vm_trace.c (update_global_event_hook): set only when tracing is added.
If tracing was off (event flags are decreased), then ignore them.
Next trace_ prefix instruction will trace off itself (lazy tracing off).
vm_insnhelper.c (vm_trace): trace-off for when trace is not needed.
iseq.c (rb_iseq_trace_set): fix trace-off process (it was never off tracing).
Added by ko1 (Koichi Sasada) over 7 years ago
remove
trace_prefix insns lazily.vm_trace.c (update_global_event_hook): set only when tracing is added.
If tracing was off (event flags are decreased), then ignore them.
Next
trace_prefix instruction will trace off itself (lazy tracing off).vm_insnhelper.c (vm_trace): trace-off for when trace is not needed.
iseq.c (rb_iseq_trace_set): fix trace-off process (it was never off tracing).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60817 b2dd03c8-39d4-4d8f-98ff-823fe69b080e