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 - ellsea.c (source / functions) Coverage Total Hit Test: PARI/GP v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 95.2 % 1254 1194 Test Date: 2026-07-23 17:04:59 Functions: 94.7 % 95 90 Legend: Lines:     hit not hit

Function Name	Hit count
FpXQ_elldivpol	0
Fp_elldivpol	0
Zq_divexact	0
Zq_pval	0
Zq_sqrt	0
Fq_ellcard_CM	14
find_CM	14
list_singular_discs	14
vecpoints_to_vecx	14
ellmodulareqn	35
a4a6t_from_J	49
find_isogenous_from_J	49
Fq_polmodular_eval	70
find_trace_lp1_roots	70
get_seadata	91
seadata_filename	91
corr	98
Fq_to_Flx	108
RgXY_deflatex	168
Flxq_find_eigen_Frobenius	336
Flxq_find_eigen_value_power	336
Flxq_elldivpolmod	348
find_eigen_value_oneroot	483
find_trace_one_root	518
Flxq_study_eqn	594
Flxq_elldivpolmod_init	684
Zq_inv	763
separation	903
match_and_sort	959
Fp_ellcard_SEA	973
get_FqE_group	973
champion	1008
get_bound_bsgs	1008
Flxq_rhs	1020
Fq_ellcard_SEA	1057
FqX_homogenous_div	1288
Flxq_elldivpol34	1368
FqX_numer_isog_abscissa	1519
Fq_elldivpol2	1519
Fq_elldivpol2d	1519
find_kernel_power	1519
BSGS_pre	1806
compute_diff	1806
multiple_crt	1806
possible_traces	1806
get_lgatkin	1911
find_isogenous_from_Atkin	2555
Fq_ellj	2576
Zq_ellj	2646
add_atkin	4081
find_trace_Atkin	4676
Fq_elldivpolmod	4809
find_isogenous_from_canonical	4830
find_trace_Elkies_power	5159
Fq_find_eigen_value_power	5586
find_eigen_value_power	5922
Fq_find_eigen_Frobenius	6069
FqX_homogenous_eval	6139
compute_u	6531
ZqXn_WNewton	7070
Zq_Weierstrass	7070
find_isogenous	7441
a4a6t	8820
find_kernel	8869
Fp_study_eqn	8988
list_to_pol	9884
seadata_parse	9884
Fq_study_eqn	9905
find_trace	9919
get_modular_eqn	9919
study_modular_eqn	9919
seadata_cache	9940
Fq_elldivpolmod_init	10530
divpolmod_init	11214
meqn_j	11480
cmp_atkin	17157
rhs	17621
FqX_invlift1	19250
FqX_invsqrtlift1	19250
Fq_elldivpol34	21060
Fq_ellyn	24283
ZqX_integ2Xn	26320
FqX_mulhigh	38500
FqX_mulhigh_i	38500
divpol_ff	86870
Zq_div	97580
Zq_divu_safe	119238
divpol_f2	143465
FqX_shift	163030
set_cost	182469
divpol	185906
value	369607
pari_get_seadata	376653
pari_set_seadata	378548
cost	458990

Generated by: LCOV version 2.0-1