From 0183613bf9d1d5c14be9fdf34af31ea1b94eb48e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 19 May 2017 14:58:38 +0000
Subject: compile.c: dump_disasm_list_with_cursor

* compile.c (dump_disasm_list_with_cursor): improve disassemble
  list.  show whole elemetns and mark the current element.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58797 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 compile.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/compile.c b/compile.c
index 18e1ac8090..e89aa5418b 100644
--- a/compile.c
+++ b/compile.c
@@ -427,7 +427,8 @@ freeze_hide_obj(VALUE obj)
 #define gl_node_level ISEQ_COMPILE_DATA(iseq)->node_level
 #endif
 
-static void dump_disasm_list(LINK_ELEMENT *elem);
+static void dump_disasm_list_with_cursor(const LINK_ELEMENT *elem, const LINK_ELEMENT *curr);
+static void dump_disasm_list(const LINK_ELEMENT *elem);
 
 static int insn_data_length(INSN *iobj);
 static int calc_sp_depth(int depth, INSN *iobj);
@@ -1631,7 +1632,7 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor)
     line_info_index = code_index = sp = 0;
 
 #define BADINSN_ERROR \
-    (dump_disasm_list(list), \
+    (dump_disasm_list_with_cursor(&anchor->anchor, list), \
      xfree(generated_iseq), \
      xfree(line_info_table), \
      COMPILE_ERROR)
@@ -6494,7 +6495,13 @@ insn_data_to_s_detail(INSN *iobj)
 }
 
 static void
-dump_disasm_list(struct iseq_link_element *link)
+dump_disasm_list(const LINK_ELEMENT *link)
+{
+    dump_disasm_list_with_cursor(link, NULL);
+}
+
+static void
+dump_disasm_list_with_cursor(const LINK_ELEMENT *link, const LINK_ELEMENT *curr)
 {
     int pos = 0;
     INSN *iobj;
@@ -6504,6 +6511,7 @@ dump_disasm_list(struct iseq_link_element *link)
     printf("-- raw disasm--------\n");
 
     while (link) {
+	if (curr) putc(curr == link ? '*' : ' ', stdout);
 	switch (link->type) {
 	  case ISEQ_ELEMENT_INSN:
 	    {
-- 
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