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:

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 - polmodular.c (source / functions) Hit Total Coverage
Test: PARI/GP v2.18.1 lcov report (development 30401-87099e65a6) Lines: 2595 2666 97.3 %
Date: 2025-07-18 09:23:12 Functions: 157 157 100.0 %
Legend: Lines: hit not hit

Function Name Sort by function name Hit count Sort by hit count
Fl_addmul2 60043825
Fl_addmul3 11155332
Fl_addmul4 5173213
Fl_addmul5 25720444
Fl_mul4 1769299
Fl_mul5 96360
Fl_mul6 788446
Fl_mul7 96359
Fl_mul8 884763
Fle_quotient_from_kernel_generator 96360
Flm_Fl_phi2_evalx 28253339
Flm_Fl_phi3_evalx 3724928
Flm_Fl_phi5_evalx 5164136
Flm_Fl_polmodular_evalx 44164033
Flv_deriv_pre_inplace 2464
Flv_lastnonzero 337608
Flv_powu_inplace_pre 39865
Flx_double_eta_jpoly 33127
Flx_double_eta_xpoly 62435
FpV_deriv 56
Fp_modinv_to_j 1162
Fp_polmodular_evalx 126
_qsort_cmp 15283378
append_neighbours 614138
calc_primes_for_discriminants 3201
carray_reverse_inplace 19448
check_generators 809918
compute_L_isogenous_curve 87720
db_add_levels 24
disc_best_modinv 1907423
discriminant_with_classno_at_least 3199
double_eta_Fl 34684
double_eta_exponent 69118
double_eta_initial_js 6928
double_eta_power 33127
double_eta_raw 35412
double_eta_raw_to_Fl 40857
double_eta_raw_to_Fp 455
double_eta_root 35536
eighth_root 5368
enum_volcano_floor 40400
enum_volcano_surface 40401
eval_modpoly_modp 2674
find_L_tors_point 140797
find_noniso_L_isogenous_curve 87728
fourth_root 3926
get_Lsqr_cycle 40400
inflate_polys 10047
internal_db 24960
interpolate_coeffs 43091
make_pcp_floor 3077
make_pcp_surface 3077
mkqfis 144717
modfn_preimage 66943
modfn_root 200997
modfn_unambiguous_root 20906
modinv_degree 7432398
modinv_double_eta_from_2j 20828
modinv_double_eta_from_j 6928
modinv_double_eta_good_disc 5494837
modinv_f3_from_j 358
modinv_f_from_j 3196
modinv_good_atkin 661521
modinv_good_disc 15152433
modinv_good_prime 11344184
modinv_height_factor 22916562
modinv_is_Weber 1008
modinv_is_double_eta 254598
modinv_j_from_2double_eta 6172
modinv_j_from_f 1844
modinv_level 41288
modinv_max_internal_level 28145
modinv_odd_conductor 565092
modinv_parent 140
modinv_parent_power 140
modinv_pfilter 16397
modinv_ramified 798
modinv_sparse_factor 46656
modpoly_height_bound 3199
modpoly_pickD 3201
modpoly_pickD_primes 13196
normalise_coeffs 10047
oneroot_of_classpoly 40396
orientation_ambiguity 54932
phi2_ZV 20015
phi2_atkin11_ZV 7
phi2_atkin13_ZV 14
phi2_atkin17_ZV 21
phi2_atkin19_ZV 14
phi2_atkin3_ZV 7
phi2_atkin5_ZV 14
phi2_atkin7_ZV 7
phi2_g2_ZV 105
phi2_w3w13_ZV 14
phi2_w3w3e2_ZV 21
phi2_w3w5_ZV 35
phi2_w5w7_ZV 63
phi3_ZV 1910
phi3_f3_ZV 21
phi3_w2w13_ZV 42
phi3_w2w7_ZV 182
phi5_ZV 1880
phi5_f_ZV 189
phi5_w2w3_ZV 56
phi5_w3w3_ZV 63
phi5_w3w7_ZV 49
phi7_w2w5_ZV 91
phi_atkin11_j 469
phi_atkin13_j 2682
phi_atkin17_j 4110
phi_atkin19_j 1535
phi_atkin3_j 924
phi_atkin5_j 1190
phi_atkin7_j 301
phi_w2w13_j 2402
phi_w2w3_j 1060
phi_w2w5_j 2927
phi_w2w7_j 6628
phi_w3w13_j 210
phi_w3w3_j 3825
phi_w3w5_j 1160
phi_w3w7_j 2986
phi_w5w7_j 3003
polmodular 651
polmodular0_ZM 28026
polmodular0_powerup_ZM 140
polmodular_ZM 19266
polmodular_ZXX 19182
polmodular_db_add_level 27080
polmodular_db_add_levels 5257
polmodular_db_for_inv 387258
polmodular_db_getp 560140
polmodular_db_init 21492
polmodular_small_ZM 24960
polmodular_split_p_Flm 40394
polmodular_worker 40389
prime_to_conductor 3493271
primeform_discrete_log 210552
primeform_exp_order 1114438
qfb_distinct_prods 234312
qfb_is_two_torsion 1716120
qfb_nform 144620
qform_primeform2 83180
red_primeform 3493271
root_matrix 40400
roots_to_coeffs 42764
safe_abs_sqrt 10317
scanD0 3201
select_L0 3199
select_curve_with_L_tors_point 87721
sixth_root 5721
sympol_to_ZM 24820
twelth_root 893
update_Lsqr_cycle 573733
vecsmall_pick 614133
verify_L_sylow_is_cyclic 49032
weber_exponent 77

Generated by: LCOV version 1.16