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 - basemath - QX_factor.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30658-0716cf3506) Lines: 913 954 95.7 % Date: 2026-01-31 09:22:40 Functions: 61 64 95.3 % Legend: Lines: hit not hit

Function Name	Hit count
BD_deg1	0
Rg_is_QXk	0
ZXk_divexact	0
next2pow	14
LLL_cmbf	126
chk_factors	140
QXk_gcd	189
polcyclofactors	315
chk_factors_get	350
BD_odd	406
QX_factor	805
poliscycloprod	1029
LLL_check_progress	1547
myconcat	2310
BD	2359
QX_gcd	19231
_gcd	19420
invphi	19617
ZX_factor	37289
fact_from_DDF	38087
ZX_factor_i	38094
cmbf	50771
cmbf_precs	50771
combine_factors	50771
Beauzamy_bound	61273
Mignotte_bound	61273
factor_bound	61273
poliscyclo	99187
ZX_is_irred	102484
root_bound	111057
ZX_gcd_chinese	117540
ZX_gcd_filter	123695
ZX_DDF	153225
shifteval	184887
ZX_is_squarefree	198325
ZX_DDF_max	206092
ZX_squff	320363
ZXk_gcd	1686070
rec	1714462
nfrootsQ	1876669
DDF_roots	1876670
pick_prime	2082763
ZXkX_ZXk_divexact	2528117
ZXk_divexact_i	2529297
ZXkX_ZXk_divexact_s	2571356
ZXk_divides_i	2789715
ZX_radical	3167834
centeri2n	3214547
ZXkX_ZXk_divides_s	3264990
ZX_gcd_slice	3359386
ZX_gcd_worker	3359386
ZX_gcd_Flx	3371028
ZXk_content_shallow	3445416
dividesii	3481592
ZXk_center2n	4910922
ZXk_renormalize	4961365
ZXk_divides	6218618
ZX_divides	6559124
ZX_divides_i	6588622
ZXk_divexact_s	7584530
ZXk_gcd_i	8689753
ZXk_divides_s	10123525
ZX_gcd	10624155
ZX_gcd_all	14440653

Generated by: LCOV version 1.16