(arg2);
+ PUTBACK;
- PL_ppaddr[OP_PADSV] = a_pp_padsv_saved;
- a_pp_padsv_saved = 0;
+ return a_do_fake_pp((OP *) &unop);
}
-STATIC OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
+#define a_do_pp_rv2av(R) a_do_fake_pp_unop_arg1(OP_RV2AV, OPf_REF, (R))
+#define a_do_pp_afetch(A, I) a_do_fake_pp_unop_arg2(OP_AELEM, 0, (A), (I))
+#define a_do_pp_afetch_lv(A, I) a_do_fake_pp_unop_arg2(OP_AELEM, OPf_MOD, (A), (I))
+#define a_do_pp_aexists(A, I) a_do_fake_pp_unop_arg2(OP_EXISTS, OPf_SPECIAL, (A), (I))
+#define a_do_pp_adelete(A, I) a_do_fake_pp_unop_arg2(OP_DELETE, OPf_SPECIAL, (A), (I))
+
+#define a_do_pp_rv2hv(R) a_do_fake_pp_unop_arg1(OP_RV2HV, OPf_REF, (R))
+#define a_do_pp_hfetch(H, K) a_do_fake_pp_unop_arg2(OP_HELEM, 0, (H), (K))
+#define a_do_pp_hfetch_lv(H, K) a_do_fake_pp_unop_arg2(OP_HELEM, OPf_MOD, (H), (K))
+#define a_do_pp_hexists(H, K) a_do_fake_pp_unop_arg2(OP_EXISTS, 0, (H), (K))
+#define a_do_pp_hdelete(H, K) a_do_fake_pp_unop_arg2(OP_DELETE, 0, (H), (K))
+
+static OP *a_pp_multideref(pTHX) {
+ UNOP_AUX_item *items;
+ UV actions;
+ UV flags = 0;
+ SV *sv = NULL;
+ dSP;
-STATIC OP *a_ck_padany(pTHX_ OP *o) {
- UV hint;
+ {
+ dA_MAP_THX;
+ const a_op_info *oi = a_map_fetch(PL_op);
+ assert(oi);
+ flags = a_do_multideref(PL_op, oi->flags);
+ if (!flags)
+ return oi->old_pp(aTHX);
+ }
- a_pp_padsv_restore(o);
+ items = cUNOP_AUXx(PL_op)->op_aux;
+ actions = items->uv;
+
+ PL_multideref_pc = items;
+
+ while (1) {
+ switch (actions & MDEREF_ACTION_MASK) {
+ case MDEREF_reload:
+ actions = (++items)->uv;
+ continue;
+ case MDEREF_AV_padav_aelem: /* $lex[...] */
+ sv = PAD_SVl((++items)->pad_offset);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_AV_aelem;
+ case MDEREF_AV_gvav_aelem: /* $pkg[...] */
+ sv = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(sv));
+ sv = (SV *) GvAVn((GV *) sv);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_AV_aelem;
+ case MDEREF_AV_pop_rv2av_aelem: /* expr->[...] */
+ sv = POPs;
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_AV_rv2av_aelem;
+ case MDEREF_AV_gvsv_vivify_rv2av_aelem: /* $pkg->[...] */
+ sv = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(sv));
+ sv = GvSVn((GV *) sv);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_AV_vivify_rv2av_aelem;
+ case MDEREF_AV_padsv_vivify_rv2av_aelem: /* $lex->[...] */
+ sv = PAD_SVl((++items)->pad_offset);
+ /* FALLTHROUGH */
+ case MDEREF_AV_vivify_rv2av_aelem: /* vivify, ->[...] */
+ if (a_undef(sv))
+ goto ret_undef;
+do_AV_vivify_rv2av_aelem:
+ sv = Perl_vivify_ref(aTHX_ sv, OPpDEREF_AV);
+do_AV_rv2av_aelem:
+ sv = a_do_pp_rv2av(sv);
+do_AV_aelem:
+ {
+ SV *esv;
+ assert(SvTYPE(sv) == SVt_PVAV);
+ switch (actions & MDEREF_INDEX_MASK) {
+ case MDEREF_INDEX_none:
+ goto finish;
+ case MDEREF_INDEX_const:
+ esv = sv_2mortal(newSViv((++items)->iv));
+ break;
+ case MDEREF_INDEX_padsv:
+ esv = PAD_SVl((++items)->pad_offset);
+ goto check_elem;
+ case MDEREF_INDEX_gvsv:
+ esv = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(esv));
+ esv = GvSVn((GV *) esv);
+check_elem:
+ if (UNLIKELY(SvROK(esv) && !SvGAMAGIC(esv) && ckWARN(WARN_MISC)))
+ Perl_warner(aTHX_ packWARN(WARN_MISC),
+ "Use of reference \"%"SVf"\" as array index",
+ SVfARG(esv));
+ break;
+ }
+ PL_multideref_pc = items;
+ if (actions & MDEREF_FLAG_last) {
+ switch (flags & A_HINT_DO) {
+ case A_HINT_FETCH:
+ sv = a_do_pp_afetch(sv, esv);
+ break;
+ case A_HINT_STORE:
+ sv = a_do_pp_afetch_lv(sv, esv);
+ break;
+ case A_HINT_EXISTS:
+ sv = a_do_pp_aexists(sv, esv);
+ break;
+ case A_HINT_DELETE:
+ sv = a_do_pp_adelete(sv, esv);
+ break;
+ }
+ goto finish;
+ }
+ sv = a_do_pp_afetch(sv, esv);
+ break;
+ }
+ case MDEREF_HV_padhv_helem: /* $lex{...} */
+ sv = PAD_SVl((++items)->pad_offset);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_HV_helem;
+ case MDEREF_HV_gvhv_helem: /* $pkg{...} */
+ sv = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(sv));
+ sv = (SV *) GvHVn((GV *) sv);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_HV_helem;
+ case MDEREF_HV_pop_rv2hv_helem: /* expr->{...} */
+ sv = POPs;
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_HV_rv2hv_helem;
+ case MDEREF_HV_gvsv_vivify_rv2hv_helem: /* $pkg->{...} */
+ sv = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(sv));
+ sv = GvSVn((GV *) sv);
+ if (a_undef(sv))
+ goto ret_undef;
+ goto do_HV_vivify_rv2hv_helem;
+ case MDEREF_HV_padsv_vivify_rv2hv_helem: /* $lex->{...} */
+ sv = PAD_SVl((++items)->pad_offset);
+ /* FALLTHROUGH */
+ case MDEREF_HV_vivify_rv2hv_helem: /* vivify, ->{...} */
+ if (a_undef(sv))
+ goto ret_undef;
+do_HV_vivify_rv2hv_helem:
+ sv = Perl_vivify_ref(aTHX_ sv, OPpDEREF_HV);
+do_HV_rv2hv_helem:
+ sv = a_do_pp_rv2hv(sv);
+do_HV_helem:
+ {
+ SV *key;
+ assert(SvTYPE(sv) == SVt_PVHV);
+ switch (actions & MDEREF_INDEX_MASK) {
+ case MDEREF_INDEX_none:
+ goto finish;
+ case MDEREF_INDEX_const:
+ key = UNOP_AUX_item_sv(++items);
+ break;
+ case MDEREF_INDEX_padsv:
+ key = PAD_SVl((++items)->pad_offset);
+ break;
+ case MDEREF_INDEX_gvsv:
+ key = UNOP_AUX_item_sv(++items);
+ assert(isGV_with_GP(key));
+ key = GvSVn((GV *) key);
+ break;
+ }
+ PL_multideref_pc = items;
+ if (actions & MDEREF_FLAG_last) {
+ switch (flags & A_HINT_DO) {
+ case A_HINT_FETCH:
+ sv = a_do_pp_hfetch(sv, key);
+ break;
+ case A_HINT_STORE:
+ sv = a_do_pp_hfetch_lv(sv, key);
+ break;
+ case A_HINT_EXISTS:
+ sv = a_do_pp_hexists(sv, key);
+ break;
+ case A_HINT_DELETE:
+ sv = a_do_pp_hdelete(sv, key);
+ break;
+ default:
+ break;
+ }
+ goto finish;
+ }
+ sv = a_do_pp_hfetch(sv, key);
+ break;
+ }
+ }
- o = CALL_FPTR(a_old_ck_padany)(aTHX_ o);
+ actions >>= MDEREF_SHIFT;
+ }
+
+ret_undef:
+ if (flags & (A_HINT_NOTIFY|A_HINT_STORE))
+ a_cannot_vivify(flags);
+ if (flags & A_HINT_EXISTS)
+ sv = &PL_sv_no;
+ else
+ sv = &PL_sv_undef;
+finish:
+ XPUSHs(sv);
+ RETURN;
+}
+
+#endif /* A_HAS_MULTIDEREF */
+
+/* --- Check functions ----------------------------------------------------- */
+
+static void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
+#define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
+
+ if (o->op_type == type && o->op_ppaddr != new_pp
+ && cUNOPo->op_first->op_type != OP_GV) {
+ dA_MAP_THX;
+ const a_op_info *oi = a_map_fetch(o);
+ if (oi) {
+ a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
+ o->op_ppaddr = new_pp;
+ }
+ }
+
+ return;
+}
+
+/* ... ck_pad{any,sv} ...................................................... */
+
+/* Sadly, the padsv OPs we are interested in don't trigger the padsv check
+ * function, but are instead manually mutated from a padany. So we store
+ * the op entry in the op map in the padany check function, and we set their
+ * op_ppaddr member in our peephole optimizer replacement below. */
+
+static OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
+
+static OP *a_ck_padany(pTHX_ OP *o) {
+ UV hint;
+
+ o = a_old_ck_padany(aTHX_ o);
hint = a_hint();
- if (hint & A_HINT_DO) {
- a_pp_padsv_save();
- a_map_store_root(o, a_pp_padsv_saved, hint);
- } else
+ if (hint & A_HINT_DO)
+ a_map_store_root(o, o->op_ppaddr, hint);
+ else
a_map_delete(o);
return o;
}
-STATIC OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
-STATIC OP *a_ck_padsv(pTHX_ OP *o) {
+static OP *a_ck_padsv(pTHX_ OP *o) {
UV hint;
- a_pp_padsv_restore(o);
-
- o = CALL_FPTR(a_old_ck_padsv)(aTHX_ o);
+ o = a_old_ck_padsv(aTHX_ o);
hint = a_hint();
if (hint & A_HINT_DO) {
* modifying context, so the expression can't be resolved yet. It will be at the
* first invocation of a_pp_deref() for this expression. */
-STATIC OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
-STATIC OP *a_ck_deref(pTHX_ OP *o) {
+static OP *a_ck_deref(pTHX_ OP *o) {
OP * (*old_ck)(pTHX_ OP *o) = 0;
UV hint = a_hint();
old_ck = a_old_ck_rv2sv;
break;
}
- o = CALL_FPTR(old_ck)(aTHX_ o);
+ o = old_ck(aTHX_ o);
+
+#if A_HAS_MULTIDEREF
+ if (old_ck == a_old_ck_rv2sv && o->op_flags & OPf_KIDS) {
+ OP *kid = cUNOPo->op_first;
+ if (kid && kid->op_type == OP_GV) {
+ if (hint & A_HINT_DO)
+ a_map_store(kid, kid->op_ppaddr, NULL, hint);
+ else
+ a_map_delete(kid);
+ }
+ }
+#endif
if (hint & A_HINT_DO) {
a_map_store_root(o, o->op_ppaddr, hint);
* rv2[ah]v, resolution is handled by the first call to a_pp_deref() in the
* expression. */
-STATIC OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
-STATIC OP *a_ck_rv2xv(pTHX_ OP *o) {
+static OP *a_ck_rv2xv(pTHX_ OP *o) {
OP * (*old_ck)(pTHX_ OP *o) = 0;
OP * (*new_pp)(pTHX) = 0;
UV hint;
case OP_RV2AV: old_ck = a_old_ck_rv2av; new_pp = a_pp_rv2av; break;
case OP_RV2HV: old_ck = a_old_ck_rv2hv; new_pp = a_pp_rv2hv_simple; break;
}
- o = CALL_FPTR(old_ck)(aTHX_ o);
+ o = old_ck(aTHX_ o);
if (cUNOPo->op_first->op_type == OP_GV)
return o;
* root so that the rest of the expression will see the right context when
* resolving. That's why we don't replace the ppaddr. */
-STATIC OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
-STATIC OP *a_ck_xslice(pTHX_ OP *o) {
+static OP *a_ck_xslice(pTHX_ OP *o) {
OP * (*old_ck)(pTHX_ OP *o) = 0;
UV hint = a_hint();
case OP_HSLICE:
old_ck = a_old_ck_hslice;
if (hint & A_HINT_DO)
- a_recheck_rv2xv(cUNOPo->op_first->op_sibling, OP_RV2HV, a_pp_rv2hv);
+ a_recheck_rv2xv(OpSIBLING(cUNOPo->op_first), OP_RV2HV, a_pp_rv2hv);
break;
}
- o = CALL_FPTR(old_ck)(aTHX_ o);
+ o = old_ck(aTHX_ o);
if (hint & A_HINT_DO) {
a_map_store_root(o, 0, hint);
/* Those ops are only found at the root of a dereferencing expression. We can
* then resolve at compile time if vivification must take place or not. */
-STATIC OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
-STATIC OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
+static OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
+static OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
-STATIC OP *a_ck_root(pTHX_ OP *o) {
+static OP *a_ck_root(pTHX_ OP *o) {
OP * (*old_ck)(pTHX_ OP *o) = 0;
OP * (*new_pp)(pTHX) = 0;
bool enabled = FALSE;
enabled = hint & A_HINT_FETCH;
break;
}
- o = CALL_FPTR(old_ck)(aTHX_ o);
+ o = old_ck(aTHX_ o);
if (hint & A_HINT_DO) {
if (enabled) {
return o;
}
-STATIC U32 a_initialized = 0;
+/* ... Our peephole optimizer .............................................. */
-/* --- XS ------------------------------------------------------------------ */
+static void a_peep_rec(pTHX_ OP *o, ptable *seen);
-MODULE = autovivification PACKAGE = autovivification
+static void a_peep_rec(pTHX_ OP *o, ptable *seen) {
+#define a_peep_rec(O) a_peep_rec(aTHX_ (O), seen)
+ for (; o; o = o->op_next) {
+ dA_MAP_THX;
+ const a_op_info *oi = NULL;
+ UV flags = 0;
-PROTOTYPES: ENABLE
+#if !A_HAS_RPEEP
+ if (ptable_fetch(seen, o))
+ break;
+ ptable_seen_store(seen, o, o);
+#endif
-BOOT:
-{
- if (!a_initialized++) {
- HV *stash;
+ switch (o->op_type) {
+#if A_HAS_RPEEP
+ case OP_NEXTSTATE:
+ case OP_DBSTATE:
+ case OP_STUB:
+ case OP_UNSTACK:
+ if (ptable_fetch(seen, o))
+ return;
+ ptable_seen_store(seen, o, o);
+ break;
+#endif
+ case OP_PADSV:
+ if (o->op_ppaddr != a_pp_deref) {
+ oi = a_map_fetch(o);
+ if (oi && (oi->flags & A_HINT_DO)) {
+ a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
+ o->op_ppaddr = a_pp_deref;
+ }
+ }
+ /* FALLTHROUGH */
+ case OP_AELEM:
+ case OP_AELEMFAST:
+ case OP_HELEM:
+ case OP_RV2SV:
+ if (o->op_ppaddr != a_pp_deref)
+ break;
+ oi = a_map_fetch(o);
+ if (!oi)
+ break;
+ flags = oi->flags;
+ if (!(flags & A_HINT_DEREF)
+ && (flags & A_HINT_DO)
+ && (o->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
+ /* Decide if the expression must autovivify or not. */
+ flags = a_map_resolve(o, oi);
+ }
+ if (flags & A_HINT_DEREF)
+ o->op_private = ((o->op_private & ~OPpDEREF) | OPpLVAL_DEFER);
+ else
+ o->op_ppaddr = oi->old_pp;
+ break;
+ case OP_RV2AV:
+ case OP_RV2HV:
+ if ( o->op_ppaddr != a_pp_rv2av
+ && o->op_ppaddr != a_pp_rv2hv
+ && o->op_ppaddr != a_pp_rv2hv_simple)
+ break;
+ oi = a_map_fetch(o);
+ if (!oi)
+ break;
+ if (!(oi->flags & A_HINT_DEREF))
+ o->op_ppaddr = oi->old_pp;
+ break;
+#if A_HAS_MULTIDEREF
+ case OP_MULTIDEREF:
+ if (o->op_ppaddr != a_pp_multideref) {
+ oi = a_map_fetch(cUNOPo->op_first);
+ if (!oi)
+ break;
+ flags = oi->flags;
+ if (a_do_multideref(o, flags)) {
+ a_map_store_root(o, o->op_ppaddr, flags & ~A_HINT_DEREF);
+ o->op_ppaddr = a_pp_multideref;
+ }
+ }
+ break;
+#endif
+#if !A_HAS_RPEEP
+ case OP_MAPWHILE:
+ case OP_GREPWHILE:
+ case OP_AND:
+ case OP_OR:
+ case OP_ANDASSIGN:
+ case OP_ORASSIGN:
+ case OP_COND_EXPR:
+ case OP_RANGE:
+# if A_HAS_PERL(5, 10, 0)
+ case OP_ONCE:
+ case OP_DOR:
+ case OP_DORASSIGN:
+# endif
+ a_peep_rec(cLOGOPo->op_other);
+ break;
+ case OP_ENTERLOOP:
+ case OP_ENTERITER:
+ a_peep_rec(cLOOPo->op_redoop);
+ a_peep_rec(cLOOPo->op_nextop);
+ a_peep_rec(cLOOPo->op_lastop);
+ break;
+# if A_HAS_PERL(5, 9, 5)
+ case OP_SUBST:
+ a_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
+ break;
+# else
+ case OP_QR:
+ case OP_MATCH:
+ case OP_SUBST:
+ a_peep_rec(cPMOPo->op_pmreplstart);
+ break;
+# endif
+#endif /* !A_HAS_RPEEP */
+ default:
+ break;
+ }
+ }
+}
+
+static void a_peep(pTHX_ OP *o) {
+ ptable *seen;
+ dMY_CXT;
+
+ assert(a_is_loaded(&MY_CXT));
+
+ MY_CXT.old_peep(aTHX_ o);
+
+ seen = MY_CXT.seen;
+ if (seen) {
+ ptable_seen_clear(seen);
+ a_peep_rec(o);
+ ptable_seen_clear(seen);
+ }
+}
+
+/* --- Module setup/teardown ----------------------------------------------- */
+
+static void a_teardown(pTHX_ void *root) {
+ dMY_CXT;
+
+ A_LOADED_LOCK;
+
+ if (a_clear_loaded_locked(&MY_CXT)) {
+ a_ck_restore(OP_PADANY, &a_old_ck_padany);
+ a_ck_restore(OP_PADSV, &a_old_ck_padsv);
+
+ a_ck_restore(OP_AELEM, &a_old_ck_aelem);
+ a_ck_restore(OP_HELEM, &a_old_ck_helem);
+ a_ck_restore(OP_RV2SV, &a_old_ck_rv2sv);
+
+ a_ck_restore(OP_RV2AV, &a_old_ck_rv2av);
+ a_ck_restore(OP_RV2HV, &a_old_ck_rv2hv);
+
+ a_ck_restore(OP_ASLICE, &a_old_ck_aslice);
+ a_ck_restore(OP_HSLICE, &a_old_ck_hslice);
+
+ a_ck_restore(OP_EXISTS, &a_old_ck_exists);
+ a_ck_restore(OP_DELETE, &a_old_ck_delete);
+ a_ck_restore(OP_KEYS, &a_old_ck_keys);
+ a_ck_restore(OP_VALUES, &a_old_ck_values);
+
+ ptable_map_free(a_op_map);
+ a_op_map = NULL;
+
+#ifdef USE_ITHREADS
+ MUTEX_DESTROY(&a_op_map_mutex);
+#endif
+ }
+
+ A_LOADED_UNLOCK;
+
+ if (MY_CXT.old_peep) {
+#if A_HAS_RPEEP
+ PL_rpeepp = MY_CXT.old_peep;
+#else
+ PL_peepp = MY_CXT.old_peep;
+#endif
+ MY_CXT.old_peep = 0;
+ }
+
+ ptable_seen_free(MY_CXT.seen);
+ MY_CXT.seen = NULL;
+
+#if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
+ ptable_hints_free(MY_CXT.tbl);
+ MY_CXT.tbl = NULL;
+#endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
+
+ return;
+}
+
+static void a_setup(pTHX) {
+#define a_setup() a_setup(aTHX)
+ MY_CXT_INIT; /* Takes/release PL_my_ctx_mutex */
+
+ A_LOADED_LOCK;
+
+ if (a_set_loaded_locked(&MY_CXT)) {
+ PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
a_op_map = ptable_new();
+
#ifdef USE_ITHREADS
MUTEX_INIT(&a_op_map_mutex);
#endif
- PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
+ a_ck_replace(OP_PADANY, a_ck_padany, &a_old_ck_padany);
+ a_ck_replace(OP_PADSV, a_ck_padsv, &a_old_ck_padsv);
- a_old_ck_padany = PL_check[OP_PADANY];
- PL_check[OP_PADANY] = MEMBER_TO_FPTR(a_ck_padany);
- a_old_ck_padsv = PL_check[OP_PADSV];
- PL_check[OP_PADSV] = MEMBER_TO_FPTR(a_ck_padsv);
-
- a_old_ck_aelem = PL_check[OP_AELEM];
- PL_check[OP_AELEM] = MEMBER_TO_FPTR(a_ck_deref);
- a_old_ck_helem = PL_check[OP_HELEM];
- PL_check[OP_HELEM] = MEMBER_TO_FPTR(a_ck_deref);
- a_old_ck_rv2sv = PL_check[OP_RV2SV];
- PL_check[OP_RV2SV] = MEMBER_TO_FPTR(a_ck_deref);
-
- a_old_ck_rv2av = PL_check[OP_RV2AV];
- PL_check[OP_RV2AV] = MEMBER_TO_FPTR(a_ck_rv2xv);
- a_old_ck_rv2hv = PL_check[OP_RV2HV];
- PL_check[OP_RV2HV] = MEMBER_TO_FPTR(a_ck_rv2xv);
-
- a_old_ck_aslice = PL_check[OP_ASLICE];
- PL_check[OP_ASLICE] = MEMBER_TO_FPTR(a_ck_xslice);
- a_old_ck_hslice = PL_check[OP_HSLICE];
- PL_check[OP_HSLICE] = MEMBER_TO_FPTR(a_ck_xslice);
-
- a_old_ck_exists = PL_check[OP_EXISTS];
- PL_check[OP_EXISTS] = MEMBER_TO_FPTR(a_ck_root);
- a_old_ck_delete = PL_check[OP_DELETE];
- PL_check[OP_DELETE] = MEMBER_TO_FPTR(a_ck_root);
- a_old_ck_keys = PL_check[OP_KEYS];
- PL_check[OP_KEYS] = MEMBER_TO_FPTR(a_ck_root);
- a_old_ck_values = PL_check[OP_VALUES];
- PL_check[OP_VALUES] = MEMBER_TO_FPTR(a_ck_root);
+ a_ck_replace(OP_AELEM, a_ck_deref, &a_old_ck_aelem);
+ a_ck_replace(OP_HELEM, a_ck_deref, &a_old_ck_helem);
+ a_ck_replace(OP_RV2SV, a_ck_deref, &a_old_ck_rv2sv);
+
+ a_ck_replace(OP_RV2AV, a_ck_rv2xv, &a_old_ck_rv2av);
+ a_ck_replace(OP_RV2HV, a_ck_rv2xv, &a_old_ck_rv2hv);
+
+ a_ck_replace(OP_ASLICE, a_ck_xslice, &a_old_ck_aslice);
+ a_ck_replace(OP_HSLICE, a_ck_xslice, &a_old_ck_hslice);
+
+ a_ck_replace(OP_EXISTS, a_ck_root, &a_old_ck_exists);
+ a_ck_replace(OP_DELETE, a_ck_root, &a_old_ck_delete);
+ a_ck_replace(OP_KEYS, a_ck_root, &a_old_ck_keys);
+ a_ck_replace(OP_VALUES, a_ck_root, &a_old_ck_values);
+ }
+
+ A_LOADED_UNLOCK;
+
+ {
+ HV *stash;
stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
newCONSTSUB(stash, "A_HINT_STRICT", newSVuv(A_HINT_STRICT));
newCONSTSUB(stash, "A_HINT_EXISTS", newSVuv(A_HINT_EXISTS));
newCONSTSUB(stash, "A_HINT_DELETE", newSVuv(A_HINT_DELETE));
newCONSTSUB(stash, "A_HINT_MASK", newSVuv(A_HINT_MASK));
+ newCONSTSUB(stash, "A_THREADSAFE", newSVuv(A_THREADSAFE));
+ newCONSTSUB(stash, "A_FORKSAFE", newSVuv(A_FORKSAFE));
}
+
+#if A_HAS_RPEEP
+ if (PL_rpeepp != a_peep) {
+ MY_CXT.old_peep = PL_rpeepp;
+ PL_rpeepp = a_peep;
+ }
+#else
+ if (PL_peepp != a_peep) {
+ MY_CXT.old_peep = PL_peepp;
+ PL_peepp = a_peep;
+ }
+#endif
+ else {
+ MY_CXT.old_peep = 0;
+ }
+
+ MY_CXT.seen = ptable_new();
+
+#if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
+ MY_CXT.tbl = ptable_new();
+ MY_CXT.owner = aTHX;
+#endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
+
+ call_atexit(a_teardown, NULL);
+
+ return;
+}
+
+/* --- XS ------------------------------------------------------------------ */
+
+MODULE = autovivification PACKAGE = autovivification
+
+PROTOTYPES: ENABLE
+
+BOOT:
+{
+ a_setup();
}
+#if A_THREADSAFE
+
+void
+CLONE(...)
+PROTOTYPE: DISABLE
+PREINIT:
+#if A_WORKAROUND_REQUIRE_PROPAGATION
+ ptable *t;
+#endif
+PPCODE:
+#if A_WORKAROUND_REQUIRE_PROPAGATION
+ {
+ a_ptable_clone_ud ud;
+ dMY_CXT;
+ t = ptable_new();
+ a_ptable_clone_ud_init(ud, t, MY_CXT.owner);
+ ptable_walk(MY_CXT.tbl, a_ptable_clone, &ud);
+ a_ptable_clone_ud_deinit(ud);
+ }
+#endif
+ {
+ MY_CXT_CLONE;
+#if A_WORKAROUND_REQUIRE_PROPAGATION
+ MY_CXT.tbl = t;
+ MY_CXT.owner = aTHX;
+#endif
+ MY_CXT.seen = ptable_new();
+ {
+ int global_setup;
+ A_LOADED_LOCK;
+ global_setup = a_set_loaded_locked(&MY_CXT);
+ assert(!global_setup);
+ A_LOADED_UNLOCK;
+ }
+ }
+ XSRETURN(0);
+
+#endif /* A_THREADSAFE */
+
SV *
_tag(SV *hint)
PROTOTYPE: $