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Asked: 2026-06-14T11:06:19+00:00

I was trying to do code coverage on a simple hello world program in

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I was trying to do code coverage on a simple hello world program in C++.
The target device is an arm processor and hence I am using GNU ARM toolchain.

arm-elf-gcc -mcpu=arm7tdmi -O2 -g -c main.c -o main.exe creates a .gcno file but fails to create a .gcda file which is needed by gcov to find out the code coverage.

Normally when I run g++/gcc -fprofile-arcs -ftest-coverage .cpp,it first creates a .gcno file and an .exe. After running the a.exe , it generates the .gcda file.

Here when I try to run the main.exe to generate the .gcda, it throws an error – Program too big to fit in memory.
How do I resolve this issue?
Am I going wrong somehere?

Thanks,
A-J

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1 Answer

  1. Editorial Team

    Obviously, you have to run your executable on the target device. The target device must have a filesystem. Upon exit, the executable writes coverage information using ordinary POSIX functions – open, fcntl, write, close, etc. Look at gcov-io.c in GCC sources. Make sure you can successfully link libgcov.a into your executable, that you have write permission on the target device, etc.

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