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Aaron Patterson tenderlove

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 ​[object Object] :trollface:
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View cross_platform.rb
require "fisk"
require "aarch64"
require "jit_buffer"
require "fiddle"
x86 = Fisk.new
x86.put_label(:foo)
x86.mov(x86.rax, x86.imm(42))
x86.ret
x86.jmp(x86.label(:foo))
View shc-decode.rb
# Smart Health Card decoder
# This decodes the SHC url thing that is stored in smart health card QR codes
str = DATA.readline
require "base64"
require "zlib"
require "json"
require "pp"
View fiddle_hacks.rb
# Fiddle, passing a pointer to an int. This gets the current process command
module Hacks
include Fiddle
func = "_NSGetExecutablePath"
path_ptr = Fiddle::Handle::DEFAULT[func]
path = Function.new path_ptr, [TYPE_VOIDP, TYPE_INTPTR_T], TYPE_INT, name: func
define_singleton_method(func, &path.to_proc)
@tenderlove
tenderlove / ruby_jit.rb
Last active Jan 12, 2022
Use fisk and fiddle to patch a Ruby method at runtime
View ruby_jit.rb
require "fisk"
require "fisk/helpers"
require "fiddle/import"
module Ruby
extend Fiddle::Importer
dlload
typealias "VALUE", "uintptr_t"
View break_dance.rb
# Have you ever wanted lldb to break in a certain place, but you weren't
# sure where to set the breakpoint? Look no further than this script!
#
# This script creates a chunk of executable code that uses the int3 x86
# instruction. This instruction is defined for use by debuggers, and you can
# read more about it here: https://en.wikipedia.org/wiki/INT_%28x86_instruction%29#INT3
#
# When that instruction is executed, the debugger will halt and you can do
# what you need!
#
View thing.rb
require "objspace"
require "json"
def go x
count = GC.stat(:major_gc_count)
loop do
info = JSON.parse(ObjectSpace.dump(x))
break if info["flags"]["old"]
GC.start
end
View profileyarv.rb
#!/usr/bin/env ruby
require 'pp'
files = {'vm.inc' => [], 'insns.def' => []}
current_insn = nil
current_filename = 'vm.inc'
lineno_offset = 0
IO.foreach('vm.inc') do |line|
case line
when /^INSN_ENTRY\((\w+)\)/
@tenderlove
tenderlove / ngpng.rb
Last active Dec 12, 2020
Simple PNG generation example that only depends on zlib in Ruby
View ngpng.rb
# Not Great PNG class. This is a very simple example of writing a PNG. It
# only supports colors from the color palette stored in `@palette`. This is
# meant to be example code, but I am using it in a program for visualizing
# heap dumps from Ruby.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
@tenderlove
tenderlove / out.sh-session
Last active Dec 4, 2020
muck with RbConfig before RubyGems can
View out.sh-session
[aaron@tc-lan-adapter ~]$ cat x.rb
require "rbconfig"
# Change the compiler to "aarons-compiler"
RbConfig::CONFIG["CC"] = "aarons-compiler"
[aaron@tc-lan-adapter ~]$ RUBYOPT='-I/Users/aaron -rx' gem install sqlite3
Building native extensions. This could take a while...
ERROR: Error installing sqlite3:
ERROR: Failed to build gem native extension.
View right_side.stl
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