Qt Application – Memory Errors

A simply program was created that containing a single main() function with a QApplication instance, a single shot timer to force the program to quit and a call to the Qt event processing executive.  This simply program also had the same memory issues, so this is some sort of issue with Qt, and probably explains why the External Errors are disabled by default in the Analyzer.

The valgrind utility has an option to disable (suppress) errors from being reported.  The ‑‑gen‑suppressions=all option can be used to generate a list of errors to suppress.  These error suppressions (extracted from the output - between the sets of braces) were put into the ibcp.supp file in the test sub-directory.  The memory test script was modified with the ‑‑suppression=$dir/ibcp.supp option where $dir is set to the test sub-directory in the source directory within the script.

This error suppression file can also be added to the Analyzer in QtCreator by going to Options... in the Tools menu and going to the Analyzer options page.  In the Memory Analysis Options section, the Add... button is used to select the ibcp.supp file.  (Note: this is only for running on Linux.)

The commented static linking commands in the CMake file were removed.  Since the executable is now going to require two Qt library files, there is no longer any reason to link the MinGW libraries required by the executable statically.  All the required dynamic link libraries will be included in future releases of the binary zip file for Windows.  If I read the licensing correctly, this is permitted if the libraries were not built from custom source.

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