GvNAME() is shared from 5.10 onwards.

[p5sagit/Devel-Size.git] / Size.xs

diff --git a/Size.xs b/Size.xs
index 7cd3ea7..e588b67 100644 (file)
--- a/Size.xs
+++ b/Size.xs
@@ -1,3 +1,5 @@
+/* -*- mode: C -*- */
+
 #define PERL_NO_GET_CONTEXT
 
 #include "EXTERN.h"
@@ -15,6 +17,17 @@
 #ifndef SvOOK_offset
 #  define SvOOK_offset(sv, len) STMT_START { len = SvIVX(sv); } STMT_END
 #endif
+#ifndef SvIsCOW
+#  define SvIsCOW(sv)           ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
+                                    (SVf_FAKE | SVf_READONLY))
+#endif
+#ifndef SvIsCOW_shared_hash
+#  define SvIsCOW_shared_hash(sv)   (SvIsCOW(sv) && SvLEN(sv) == 0)
+#endif
+#ifndef SvSHARED_HEK_FROM_PV
+#  define SvSHARED_HEK_FROM_PV(pvx) \
+        ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
+#endif
 
 #if PERL_VERSION < 6
 #  define PL_opargs opargs
@@ -146,7 +159,7 @@ free_tracking_at(void **tv, int level)
        /* Nodes */
        do {
            if (tv[i]) {
-               free_tracking_at(tv[i], level);
+               free_tracking_at((void **) tv[i], level);
                Safefree(tv[i]);
            }
        } while (i--);
@@ -523,6 +536,29 @@ op_size(pTHX_ const OP * const baseop, struct state *st)
   }
 }
 
+static void
+hek_size(pTHX_ struct state *st, HEK *hek, U32 shared)
+{
+    /* Hash keys can be shared. Have we seen this before? */
+    if (!check_new(st, hek))
+       return;
+    st->total_size += HEK_BASESIZE + hek->hek_len
+#if PERL_VERSION < 8
+       + 1 /* No hash key flags prior to 5.8.0  */
+#else
+       + 2
+#endif
+       ;
+    if (shared) {
+#if PERL_VERSION < 10
+       st->total_size += sizeof(struct he);
+#else
+       st->total_size += STRUCT_OFFSET(struct shared_he, shared_he_hek);
+#endif
+    }
+}
+
+
 #if PERL_VERSION < 8 || PERL_SUBVERSION < 9
 #  define SVt_LAST 16
 #endif
@@ -698,12 +734,7 @@ sv_size(pTHX_ struct state *const st, const SV * const orig_thing,
         cur_entry = *(HvARRAY(thing) + cur_bucket);
         while (cur_entry) {
           st->total_size += sizeof(HE);
-          if (cur_entry->hent_hek) {
-            /* Hash keys can be shared. Have we seen this before? */
-            if (check_new(st, cur_entry->hent_hek)) {
-              st->total_size += HEK_BASESIZE + cur_entry->hent_hek->hek_len + 2;
-            }
-          }
+         hek_size(aTHX_ st, cur_entry->hent_hek, HvSHAREKEYS(thing));
          if (recurse >= TOTAL_SIZE_RECURSION)
              sv_size(aTHX_ st, HeVAL(cur_entry), recurse);
           cur_entry = cur_entry->hent_next;
@@ -763,8 +794,14 @@ sv_size(pTHX_ struct state *const st, const SV * const orig_thing,
 
   case SVt_PVGV: TAG;
     if(isGV_with_GP(thing)) {
+#ifdef GvNAME_HEK
+       hek_size(aTHX_ st, GvNAME_HEK(thing), 1);
+#else  
        st->total_size += GvNAMELEN(thing);
-#ifdef GvFILE
+#endif
+#ifdef GvFILE_HEK
+       hek_size(aTHX_ st, GvFILE_HEK(thing), 1);
+#elif defined(GvFILE)
 #  if !defined(USE_ITHREADS) || (PERL_VERSION > 8 || (PERL_VERSION == 8 && PERL_SUBVERSION > 8))
        /* With itreads, before 5.8.9, this can end up pointing to freed memory
           if the GV was created in an eval, as GvFILE() points to CopFILE(),
@@ -800,6 +837,8 @@ sv_size(pTHX_ struct state *const st, const SV * const orig_thing,
   freescalar:
     if(recurse && SvROK(thing))
        sv_size(aTHX_ st, SvRV_const(thing), recurse);
+    else if (SvIsCOW_shared_hash(thing))
+       hek_size(aTHX_ st, SvSHARED_HEK_FROM_PV(SvPVX(thing)), 1);
     else
        st->total_size += SvLEN(thing);