https://git.ruby-lang.org/ruby.git/commit/?id=51be2cf6d2

From 51be2cf6d23466e173ad66eac9a4b3ae32097cc4 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 28 Jun 2022 14:29:12 +0900
Subject: [ruby/rdoc] Parse also InitVM-prefixed functions

Initialization depending on VM is separated.

https://github.com/ruby/rdoc/commit/030d10fccd
---
 lib/rdoc/parser/c.rb            |  2 +-
 test/rdoc/test_rdoc_parser_c.rb | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/rdoc/parser/c.rb b/lib/rdoc/parser/c.rb
index 52317c5ad8..83a216a8ac 100644
--- a/lib/rdoc/parser/c.rb
+++ b/lib/rdoc/parser/c.rb
@@ -720,7 +720,7 @@ class RDoc::Parser::C < RDoc::Parser https://github.com/ruby/ruby/blob/trunk/lib/rdoc/parser/c.rb#L720
         ((?>/\*.*?\*/\s+))
         (static\s+)?
         void\s+
-        Init_#{class_name}\s*(?:_\(\s*)?\(\s*(?:void\s*)?\)%xmi then
+        Init(?:VM)?_(?i:#{class_name})\s*(?:_\(\s*)?\(\s*(?:void\s*)?\)%xm then
       comment = $1.sub(%r%Document-(?:class|module):\s+#{class_name}%, '')
     elsif @content =~ %r%Document-(?:class|module):\s+#{class_name}\s*?
                          (?:<\s+[:,\w]+)?\n((?>.*?\*/))%xm then
diff --git a/test/rdoc/test_rdoc_parser_c.rb b/test/rdoc/test_rdoc_parser_c.rb
index c7312bebba..b7e1648cd6 100644
--- a/test/rdoc/test_rdoc_parser_c.rb
+++ b/test/rdoc/test_rdoc_parser_c.rb
@@ -857,6 +857,23 @@ Init_Foo(void) { https://github.com/ruby/ruby/blob/trunk/test/rdoc/test_rdoc_parser_c.rb#L857
     assert_equal "a comment for class Foo", klass.comment.text
   end
 
+
+  def test_find_class_comment_initvm
+    content = <<-EOF
+/*
+ * a comment for class Foo
+ */
+void
+InitVM_Foo(void) {
+  VALUE foo = rb_define_class("Foo", rb_cObject);
+}
+    EOF
+
+    klass = util_get_class content, 'foo'
+
+    assert_equal "a comment for class Foo", klass.comment.text
+  end
+
   def test_find_class_comment_define_class
     content = <<-EOF
 /*
-- 
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