rename absolute_path to realpath internally and introduce pathobj.

* vm_core.h: rename absolute_path to realpath because it is expected name.
  external APIs (#absolute_path methods) are remained.

* vm_core.h: remove rb_iseq_location_struct::path and
  rb_iseq_location_struct::absolute_path and introduce pathobj.
  if given path equals to given absolute_path (and most of case
  it is true), pathobj is simply given path String. If it is not same,
  pathobj is Array and pathobj[0] is path and pathobj[1] is realpath.

  This size optimization reduce 8 bytes and
  sizeof(struct rb_iseq_constant_body) is 200 bytes -> 192 bytes
  on 64bit CPU.

  To support this change, the following functions are introduced:
    * pathobj_path() (defined in vm_core.h)
    * pathobj_realpath() (ditto)
    * rb_iseq_path() (decl. in vm_core.h)
    * rb_iseq_realpath() (ditto)
    * rb_iseq_pathobj_new() (ditto)
    * rb_iseq_pathobj_set() (ditto)

* vm_core.h (rb_binding_t): use pathobj instead of path. If binding
  is given at eval methods, realpath (absolute_path) was caller's
  realpath. However, they should use binding's realpath.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 12 deletions

diff --git a/vm_eval.c b/vm_eval.c
index 345eba753a..86541cc845 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1296,20 +1296,20 @@ eval_string_with_cref(VALUE self, VALUE src, VALUE scope, rb_cref_t *const cref_
 	rb_cref_t *cref = cref_arg;
 	rb_binding_t *bind = 0;
 	const rb_iseq_t *iseq;
-	VALUE absolute_path = Qnil;
+	VALUE realpath = Qnil;
 	VALUE fname;
 
 	if (file != Qundef) {
-	    absolute_path = file;
+	    realpath = file;
 	}
 
 	if (!NIL_P(scope)) {
 	    bind = Check_TypedStruct(scope, &ruby_binding_data_type);
 
-	    if (NIL_P(absolute_path) && !NIL_P(bind->path)) {
-		file = bind->path;
+	    if (NIL_P(realpath)) {
+		file = pathobj_path(bind->pathobj);
+		realpath = pathobj_realpath(bind->pathobj);
 		line = bind->first_lineno;
-		absolute_path = rb_current_realfilepath();
 	    }
 	    base_block = &bind->block;
 	}
@@ -1332,13 +1332,8 @@ eval_string_with_cref(VALUE self, VALUE src, VALUE scope, rb_cref_t *const cref_
 	    fname = rb_usascii_str_new_cstr("(eval)");
 	}
 
-	if (RTEST(fname))
-	    fname = rb_fstring(fname);
-	if (RTEST(absolute_path))
-	    absolute_path = rb_fstring(absolute_path);
-
 	/* make eval iseq */
-	iseq = rb_iseq_compile_with_option(src, fname, absolute_path, INT2FIX(line), base_block, Qnil);
+	iseq = rb_iseq_compile_with_option(src, fname, realpath, INT2FIX(line), base_block, Qnil);
 
 	if (!iseq) {
 	    rb_exc_raise(adjust_backtrace_in_eval(th, th->errinfo));
@@ -2180,7 +2175,7 @@ rb_current_realfilepath(void)
     rb_thread_t *th = GET_THREAD();
     rb_control_frame_t *cfp = th->ec.cfp;
     cfp = vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
-    if (cfp != 0) return cfp->iseq->body->location.absolute_path;
+    if (cfp != 0) return rb_iseq_realpath(cfp->iseq);
     return Qnil;
 }