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ruby33
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Filename :
invariants.rb
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require 'set' module RubyVM::RJIT class Invariants class << self # Called by RubyVM::RJIT::Compiler to lazily initialize this # @param cb [CodeBlock] # @param ocb [CodeBlock] # @param compiler [RubyVM::RJIT::Compiler] # @param exit_compiler [RubyVM::RJIT::ExitCompiler] def initialize(cb, ocb, compiler, exit_compiler) @cb = cb @ocb = ocb @compiler = compiler @exit_compiler = exit_compiler @bop_blocks = Set.new # TODO: actually invalidate this @cme_blocks = Hash.new { |h, k| h[k] = Set.new } @const_blocks = Hash.new { |h, k| h[k] = Set.new } @patches = {} # freeze # workaround a binding.irb issue. TODO: resurrect this end # @param jit [RubyVM::RJIT::JITState] # @param klass [Integer] # @param op [Integer] def assume_bop_not_redefined(jit, klass, op) return false unless C.BASIC_OP_UNREDEFINED_P(klass, op) ensure_block_entry_exit(jit, cause: 'assume_bop_not_redefined') @bop_blocks << jit.block true end # @param jit [RubyVM::RJIT::JITState] def assume_method_lookup_stable(jit, cme) ensure_block_entry_exit(jit, cause: 'assume_method_lookup_stable') @cme_blocks[cme.to_i] << jit.block end # @param jit [RubyVM::RJIT::JITState] def assume_method_basic_definition(jit, klass, mid) if C.rb_method_basic_definition_p(klass, mid) cme = C.rb_callable_method_entry(klass, mid) assume_method_lookup_stable(jit, cme) true else false end end def assume_stable_constant_names(jit, idlist) (0..).each do |i| break if (id = idlist[i]) == 0 @const_blocks[id] << jit.block end end # @param asm [RubyVM::RJIT::Assembler] def record_global_inval_patch(asm, target) asm.pos_marker do |address| if @patches.key?(address) raise 'multiple patches in the same address' end @patches[address] = target end end def on_cme_invalidate(cme) @cme_blocks.fetch(cme.to_i, []).each do |block| @cb.with_write_addr(block.start_addr) do asm = Assembler.new asm.comment('on_cme_invalidate') asm.jmp(block.entry_exit) @cb.write(asm) end # TODO: re-generate branches that refer to this block end @cme_blocks.delete(cme.to_i) end def on_constant_ic_update(iseq, ic, insn_idx) # TODO: check multi ractor as well if ic.entry.ic_cref # No need to recompile the slowpath return end pc = iseq.body.iseq_encoded + insn_idx insn_name = Compiler.decode_insn(pc.*).name if insn_name != :opt_getconstant_path && insn_name != :trace_opt_getconstant_path raise 'insn_idx was not at opt_getconstant_path' end if ic.to_i != pc[1] raise 'insn_idx + 1 was not at the updated IC' end @compiler.invalidate_blocks(iseq, pc.to_i) end def on_constant_state_changed(id) @const_blocks.fetch(id, []).each do |block| @compiler.invalidate_block(block) end end def on_tracing_invalidate_all invalidate_all end def on_update_references # Give up. In order to support GC.compact, you'd have to update ISEQ # addresses in BranchStub, etc. Ideally, we'd need to update moved # pointers in JITed code here, but we just invalidate all for now. invalidate_all end # @param jit [RubyVM::RJIT::JITState] # @param block [RubyVM::RJIT::Block] def ensure_block_entry_exit(jit, cause:) block = jit.block if block.entry_exit.nil? block.entry_exit = Assembler.new.then do |asm| @exit_compiler.compile_entry_exit(block.pc, block.ctx, asm, cause:) @ocb.write(asm) end end end private def invalidate_all # On-Stack Replacement @patches.each do |address, target| # TODO: assert patches don't overlap each other @cb.with_write_addr(address) do asm = Assembler.new asm.comment('on_tracing_invalidate_all') asm.jmp(target) @cb.write(asm) end end @patches.clear C.rjit_for_each_iseq do |iseq| # Avoid entering past code iseq.body.jit_entry = 0 # Avoid reusing past code iseq.body.rjit_blocks.clear if iseq.body.rjit_blocks # Compile this again if not converted to trace_* insns iseq.body.jit_entry_calls = 0 end end end end end