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 - polclass.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30604-e5d817ee12) Lines: 825 846 97.5 % Date: 2026-01-08 09:21:40 Functions: 72 73 98.6 % Legend: Lines: hit not hit

Function Name	Hit count
logfac	0
evec_inverse	196
evec_equal	231
orient_pcp	287
evec_compose	518
polclass_psum	560
verify_2path	672
evec_inverse_o	707
distinct_inverses	987
next_prime_evec	1225
index_to_evec	1379
polclass_small_disc	1505
famatsmall_divexact	1971
modinv_inverted_involution	2070
modinv_negated_involution	2070
polclass	2184
check_modinv	2828
verify_edge	3656
modinv_units	3964
evec_n_to_m	4440
evec_orders	4440
classgp_pcp_check_generators	4461
classgp_make_pcp	5001
height_margin	5001
modinv_has_sign_ambiguity	5001
pcp_get_fau	5001
quadnegclassnou	5001
select_classpoly_prime_pool	5001
select_classpoly_primes	5001
upper_bound_on_classpoly_coeffs	5001
evec_clear	5133
next_generator	5613
evec_order	5634
evec_ri_mutate	5634
adjust_orientation	6398
oriented_n_action	6398
polclass0	6506
pcp_get_n	6685
pcp_get_o	6685
pcp_get_orient_reps	6685
pcp_get_r	6685
pcp_get_m	6965
pcp_get_orient_p	6965
pcp_get_orient_q	6965
vecsmall_isin_skip	7610
pcp_get_L	9566
pcp_get_L0	9566
evec_to_index	10726
adjust_signs	10780
pcp_get_k	11686
evec_copy	12529
evec_ri	12978
Flv_powsum_pre	14924
evec_reduce	21377
polclass_roots_modp	147084
pcp_get_u	147181
polclass_worker	147208
best_torsion_constraint	148358
find_jinv	148370
hasse_bounds	148433
find_j_inv_with_given_trace	148537
oneroot_of_classpoly	148776
pcp_get_D	157170
pcp_get_inv	157369
test_curve_order	177673
norm_eqn_set	188795
factor_uv	195358
hclassno_wrapper	200359
pcp_get_D0	200359
pcp_get_h	200359
torsion_constraint	443651
random_FleV	912707
primecmp	1305422

Generated by: LCOV version 1.16