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) Coverage Total Hit
Test: PARI/GP v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 98.2 % 219 215
Test Date: 2026-07-23 17:04:59 Functions: 100.0 % 20 20
Legend: Lines:     hit not hit

Function Name Sort by function name Hit count Sort by function hit count
mulqab 80
matid2 960
lastq 1461
mulqi 1461
ZM2_sqr 2338
mulT 8226
HGCD_split 128784
FIXUP0 135660
FIXUP1 197119
mulq 4846487
halfgcdii 7427972
ZM_inv2 7428380
ZM2_mul 7531356
signdet 7625499
HGCD_basecase 16867329
HGCD 16996113
magic_threshold 25593226
isint2n 25662113
uexpi 25662113
HGCD0 32143545

Generated by: LCOV version 2.0-1