merged revision(s) 37075,37076,37082,37083,37088: [Backport #7123]

* gc.c: Use the non-recursive marking instead of recursion. The
  recursion marking of CRuby needs checking stack overflow and the
  fail-safe system, but these systems not good at partial points,
  for example, marking deep tree structures. [ruby-dev:46184]
  [Feature #7095]

* configure.in (GC_MARK_STACKFRAME_WORD): removed. It's used by
  checking stack overflow of marking.

* win32/Makefile.sub (GC_MARK_STACKFRAME_WORD): ditto.

* gc.c (free_stack_chunks): it is used only when per-VM object space
  is enabled.

* gc.c (rb_objspace_call_finalizer): mark self-referencing finalizers
  before run finalizers, to fix SEGV from btest on 32bit.

* gc.c (gc_mark_stacked_objects): extract from gc_marks().

* gc.c (rb_objspace_call_finalizer): call gc_mark_stacked_objects
  at suitable point.

* gc.c (init_heap): call init_mark_stack before to allocate
  altstack. This change avoid the stack overflow at the signal
  handler on 32bit, but I don't understand reason... [Feature #7095]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@37648 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 57 deletions

diff --git a/configure.in b/configure.in
index b006a01a81..c64d981006 100644
--- a/configure.in
+++ b/configure.in
@@ -1268,63 +1268,6 @@ if test $rb_cv_stack_end_address != no; then
   AC_DEFINE_UNQUOTED(STACK_END_ADDRESS, $rb_cv_stack_end_address)
 fi
 
-AC_CACHE_CHECK(for gc_mark and gc_children stack frame approximate size(word), rb_cv_gc_mark_stackframe_word,
-[save_CFLAGS="$CFLAGS"
-CFLAGS="-O0"
-AC_TRY_RUN([
-int word;
-char *stack_start;
-
-void
-set_stackframe_word()
-{
-    int dumy = 42;
-    int diff;
-
-    if (stack_start < (char *)&dumy) {
-        diff = (int)((char *)&dumy - stack_start);
-    }
-    else {
-        diff = (int)(stack_start - (char *)&dumy);
-    }
-    word = (diff/sizeof(void *));
-    if ((diff % sizeof(void *)) != 0) {
-        word++;
-    }
-}
-
-void
-gc_mark_children(void *p1, void *p2, int lev)
-{
-    void *obj = p2;
-
-    set_stackframe_word(p1,p2,lev);
-}
-
-void
-gc_mark(void *p1, void *p2, int lev)
-{
-    void *obj = p2;
-
-    gc_mark_children(p1,p2,lev++);
-}
-
-int
-main() {
-  int dumy = 42;
-
-  stack_start = (char *)&dumy;
-  gc_mark(0, 0, 255);
-  return word;
-}
-],
-  [rb_cv_gc_mark_stackframe_word="$?"],
-  [rb_cv_gc_mark_stackframe_word="$?"],
-  [rb_cv_gc_mark_stackframe_word="30"])
-CFLAGS="$save_CFLAGS"])
-AC_DEFINE_UNQUOTED(GC_MARK_STACKFRAME_WORD, $rb_cv_gc_mark_stackframe_word)
-
-
 dnl Checks for library functions.
 AC_TYPE_GETGROUPS
 AC_TYPE_SIGNAL