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module RubyVM::MJIT
class JITState < Struct.new(
:iseq, # @param `RubyVM::MJIT::CPointer::Struct_rb_iseq_t`
:pc, # @param [Integer] The JIT target PC
:cfp, # @param `RubyVM::MJIT::CPointer::Struct_rb_control_frame_t` The JIT source CFP (before MJIT is called)
:block, # @param [RubyVM::MJIT::Block]
:side_exits, # @param [Hash{ Integer => Integer }] { PC => address }
)
def initialize(side_exits: {}, **) = super
def insn
Compiler.decode_insn(C.VALUE.new(pc).*)
end
def operand(index, signed: false)
addr = pc + (index + 1) * Fiddle::SIZEOF_VOIDP
Fiddle::Pointer.new(addr)[0, Fiddle::SIZEOF_VOIDP].unpack(signed ? 'q' : 'Q')[0]
end
def at_current_insn?
pc == cfp.pc.to_i
end
def peek_at_stack(depth_from_top)
raise 'not at current insn' unless at_current_insn?
offset = -(1 + depth_from_top)
# rb_mjit_branch_stub_hit updates SP, so you don't need to worry about sp_offset
value = (cfp.sp + offset).*
C.to_ruby(value)
end
def peek_at_self
C.to_ruby(cfp.self)
end
end
end
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