92 lines
2.7 KiB
Ruby
92 lines
2.7 KiB
Ruby
module YJIT
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def self.disasm(iseq)
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iseq = RubyVM::InstructionSequence.of(iseq)
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blocks = YJIT.blocks_for(iseq)
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return if blocks.empty?
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str = ""
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cs = YJIT::Disasm.new
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str << iseq.disasm
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str << "\n"
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# Sort the blocks by increasing addresses
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blocks.sort_by(&:address).each_with_index do |block, i|
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str << "== BLOCK #{i+1}/#{blocks.length}: #{block.code.length} BYTES, ISEQ RANGE [#{block.iseq_start_index},#{block.iseq_end_index}) ".ljust(80, "=")
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str << "\n"
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cs.disasm(block.code, block.address).each do |i|
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str << sprintf(
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" %<address>08x: %<instruction>s\t%<details>s\n",
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address: i.address,
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instruction: i.mnemonic,
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details: i.op_str
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)
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end
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end
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block_sizes = blocks.map { |block| block.code.length }
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total_bytes = block_sizes.reduce(0, :+)
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str << "\n"
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str << "Total code size: #{total_bytes} bytes"
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str << "\n"
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str
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end if defined?(Disasm)
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# Return a hash for statistics generated for the --yjit-stats command line option.
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# Return nil when option is not passed or unavailable.
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def self.runtime_stats
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# defined in yjit_iface.c
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Primitive.get_stat_counters
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end
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# Discard statistics collected for --yjit-stats.
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def self.reset_stats!
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# defined in yjit_iface.c
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Primitive.reset_stats_bang
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end
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class << self
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private
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# Format and print out counters
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def _print_stats
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counters = runtime_stats
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return unless counters
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$stderr.puts("***YJIT: Printing runtime counters from yjit.rb***")
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print_counters(counters, prefix: 'oswb_', prompt: 'opt_send_without_block exit reasons: ')
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print_counters(counters, prefix: 'leave_', prompt: 'leave exit reasons: ')
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print_counters(counters, prefix: 'getivar_', prompt: 'getinstancevariable exit reasons:')
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print_counters(counters, prefix: 'oaref_', prompt: 'opt_aref exit reasons: ')
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end
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def print_counters(counters, prefix:, prompt:)
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$stderr.puts(prompt)
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counters = counters.filter { |key, _| key.start_with?(prefix) }
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counters.filter! { |_, value| value != 0 }
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counters.transform_keys! { |key| key.to_s.delete_prefix(prefix) }
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if counters.empty?
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$stderr.puts(" (all relevant counters are zero)")
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return
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end
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counters = counters.to_a
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counters.sort_by! { |(_, counter_value)| counter_value }
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longest_name_length = counters.max_by { |(name, _)| name.length }.first.length
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total = counters.sum { |(_, counter_value)| counter_value }
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counters.reverse_each do |(name, value)|
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percentage = value.fdiv(total) * 100
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$stderr.printf(" %*s %10d (%4.1f%%)\n", longest_name_length, name, value, percentage);
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end
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end
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end
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end
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