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 30831-19b50a36d0) Lines: 912 954 95.6 % Date: 2026-04-21 09:26:02 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	19354
_gcd	19543
invphi	19741
ZX_factor	37324
fact_from_DDF	38122
ZX_factor_i	38129
cmbf	50778
cmbf_precs	50778
combine_factors	50778
Beauzamy_bound	61279
Mignotte_bound	61279
factor_bound	61279
poliscyclo	99200
ZX_is_irred	102574
root_bound	111904
ZX_gcd_chinese	117513
ZX_gcd_filter	123702
ZX_DDF	153353
shifteval	185453
ZX_is_squarefree	198458
ZX_DDF_max	206242
ZX_squff	320762
ZXk_gcd	1650183
rec	1663476
DDF_roots	1877558
nfrootsQ	1877559
pick_prime	2083799
ZXkX_ZXk_divexact	2499495
ZXkX_ZXk_divexact_s	2515187
ZXk_divexact_i	2523620
ZXk_divides_i	2729793
centeri2n	3134158
ZXkX_ZXk_divides_s	3163143
ZX_radical	3168709
ZXk_content_shallow	3341393
ZX_gcd_slice	3359365
ZX_gcd_worker	3359365
ZX_gcd_Flx	3371046
dividesii	3375763
ZXk_center2n	4782462
ZXk_renormalize	4811447
ZXk_divides	6056731
ZX_divides	6560557
ZX_divides_i	6590062
ZXk_divexact_s	7517211
ZXk_gcd_i	8452874
ZX_gcd	9558683
ZXk_divides_s	9817442
ZX_gcd_all	13376818

Generated by: LCOV version 1.16