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 30603-c72b2decfc) Lines: 825 846 97.5 % Date: 2026-01-07 09:21:48 Functions: 72 73 98.6 % Legend: Lines: hit not hit

Function Name	Hit count
Flv_powsum_pre	14924
adjust_orientation	6398
adjust_signs	10780
best_torsion_constraint	148356
check_modinv	2828
classgp_make_pcp	5001
classgp_pcp_check_generators	4461
distinct_inverses	987
evec_clear	5133
evec_compose	518
evec_copy	12529
evec_equal	231
evec_inverse	196
evec_inverse_o	707
evec_n_to_m	4440
evec_order	5634
evec_orders	4440
evec_reduce	21377
evec_ri	12957
evec_ri_mutate	5634
evec_to_index	10726
factor_uv	195358
famatsmall_divexact	1972
find_j_inv_with_given_trace	148506
find_jinv	148318
hasse_bounds	148443
hclassno_wrapper	200359
height_margin	5001
index_to_evec	1379
logfac	0
modinv_has_sign_ambiguity	5001
modinv_inverted_involution	2065
modinv_negated_involution	2065
modinv_units	3964
next_generator	5613
next_prime_evec	1225
norm_eqn_set	188770
oneroot_of_classpoly	148801
orient_pcp	287
oriented_n_action	6398
pcp_get_D	157153
pcp_get_D0	200359
pcp_get_L	9566
pcp_get_L0	9566
pcp_get_fau	5001
pcp_get_h	200359
pcp_get_inv	157341
pcp_get_k	11686
pcp_get_m	6965
pcp_get_n	6685
pcp_get_o	6685
pcp_get_orient_p	6965
pcp_get_orient_q	6965
pcp_get_orient_reps	6685
pcp_get_r	6685
pcp_get_u	147170
polclass	2184
polclass0	6506
polclass_psum	560
polclass_roots_modp	147034
polclass_small_disc	1505
polclass_worker	147183
primecmp	1305422
quadnegclassnou	5001
random_FleV	914200
select_classpoly_prime_pool	5001
select_classpoly_primes	5001
test_curve_order	177599
torsion_constraint	443719
upper_bound_on_classpoly_coeffs	5001
vecsmall_isin_skip	7630
verify_2path	672
verify_edge	3656

Generated by: LCOV version 1.16