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In gcc, use -ggdb -O0 to turn on debu g symbols optimized for the gdb GNU de bugger. Without debug symbols, you can only see the addresses of the functions called, not the actual names or line numbers. You should have built your C or C++ program with debug symbols on, in order to see useful information in your core file. I have to manually delete old ones for new ones to be created.
#Meld diff viewer ubuntu 18.04 code
I tested all of my code and examples here, and they work for me. UPDATE: wait, where are the core files again? That's it! Now, run your program and if it crashes and does a "core dump" it will dump the core as a core file into the same directory you were in when you called the executable.
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Note that I think this only applies to the one terminal you run this in, and I do not think it's persistent across reboots, so you have to run this each time you want core files to be created, and in each terminal you want it to work in: # set max core dump file size to unlimited So, set the allowed core file size to unlimited, as shown below.
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Ulimit -help shows the meaning of -c: -c the maximum size of core files created On Ubuntu 20.04 for me, mine returns 0, which means no core file can be created. Enable core filesįirst off, run ulimit -c to see what the max allowed size is for core files on your system.
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