Tools/Scripts/stackcollapse-sampling-profiler-output

#!/usr/bin/env ruby
# Copyright (C) 2023 Apple Inc. All rights reserved.
#
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#    notice, this list of conditions and the following disclaimer.
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require 'rubygems'

begin
    require 'json'
rescue LoadError
    $stderr.puts "Error: some required gems are not installed!"
    $stderr.puts
    $stderr.puts "Try running:"
    $stderr.puts
    $stderr.puts "sudo gem install json"
    exit 1
end

def dump(database)
  database["traces"].each do |stackTrace|
    next if stackTrace["frames"].empty?
    line = stackTrace["frames"].reverse.map do |frame|
        hash, category, offset = frame["location"].split(":")
        "#{frame["name"]}#{hash}".gsub(/;/, '_').gsub(/[\n\r]/, ' ')
    end.join(';')
    puts "#{line} 1"
  end
end

def main
    json = nil
    if ARGV.empty?
        json = JSON.parse(STDIN.read)
    else
        json = JSON::parse(IO::read(ARGV[0]))
    end
    dump(json)
end

main