Segmentation fault (core dumped): how to diagnose and fixing?

SegmentationFault.md

Here the good methodologies to find and fix segmentation fault errors

1. Compile you program using the -g -O0 gcc-switch, or add options to string CFLAGS and/or CXXFLAGS in Makefile.
2. Then use gdb (if need - pass command argument using --args option): gdb --args ./proxmark3 /dev/ttyACM0
3. Use some gdb magic:

(gdb) run
<segfault happens here>
(gdb) backtrace
<offending code is shown here>

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This link list I find useful:

• gnu.org/software/gcc/bugs/segfault.html
• http://www.unknownroad.com/rtfm/gdbtut/gdbtoc.html
• https://stackoverflow.com/questions/3718998/fixing-segmentation-faults-in-c