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@gr33n7007h
Created September 12, 2023 15:08
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Enable FrozenCore monkey-patching bytecode
# frozen_string_literal: true
abort 'MJIT needs to be enabled' unless RubyVM::MJIT.enabled?
# make private constants available at top-level
#
constants =
Symbol.all_symbols.select do
RubyVM::MJIT.private_constant _1 rescue next
end
constants.each { Object.const_set _1, RubyVM::MJIT.const_get(_1) }
# dummy method to append iseq
#
def dummy = nil
# find the instructions we need
#
instructions = INSNS.values.select { _1.name =~ /\A(putspecialobject|leave)/ }
# get bytecode object
#
iseq = RubyVM::InstructionSequence.of method(:dummy)
# get pointer for iseq
#
iseq_ptr = C.rb_iseqw_to_iseq iseq
# build the method
#
iseq_ptr.body.iseq_encoded[0] = C.rb_vm_insn_encode instructions[0].bin
iseq_ptr.body.iseq_encoded[1] = 1 # FrozenCore enum type
iseq_ptr.body.iseq_encoded[2] = C.rb_vm_insn_encode instructions[1].bin
FC = dummy
p FC.singleton_methods
__END__
=> [:"core#set_variable_alias",
:"core#undef_method",
:make_shareable,
:make_shareable_copy,
:"core#set_postexe",
:"core#hash_merge_ptr",
:"core#hash_merge_kwd",
:"core#raise",
:"core#sprintf",
:"core#set_method_alias",
:ensure_shareable,
:proc,
:lambda]
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