Return same ISeq object for one src.

* iseq.c: before this patch, RubyVM::InstructionSequence.of(src) (ISeq in
  short) returns different ISeq (wrapper) objects point to one ISeq internal
  object. This patch changes this behavior to cache created ISeq (wrapper)
  objects and return same ISeq object for an internal ISeq object.

* iseq.h (ISEQ_EXECUTABLE_P): introduced to check executable ISeq objects.

* iseq.h (ISEQ_COMPILE_DATA_ALLOC): reordr setting flag line to avoid
  ISEQ_USE_COMPILE_DATA but compiled_data == NULL case.

* vm_core.h (rb_iseq_t): introduce `rb_iseq_t::wrapper` and
  `rb_iseq_t::aux::exec`.  Move `rb_iseq_t::local_hooks` to
  `rb_iseq_t::aux::exec::local_hooks`.

* test/ruby/test_iseq.rb: add ISeq.of() tests.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66246 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 4 deletions

diff --git a/vm_core.h b/vm_core.h
index fd47aed804..b40ef4c2cd 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -473,9 +473,10 @@ struct rb_iseq_constant_body {
 /* T_IMEMO/iseq */
 /* typedef rb_iseq_t is in method.h */
 struct rb_iseq_struct {
-    VALUE flags;
-    struct rb_hook_list_struct *local_hooks;
-    struct rb_iseq_constant_body *body;
+    VALUE flags; /* 1 */
+    VALUE wrapper; /* 2 */
+
+    struct rb_iseq_constant_body *body;  /* 3 */
 
     union { /* 4, 5 words */
 	struct iseq_compile_data *compile_data; /* used at compile time */
@@ -485,7 +486,10 @@ struct rb_iseq_struct {
 	    int index;
 	} loader;
 
-        rb_event_flag_t global_trace_events;
+        struct {
+            struct rb_hook_list_struct *local_hooks;
+            rb_event_flag_t global_trace_events;
+        } exec;
     } aux;
 };