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 - arith2.c (source / functions) Coverage Total Hit Test: PARI/GP v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 93.9 % 558 524 Test Date: 2026-07-23 17:04:59 Functions: 93.4 % 76 71 Legend: Lines:     hit not hit

Function Name	Hit count
core2fa	0
core2partial	0
corefa	0
corepartial	0
fuse_Z_factor	0
is_nf_extfactor	14
coredisc0	56
corediscs	56
boundfact	84
coredisc2	84
divisorsu_fact_factored	357
check_arith_pos	630
numdiv_aux	760
divisors0	784
numdivu	815
omegau	815
bigomegau	842
sumdiv_aux	1474
sumdivk_aux	1506
fa_clean_u	1540
bigomega	1589
numdiv	1589
omega	1589
cmpu1	1750
Z_issquarefree	2214
Z_issquarefree_fact	2814
uissquarefree_fact	2989
sumdiv	3017
core0	3101
set_fact	3885
issquarefree	6392
coredisc2u_fact	7273
factor_pn_1	7490
factor_pn_1_limit	7490
sumdivk	7987
coredisc	8715
_mod4	8799
usumdivk_fact	9792
divisors_factored	12453
is_Z_factornon0	14462
factorlim	16471
cmpi1	16646
euler_sumdiv	18679
Z_lsmoothen	19467
RgV_is_ZVnon0	22868
fa_clean	24171
divisorsu_moebius	25109
clean_Z_factor	26474
usumdiv_fact	43641
core2	57798
core2_i	57882
arith_n	62173
u_euler_sumdiv	71628
Z_smoothen	82270
factoru_pow	141632
eulerphi	150920
divisorsu	162819
coredisc2_fact	181603
eulerphiu	224032
is_nf_factor	273812
RgV_is_prV	324002
divisors	354080
set_fact_check	362690
divisors_init	366582
ndiv	366869
eulerphiu_fact	635694
RgV_is_ZV0	707973
is_Z_factor	707973
uissquarefree	2530305
check_arith_non0	2743652
check_arith_all	2903762
is_Z_factorpos	7817674
is_Z_factor_i	8540109
RgV_is_ZVpos	16423716
divisorsu_fact	45858806
numdivu_fact	45862505

Generated by: LCOV version 2.0-1