[ruby-core:122110] [Ruby Bug#21338] TracePoint Not Triggered for Kernel#block_given?

Issue #21338 has been updated by cfis (Charlie Savage).


ruby-prof does listen for C calls. See:

https://github.com/ruby-prof/ruby-prof/blob/master/ext/ruby_prof/rp_profile.c#L337

``` c
void prof_install_hook(VALUE self)
{
    prof_profile_t* profile = prof_get_profile(self);

    VALUE event_tracepoint = rb_tracepoint_new(Qnil,
                                               RUBY_EVENT_CALL | RUBY_EVENT_RETURN |
                                               RUBY_EVENT_C_CALL | RUBY_EVENT_C_RETURN |
                                               RUBY_EVENT_LINE,
                                               prof_event_hook, profile);
```

Once again, this is change in behavior between 3.3 and 3.4. Was it intentional?

----------------------------------------
Bug #21338: TracePoint Not Triggered for Kernel#block_given?
https://bugs.ruby-lang.org/issues/21338#change-113263

* Author: cfis (Charlie Savage)
* Status: Rejected
* ruby -v: ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [x86_64-linux]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
When updating ruby-prof for Ruby 3.4, various tests now fail because a method enter/leave tracepoint is not triggered for `Kernel#block_given?` For example:

https://github.com/ruby-prof/ruby-prof/blob/master/test/line_number_test.rb#L184

In 3.3 a tracepoint was triggered but not in earlier Ruby versions.



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