RubyMotion: Under the Hood
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Slides from the talk "RubyMotion: Under the Hood" presented at the Wicked Good Ruby Conference in 2013.
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RubyMotion: Under the Hood
- 1. RubyMotion: Under the Hood Inspired by Click and Clack Monday, October 14, 2013
- 2. A brief introduction Monday, October 14, 2013
- 3. About Me Name: Joshua Ballanco Monday, October 14, 2013
- 4. About Me Employer: Burnside Digital Monday, October 14, 2013
- 5. About Me Location: Ankara, Turkey Monday, October 14, 2013
- 6. A slightly longer introduction Monday, October 14, 2013
- 7. Before... Monday, October 14, 2013
- 8. About Me Employer: Patch Monday, October 14, 2013
- 9. About Me Location: New York City Monday, October 14, 2013
- 10. Before that... Monday, October 14, 2013
- 11. About Me Employer: Apple Monday, October 14, 2013
- 12. About Me Location: Cupertino Monday, October 14, 2013
- 13. Before that... Monday, October 14, 2013
- 14. About Me School: University of Miami Monday, October 14, 2013
- 15. About Me Location: Miami Monday, October 14, 2013
- 16. A bit of history Monday, October 14, 2013
- 17. In graduate school Monday, October 14, 2013
- 18. In graduate school Monday, October 14, 2013
- 19. At Apple... Retail Monday, October 14, 2013
- 20. At Apple Laurent Sansonetti Monday, October 14, 2013
- 21. After Apple... Monday, October 14, 2013
- 22. Episode VI - The Return of The RubyMotion Monday, October 14, 2013
- 23. What is RubyMotion? • Use Ruby to build apps for iOS and OS X • Native apps • Interface directly with Obj-C libraries • CLI-based build system Monday, October 14, 2013
- 24. What is RubyMotion? • RubyMotion: http://www.rubymotion.com/ • MotionCasts: http://motioncasts.tv/ • RubyMotion Wrappers: ! http://rubymotion-wrappers.com/ • ...and lot’s more Monday, October 14, 2013
- 25. What is MacRuby? • Intended to be the implementation of Ruby 2.0 for OS X • Target RubySpec compliance • JIT or AOT Compiled • Uses libauto for Garbage Collection Monday, October 14, 2013
- 26. What is MacRuby? Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 27. Running a “something.rb” file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 28. Running a “something.rb” file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 29. Running a “something.rb” file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 30. AOT compiling “something.rb” Ruby Syntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 31. AOT compiling “something.rb” Ruby Syntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 32. Running an AOT compiled “something.rb” Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 33. Running an AOT compiled “something.rb” Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 34. Running an AOT compiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 35. Running an AOT compiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 36. Running an AOT compiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 37. What is RubyMotion? • Descendent of MacRuby • “Ruby, the Good Parts” • Static Compiled • Retain/release reference counting Monday, October 14, 2013
- 38. Static compiling “something.rb” Ruby Syntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 39. Static compiling “something.rb” Ruby Syntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 40. Running a static compiled “something.rb” VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 41. Running a static compiled “something.rb” VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 42. Why must we statically compile? • On OS X • Compile writes code to a memory page • Runtime runs the code from that memory page Monday, October 14, 2013
- 43. Why must we statically compile? • On iOS Memory pages must be writable or executable, NOT BOTH! • • • Monday, October 14, 2013 • OS prohibits runtime compilation Apple prohibits interpreting arbitrary scripts ...but you wouldn’t want an interpreter anyway
- 44. Garbage Collection Monday, October 14, 2013
- 45. What happened to the Garbage Collector? It required extra threads, so we had to kill it... Monday, October 14, 2013
- 46. So RubyMotion Uses ARC? Yes... Uh...no ...sorta? Monday, October 14, 2013
- 47. ARC vs “ARC” • Objective-C’s ARC modifies your code before compilation • RubyMotion VM knows when retain and/or release should be called...your code is not touched Monday, October 14, 2013
- 48. ARC vs “ARC” Isn’t the distinction rather academic? Probably... Monday, October 14, 2013
- 49. “ARC” Caveats • Collection happens when the autorelease pool drains • Need to be careful with tight loops that generate many objects • Use “autorelease do...end” • Detects almost all cycles • Use WeakRefs if cycles become problematic Monday, October 14, 2013
- 50. Debugging RubyMotion • Remember, RubyMotion objects are Objective-C objects... • All the usual tricks are valid! Monday, October 14, 2013
- 51. Let’s Play! Monday, October 14, 2013
- 52. The Victim app/app_delegate.rb Monday, October 14, 2013
- 53. The Victim app/app_delegate.rb Monday, October 14, 2013
- 54. REPL Magic Monday, October 14, 2013
- 55. REPL Magic Monday, October 14, 2013
- 56. REPL Magic Monday, October 14, 2013
- 57. REPL Magic Monday, October 14, 2013
- 58. That’s cool...but can you do it in a debugger??? Monday, October 14, 2013
- 59. Debugger Wizardry Monday, October 14, 2013
- 60. Debugger Wizardry Monday, October 14, 2013
- 61. Debugger Wizardry Monday, October 14, 2013
- 62. Debugger Wizardry Monday, October 14, 2013
- 63. That’s CRAZY! I know...but it’s fun! Monday, October 14, 2013
- 64. Debugging RubyMotion • Helper methods “pro” and “pri” • http://www.rubymotion.com/developercenter/articles/debugging/ • Watch for more/better tooling to come... Monday, October 14, 2013