rb_add_event_hook  815 ext/win32ole/win32ole.c 	rb_add_event_hook(ole_uninitialize_hook, RUBY_EVENT_THREAD_END, Qnil);
rb_add_event_hook   55 include/ruby/debug.h void rb_add_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
rb_add_event_hook 2107 include/ruby/ruby.h void rb_add_event_hook(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
rb_add_event_hook 4957 thread.c           rb_add_event_hook(update_coverage, RUBY_EVENT_COVERAGE, Qnil);
rb_add_event_hook  503 vm_trace.c         rb_add_event_hook(call_trace_func, RUBY_EVENT_ALL, trace);