Debugging and Profiling Qt applications on Linux

This training introduces tools to help developers and testers find bugs and performance issues in Linux applications. The tools presented cover a wide range of problems, from general-purpose debugging and CPU profiling to Linux-specific high-level analyzers.

Course Contents:

This training focuses on what a developer should know for being efficient on both desktop as well as embedded Linux.

The following tools will be covered:

Debugging on Linux:

• general purpose debuggers: GDB, RR
• memory error detectors: valgrind’s memcheck, AddressSanitizers
• thread error detectors: ThreadSanitizer
• tracing: ldd, strace
• various Qt-builtin features
• GammaRay to investigate internals of Qt applications
• OpenGL: apitrace

Profiling on Linux:

• CPU: valgrind’s callgrind, Linux perf, Intel VTune Amplifier XE
• heap memory: valgrind’s massif, heaptrack
• QML: QML profiler
• OpenGL: apitrace
• system-wide: LTTng

Testing on Windows and Linux:

• Qt TestLib: unit tests and benchmarks
• static code analysis: clang analyzer, Coverity, Clazy
• code coverage: gcov

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