49 lines
1.3 KiB
ReStructuredText
49 lines
1.3 KiB
ReStructuredText
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.. _lcov_code_coverage:
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Code coverage with lcov
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=======================
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Prerequisites
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-------------
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The Linux gcov and lcov tools are fussy about gcc / g++ compiler
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versions. As of this writing, Ubuntu 18.04 gcov / lcov work with these
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toolchain versions:
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$ gcc –version gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0 $ g++ –version
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g++ (Ubuntu 8.3.0-6ubuntu1~18.04.1) 8.3.0
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Refer to
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https://askubuntu.com/questions/26498/how-to-choose-the-default-gcc-and-g-version
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for information on how to install multiple gcc / g++ versions, and
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switch between them.
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You’ll need to install the following additional packages:
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$ sudo apt-get install gcovr ggcov lcov
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Compile an instrumented vpp image
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---------------------------------
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Two ways:
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$ cd $ make test-gcov $ ## interrupt compilation after building the
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image
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or $ cd /build-root $ make PLATFORM=vpp TAG=vpp_gcov vpp-install
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Initialize the lcov database
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----------------------------
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$ cd $ ./extras/lcov/lcov_prep $ make test-gcov or make TEST=my_test
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test-gcov $ # repeat or vary as desired to increase reported coverage $
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# Generate the report: $ ./extras/lcov/lcov_post
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You can run vpp manually, do anything you like. Results are cumulative
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until you re-run the “prep” script.
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Look at the results
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-------------------
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Point a browser at file:////build-root/html/index.html
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