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 v2.19.0 lcov report (development 31092-e6893b0017) Lines: 98.2 % 219 215
Test Date: 2026-08-12 17:02:34 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 1359
mulqi 1359
ZM2_sqr 2338
mulT 8170
HGCD_split 129601
FIXUP0 136032
FIXUP1 198278
mulq 4944379
halfgcdii 7491579
ZM_inv2 7491987
ZM2_mul 7531674
signdet 7690265
HGCD_basecase 16941445
HGCD 17071046
magic_threshold 25681456
isint2n 25750685
uexpi 25750685
HGCD0 32233409

Generated by: LCOV version 2.0-1