check trace flags at loading [Bug #14702]

* iseq.c (iseq_init_trace): at ISeq loading time, we need to check
  `ruby_vm_event_enabled_flags` to turn on trace instructions.
  Seprate this checking code from `finish_iseq_build()` and make
  new function. `iseq_ibf_load()` calls this funcation after loading.

* test/ruby/test_iseq.rb: add a test for this fix.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 86aad2da69..d193f41c6e 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -438,4 +438,18 @@ class TestISeq < Test::Unit::TestCase
       end
     end;
   end
+
+  def test_to_binary_tracepoint
+    filename = "#{File.basename(__FILE__)}_#{__LINE__}"
+    iseq = RubyVM::InstructionSequence.compile("x = 1\n y = 2", filename)
+    iseq_bin = iseq.to_binary
+    ary = []
+    TracePoint.new(:line){|tp|
+      next unless tp.path == filename
+      ary << [tp.path, tp.lineno]
+    }.enable{
+      ISeq.load_from_binary(iseq_bin).eval
+    }
+    assert_equal [[filename, 1], [filename, 2]], ary, '[Bug #14702]'
+  end
 end