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def inline_text argc, prev_insn
raise "argc (#{argc}) of inline! should be 1" unless argc == 1
raise "1st argument should be string literal" unless prev_insn[0] == :putstring
prev_insn[1].rstrip
end
def make_cfunc_name inlines, name, lineno
case name
when /\[\]/
name = '_GETTER'
when /\[\]=/
name = '_SETTER'
else
name = name.tr('!?', 'EP')
end
base = "builtin_inline_#{name}_#{lineno}"
if inlines[base]
1000.times{|i|
name = "#{base}_#{i}"
return name unless inlines[name]
}
raise "too many functions in same line..."
else
base
end
end
def collect_builtin base, iseq_ary, name, bs, inlines
case type = iseq_ary[9]
when :method
name = iseq_ary[5]
when :class
name = 'class'
else
end
code = iseq_ary[13]
params = iseq_ary[10]
prev_insn = nil
lineno = nil
code.each{|insn|
case insn
when Array
# ok
when Integer
lineno = insn
next
else
next
end
next unless Array === insn
case insn[0]
when :send
ci = insn[1]
if /\A__builtin_(.+)/ =~ ci[:mid]
cfunc_name = func_name = $1
argc = ci[:orig_argc]
if /(.+)\!\z/ =~ func_name
case $1
when 'cstmt'
text = inline_text argc, prev_insn
func_name = "_bi#{inlines.size}"
cfunc_name = make_cfunc_name(inlines, name, lineno)
inlines[cfunc_name] = [lineno, text, params, func_name]
argc -= 1
when 'cexpr', 'cconst'
text = inline_text argc, prev_insn
code = "return #{text};"
func_name = "_bi#{inlines.size}"
cfunc_name = make_cfunc_name(inlines, name, lineno)
params = [] if $1 == 'cconst'
inlines[cfunc_name] = [lineno, code, params, func_name]
argc -= 1
when 'cinit'
text = inline_text argc, prev_insn
func_name = nil
inlines[inlines.size] = [nil, [lineno, text, nil, nil]]
argc -= 1
end
end
if bs[func_name] &&
bs[func_name] != [argc, cfunc_name]
raise "same builtin function \"#{func_name}\", but different arity (was #{bs[func_name]} but #{argc})"
end
bs[func_name] = [argc, cfunc_name] if func_name
end
else
insn[1..-1].each{|op|
if op.is_a?(Array) && op[0] == "YARVInstructionSequence/SimpleDataFormat"
collect_builtin base, op, name, bs, inlines
end
}
end
prev_insn = insn
}
end
# ruby mk_builtin_loader.rb TARGET_FILE.rb
# #=> generate TARGET_FILE.rbinc
#
def mk_builtin_header file
base = File.basename(file, '.rb')
ofile = "#{file}inc"
# bs = { func_name => argc }
collect_builtin(base, RubyVM::InstructionSequence.compile_file(file, false).to_a, 'top', bs = {}, inlines = {})
begin
f = open(ofile, 'w')
rescue Errno::EACCES
# Fall back to the current directory
f = open(File.basename(ofile), 'w')
end
begin
f.puts "// -*- c -*-"
f.puts "// DO NOT MODIFY THIS FILE DIRECTLY."
f.puts "// auto-generated file"
f.puts "// by #{__FILE__}"
f.puts "// with #{file}"
f.puts
lineno = 6
line_file = file.gsub('\\', '/')
inlines.each{|cfunc_name, (body_lineno, text, params, func_name)|
if String === cfunc_name
f.puts "static VALUE #{cfunc_name}(rb_execution_context_t *ec, const VALUE self) {"
lineno += 1
params.reverse_each.with_index{|param, i|
next unless Symbol === param
f.puts "MAYBE_UNUSED(const VALUE) #{param} = rb_vm_lvar(ec, #{-3 - i});"
lineno += 1
}
f.puts "#line #{body_lineno} \"#{line_file}\""
lineno += 1
f.puts text
lineno += text.count("\n") + 1
f.puts "#line #{lineno + 2} \"#{ofile}\"" # TODO: restore line number.
f.puts "}"
lineno += 2
else
# cinit!
f.puts "#line #{body_lineno} \"#{line_file}\""
lineno += 1
f.puts text
lineno += text.count("\n") + 1
f.puts "#line #{lineno + 2} \"#{ofile}\"" # TODO: restore line number.
lineno += 1
end
}
f.puts "static void load_#{base}(void)"
f.puts "{"
table = "#{base}_table"
f.puts " // table definition"
f.puts " static const struct rb_builtin_function #{table}[] = {"
bs.each.with_index{|(func, (argc, cfunc_name)), i|
f.puts " RB_BUILTIN_FUNCTION(#{i}, #{func}, #{cfunc_name}, #{argc}),"
}
f.puts " RB_BUILTIN_FUNCTION(-1, NULL, NULL, 0),"
f.puts " };"
f.puts
f.puts " // arity_check"
f.puts "COMPILER_WARNING_PUSH"
f.puts "#if GCC_VERSION_SINCE(5, 1, 0) || __clang__"
f.puts "COMPILER_WARNING_ERROR(-Wincompatible-pointer-types)"
f.puts "#endif"
bs.each{|func, (argc, cfunc_name)|
f.puts " if (0) rb_builtin_function_check_arity#{argc}(#{cfunc_name});"
}
f.puts "COMPILER_WARNING_POP"
f.puts
f.puts " // load"
f.puts " rb_load_with_builtin_functions(#{base.dump}, #{table});"
f.puts "}"
ensure
f.close
end
end
ARGV.each{|file|
# feature.rb => load_feature.inc
mk_builtin_header file
}
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