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 - ellisog.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30438-dbd0fb03e8) Lines: 1028 1039 98.9 % Date: 2025-08-03 09:23:43 Functions: 89 89 100.0 % Legend: Lines: hit not hit

Function Name	Hit count
contrib_full_tors	14
ellnf_prime_degree_hard	49
non_two_torsion_ordinate_char2	49
ellisogenyapply	70
derivhasse	98
ellnf_modpoly	105
ellnf_goodl_l	112
ellnf_isomat	112
ellnf_prime_degree	112
ellnf_prime_degree_easy	112
ellisograph_dummy	154
ellQ_goodl_l	182
isog_identity	252
invisogeny_a4a6	280
isogeny_a4a6	280
corr	336
elkies98	336
isogeny_from_kernel_point	427
divy	476
update_isogeny_polys	532
isomat_perm	539
twistisogeny	616
ellnf_isocrv	644
isomatdbl	714
mkisomatdbl	714
non_two_torsion_abscissa	812
ellisweierstrasspoint	903
ellisogeny	1134
non_two_torsion_ordinate_char_not2	1365
ellcompisog	1379
isog_abscissa	1414
isog_ordinate	1414
ellnfcompisog	1834
get_isog_vars	1876
QXQH_eval	1904
ellisog_by_j	1918
ellisog_by_jt	2072
ellisotree	2184
ellweilcurve	2191
path_to_manin	2198
shortest_path	2198
idealgen_minpoly	2226
stariter_hard	2226
stariter_easy	2240
ellQ_goodl	2464
mkisomat	2506
ellQ_exceptional_iso	2618
ellQ_isomat	2618
list_to_crv	2835
ellisomat	2933
ellisograph_p	3178
fill_LM	3276
ellisograph_r	3451
nfispower_quo	3654
get_polmodular	4102
_degree	4116
ellisograph_a4a6	4165
isomat_find	4340
get_isomat	4382
ellisograph_iso	4550
to_RgX	4760
RgH_eval	5488
distmat_pow	5894
etree_distmat	5894
etree_list	5894
nfmkisomat	5894
ellnf_charpoly	6188
isograph_p	6454
stariter	6468
contrib_weierstrass_pt	7980
startor	8414
RgXY_eval	9590
ellisog_by_roots	10766
ellisog_by_Kohel	10934
trivial_isogeny	11788
to_crv	11872
isogeny_from_kernel_poly	12215
two_torsion_part	12215
first_three_power_sums	12222
make_velu_curve	12586
ellisograph_Kohel_r	14588
a4a6_divpol	15533
ellisograph_Kohel_iso	15533
etree_distmatr	16919
etree_listr	16919
starlaw	18634
isomat_eq	22134
etree_nbnodes	43988
ellmaninconstant	457450

Generated by: LCOV version 1.16