Class: Dwarftree::DebugRangesParser

Inherits:
Object
  • Object
show all
Defined in:
lib/dwarftree/debug_ranges_parser.rb

Constant Summary collapse

CommandError = 
Class.new(StandardError)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse(object) ⇒ Object

Parameters:

  • object (String) 


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# File 'lib/dwarftree/debug_ranges_parser.rb', line 5

def self.parse(object)
  cmd = ['objdump', '--dwarf=Ranges', object]
  debug_ranges = IO.popen(cmd, &:read)
  unless $?.success?
    raise CommandError.new("Failed to run: #{cmd.join(' ')}")
  end
  new.parse(debug_ranges)
end

Instance Method Details

#parse(debug_ranges) ⇒ Hash{ Integer => Array<Range<Integer>> }

Parameters:

  • debug_ranges (String)

Returns:

  • (Hash{ Integer => Array<Range<Integer>> }) 


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# File 'lib/dwarftree/debug_ranges_parser.rb', line 16

def parse(debug_ranges)
  offset_ranges = Hash.new { |h, k| h[k] = [] }
  debug_ranges.scan(/^    \h{8} \h{16} \h{16} $/) do |line|
    offset, range_beg, range_end = line.strip.split(' ')
    offset_ranges[offset.to_i(16)] << (range_beg.to_i(16)..range_end.to_i(16))
  end
  offset_ranges
end