do not disable `trace_` prefix insns.

* vm.c: introduce `ruby_vm_event_enabled_flags` which represents which
  event flags are enabled before.

* vm_trace.c: do not turn off `trace_` prefix instructions because turn on
  overhead is a matter if a program repeats turn on and turn off frequently.

* iseq.c (finish_iseq_build): respect `ruby_vm_event_enabled_flags`.

* vm_insnhelper.c (vm_trace): check `ruby_vm_event_flags` and disable
  lazy trace-off technique (do not disable traces).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/vm_core.h b/vm_core.h
index f458da7203..374fcff1b2 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1591,6 +1591,7 @@ RUBY_SYMBOL_EXPORT_BEGIN
 extern rb_vm_t *ruby_current_vm_ptr;
 extern rb_execution_context_t *ruby_current_execution_context_ptr;
 extern rb_event_flag_t ruby_vm_event_flags;
+extern rb_event_flag_t ruby_vm_event_enabled_flags;
 
 RUBY_SYMBOL_EXPORT_END