benweint

[ben@ruby-build-box-3 ~]$ cat gdb.txt 

Thread 5 (Thread 0x7f32595a4700 (LWP 12251)):
#0  0x00007f32611de5bc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000637b95 in wait (this=0x210bb20, state=0x7f32595a3dc0) at /tmp/ruby-build.20140805092211.19382/rubinius-2.2.10/vm/util/thread.hpp:431
#2  rubinius::SignalHandler::perform (this=0x210bb20, state=0x7f32595a3dc0) at vm/signal.cpp:184
#3  0x0000000000637e1c in rubinius::signal_handler_tramp (state=<value optimized out>) at vm/signal.cpp:47
#4  0x00000000006c7842 in rubinius::Thread::in_new_thread (ptr=0x210bd70) at vm/builtin/thread.cpp:259
#5  0x00007f32611da9d1 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f3260787b5d in clone () from /lib64/libc.so.6

benweint

#!/usr/bin/env ruby

require 'socket'
require 'resolv'
require 'resolv-replace'

puts "Run this to trace getaddrinfo calls:"
puts "sudo dtrace -p #{$$} -n 'pid$target::getaddrinfo:entry { ustack(); }'"

loop do

benweint

#!/usr/bin/env ruby

require 'newrelic_rpm'

def do_something
  puts 'working!'
  sleep(3)
end

include ::NewRelic::Agent::Instrumentation::ControllerInstrumentation

benweint

#!/usr/bin/env ruby

require 'thread'
require 'rubygems'
require 'monitor'

class Dummy
  include MonitorMixin

  def sync

benweint

#!/usr/bin/env ruby

t0 = Time.now
GC::Profiler.enable

100000.times do
  String.new('a' * 1000)
end

gc_time = GC::Profiler.total_time

benweint

#!/usr/bin/env ruby

puts "Run this in another terminal:"
puts ""
puts "  sudo ./trace-gc-standalone.sh #{$$}"
puts ""
puts "... wait for the 'Ready!' message, switch back here and press enter to start."

GC::Profiler.enable
$stdin.gets

benweint

module A
  def foo
    puts "foo from A"
  end
end

class B
  include A

  def foo

benweint

#!/usr/bin/env ruby

class BadString < String; end

original      = (0..255).to_a.pack("C*").force_encoding("UTF-8")
subclass      = BadString.new(original)
round_tripped = subclass.to_s

puts "encoding:       original = #{original.encoding}, subclass = #{subclass.encoding}, round_tripped = #{round_tripped.encoding}"
puts "valid_encoding? original = #{original.valid_encoding?}, subclass = #{subclass.valid_encoding?}, round_tripped = #{round_tripped.valid_encoding?}"

benweint

#!/usr/bin/env ruby

string = "\n\v"

puts "before racc require: #{Array(string).inspect}"
require 'racc'
puts "after racc require: #{Array(string).inspect}"

benweint

(gdb) t a a bt

Thread 5 (process 11796):
#0  0x00000001003d8e4f in llvm::SelectionDAG::getFrameIndex ()
#1  0x000000010027d55b in (anonymous namespace)::X86DAGToDAGISel::getAddressOperands ()
#2  0x000000010027da18 in (anonymous namespace)::X86DAGToDAGISel::SelectAddr ()
#3  0x000000010027a78c in (anonymous namespace)::X86DAGToDAGISel::CheckComplexPattern ()
#4  0x000000010043994c in llvm::SelectionDAGISel::SelectCodeCommon ()
#5  0x0000000100274536 in (anonymous namespace)::X86DAGToDAGISel::Select ()
#6  0x000000010043bc41 in llvm::SelectionDAGISel::DoInstructionSelection ()