evanphx

log_format json '{'
  '"host": "lb01", '
  '"status": "$status", '
  '"scheme": "$scheme", '
  '"uri": "$request_uri", '
  '"args": "$args", '
  '"dest_host": "$http_host", '
  '"content_type": "$sent_http_content_type", '
  '"protocol": "$server_protocol", '
  '"referer": "$http_referer", '

evanphx

// Given

struct StackFrame {
    VALUE* locals
}

N = local wanted

$1 = load getelementptr %struct.StackFrame, *%struct.StackFrame, 0, 0, N

evanphx

Laying in bed completely still, imagine yourself laying on the beach.

Feel yourself sunk slightly into the warm sand.

Feel the hot sun warming your body slightly, then a cool breeze wafts over you.

Hear the ocean just over the rise, the waves breaking on the beach.

Feel yourself sink into the sand a little more. As you do, feel your feet relax.

evanphx

package main

import (
	"fmt"
	"os"
	"runtime/pprof"
)

func main() {
	f, err := os.Create("test.pprof")

evanphx

def foo(a : String) 
  # the method prologue is injected with
  raise TypeError unless String === a
end

# Allows for other interesting ones, like:

def use_as_number(a : /\d+/)
  
end

evanphx

package main

import (
	"fmt"
	"os"
	"syscall"
)

const path = "/home/vagrant/blah"

evanphx

num_threads = (ARGV[0] || 2).to_i
num_iterations = (ARGV[1] || num_threads).to_i

def url_helpers
  Module.new do
    class << self
      # This line changes everything. It causes the GIL to switch to another
      # thread. That other thread mutates the CREF that is accidentally shared
      # between these independent sclass scopes, causing the def below to add
      # the method on an entirely different sclass.

evanphx

irb(main):003:0> require 'socket'
=> true
irb(main):004:0> s = TCPServer.new 9999
=> #<TCPServer:fd 10>
irb(main):005:0> Thread.new { s.accept }
=> #<Thread:0x007fedf33f0e88 run>
irb(main):006:0> c = TCPSocket.new "0.0.0.0", 9999
=> #<TCPSocket:fd 11>
irb(main):007:0> Process.fork { p $$ }
on_fork: Detected open IO at fork: #<TCPServer:0x007fedf33e8f08>

evanphx

require 'benchmark'
require 'benchmark/ips'
 
outer_b = 0
Benchmark.ips do |x|
  outer_a = 0
  x.report "inner a block" do
    inner_a = 1
  end

evanphx

type A interface {
  Foo() int
}

type B interface {
  Foo() int
}

type D interface {
  Report(a A)