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 - halfgcd.c (source / functions) Hit Total Coverage
Test: PARI/GP v2.18.1 lcov report (development 30702-bddb8d6928) Lines: 215 219 98.2 %
Date: 2026-02-23 02:23:56 Functions: 20 20 100.0 %
Legend: Lines: hit not hit

Function Name Sort by function name Hit count Sort by hit count
FIXUP0 129452
FIXUP1 182593
HGCD 13589882
HGCD0 26470836
HGCD_basecase 13472395
HGCD_split 117487
ZM2_mul 6384731
ZM2_sqr 2004
ZM_inv2 5184149
halfgcdii 5183801
isint2n 21193897
lastq 1408
magic_threshold 21128255
matid2 884
mulT 7734
mulq 2634722
mulqab 68
mulqi 1408
signdet 5366742
uexpi 21193897

Generated by: LCOV version 1.16