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 30702-bddb8d6928) Lines: 825 846 97.5 % Date: 2026-02-23 02:23:56 Functions: 72 73 98.6 % Legend: Lines: hit not hit

Function Name	Hit count
logfac	0
evec_inverse	145
evec_equal	165
orient_pcp	217
evec_compose	370
polclass_psum	432
verify_2path	480
evec_inverse_o	505
distinct_inverses	705
next_prime_evec	875
index_to_evec	997
polclass_small_disc	1285
modinv_inverted_involution	1499
modinv_negated_involution	1499
famatsmall_divexact	1531
polclass	1738
check_modinv	2198
verify_edge	2612
modinv_units	3076
evec_n_to_m	3350
evec_orders	3350
classgp_pcp_check_generators	3365
classgp_make_pcp	3822
height_margin	3822
modinv_has_sign_ambiguity	3822
pcp_get_fau	3822
quadnegclassnou	3822
select_classpoly_prime_pool	3822
select_classpoly_primes	3822
upper_bound_on_classpoly_coeffs	3822
evec_clear	3860
evec_ri_mutate	4063
next_generator	4207
evec_order	4237
adjust_orientation	4862
oriented_n_action	4862
pcp_get_n	5079
pcp_get_o	5079
pcp_get_orient_reps	5079
pcp_get_r	5079
polclass0	5107
pcp_get_m	5291
pcp_get_orient_p	5291
pcp_get_orient_q	5291
vecsmall_isin_skip	5473
pcp_get_L	7138
pcp_get_L0	7138
evec_to_index	7954
adjust_signs	8354
pcp_get_k	8901
evec_ri	9281
evec_copy	9464
Flv_powsum_pre	11510
evec_reduce	15808
pcp_get_u	111244
polclass_roots_modp	111244
polclass_worker	111244
find_jinv	112207
best_torsion_constraint	112243
hasse_bounds	112243
find_j_inv_with_given_trace	112325
oneroot_of_classpoly	112325
pcp_get_D	118888
pcp_get_inv	119105
test_curve_order	134578
norm_eqn_set	142625
factor_uv	146687
hclassno_wrapper	150509
pcp_get_D0	150509
pcp_get_h	150509
torsion_constraint	336729
random_FleV	680609
primecmp	984231

Generated by: LCOV version 1.16