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:

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/none Coverage Total Hit
Test: PARI/GP v2.18.1 lcov report (development 31041-bd73e9fcdd) Lines: 95.3 % 3697 3524
Test Date: 2026-07-22 22:45:42 Functions: 93.4 % 440 411
Legend: Rating: low: < 75 % medium: >= 75 % high: >= 90 %

File Sort by file name Line Coverage Sort by line coverage Function Coverage Sort by function coverage
Rate Total Hit Rate Total Hit
add.c
100.0%
100.0 % 187 187 100.0 % 10 10
addll.h
100.0%
100.0 % 16 16 100.0 % 4 4
bfffo.h
100.0%
100.0 % 8 8 100.0 % 1 1
cmp.c
95.8%95.8%
95.8 % 71 68 100.0 % 7 7
divll.h
100.0%
100.0 % 34 34 100.0 % 1 1
divll_pre.h
100.0%
100.0 % 48 48 100.0 % 5 5
gcd.c
100.0%
100.0 % 66 66 100.0 % 4 4
gcdext.c
97.6%97.6%
97.6 % 125 122 100.0 % 4 4
gcdll.c
99.4%99.4%
99.4 % 340 338 100.0 % 14 14
halfgcd.c
98.2%98.2%
98.2 % 219 215 100.0 % 20 20
invmod.c
98.0%98.0%
98.0 % 51 50 100.0 % 2 2
level1.h
88.5%88.5%
88.5 % 684 605 89.6 % 241 216
mp.c
96.6%96.6%
96.6 % 1153 1114 97.1 % 70 68
mp_indep.c
94.3%94.3%
94.3 % 562 530 96.2 % 52 50
mulll.h
100.0%
100.0 % 25 25 100.0 % 2 2
ratlift.c
90.7%90.7%
90.7 % 108 98 100.0 % 3 3

Generated by: LCOV version 2.0-1