Make tracepoints with set_trace_func or TracePoint.new ractor local (DRAFT) #15468
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Before this change, GC'ing any Ractor object caused you to lose all enabled tracepoints across all ractors (even main). Now tracepoints are ractor-local and this doesn't happen. Internal events are still global. Fixes [Bug #19112]
Add tracing variables `ruby_vm_iseq_events_enabled` and `ruby_vm_c_events_enabled`. We can use `ruby_vm_iseq_events_enabled` to rewrite all traced instructions back to regular instructions, which we don't do currently. We use `ruby_vm_c_events_enabled` because YJIT needs this information.
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Before this change, GC'ing any Ractor object caused you to lose all enabled tracepoints across all ractors (even main). Now tracepoints are ractor-local and this doesn't happen. Internal events are still global.
Fixes [Bug #19112]