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module RubyVM::RJIT
class JITState < Struct.new(
:iseq, # @param `RubyVM::RJIT::CPointer::Struct_rb_iseq_t`
:pc, # @param [Integer] The JIT target PC
:cfp, # @param `RubyVM::RJIT::CPointer::Struct_rb_control_frame_t` The JIT source CFP (before RJIT is called)
:block, # @param [RubyVM::RJIT::Block]
:stack_size_for_pc, # @param [Integer]
:side_exit_for_pc, # @param [Hash{ Integer => Integer }] { sp_offset => address }
:record_boundary_patch_point, # @param [TrueClass,FalseClass]
)
def initialize(side_exit_for_pc: {}, record_boundary_patch_point: false, **) = super
def insn
Compiler.decode_insn(C.VALUE.new(pc).*)
end
def operand(index, signed: false, ruby: false)
addr = pc + (index + 1) * Fiddle::SIZEOF_VOIDP
value = Fiddle::Pointer.new(addr)[0, Fiddle::SIZEOF_VOIDP].unpack(signed ? 'q' : 'Q')[0]
if ruby
value = C.to_ruby(value)
end
value
end
def at_current_insn?
pc == cfp.pc.to_i
end
def peek_at_local(n)
local_table_size = iseq.body.local_table_size
offset = -C::VM_ENV_DATA_SIZE - local_table_size + n + 1
value = (cfp.ep + offset).*
C.to_ruby(value)
end
def peek_at_stack(depth_from_top)
raise 'not at current insn' unless at_current_insn?
offset = -(1 + depth_from_top)
# rb_rjit_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
def peek_at_block_handler(level)
ep = ep_at_level(cfp, level:)
ep[C::VM_ENV_DATA_INDEX_SPECVAL]
end
private
def ep_at_level(cfp, level:)
ep = cfp.ep
level.times do
# VM_ENV_PREV_EP
ep = C.VALUE.new(ep[C::VM_ENV_DATA_INDEX_SPECVAL] & ~0x03)
end
ep
end
end
end