Code coverage tests

This page documents the degree to which the PARI/GP source code is tested by our public test suite, distributed with the source distribution in directory src/test/. This is measured by the gcov utility; we then process gcov output using the lcov frond-end.

We test a few variants depending on Configure flags on the pari.math.u-bordeaux.fr machine (x86_64 architecture), and agregate them in the final report:

• with GMP kernel
• with GMP kernel using --mt=pthread
• with native kernel, including micro-assembler code
• with native kernel, without micro-assembler
• with native kernel, without micro-assembler, disabling GCC extensions (DISABLE_INLINE)
• with GMP kernel, emulating an x86_32 architecture at Configure time via setarch

The target is to exceed 90% coverage for all mathematical modules (given that branches depending on DEBUGLEVEL or DEBUGMEM are not covered). This script is run to produce the results below.

LCOV - code coverage report

Current view: top level - kernel/gmp Coverage Total Hit Test: PARI/GP v2.18.1 lcov report (development 31041-bd73e9fcdd) Lines: 95.8 % 824 789 Test Date: 2026-07-22 22:45:42 Functions: 96.7 % 60 58 Legend: Rating: low: < 75 % medium: >= 75 % high: >= 90 %

File	Line Coverage				Function Coverage
	Rate		Total	Hit	Rate	Total	Hit
mp.c		95.1 %	718	683	96.4 %	56	54
gcd.c		100.0 %	30	30	100.0 %	2	2
gcdext.c		100.0 %	76	76	100.0 %	2	2

Generated by: LCOV version 2.0-1