TDC2016SP - Trilha Linux Embarcado

COPYRIGHT 2016 – Fundação CERTI

C++ and Embedded Linux: a perfect matchVinicius Zein | Fundação CERTI


https://br.linkedin.com/in/viniciuszein

Vinicius Tadeu Zein R&D Coordinator @CERTI Foundation

•  Responsible for the Embedded Systems team

•  More than 10 years developing Embedded Systems

•  In companies like Atmel, LG Electronics and CERTI


R&D Institute

Founded in 1984 with the mission to develop technology solutions for products and processes

500 employees

Private, but results are reinvested in R&D

MCTI and SUFRAMA accredited – projects with “Lei de Informática”, “Lei do Bem” and Embrapii

More than 500 clients around the world


The information in this presentation was compiled from sources believed to be reliable for informational purposes only.Content includes opinions, presentations, articles, hyperlinks or other third party content (“Third Party Material”) that is not intended to, nor constitutes an endorsement by CERTI of the author or the Third Party Materials. The content and views within the Third Party Material are solely those of the third party and do not reflect the opinions of CERTI.The opinions expressed in this presentation and on the following slides are solely those of thepresenter and not necessarily those of CERTI. CERTI does not guarantee the accuracy orreliability of the information provided herein.

.Disclaimer


SU MMARY

CHAPTER 1

Embedded Linux

CHAPTER 2

C++

CHAPTER 3

Development tools and debugging

CHAPTER 4

Test frameworks

CHAPTER 5

Test driven development

CHAPTER 6

Final considerations


Embedded Linux

Chapter 1


CAPÍTULO 1 | LINUX EMBARCADO


Telephone exchanges

IP Phones and Smartphones

TVs and Set-top boxes

Printers

Electronic Control Units for cars

Cameras

Android systems

CHAPTER 1 | EMBEDDED LINUX

-à Se for muito importante esta imagem,

substituir por uma de maior qualidade


C++CHAPTER 2


C++ “cee plus plus”

CHAPTER 2 Multi-paradigm

Object oriented

Templates, inline functions

Metaprogramming

High-performative and powerfull

Lots of tools

Compatibility with C - just in case ;)

STL, Boost, ACE

Evolving language

CHAPTER 2 | C++

C++85 style "C with Classes”, C++98, C++03, C++11, C++14, C++17


Don’t lower your level of abstractionwithout a good reason! Lo

w-l

evel

impl

ies

Mo

re c

od

eM

ore

bug

sH

ighe

r m

aint

enan

ce c

ost

s


Embedded Linux

C++

Perfect match

CHAPTER 2 | C++


DEVELOPMENT TOOLS AND DEBUGGING

CHAPTER 3


CHAPTER 3 | DEVELOPMENT TOOLS AND DEBUGGING

“Making Embedded Linux EasyBuildroot is a simple, efficient

and easy-to-use tool to generate embedded Linux systems through

cross-compilation.”

Build systems > Buildroot



Build systems > Yocto Project

“It's not an embedded Linux distribution

– it creates a custom one for you”



Build systems > Autoconf

Rake

Boost.Build

Qmake

Scons

CMake


Sublime Text 2 QtCreator

JetBrains AppCode


IDEs * Code edition and navigation

VimEmacs

Sublime Text 2 Eclipse CDT

NetbeansSlickEdit

QtCreatorJetBrains AppCode

If debugging is the process of removing bugs, then programming must be the process of putting them in

Edsger Dijkstra



Debugging

LogsCommand Line Interface (CLI)gdb (post morten)gdb + gdbserverdddGoogle BreakPad

For each bug found, a new unit test.


CAPÍTULO 3 | FERRAMENTAS DESENVOLVIMENTO E DEBUGGING

Debugging > GDB

Post mortengdb <program> -c <core_file>

bt full -> backtraceprint <variable>

frame <frame_id>thread <thread_id>






Debugging > Breakpad


Debugging > Breakpad



Continuos integration



Other tools > Static annalysis coverity, cppcheck

Coverage– ccccValgrind, tcmalloc




Code coverage



Test frameworks for C++

CHAPTER 4


CHAPTER 4 | TEST FRAMEWORKS FOR C++

Unit tests – gtest > Well documented

MultiplatformLinux, Windows, Mac OS X

Easy to use, easy to configure

1 execution > multiple failures

COPYRIGHT 2016 – Fundação CERTI Unit tests – gtest






gmock > Google Mocking Framework for tests in C++

Real targets are not always available

Simulating behavior

Creating emulators


COPYRIGHT 2016 – Fundação CERTI gmock






Google Benchmark

https://github.com/google/benchmark

Function benchmarking


COPYRIGHT 2016 – Fundação CERTI Google Benchmark

Test driven development

CHAPTER 5


CHAPTER 5 | TEST DRIVEN DEVELOPMENT

Final considerationsCHAPTER 6


Use smart pointers

std::shared_ptr,std::scoped_ptr,std::unique_ptr


RAIIRAII


CAPÍTULO 6 | Final considerations

RAII

RAIIResource Acquisition Is Initialization


Use a code standardh#p://www.chromium.org/developers/coding-styleh#p://google-styleguide.googlecode.com/svn/trunk/cppguide.xmlh#p://clang.llvm.org/docs/ClangFormat.html


Unit test firstThen code

>TDD


Prefere

STL/Boost

algorithms


?


Thanks!Vinicius Zein [email protected]


ReferencesSlide 6 h#p://events.linuxfounda?on.org/sites/events/files/slides/csimmonds-embedded-linux-?meline-2013.pdf

Slide 11 h#p://ecn.channel9.msdn.com/events/GoingNa?ve12/GN12Cpp11Style.pdf

Slides 24, 25 and 26 h#ps://code.google.com/p/google-breakpad/wiki/GeJngStartedWithBreakpad

Slide 48 h#p://www.pathfindersolns.com/

Education

TDC2016SP - Trilha Linux Embarcado