revert old Bootsnap hack

(will fix at least
#69
#66
#64

ruby-debug/ruby-debug-ide#146
)

Author: viuginick1

ext/debase_internals.c

@@ -637,47 +637,6 @@ Debase_enable_file_filtering(VALUE self, VALUE value)
   return value;
 }
 
-#if RUBY_API_VERSION_CODE >= 20500 && !(RUBY_RELEASE_YEAR == 2017 && RUBY_RELEASE_MONTH == 10 && RUBY_RELEASE_DAY == 10)
-    static const rb_iseq_t *
-    my_iseqw_check(VALUE iseqw)
-    {
-        rb_iseq_t *iseq = DATA_PTR(iseqw);
-
-        if (!iseq->body) {
-            ibf_load_iseq_complete(iseq);
-        }
-
-        if (!iseq->body->location.label) {
-            rb_raise(rb_eTypeError, "uninitialized InstructionSequence");
-        }
-        return iseq;
-    }
-
-    static void
-    Debase_set_trace_flag_to_iseq(VALUE self, VALUE rb_iseq) {
-        if (!SPECIAL_CONST_P(rb_iseq) && RBASIC_CLASS(rb_iseq) == rb_cISeq) {
-            rb_iseq_t *iseq = my_iseqw_check(rb_iseq);
-            rb_iseq_trace_set(iseq, RUBY_EVENT_TRACEPOINT_ALL);
-        }
-    }
-
-    static void
-    Debase_unset_trace_flags(VALUE self, VALUE rb_iseq) {
-        if (!SPECIAL_CONST_P(rb_iseq) && RBASIC_CLASS(rb_iseq) == rb_cISeq) {
-            rb_iseq_t *iseq = my_iseqw_check(rb_iseq);
-            rb_iseq_trace_set(iseq, RUBY_EVENT_NONE);
-        }
-    }
-#else
-      static void
-      Debase_set_trace_flag_to_iseq(VALUE self, VALUE rb_iseq) {
-      }
-
-      static void
-      Debase_unset_trace_flags(VALUE self, VALUE rb_iseq) {
-      }
-#endif
-
 static VALUE
 Debase_init_variables()
 {
@@ -721,10 +680,6 @@ Init_debase_internals()
   rb_define_module_function(mDebase, "enable_trace_points", Debase_enable_trace_points, 0);
   rb_define_module_function(mDebase, "prepare_context", Debase_prepare_context, 0);
   rb_define_module_function(mDebase, "init_variables", Debase_init_variables, 0);
-  rb_define_module_function(mDebase, "set_trace_flag_to_iseq", Debase_set_trace_flag_to_iseq, 1);
-
-  //use only for tests
-  rb_define_module_function(mDebase, "unset_iseq_flags", Debase_unset_trace_flags, 1);
 
   idAlive = rb_intern("alive?");
   idAtLine = rb_intern("at_line");

lib/debase.rb

@@ -21,22 +21,9 @@ def start(options={}, &block)
       Debugger.const_set('PROG_SCRIPT', $0) unless defined? Debugger::PROG_SCRIPT
       Debugger.const_set('INITIAL_DIR', Dir.pwd) unless  defined? Debugger::INITIAL_DIR
 
-      monkey_patch_prepend
-
       Debugger.started? ? block && block.call(self) : Debugger.start_(&block)
     end
 
-    def monkey_patch_prepend
-      class << RubyVM::InstructionSequence
-        def self.prepend(mod, *smth)
-          super
-          if mod.to_s.include?('Bootsnap') && RUBY_VERSION >= "2.5"
-            prepend InstructionSequenceMixin
-          end
-        end
-      end
-    end
-
     # @param [String] file
     # @param [Fixnum] line
     # @param [String] expr
@@ -95,21 +82,6 @@ def last_context
     def file_filter
       @file_filter ||= FileFilter.new
     end
-
-    module InstructionSequenceMixin
-      def load_iseq(path)
-        iseq = super(path)
-
-        do_set_flags(iseq)
-
-        iseq
-      end
-
-      def do_set_flags(iseq)
-        Debugger.set_trace_flag_to_iseq(iseq)
-        iseq.each_child { |child_iseq| do_set_flags(child_iseq) } if iseq.respond_to? :each_child
-      end
-    end
   end
 
   class FileFilter

test/test_load.rb

@@ -44,35 +44,4 @@ def test_debug_load
   ensure
     Debugger.stop if Debugger.started?
   end
-
-  module MyBootsnap
-    def load_iseq(path)
-      iseq = RubyVM::InstructionSequence.compile_file(path)
-
-      Debugger.unset_iseq_flags(iseq)
-      iseq
-    end
-  end
-
-  def test_bootsnap
-    @@at_line = nil
-    src_dir = File.dirname(__FILE__)
-    prog_script = File.join(src_dir, 'example', 'bootsnap', 'bootsnap.rb')
-
-    class << RubyVM::InstructionSequence
-      prepend MyBootsnap
-    end
-    bt = Debugger.debug_load(prog_script, true)
-    assert_equal(nil, bt)
-    assert_not_nil(@@at_line)
-    if RUBY_VERSION >= '2.5'
-      assert_equal(['debase.rb', 101], @@at_line)
-    end
-
-    assert(Debugger.started?)
-    Debugger.stop
-
-    class << RubyVM::InstructionSequence; self end.class_eval { undef_method :load_iseq }
-
-  end
 end