Merge remote-tracking branch 'mruby/master' into array-clear

33 files changed, 390 insertions, 2123 deletions

diff --git a/.gitignore b/.gitignore
index 7d5f71187..ac8f67310 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,17 +1,10 @@
 # /
 *.bak
-*.dylib
-*.inc
-*.o
-*.a
 *.orig
 *.rej
 *.sav
 *.swp
-*.d
 *.tmp
-*.ctmp
-*.rbtmp
 *~
 .DS_Store
 .ccmalloc
@@ -21,20 +14,3 @@ cscope.out
 /src/y.tab.c
 /bin
 /build
-/mrblib/mrblib.c
-/mrblib/*.*tmp
-/mrblib/mrblib.mrb
-/test/mrbtest
-/test/mrbtest.c
-/test/*.*tmp
-/test/mrubytest.*
-tools/mrbc/mrbc.mrb
-CMakeFiles
-CMakeCache.txt
-/mrbgems/generator
-/mrbgems/gem_init.c
-/mrbgems/g/Makefile
-/mrbgems/g/MakefileGemList
-/mrbgems/g/mrbgemtest.ctmp
-/mrbgems/g/mrbgemtest.rbtmp
-/mrbgems/g/*/gem_srclib.c
diff --git a/Makefile b/Makefile
index 0a2afe2d1..9ed62a255 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,3 @@ test :
 clean :
 	$(RAKE) clean
 
-.PHONY : showconfig
-showconfig :
-	$(RAKE) showconfig
diff --git a/Rakefile b/Rakefile
index da42755f8..d31af964a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -19,6 +19,8 @@ load 'tasks/mrbgems.rake'
 load 'tasks/libmruby.rake'
 load 'tools/mruby/mruby.rake'
 load 'tools/mirb/mirb.rake'
+
+load 'tasks/mrbgems_test.rake'
 load 'test/mrbtest.rake'
 
 ##############################
diff --git a/doc/mrbgems/README.md b/doc/mrbgems/README.md
index cc28f48f8..9e930d8b2 100644
--- a/doc/mrbgems/README.md
+++ b/doc/mrbgems/README.md
@@ -27,6 +27,10 @@ A remote GIT repository location for a GEM is also supported:
 conf.gem :git => 'https://github.com/masuidrive/mrbgems-example.git', :branch => 'master'
 ```
 
+```
+conf.gem :github => 'masuidrive/mrbgems-example', :branch => 'master'
+```
+
 
 ## GEM Structure
 
diff --git a/doc/mrbgems/c_and_ruby_extension_example/.gitignore b/doc/mrbgems/c_and_ruby_extension_example/.gitignore
deleted file mode 100644
index 4c2f4480b..000000000
--- a/doc/mrbgems/c_and_ruby_extension_example/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-# mrbgems
-*.d
-gem_init.c
-gem_test.c
-
diff --git a/doc/mrbgems/c_extension_example/.gitignore b/doc/mrbgems/c_extension_example/.gitignore
deleted file mode 100644
index 4c2f4480b..000000000
--- a/doc/mrbgems/c_extension_example/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-# mrbgems
-*.d
-gem_init.c
-gem_test.c
-
diff --git a/doc/mrbgems/ruby_extension_example/.gitignore b/doc/mrbgems/ruby_extension_example/.gitignore
deleted file mode 100644
index af1362229..000000000
--- a/doc/mrbgems/ruby_extension_example/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-# mrbgems
-*.d
-gem_init.c
-gem_test.c
diff --git a/include/mruby.h b/include/mruby.h
index 29cef451d..845443a1b 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -121,7 +121,10 @@ typedef struct mrb_state {
   size_t gc_threshold;
   int gc_interval_ratio;
   int gc_step_ratio;
-  int gc_disabled;
+  unsigned int gc_disabled:1;
+  unsigned int gc_full:1;
+  unsigned int is_generational_gc_mode:1;
+  size_t majorgc_old_threshold;
   struct alloca_header *mems;
 
   mrb_sym symidx;
@@ -238,16 +241,6 @@ void mrb_write_barrier(mrb_state *, struct RBasic*);
 
 #define MRUBY_VERSION "Rite"
 
-#ifdef DEBUG
-#undef DEBUG
-#endif
-
-#if 0
-#define DEBUG(x) x
-#else
-#define DEBUG(x)
-#endif
-
 mrb_value mrb_check_convert_type(mrb_state *mrb, mrb_value val, mrb_int type, const char *tname, const char *method);
 mrb_value mrb_any_to_s(mrb_state *mrb, mrb_value obj);
 const char * mrb_obj_classname(mrb_state *mrb, mrb_value obj);
diff --git a/src/codegen.c b/src/codegen.c
index ffa13d647..c1a62320d 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -1099,6 +1099,10 @@ codegen(codegen_scope *s, node *tree, int val)
       genop(s, MKOP_AsBx(OP_JMPNOT, cursp(), 0));
 
       codegen(s, tree->cdr->car, val);
+      if (val && !(tree->cdr->car)) {
+        genop(s, MKOP_A(OP_LOADNIL, cursp()));
+        push();
+      }
       if (e) {
         if (val) pop();
         pos2 = new_label(s);
diff --git a/src/gc.c b/src/gc.c
index 888e36620..b3e4b291c 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -117,8 +117,11 @@ gettimeofday_time(void)
     return tv.tv_sec + tv.tv_usec * 1e-6;
 }
 
-#define GC_INVOKE_TIME_REPORT do {\
+#define GC_INVOKE_TIME_REPORT(with) do {\
+  fprintf(stderr, "%s\n", with);\
   fprintf(stderr, "gc_invoke: %19.3f\n", gettimeofday_time() - program_invoke_time);\
+  fprintf(stderr, "is_generational: %d\n", is_generational(mrb));\
+  fprintf(stderr, "is_major_gc: %d\n", is_major_gc(mrb));\
 } while(0)
 
 #define GC_TIME_START do {\
@@ -129,11 +132,14 @@ gettimeofday_time(void)
   gc_time = gettimeofday_time() - gc_time;\
   gc_total_time += gc_time;\
   fprintf(stderr, "gc_state: %d\n", mrb->gc_state);\
+  fprintf(stderr, "live: %d\n", mrb->live);\
+  fprintf(stderr, "majorgc_old_threshold: %d\n", mrb->majorgc_old_threshold);\
+  fprintf(stderr, "gc_threshold: %d\n", mrb->gc_threshold);\
   fprintf(stderr, "gc_time: %30.20f\n", gc_time);\
   fprintf(stderr, "gc_total_time: %30.20f\n\n", gc_total_time);\
 } while(0)
 #else
-#define GC_INVOKE_TIME_REPORT
+#define GC_INVOKE_TIME_REPORT(s)
 #define GC_TIME_START
 #define GC_TIME_STOP_AND_REPORT
 #endif
@@ -141,8 +147,10 @@ gettimeofday_time(void)
 #ifdef GC_DEBUG
 #include <assert.h>
 #define gc_assert(expect) assert(expect)
+#define DEBUG(x) (x)
 #else
 #define gc_assert(expect) ((void)0)
+#define DEBUG(x)
 #endif
 
 #define GC_STEP_SIZE 1024
@@ -200,6 +208,7 @@ struct heap_page {
   struct heap_page *next;
   struct heap_page *free_next;
   struct heap_page *free_prev;
+  unsigned int old:1;
   RVALUE objects[MRB_HEAP_PAGE_SIZE];
 };
 
@@ -268,6 +277,10 @@ add_heap(mrb_state *mrb)
 
 #define DEFAULT_GC_INTERVAL_RATIO 200
 #define DEFAULT_GC_STEP_RATIO 200
+#define DEFAULT_MAJOR_GC_INC_RATIO 200
+#define is_generational(mrb) (mrb->is_generational_gc_mode)
+#define is_major_gc(mrb) (is_generational(mrb) && mrb->gc_full)
+#define is_minor_gc(mrb) (is_generational(mrb) && !mrb->gc_full)
 
 void
 mrb_init_heap(mrb_state *mrb)
@@ -277,6 +290,8 @@ mrb_init_heap(mrb_state *mrb)
   add_heap(mrb);
   mrb->gc_interval_ratio = DEFAULT_GC_INTERVAL_RATIO;
   mrb->gc_step_ratio = DEFAULT_GC_STEP_RATIO;
+  mrb->is_generational_gc_mode = TRUE;
+  mrb->gc_full = TRUE;
 
 #ifdef GC_PROFILE
   program_invoke_time = gettimeofday_time();
@@ -485,7 +500,7 @@ mrb_gc_mark(mrb_state *mrb, struct RBasic *obj)
 {
   if (obj == 0) return;
   if (!is_white(obj)) return;
-  gc_assert(!is_dead(mrb, obj));
+  gc_assert((obj)->tt != MRB_TT_FREE);
   add_gray_list(mrb, obj);
 }
 
@@ -575,8 +590,10 @@ root_scan_phase(mrb_state *mrb)
   int i, j, e;
   mrb_callinfo *ci;
 
-  mrb->gray_list = 0;
-  mrb->variable_gray_list = 0;
+  if (!is_minor_gc(mrb)) {
+    mrb->gray_list = 0;
+    mrb->variable_gray_list = 0;
+  }
 
   mrb_gc_mark_gv(mrb);
   /* mark arena */
@@ -710,13 +727,19 @@ static void
 final_marking_phase(mrb_state *mrb)
 {
   while (mrb->gray_list) {
-    gc_mark_children(mrb, mrb->gray_list);
+    if (is_gray(mrb->gray_list))
+      gc_mark_children(mrb, mrb->gray_list);
+    else
+      mrb->gray_list = mrb->gray_list->gcnext;
   }
   gc_assert(mrb->gray_list == NULL);
   mrb->gray_list = mrb->variable_gray_list;
   mrb->variable_gray_list = 0;
   while (mrb->gray_list) {
-    gc_mark_children(mrb, mrb->gray_list);
+    if (is_gray(mrb->gray_list))
+      gc_mark_children(mrb, mrb->gray_list);
+    else
+      mrb->gray_list = mrb->gray_list->gcnext;
   }
   gc_assert(mrb->gray_list == NULL);
 }
@@ -742,6 +765,11 @@ incremental_sweep_phase(mrb_state *mrb, size_t limit)
     int dead_slot = 1;
     int full = (page->freelist == NULL);
 
+    if (is_minor_gc(mrb) && page->old) {
+      /* skip a slot which doesn't contain any young object */
+      p = e;
+      dead_slot = 0;
+    }
     while (p<e) {
       if (is_dead(mrb, &p->as.basic)) {
         if (p->as.basic.tt != MRB_TT_FREE) {
@@ -752,7 +780,8 @@ incremental_sweep_phase(mrb_state *mrb, size_t limit)
         }
       }
       else {
-        paint_partial_white(mrb, &p->as.basic); /* next gc target */
+        if (!is_minor_gc(mrb))
+          paint_partial_white(mrb, &p->as.basic); /* next gc target */
         dead_slot = 0;
       }
       p++;
@@ -771,6 +800,10 @@ incremental_sweep_phase(mrb_state *mrb, size_t limit)
       if (full && freed > 0) {
         link_free_heap_page(mrb, page);
       }
+      if (page->freelist == NULL && is_minor_gc(mrb))
+        page->old = TRUE;
+      else
+        page->old = FALSE;
       page = page->next;
     }
     tried_sweep += MRB_HEAP_PAGE_SIZE;
@@ -813,20 +846,53 @@ incremental_gc(mrb_state *mrb, size_t limit)
   }
 }
 
+static void
+advance_phase(mrb_state *mrb, enum gc_state to_state)
+{
+  while (mrb->gc_state != to_state) {
+    incremental_gc(mrb, ~0);
+  }
+}
+
+static void
+clear_all_old(mrb_state *mrb)
+{
+  size_t origin_mode = mrb->is_generational_gc_mode;
+
+  gc_assert(is_generational(mrb));
+  if (is_major_gc(mrb)) {
+    advance_phase(mrb, GC_STATE_NONE);
+  }
+  else {
+    mrb->is_generational_gc_mode = FALSE;
+    prepare_incremental_sweep(mrb);
+    advance_phase(mrb, GC_STATE_NONE);
+  }
+  mrb->variable_gray_list = mrb->gray_list = NULL;
+  mrb->is_generational_gc_mode = origin_mode;
+}
+
 void
 mrb_incremental_gc(mrb_state *mrb)
 {
-  size_t limit = 0, result = 0;
-
   if (mrb->gc_disabled) return;
-  GC_INVOKE_TIME_REPORT;
+
+  GC_INVOKE_TIME_REPORT("mrb_incremental_gc()");
   GC_TIME_START;
 
-  limit = (GC_STEP_SIZE/100) * mrb->gc_step_ratio;
-  while (result < limit) {
-    result += incremental_gc(mrb, limit);
-    if (mrb->gc_state == GC_STATE_NONE)
-      break;
+  if (is_minor_gc(mrb)) {
+    do {
+      incremental_gc(mrb, ~0);
+    } while (mrb->gc_state != GC_STATE_NONE);
+  }
+  else {
+    size_t limit = 0, result = 0;
+    limit = (GC_STEP_SIZE/100) * mrb->gc_step_ratio;
+    while (result < limit) {
+      result += incremental_gc(mrb, limit);
+      if (mrb->gc_state == GC_STATE_NONE)
+        break;
+    }
   }
 
   if (mrb->gc_state == GC_STATE_NONE) {
@@ -835,6 +901,16 @@ mrb_incremental_gc(mrb_state *mrb)
     if (mrb->gc_threshold < GC_STEP_SIZE) {
       mrb->gc_threshold = GC_STEP_SIZE;
     }
+    if (is_major_gc(mrb)) {
+      mrb->majorgc_old_threshold = mrb->gc_live_after_mark/100 * DEFAULT_MAJOR_GC_INC_RATIO;
+      mrb->gc_full = FALSE;
+    }
+    else if (is_minor_gc(mrb)) {
+      if (mrb->live > mrb->majorgc_old_threshold) {
+        clear_all_old(mrb);
+        mrb->gc_full = TRUE;
+      }
+    }
   }
   else {
     mrb->gc_threshold = mrb->live + GC_STEP_SIZE;
@@ -850,7 +926,7 @@ mrb_garbage_collect(mrb_state *mrb)
   size_t max_limit = ~0;
 
   if (mrb->gc_disabled) return;
-  GC_INVOKE_TIME_REPORT;
+  GC_INVOKE_TIME_REPORT("mrb_garbage_collect()");
   GC_TIME_START;
 
   if (mrb->gc_state == GC_STATE_SWEEP) {
@@ -860,12 +936,23 @@ mrb_garbage_collect(mrb_state *mrb)
     }
   }
 
+  /* clean all black object as old */
+  if (is_generational(mrb)) {
+    clear_all_old(mrb);
+    mrb->gc_full = TRUE;
+  }
+
   do {
     incremental_gc(mrb, max_limit);
   } while (mrb->gc_state != GC_STATE_NONE);
 
   mrb->gc_threshold = (mrb->gc_live_after_mark/100) * mrb->gc_interval_ratio;
 
+  if (is_generational(mrb)) {
+    mrb->majorgc_old_threshold = mrb->gc_live_after_mark/100 * DEFAULT_MAJOR_GC_INC_RATIO;
+    mrb->gc_full = FALSE;
+  }
+
   GC_TIME_STOP_AND_REPORT;
 }
 
@@ -893,9 +980,9 @@ mrb_field_write_barrier(mrb_state *mrb, struct RBasic *obj, struct RBasic *value
   if (!is_white(value)) return;
 
   gc_assert(!is_dead(mrb, value) && !is_dead(mrb, obj));
-  gc_assert(mrb->gc_state != GC_STATE_NONE);
+  gc_assert(is_generational(mrb) || mrb->gc_state != GC_STATE_NONE);
 
-  if (mrb->gc_state == GC_STATE_MARK) {
+  if (is_minor_gc(mrb) || mrb->gc_state == GC_STATE_MARK) {
     add_gray_list(mrb, value);
   }
   else {
@@ -919,7 +1006,7 @@ mrb_write_barrier(mrb_state *mrb, struct RBasic *obj)
   if (!is_black(obj)) return;
 
   gc_assert(!is_dead(mrb, obj));
-  gc_assert(mrb->gc_state != GC_STATE_NONE);
+  gc_assert(is_generational(mrb) || mrb->gc_state != GC_STATE_NONE);
   paint_gray(obj);
   obj->gcnext = mrb->variable_gray_list;
   mrb->variable_gray_list = obj;
@@ -1051,6 +1138,73 @@ gc_step_ratio_set(mrb_state *mrb, mrb_value obj)
   return mrb_nil_value();
 }
 
+static void
+change_gen_gc_mode(mrb_state *mrb, mrb_int enable)
+{
+  if (is_generational(mrb) && !enable) {
+    if (is_major_gc(mrb)) {
+      advance_phase(mrb, GC_STATE_NONE);
+    }
+    else {
+      clear_all_old(mrb);
+      gc_assert(mrb->gc_state == GC_STATE_NONE);
+    }
+    mrb->gc_full = FALSE;
+  }
+  else if (!is_generational(mrb) && enable) {
+    advance_phase(mrb, GC_STATE_NONE);
+    mrb->majorgc_old_threshold = mrb->gc_live_after_mark/100 * DEFAULT_MAJOR_GC_INC_RATIO;
+    mrb->gc_full = FALSE;
+  }
+  mrb->is_generational_gc_mode = enable;
+}
+
+/*
+ *  call-seq:
+ *     GC.generational_mode -> true or false
+ *
+ *  Returns generational or normal gc mode.
+ *
+ */
+
+static mrb_value
+gc_generational_mode_get(mrb_state *mrb, mrb_value self)
+{
+  if (mrb->is_generational_gc_mode)
+    return mrb_true_value();
+  else
+    return mrb_false_value();
+}
+
+/*
+ *  call-seq:
+ *     GC.generational_mode = true or false -> true or false
+ *
+ *  Changes to generational or normal gc mode.
+ *
+ */
+
+static mrb_value
+gc_generational_mode_set(mrb_state *mrb, mrb_value self)
+{
+  mrb_value enable;
+
+  mrb_get_args(mrb, "o", &enable);
+  if (mrb->is_generational_gc_mode != mrb_test(enable))
+    change_gen_gc_mode(mrb, mrb_test(enable));
+
+  if (mrb_test(enable))
+    return mrb_true_value();
+  else
+    return mrb_false_value();
+}
+
+#ifdef GC_TEST
+#ifdef GC_DEBUG
+static mrb_value gc_test(mrb_state *, mrb_value);
+#endif
+#endif
+
 void
 mrb_init_gc(mrb_state *mrb)
 {
@@ -1064,6 +1218,13 @@ mrb_init_gc(mrb_state *mrb)
   mrb_define_class_method(mrb, gc, "interval_ratio=", gc_interval_ratio_set, ARGS_REQ(1));
   mrb_define_class_method(mrb, gc, "step_ratio", gc_step_ratio_get, ARGS_NONE());
   mrb_define_class_method(mrb, gc, "step_ratio=", gc_step_ratio_set, ARGS_REQ(1));
+  mrb_define_class_method(mrb, gc, "generational_mode=", gc_generational_mode_set, ARGS_REQ(1));
+  mrb_define_class_method(mrb, gc, "generational_mode", gc_generational_mode_get, ARGS_NONE());
+#ifdef GC_TEST
+#ifdef GC_DEBUG
+  mrb_define_class_method(mrb, gc, "test", gc_test, ARGS_NONE());
+#endif
+#endif
 }
 
 #ifdef GC_TEST
@@ -1075,6 +1236,7 @@ test_mrb_field_write_barrier(void)
   struct RBasic *obj, *value;
 
   puts("test_mrb_field_write_barrier");
+  mrb->is_generational_gc_mode = FALSE;
   obj = mrb_basic(mrb_ary_new(mrb));
   value = mrb_basic(mrb_str_new_cstr(mrb, "value"));
   paint_black(obj);
@@ -1094,7 +1256,7 @@ test_mrb_field_write_barrier(void)
   mrb_field_write_barrier(mrb, obj, value);
 
   gc_assert(obj->color & mrb->current_white_part);
-  gc_assert(obj->color & mrb->current_white_part);
+  gc_assert(value->color & mrb->current_white_part);
 
 
   puts("  fail with black");
@@ -1165,6 +1327,7 @@ test_add_gray_list(void)
   struct RBasic *obj1, *obj2;
 
   puts("test_add_gray_list");
+  change_gen_gc_mode(mrb, FALSE);
   gc_assert(mrb->gray_list == NULL);
   obj1 = mrb_basic(mrb_str_new_cstr(mrb, "test"));
   add_gray_list(mrb, obj1);
@@ -1220,19 +1383,20 @@ test_incremental_gc(void)
   struct heap_page *page;
 
   puts("test_incremental_gc");
+  change_gen_gc_mode(mrb, FALSE);
 
+  puts("  in mrb_garbage_collect");
   mrb_garbage_collect(mrb);
 
   gc_assert(mrb->gc_state == GC_STATE_NONE);
+  puts("  in GC_STATE_NONE");
   incremental_gc(mrb, max);
   gc_assert(mrb->gc_state == GC_STATE_MARK);
-
-  incremental_gc(mrb, max);
-  gc_assert(mrb->gc_state == GC_STATE_MARK);
-
-  incremental_gc(mrb, max);
+  puts("  in GC_STATE_MARK");
+  advance_phase(mrb, GC_STATE_SWEEP);
   gc_assert(mrb->gc_state == GC_STATE_SWEEP);
 
+  puts("  in GC_STATE_SWEEP");
   page = mrb->heaps;
   while (page) {
     RVALUE *p = page->objects;
@@ -1267,6 +1431,28 @@ test_incremental_gc(void)
   gc_assert(mrb->live == live);
   gc_assert(mrb->live == total-freed);
 
+  puts("test_incremental_gc(gen)");
+  advance_phase(mrb, GC_STATE_SWEEP);
+  change_gen_gc_mode(mrb, TRUE);
+
+  gc_assert(mrb->gc_full == FALSE);
+  gc_assert(mrb->gc_state == GC_STATE_NONE);
+
+  puts("  in minor");
+  gc_assert(is_minor_gc(mrb));
+  gc_assert(mrb->majorgc_old_threshold > 0);
+  mrb->majorgc_old_threshold = 0;
+  mrb_incremental_gc(mrb);
+  gc_assert(mrb->gc_full == TRUE);
+  gc_assert(mrb->gc_state == GC_STATE_NONE);
+
+  puts("  in major");
+  gc_assert(is_major_gc(mrb));
+  do {
+    mrb_incremental_gc(mrb);
+  } while (mrb->gc_state != GC_STATE_NONE);
+  gc_assert(mrb->gc_full == FALSE);
+
   mrb_close(mrb);
 }
 
@@ -1290,63 +1476,8 @@ test_incremental_sweep_phase(void)
   mrb_close(mrb);
 }
 
-void
-test_gc_api(void)
-{
-  mrb_state *mrb = mrb_open();
-  mrb_value res;
-
-  mrb_value argv[1];
-
-  puts("test_gc_api");
-
-  gc_start(mrb, mrb_nil_value());
-
-  res = gc_interval_ratio_get(mrb, mrb_nil_value());
-  gc_assert(mrb_fixnum(res) == 200);
-
-  argv[0] = mrb_fixnum_value(300);
-  mrb->argv = &argv;
-  mrb->argc = 1;
-
-  gc_interval_ratio_set(mrb, mrb_nil_value());
-  res = gc_interval_ratio_get(mrb, mrb_nil_value());
-  gc_assert(mrb_fixnum(res) == 300);
-
-  res = gc_step_ratio_get(mrb, mrb_nil_value());
-  gc_assert(mrb_fixnum(res) == 200);
-
-  gc_step_ratio_set(mrb, mrb_nil_value());
-  res = gc_step_ratio_get(mrb, mrb_nil_value());
-  gc_assert(mrb_fixnum(res) == 300);
-
-  mrb_close(mrb);
-}
-
-static void
-test_many_object_benchmark(void)
-{
-  mrb_state *mrb = mrb_open();
-  size_t i = 0, j=0;
-  mrb_value ary = mrb_ary_new(mrb);
-  int save_point = mrb_gc_arena_save(mrb);
-
-  puts("test_many_object_benchmark");
-
-  for (i=0; i<1000; i++) {
-    mrb_value cary = mrb_ary_new(mrb);
-    mrb_ary_push(mrb, ary, cary);
-    for (j=0; j<1000; j++) {
-      mrb_ary_push(mrb, cary, mrb_str_new_cstr(mrb, "t"));
-    }
-    mrb_gc_arena_restore(mrb, save_point);
-  }
-
-  mrb_close(mrb);
-}
-
-int
-main(void)
+static mrb_value
+gc_test(mrb_state *mrb, mrb_value self)
 {
   test_mrb_field_write_barrier();
   test_mrb_write_barrier();
@@ -1354,9 +1485,7 @@ main(void)
   test_gc_gray_mark();
   test_incremental_gc();
   test_incremental_sweep_phase();
-  test_gc_api();
-  test_many_object_benchmark();
-  return 0;
+  return mrb_nil_value();
 }
 #endif
 #endif
diff --git a/src/variable.c b/src/variable.c
index 5d46ffc60..6aa6e71bd 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -710,6 +710,7 @@ mrb_mod_cv_set(mrb_state *mrb, struct RClass * c, mrb_sym sym, mrb_value v)
       iv_tbl *t = c->iv;
 
       if (iv_get(mrb, t, sym, NULL)) {
+        mrb_write_barrier(mrb, (struct RBasic*)c);
         iv_put(mrb, t, sym, v);
         return;
       }
@@ -721,6 +722,7 @@ mrb_mod_cv_set(mrb_state *mrb, struct RClass * c, mrb_sym sym, mrb_value v)
     cls->iv = iv_new(mrb);
   }
 
+  mrb_write_barrier(mrb, (struct RBasic*)cls);
   iv_put(mrb, cls->iv, sym, v);
 }
 
@@ -771,6 +773,7 @@ mrb_vm_cv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
       iv_tbl *t = c->iv;
 
       if (iv_get(mrb, t, sym, NULL)) {
+        mrb_write_barrier(mrb, (struct RBasic*)c);
 	iv_put(mrb, t, sym, v);
         return;
       }
@@ -781,6 +784,7 @@ mrb_vm_cv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
   if (!c->iv) {
     c->iv = iv_new(mrb);
   }
+  mrb_write_barrier(mrb, (struct RBasic*)c);
   iv_put(mrb, c->iv, sym, v);
 }
 
diff --git a/src/vm.c b/src/vm.c
index b84158d1d..8ae28ef5e 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -49,7 +49,11 @@ The value below allows about 60000 recursive calls in the simplest case. */
 #define MRB_STACK_MAX ((1<<18) - MRB_STACK_GROWTH)
 #endif
 
-
+#ifdef VM_DEBUG
+# define DEBUG(x) (x)
+#else
+# define DEBUG(x)
+#endif
 
 static inline void
 stack_copy(mrb_value *dst, const mrb_value *src, size_t size)
diff --git a/tasks/mrbgems_test.rake b/tasks/mrbgems_test.rake
new file mode 100644
index 000000000..f247718a0
--- /dev/null
+++ b/tasks/mrbgems_test.rake
@@ -0,0 +1,73 @@
+dir = File.dirname(__FILE__).sub(%r|^\./|, '')
+
+MRuby.each_target do
+  gems.each do |g|
+    test_rbc = "#{g.build_dir}/gem_test.c"
+    test_rbobj = test_rbc.ext('o')
+
+    Rake::FileTask.define_task g.testlib => g.test_objs + [test_rbobj] do |t|
+      g.build.archive t.name, 'rs', t.prerequisites
+    end
+
+    Rake::FileTask.define_task test_rbobj => test_rbc
+    Rake::FileTask.define_task test_rbc => g.test_rbfiles + [g.build.mrbcfile, "#{build_dir}/lib/libmruby.a"] do |t|
+      open(t.name, 'w') do |f|
+        f.puts g.gem_init_header
+        g.build.compile_mruby f, g.test_preload, "gem_test_irep_#{g.funcname}_preload"
+        g.test_rbfiles.each_with_index do |rbfile, i|
+          g.build.compile_mruby f, rbfile, "gem_test_irep_#{g.funcname}_#{i}"
+        end
+        f.puts %Q[void mrb_#{g.funcname}_gem_test(mrb_state *mrb);] unless g.test_objs.empty?
+        f.puts %Q[void GENERATED_TMP_mrb_#{g.funcname}_gem_test(mrb_state *mrb) {]
+        f.puts %Q[  mrb_state *mrb2;]
+        f.puts %Q[  mrb_value val1, val2, ary1, ary2;]
+        f.puts %Q[  int ai;]
+        unless g.test_rbfiles.empty?
+          g.test_rbfiles.count.times do |i|
+            f.puts %Q[  ai = mrb_gc_arena_save(mrb);]
+            f.puts %Q[  mrb2 = mrb_open();]
+            f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_preload);]
+            f.puts %Q[  if (mrb2->exc) {]
+            f.puts %Q[    mrb_p(mrb2, mrb_obj_value(mrb2->exc));]
+            f.puts %Q[    exit(0);]
+            f.puts %Q[  }]
+            f.puts %Q[  mrb_const_set(mrb2, mrb_obj_value(mrb2->object_class), mrb_intern(mrb2, "GEMNAME"), mrb_str_new(mrb2, "#{g.name}", #{g.name.length}));]
+            
+            f.puts %Q[  mrb_#{g.funcname}_gem_test(mrb2);] unless g.test_objs.empty? 
+            
+            f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_#{i});]
+            f.puts %Q[  if (mrb2->exc) {]
+            f.puts %Q[    mrb_p(mrb2, mrb_obj_value(mrb2->exc));]
+            f.puts %Q[    exit(0);]
+            f.puts %Q[  }]
+            f.puts %Q[  ]
+
+            %w(ok_test ko_test kill_test).each do |vname|
+              f.puts %Q[  val1 = mrb_gv_get(mrb2, mrb_intern(mrb, "$#{vname}"));]
+              f.puts %Q[  if(mrb_fixnum_p(val1)) {]
+              f.puts %Q[    val2 = mrb_gv_get(mrb, mrb_intern(mrb, "$#{vname}"));]
+              f.puts %Q[    mrb_gv_set(mrb, mrb_intern(mrb, "$#{vname}"), mrb_fixnum_value(mrb_fixnum(val1) + mrb_fixnum(val2)));]
+              f.puts %Q[  }\n]
+            end
+
+            f.puts %Q[  ary2 = mrb_gv_get(mrb2, mrb_intern(mrb2, "$asserts"));]
+            f.puts %Q[  if(mrb_test(ary2)) {]
+            f.puts %Q[    ary1 = mrb_gv_get(mrb, mrb_intern(mrb, "$asserts"));]
+            f.puts %Q[    val2 = mrb_ary_shift(mrb2, ary2);]
+            f.puts %Q[    ]
+            f.puts %Q[    while(mrb_test(val2)) {]
+            f.puts %Q[      char *str = mrb_string_value_cstr(mrb2, &val2);]
+            f.puts %Q[      mrb_ary_push(mrb, ary1, mrb_str_new(mrb, str, strlen(str)));]
+            f.puts %Q[      val2 = mrb_ary_shift(mrb2, ary2);]
+            f.puts %Q[    }]
+            f.puts %Q[  }]
+            f.puts %Q[  mrb_close(mrb2);]
+            f.puts %Q[  mrb_gc_arena_restore(mrb, ai);]
+          end
+        end
+        f.puts %Q[}]
+      end
+    end
+
+  end
+end
diff --git a/tasks/mruby_build.rake b/tasks/mruby_build.rake
index 65c80ab6a..d5dc075c3 100644
--- a/tasks/mruby_build.rake
+++ b/tasks/mruby_build.rake
@@ -67,6 +67,10 @@ module MRuby
     end
 
     def load_external_gem(params)
+      if params[:github]
+        params[:git] = "[email protected]:#{params[:github]}.git"
+      end
+
       if params[:git]
         url = params[:git]
         gemdir = "build/mrbgems/#{url.match(/([-_\w]+)(\.[-_\w]+|)$/).to_a[1]}"
diff --git a/tasks/mruby_gem_spec.rake b/tasks/mruby_gem_spec.rake
index 9f28b2b6a..c2479412e 100644
--- a/tasks/mruby_gem_spec.rake
+++ b/tasks/mruby_gem_spec.rake
@@ -22,7 +22,7 @@ module MRuby
       attr_array :licenses, :authors
       alias :license= :licenses=
       alias :author= :authors=
-      attr_array :cflags
+      attr_array :cflags, :cxxflags, :objcflags, :asmflags
       attr_array :mruby_cflags, :mruby_includes, :mruby_ldflags, :mruby_libs
 
       attr_array :rbfiles, :objs
@@ -66,46 +66,15 @@ module MRuby
       end
 
       def build_dir
-        return @build_dir if @build_dir
-        @build_dir = "#{build.build_dir}/mrbgems/#{name}"
+        @build_dir ||= "#{build.build_dir}/mrbgems/#{name}"
         FileUtils.mkdir_p @build_dir
         @build_dir
       end
 
       def add_tasks
-        test_rbc = "#{build_dir}/gem_test.c"
-        test_rbobj = test_rbc.ext('o')
-
-        Rake::FileTask.define_task testlib => test_objs + [test_rbobj] do |t|
-          build.archive t.name, 'rs', t.prerequisites
-        end
-
-        Rake::FileTask.define_task test_rbobj => test_rbc
-        Rake::FileTask.define_task test_rbc => [build.mrbcfile] + test_rbfiles do |t|
-          open(t.name, 'w') do |f|
-            f.puts gem_init_header
-            build.compile_mruby f, test_rbfiles, "gem_test_irep_#{funcname}" unless test_rbfiles.empty?
-          end
-
-          open(t.name, 'a') do |f|
-            f.puts "void mrb_#{funcname}_gem_test(mrb_state *mrb);" unless test_objs.empty?
-            f.puts "void GENERATED_TMP_mrb_#{funcname}_gem_test(mrb_state *mrb) {"
-            f.puts "  mrb_#{funcname}_gem_test(mrb);" unless test_objs.empty? 
-            f.puts <<__EOF__ unless test_rbfiles.empty?
-  mrb_load_irep(mrb, gem_test_irep_#{funcname});
-  if (mrb->exc) {
-    mrb_p(mrb, mrb_obj_value(mrb->exc));
-    exit(0);
-  }
-
-__EOF__
-            f.puts "}"
-          end
-        end
-
         Rake::FileTask.define_task "#{build_dir}/gem_init.o" => "#{build_dir}/gem_init.c"
         Rake::FileTask.define_task "#{build_dir}/gem_init.c" => [build.mrbcfile] + rbfiles do |t|
-          generate_gem_init(t.name)
+          generate_gem_init("#{build_dir}/gem_init.c")
         end
       end
 
@@ -149,6 +118,7 @@ __EOF__
           build.compile_mruby f, rbfiles, "gem_mrblib_irep_#{funcname}" unless rbfiles.empty?
           f.puts "void mrb_#{funcname}_gem_init(mrb_state *mrb);"
           f.puts "void GENERATED_TMP_mrb_#{funcname}_gem_init(mrb_state *mrb) {"
+          f.puts "  int ai = mrb_gc_arena_save(mrb);"
           f.puts "  mrb_#{funcname}_gem_init(mrb);" if objs != ["#{build_dir}/gem_init.o"]
           f.puts <<__EOF__ unless rbfiles.empty?
   mrb_load_irep(mrb, gem_mrblib_irep_#{funcname});
@@ -158,6 +128,8 @@ __EOF__
   }
 
 __EOF__
+          f.puts "  mrb_gc_arena_restore(mrb, ai);"
+
           f.puts "}"
         end
       end # generate_gem_init
@@ -177,9 +149,12 @@ __EOF__
 #include "mruby/dump.h"
 #include "mruby/string.h"
 #include "mruby/proc.h"
+#include "mruby/variable.h"
+#include "mruby/array.h"
+#include "mruby/string.h"
 __EOF__
       end # gem_init_header
 
     end # Specification
   end # Gem
-end # MRuby
\ No newline at end of file
+end # MRuby
diff --git a/tasks/rules.rake b/tasks/rules.rake
index 7d988cde3..beda2a864 100644
--- a/tasks/rules.rake
+++ b/tasks/rules.rake
@@ -1,5 +1,5 @@
 def get_dependencies(file)
-  file = file.pathmap('%n.d') unless File.extname(file) == '.d'
+  file = file.ext('d') unless File.extname(file) == '.d'
   if File.exists?(file)
     File.read(file).gsub("\\\n ", "").scan(/^\S+:\s+(.+)$/).flatten.map {|s| s.split(' ') }.flatten
   else
diff --git a/test/assert.rb b/test/assert.rb
index 89e820a00..4fe95de9d 100644
--- a/test/assert.rb
+++ b/test/assert.rb
@@ -5,14 +5,13 @@ $asserts  = []
 $test_start = Time.now if Object.const_defined?(:Time)
 
 ##
-# Print the assertion in a readable way
-def print_assertion_string(str, iso)
-  print(str)
-  if(iso != '')
-    print(' [')
-    print(iso)
-    print(']')
-  end
+# Create the assertion in a readable way
+def assertion_string(err, str, iso=nil, e=nil)
+  msg = "#{err}#{str}"
+  msg += " [#{iso}]" if iso && iso != ''
+  msg += " => #{e.message}" if e
+  msg += " (mrbgems: #{GEMNAME})" if Object.const_defined?(:GEMNAME)
+  msg
 end
 
 ##
@@ -26,7 +25,7 @@ end
 def assert(str = 'Assertion failed', iso = '')
   begin
     if(!yield)
-      $asserts.push(['Fail: ', str, iso])
+      $asserts.push(assertion_string('Fail: ', str, iso))
       $ko_test += 1
       print('F')
     else
@@ -34,7 +33,7 @@ def assert(str = 'Assertion failed', iso = '')
       print('.')
     end
   rescue Exception => e
-    $asserts.push(['Error: ', str, iso, e])
+    $asserts.push(assertion_string('Error: ', str, iso, e))
     $kill_test += 1
     print('X')
   end
@@ -45,14 +44,9 @@ end
 # which were reported broken.
 def report()
   print "\n"
-  $asserts.each do |err, str, iso, e|
-    print(err);
-    print_assertion_string(str, iso)
-    if e
-      print(" => ")
-      print(e.message)
-    end
-    print("\n")
+
+  $asserts.each do |msg|
+    puts msg
   end
 
   $total_test = $ok_test.+($ko_test)
diff --git a/test/mrbtest.rake b/test/mrbtest.rake
index 1d416df2c..cd560d206 100644
--- a/test/mrbtest.rake
+++ b/test/mrbtest.rake
@@ -11,7 +11,7 @@ MRuby.each_target do
   objs = ["#{build_dir}/#{dir}/driver.o", mlib]
 
   file exec => objs + gems.map{ |g| g.testlib } + ["#{build_dir}/lib/libmruby.a"] do |t|
-    link t.name, t.prerequisites, [], gems.map { |g| g.mruby_libs }
+    link t.name, t.prerequisites, gems.map { |g| g.mruby_ldflags }, gems.map { |g| g.mruby_libs }
   end
 
   file mlib => [clib]
@@ -29,4 +29,4 @@ MRuby.each_target do
       f.puts "}"
     end
   end
-end
\ No newline at end of file
+end
diff --git a/test/t/gc.rb b/test/t/gc.rb
new file mode 100644
index 000000000..410272797
--- /dev/null
+++ b/test/t/gc.rb
@@ -0,0 +1,45 @@
+# Not ISO specified
+
+assert('GC.enable') do
+  GC.disable == false
+  GC.enable == true
+  GC.enable == false
+end
+
+assert('GC.disable') do
+  begin
+    GC.disable == false
+    GC.disable == true
+  ensure
+    GC.enable
+  end
+end
+
+assert('GC.interval_ratio=') do
+  origin = GC.interval_ratio
+  begin
+    (GC.interval_ratio = 150) == 150
+  ensure
+    GC.interval_ratio = origin
+  end
+end
+
+assert('GC.step_ratio=') do
+  origin = GC.step_ratio
+  begin
+    (GC.step_ratio = 150) == 150
+  ensure
+    GC.step_ratio = origin
+  end
+end
+
+assert('GC.generational_mode=') do
+  origin = GC.generational_mode
+  begin
+    (GC.generational_mode = false) == false
+    (GC.generational_mode = true) == true
+    (GC.generational_mode = true) == true
+  ensure
+    GC.generational_mode = origin
+  end
+end
diff --git a/tools/mirb/mirb.rake b/tools/mirb/mirb.rake
index 045f6ab90..52f334420 100644
--- a/tools/mirb/mirb.rake
+++ b/tools/mirb/mirb.rake
@@ -5,6 +5,6 @@ MRuby.each_target do
   objs = Dir.glob("#{dir}/*.{c}").map { |f| f.pathmap("#{build_dir}/%X.o") }
 
   file exec => objs + ["#{build_dir}/lib/libmruby.a"] do |t|
-    link t.name, t.prerequisites, [], gems.map { |g| g.mruby_libs }
+    link t.name, t.prerequisites, gems.map { |g| g.mruby_ldflags }, gems.map { |g| g.mruby_libs }
   end
-end
\ No newline at end of file
+end
diff --git a/tools/mrbc/mrbc.rake b/tools/mrbc/mrbc.rake
index 4cca63b6f..cf356ba4f 100644
--- a/tools/mrbc/mrbc.rake
+++ b/tools/mrbc/mrbc.rake
@@ -7,4 +7,4 @@ MRuby.each_target do
   file exec => objs + ["#{build_dir}/lib/libmruby_core.a"] do |t|
     link t.name, t.prerequisites, [], gems.map { |g| g.mruby_libs }
   end
-end
\ No newline at end of file
+end
diff --git a/tools/mruby/mruby.rake b/tools/mruby/mruby.rake
index 4159fadfd..162e8d1ba 100644
--- a/tools/mruby/mruby.rake
+++ b/tools/mruby/mruby.rake
@@ -5,6 +5,6 @@ MRuby.each_target do
   objs = Dir.glob("#{dir}/*.{c}").map { |f| f.pathmap("#{build_dir}/%X.o") }
 
   file exec => objs + ["#{build_dir}/lib/libmruby.a"] do |t|
-    link t.name, t.prerequisites, [], gems.map { |g| g.mruby_libs }
+    link t.name, t.prerequisites, gems.map { |g| g.mruby_ldflags }, gems.map { |g| g.mruby_libs }
   end
-end
\ No newline at end of file
+end
diff --git a/xcode/.gitignore b/xcode/.gitignore
deleted file mode 100644
index bdc490cb8..000000000
--- a/xcode/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-xcuserdata
-build/
-bin/
-lib/
-DerivedData/
\ No newline at end of file
diff --git a/xcode/mruby.xcodeproj/project.pbxproj b/xcode/mruby.xcodeproj/project.pbxproj
deleted file mode 100644
index e147df766..000000000
--- a/xcode/mruby.xcodeproj/project.pbxproj
+++ /dev/null
@@ -1,1449 +0,0 @@
-// !$*UTF8*$!
-{
-	archiveVersion = 1;
-	classes = {
-	};
-	objectVersion = 46;
-	objects = {
-
-/* Begin PBXBuildFile section */
-		8844359B157730E1007F95A4 /* mrbtest.c in Sources */ = {isa = PBXBuildFile; fileRef = 8844359A157730DB007F95A4 /* mrbtest.c */; };
-		8844359C15773120007F95A4 /* libmruby.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 8844353E1576F1A3007F95A4 /* libmruby.a */; };
-		8844359F15773215007F95A4 /* driver.c in Sources */ = {isa = PBXBuildFile; fileRef = 8844356415772EF0007F95A4 /* driver.c */; };
-		88760A97157591E100113BFB /* mrbc.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34C4156C997100F12AC7 /* mrbc.c */; };
-		88760AEA15759F9700113BFB /* y.tab.c in Sources */ = {isa = PBXBuildFile; fileRef = 88EDC30215757CB40098CF0D /* y.tab.c */; };
-		88760AEB15759F9700113BFB /* array.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34D4156C998200F12AC7 /* array.c */; };
-		88760AED15759F9700113BFB /* cdump.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34D6156C998200F12AC7 /* cdump.c */; };
-		88760AEE15759F9700113BFB /* class.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34D7156C998200F12AC7 /* class.c */; };
-		88760AEF15759F9700113BFB /* codegen.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34D9156C998200F12AC7 /* codegen.c */; };
-		88760AF015759F9700113BFB /* compar.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34DA156C998200F12AC7 /* compar.c */; };
-		88760AF115759F9700113BFB /* crc.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34DB156C998200F12AC7 /* crc.c */; };
-		88760AF215759F9700113BFB /* dump.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34DC156C998200F12AC7 /* dump.c */; };
-		88760AF415759F9700113BFB /* enum.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34DF156C998200F12AC7 /* enum.c */; };
-		88760AF515759F9700113BFB /* error.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34E0156C998200F12AC7 /* error.c */; };
-		88760AF615759F9700113BFB /* etc.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34E2156C998200F12AC7 /* etc.c */; };
-		88760AF715759F9700113BFB /* gc.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34E5156C998200F12AC7 /* gc.c */; };
-		88760AF815759F9700113BFB /* hash.c in Sources */ = {isa = PBXBuildFile; fileRef = 88BF34E7156C998200F12AC7 /* hash.c */; };
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index 34652e3bf..000000000
--- a/xcode/mruby.xcodeproj/project.xcworkspace/contents.xcworkspacedata
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deleted file mode 100644
index babd9f8c3..000000000
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diff --git a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/build using make.xcscheme b/xcode/mruby.xcodeproj/xcshareddata/xcschemes/build using make.xcscheme
deleted file mode 100644
index b261aea8b..000000000
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-      buildConfiguration = "Debug"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      allowLocationSimulation = "YES">
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
-      debugDocumentVersioning = "YES">
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/commands.xcscheme b/xcode/mruby.xcodeproj/xcshareddata/xcschemes/commands.xcscheme
deleted file mode 100644
index 1290128e4..000000000
--- a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/commands.xcscheme
+++ /dev/null
@@ -1,114 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0440"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "88760B2315769E6100113BFB"
-               BuildableName = "mruby"
-               BlueprintName = "mruby"
-               ReferencedContainer = "container:mruby.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "88760B3215769F3000113BFB"
-               BuildableName = "mirb"
-               BlueprintName = "mirb"
-               ReferencedContainer = "container:mruby.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "8844358E1577301B007F95A4"
-               BuildableName = "mrbtest"
-               BlueprintName = "mrbtest"
-               ReferencedContainer = "container:mruby.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "88760B2315769E6100113BFB"
-            BuildableName = "mruby"
-            BlueprintName = "mruby"
-            ReferencedContainer = "container:mruby.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-   </TestAction>
-   <LaunchAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8844358E1577301B007F95A4"
-            BuildableName = "mrbtest"
-            BlueprintName = "mrbtest"
-            ReferencedContainer = "container:mruby.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "88760B2315769E6100113BFB"
-            BuildableName = "mruby"
-            BlueprintName = "mruby"
-            ReferencedContainer = "container:mruby.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "CLANGDebug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/framework.xcscheme b/xcode/mruby.xcodeproj/xcshareddata/xcschemes/framework.xcscheme
deleted file mode 100644
index 814a08068..000000000
--- a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/framework.xcscheme
+++ /dev/null
@@ -1,77 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0440"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "88760B731576A33100113BFB"
-               BuildableName = "mruby.framework"
-               BlueprintName = "mruby_fw"
-               ReferencedContainer = "container:mruby.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8844358E1577301B007F95A4"
-            BuildableName = "mrbtest"
-            BlueprintName = "mrbtest"
-            ReferencedContainer = "container:mruby.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-   </TestAction>
-   <LaunchAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8844358E1577301B007F95A4"
-            BuildableName = "mrbtest"
-            BlueprintName = "mrbtest"
-            ReferencedContainer = "container:mruby.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
-      debugDocumentVersioning = "YES">
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "CLANGDebug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/libraries.xcscheme b/xcode/mruby.xcodeproj/xcshareddata/xcschemes/libraries.xcscheme
deleted file mode 100644
index 3f2ddb8c2..000000000
--- a/xcode/mruby.xcodeproj/xcshareddata/xcschemes/libraries.xcscheme
+++ /dev/null
@@ -1,59 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0440"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "88760AA115759B4F00113BFB"
-               BuildableName = "libmruby.a"
-               BlueprintName = "ruby_lib"
-               ReferencedContainer = "container:mruby.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
-      <Testables>
-      </Testables>
-   </TestAction>
-   <LaunchAction
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      allowLocationSimulation = "YES">
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
-      debugDocumentVersioning = "YES">
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "CLANGDebug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/xcode/mruby_fw/en.lproj/InfoPlist.strings b/xcode/mruby_fw/en.lproj/InfoPlist.strings
deleted file mode 100644
index 477b28ff8..000000000
--- a/xcode/mruby_fw/en.lproj/InfoPlist.strings
+++ /dev/null
@@ -1,2 +0,0 @@
-/* Localized versions of Info.plist keys */
-
diff --git a/xcode/mruby_fw/mruby_fw-Info.plist b/xcode/mruby_fw/mruby_fw-Info.plist
deleted file mode 100644
index 6721d7109..000000000
--- a/xcode/mruby_fw/mruby_fw-Info.plist
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>English</string>
-	<key>CFBundleExecutable</key>
-	<string>${EXECUTABLE_NAME}</string>
-	<key>CFBundleIconFile</key>
-	<string></string>
-	<key>CFBundleIdentifier</key>
-	<string>com.github.mruby.${PRODUCT_NAME:rfc1034identifier}</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>${PRODUCT_NAME}</string>
-	<key>CFBundlePackageType</key>
-	<string>FMWK</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>1</string>
-	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2012 mruby Authors. All rights reserved.</string>
-	<key>NSPrincipalClass</key>
-	<string></string>
-</dict>
-</plist>
diff --git a/xcode/mruby_fw/mruby_fw-Prefix.pch b/xcode/mruby_fw/mruby_fw-Prefix.pch
deleted file mode 100644
index 8be6acecb..000000000
--- a/xcode/mruby_fw/mruby_fw-Prefix.pch
+++ /dev/null
@@ -1,7 +0,0 @@
-//
-// Prefix header for all source files of the 'mruby_fw' target in the 'mruby_fw' project
-//
-
-#ifdef __OBJC__
-  #import <Cocoa/Cocoa.h>
-#endif