Get actual symbol names from a stack trace generated by`strip(1)`ped binary.

fetch_stacktrace_symbols.rb

#!/usr/bin/env ruby

require 'optparse'

def create_symbol_list(binary_path, arch)
  temp = `mktemp -t tmp`
  `nm -arch #{arch} "#{binary_path}" 2>/dev/null \
    | awk '$3 != "" { print $0 }' \
    | sort  \
    > "#{temp}"`
  result = []
  open(temp) { |file|
    file.each.map { |line|
      address, type, func = line.split(" ", 3)
      [address.hex, func.chomp]
    }.each { |params|
      result << params
    }
  }
  return result
end

def find_function(symbol_list, offset)
  last_params = nil
  symbol_list.each { |params|
    address, func = params
    break if offset <= address
    last_params = params
  }
  last_params
end

opts = {
  :binary => nil,
  :arch => "x86_64",
}
OptionParser.new { |parser|
  parser.instance_eval {
    self.banner = <<-EOS.gsub(/^\t+/, "")
Usage: #{$0} [opts] < [input stack trace]
EOS
    separator "Options:"
    on("-i", "--input [BINARY_PATH]", "unstripped binary path") { |input|
      opts[:binary] = input
    }
    on("-arch [ARCH=#{opts[:arch]}]", "target architecture") { |arch|
      opts[:arch] = arch
    }
    parse!(ARGV)
    if opts[:binary].nil? then
      raise OptionParser::MissingArgument, "no '--input' option specified"
    end
  }
}

target_path = opts[:binary]
arch = opts[:arch]
target_dylib = File.basename(target_path)

symbols = create_symbol_list(target_path, arch)

STDIN.read.split("\n").each { |line|
  trace_number, dylib, address, base, plus, offset = line.split(" ")
  if dylib == target_dylib then
    offset = offset.to_i
    address, func = find_function(symbols, offset)
    puts line + " => " + `echo #{func} | c++filt`.chomp + " + 0x" + (offset - address).to_s(16)
  else
    puts line
  end
}