rb_execution_context_t: move stack, stack_size and cfp from rb_thread_t

The goal is to reduce rb_context_t and rb_fiber_t size
by removing the need to store the entire rb_thread_t in
there.

[ruby-core:81045] Work-in-progress: soon, we will move more fields here.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/vm_exec.h b/vm_exec.h
index 391eb6d151..7128113f15 100644
--- a/vm_exec.h
+++ b/vm_exec.h
@@ -157,7 +157,7 @@ default:                        \
 
 #endif
 
-#define VM_SP_CNT(th, sp) ((sp) - (th)->stack)
+#define VM_SP_CNT(th, sp) ((sp) - (th)->ec.stack)
 
 #if OPT_CALL_THREADED_CODE
 #define THROW_EXCEPTION(exc) do { \