akr	2007-07-14 16:19:59 +0900 (Sat, 14 Jul 2007)

  New Revision: 12785

  Modified files:
    trunk/ChangeLog
    trunk/configure.in
    trunk/cont.c
    trunk/gc.c
    trunk/gc.h
    trunk/thread.c

  Log:
    * configure.in: add --enable-valgrind.
    
    * gc.h (SET_MACHINE_STACK_END): new macro to replace
      rb_gc_set_stack_end.  it find out accurate stack boundary by
      asm using gcc on x86.
    
    * thread.c (rb_gc_set_stack_end): don't define if asm-version
      SET_MACHINE_STACK_END is available.
    
    * gc.c (mark_current_thread): extracted from garbage_collect.
      it use SET_MACHINE_STACK_END to not scan out of stack area.
      it notify conservative GC information to valgrind if
      --enable-valgrind.


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/cont.c?r1=12785&r2=12784
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=12785&r2=12784
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/thread.c?r1=12785&r2=12784
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/gc.c?r1=12785&r2=12784
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/configure.in?r1=12785&r2=12784
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/gc.h?r1=12785&r2=12784