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 - base4.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30676-32b8a71ec1) Lines: 1696 1847 91.8 % Date: 2026-02-14 09:22:40 Functions: 170 185 91.9 % Legend: Lines: hit not hit

Function Name	Hit count
Fl_invgen	5900884
Q_nffactor	28499
Q_to_famat	197087
RM_round_maxrank	97992
ZM_famat_limit	568154
ZV_cba	28
ZV_cba_extend	49
Z_cba	757267
Z_cba_rec	6827597
Z_dcba_rec	0
Z_ppgle	0
Z_ppio	986062
Z_ppo	19279828
Z_to_famat	376306
_idealaddtoone	803210
_idealmulred	28606
_idealsqrred	35754
_mul	11385
_sqr	35754
addmul_mat	66591
append	154122
chk_vdir	21
err_divexact	7
ext_inv	20408
ext_mul	60619
ext_pow	0
ext_sqr	33941
factorbackprime	75598
famatV_factorback	13814
famatV_zv_factorback	56272
famat_Z_gcd	0
famat_add	160833
famat_div	200130
famat_div_shallow	10311
famat_idealfactor	0
famat_inv	199374
famat_inv_shallow	26952
famat_makecoprime	2220934
famat_mul	449636
famat_mul_shallow	225066
famat_mulpow_shallow	88321
famat_mulpows_shallow	147670
famat_pow	60642
famat_pow_shallow	62006
famat_pows_shallow	152029
famat_reduce	306363
famat_remove_trivial	66999
famat_sqr	22979
famat_sub	20904
famat_to_Fp_coprime	665
famat_to_nf	0
famat_to_nf_moddivisor	18606
famatsmall_reduce	184670
get_random_a	117742
gpidealfactor	189
gpidealval	7119
hnf_QC_QC	7
hnf_Q_Q	21
hnf_Q_QC	77
hnf_Z_QC	70
hnf_Z_ZC	77
idealHNF_Z_factor	0
idealHNF_Z_factor_i	293989
idealHNF_factor	240101
idealHNF_factor_i	293989
idealHNF_inv	69862
idealHNF_inv_Z	211933
idealHNF_mul	474466
idealHNF_mul_two	975159
idealHNF_norm_pval	4248264
idealHNF_val	4385934
idealadd	83578
idealaddmultoone	35
idealaddtoone	98
idealaddtoone0	70
idealaddtoone_i	17633
idealaddtoone_raw	785577
idealappr	14
idealappr0	14
idealapprfact	0
idealapprfact_i	54082
idealcoprime	84
idealcoprimefact	37191
idealdiv	39744
idealdiv0	56
idealdivexact	5263
idealdivpowprime	13007
idealdown	3031
idealfactor	268290
idealfactor_limit	268717
idealfactor_partial	25515
idealhnf	665
idealhnf0	413
idealhnf_principal	1391720
idealhnf_shallow	1855818
idealhnf_two	802900
idealintersect	21
idealinv	115840
idealismaximal	77
idealismaximal_i	77
idealismaximal_int	42
idealismaximal_mat	21
idealispower	3906
idealmin	7
idealmul	512026
idealmul0	70
idealmul_aux	512026
idealmulelt	266228
idealmulpowprime	828272
idealmulred	17221
idealnorm	105784
idealnumden	389738
idealpow	942562
idealpow0	2499
idealpow_aux	942563
idealpowprime	1309726
idealpowred	80024
idealpows	313346
idealprod	1064
idealprodprime	666
idealprodval	1917
idealpseudomin	142425
idealpseudomin_nonscalar	0
idealpseudominvec	1252980
idealpseudored	1344890
idealred0	138492
idealred_elt	13398
idealredmodpower	59192
idealredmodpower_i	118369
idealsqr	39240
idealsqr_aux	39240
idealsqrprime	317616
idealsqrtn_int	7756
idealtwoelt	97411
idealtwoelt0	2485
idealtwoelt2	42
idealtyp	16545184
idealval	9801785
in_ideal	28
isideal	91
lcmuu	1638917
make_integral	10920
mat_ideal_two_elt	250558
mat_ideal_two_elt2	21
matreduce	63
nfV_eltembed	84
nfV_idealhnf	84
nf_coprime_part	126
nf_get_Gtwist	138499
nf_get_Gtwist1	12667
nf_remove_denom_p	4376617
nf_to_Fp_coprime	119798
nfdivmodpr	0
nfkermodpr	0
nfmulmodpr	7
nfpowmodpr	0
nfsolvemodpr	0
nfweilheight	84
nfweilheight_i	84
not_in_ideal	14
ok_elt	225089
p_makecoprime	94891
prV_e_muls	28505
prV_lcm_capZ	80948
prV_primes	66234
pr_hnf	3801314
pr_inv	17870
pr_inv_p	38325
pr_uniformizer	58379
ramified_root	7749
ramified_root_simple	7
sunits_makecoprime	98
to_Fp_coprime	122255
to_famat	0
to_famat_shallow	2768094
trivial_merge	28
twistG	12709
u_ppo	54298909
vec_mulid	91
vecdiv	903
vecinv	826
vecmul	16004626
vecpow	0
vecsqr	185983
zk_pvalrem	4330819

Generated by: LCOV version 1.16