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require 'json'
require 'thor'
require "heapy/version"
module Heapy
class CLI < Thor
def self.exit_on_failure?
true
end
desc "read <file> <generation> --lines <number_of_lines>", "Read heap dump file"
long_desc <<-DESC
When run with only a file input, it will output the generation and count pairs:
$ heapy read tmp/2015-09-30-heap.dump\x5
Generation: nil object count: 209191\x5
Generation: 14 object count: 407\x5
Generation: 15 object count: 638\x5
Generation: 16 object count: 748\x5
Generation: 17 object count: 1023\x5
Generation: 18 object count: 805\x5
When run with a file and a number it will output detailed information for that\x5
generation:\x5
$ heapy read tmp/2015-09-30-heap.dump 17\x5
Analyzing Heap (Generation: 17)\x5
-------------------------------\x5
allocated by memory (44061517) (in bytes)\x5
==============================\x5
39908512 /app/vendor/ruby-2.2.3/lib/ruby/2.2.0/timeout.rb:79\x5
1284993 /app/vendor/ruby-2.2.3/lib/ruby/2.2.0/openssl/buffering.rb:182\x5
201068 /app/vendor/bundle/ruby/2.2.0/gems/json-1.8.3/lib/json/common.rb:223\x5
189272 /app/vendor/bundle/ruby/2.2.0/gems/newrelic_rpm-3.13.2.302/lib/new_relic/agent/stats_engine/stats_hash.rb:39\x5
172531 /app/vendor/ruby-2.2.3/lib/ruby/2.2.0/net/http/header.rb:172\x5
92200 /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131\x5
DESC
option :lines, required: false, :type => :numeric
def read(file_name, generation = nil)
if generation
Analyzer.new(file_name).drill_down(generation, options[:lines] || 50)
else
Analyzer.new(file_name).analyze
end
end
long_desc <<-DESC
Run with two inputs to output the values of today.dump that are not present in yesterday.dump
$ heapy diff tmp/yesterday.dump tmp/today.dump\x5
Run with three inputs to show the diff between the first two, but only if the objects are still retained in the third
$ heapy diff tmp/yesterday.dump tmp/today_morning.dump tmp/today_afternoon.dump\x5
Pass in the name of an output file and the objects present in today.dump that aren't in yesterday.dump will be written to that file
$ heapy diff tmp/yesterday.dump tmp/today.dump --output_diff=output.json\x5
DESC
desc "diff <before_file> <after_file> <retained_file (optional)> --output_diff=output.json", "Diffs 2 heap dumps"
option :output_diff, required: false, :type => :string
def diff(before, after, retained = nil)
Diff.new(before: before, after: after, retained: retained, output_diff: options[:output_diff] || nil).call
end
map %w[--version -v] => :version
desc "version", "Show heapy version"
def version
puts Heapy::VERSION
end
desc "wat", "Outputs instructions on how to make a manual heap dump"
def wat
puts <<-HELP
To get a heap dump do this:
require 'objspace'
ObjectSpace.trace_object_allocations_start
# Your code here
p ObjectSpace.dump_all
# => #<File:/path/to/output/heap/dump/here.json>
This will print the file name of your heap dump.
If you prefer you can manually pass in an IO object to `ObjectSpace.dump_all`
io = File.open("/tmp/my_dump.json", "w+")
ObjectSpace.dump_all(output: io);
io.close
HELP
end
end
end
require 'heapy/analyzer'
require 'heapy/diff'
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