Debugging Native Extensions of Dynamic Languages

Presentation of the paper "Debugging Native Extensions of Dynamic Languages" at ManLang'18.

Check out the screen recording of the demo at https://youtu.be/6znqkxvZhsI

Transcript

1. DEBUGGING NATIVE EXTENSIONS OF DYNAMIC LANGUAGES Jacob Kreindl, Manuel Rigger, Hanspeter Mössenböck 15th International Conference on Managed Languages & Runtimes, September 13, 2018
2. MOTIVATION 13.09.2018 Jacob Kreindl, ManLang’18 2 Native Extensions
3. MOTIVATION 13.09.2018 Jacob Kreindl, ManLang’18 2 Debuggers for Dynamic Languages Native Extensions
4. MOTIVATION 13.09.2018 Jacob Kreindl, ManLang’18 2 Debuggers for Dynamic Languages Native Extensions
5. MOTIVATION 13.09.2018 Jacob Kreindl, ManLang’18 2 Debuggers for Dynamic Languages Debuggers for Native Code Native Extensions
6. MOTIVATION 13.09.2018 Jacob Kreindl, ManLang’18 2 Debuggers for Dynamic Languages Debuggers for Native Code Native Extensions
7. GRAALVM 13.09.2018 Jacob Kreindl, ManLang’18 3 Native Extensions
8. GRAALVM 13.09.2018 Jacob Kreindl, ManLang’18 3 Execute & Debug Native Extensions
9. GRAALVM 13.09.2018 Jacob Kreindl, ManLang’18 3 Execute & Debug Execute Native Extensions
10. GRAALVM 13.09.2018 Jacob Kreindl, ManLang’18 3 & Debug Our Contribution Execute & Debug Execute Native Extensions
11. GRAALVM FOR DYNAMIC LANGUAGES 13.09.2018 Jacob Kreindl, ManLang’18 4
12. GRAALVM FOR DYNAMIC LANGUAGES 13.09.2018 Jacob Kreindl, ManLang’18 4 Language Front-End Language Front-End Language Front-End
13. GRAALVM FOR DYNAMIC LANGUAGES 13.09.2018 Jacob Kreindl, ManLang’18 4 Language Front-End Language Front-End Language Front-End Language-Agnostic Program Representation op1 op2 if else then op3 op4 Source Location
14. GRAALVM FOR DYNAMIC LANGUAGES 13.09.2018 Jacob Kreindl, ManLang’18 4 Debugger Back-End Chrome Debugger Netbeans Debugger Other Front-Ends Language Front-End Language Front-End Language Front-End Language-Agnostic Program Representation op1 op2 if else then op3 op4 Source Location
15. GRAALVM FOR NATIVE EXTENSIONS 13.09.2018 Jacob Kreindl, ManLang’18 5
16. GRAALVM FOR NATIVE EXTENSIONS 13.09.2018 Jacob Kreindl, ManLang’18 5 LLVM-IR LLVM Front-End (Clang, Dragonegg, …)
17. GRAALVM FOR NATIVE EXTENSIONS 13.09.2018 Jacob Kreindl, ManLang’18 5 LLVM-IR LLVM Front-End (Clang, Dragonegg, …) Sulong Language-Agnostic Program Representation op1 op2 if else then op3 op4 Debugger Back-End
18. OUR CONTRIBUTIONS 13.09.2018 Jacob Kreindl, ManLang’18 6 LLVM-IR Sulong Language-Agnostic Program Representation + Run-Time Debug Information LLVM Front-End (Clang, Dragonegg, …) Debugger Back-End with Debug Information + DI Parser op1 op2 if else then op3 op4 Scope & Location Value Tracking Abstraction to Source-Level
19. Debugging a C-Extension for a Ruby Program DEMO
20. EXAMPLE 13.09.2018 Jacob Kreindl, ManLang’18 8 int fact(int n) { int result = 1; if (n > 0) result = n * fact(n - 1); return result; }
21. EXAMPLE 13.09.2018 Jacob Kreindl, ManLang’18 9 #include "ruby.h" int fact(int n) {…} VALUE callFact(VALUE self, VALUE num) { int n = NUM2INT(num); int result = fact(n); return INT2NUM(result); } void Init_FactExt() { VALUE FactExt = rb_define_module("FactExt"); rb_define_method(FactExt, "fact", &callFact, 1); }
22. EXAMPLE 13.09.2018 Jacob Kreindl, ManLang’18 10 require("./FactExt.su") include FactExt (0..12).each do |n| f = FactExt::fact(n) puts "fact(" + n.to_s + ") = " + f.to_s end
23. Live Demonstration DEMO
24. IN CONCLUSION 13.09.2018 Jacob Kreindl, ManLang’18 12 Execute & Debug Native Extensions
25. IN CONCLUSION  Same Debugger Front-End for all Languages 13.09.2018 Jacob Kreindl, ManLang’18 12 Execute & Debug Native Extensions
26. IN CONCLUSION  Same Debugger Front-End for all Languages  Single Run-Time Environment 13.09.2018 Jacob Kreindl, ManLang’18 12 Execute & Debug Native Extensions
27. IN CONCLUSION  Same Debugger Front-End for all Languages  Single Run-Time Environment  Source-Level Stepping & Breakpoints 13.09.2018 Jacob Kreindl, ManLang’18 12 Execute & Debug Native Extensions
28. IN CONCLUSION  Same Debugger Front-End for all Languages  Single Run-Time Environment  Source-Level Stepping & Breakpoints  Cross-Language Symbol Inspection 13.09.2018 Jacob Kreindl, ManLang’18 12 Execute & Debug Native Extensions
29. JOHANNES KEPLER UNIVERSITY LINZ Altenberger Str. 69 4040 Linz, Austria www.jku.at Thank you for your attention! QUESTIONS? Read the Paper Watch the Demo