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 30674-be81ecfdd4) Lines: 1696 1847 91.8 % Date: 2026-02-10 09:23:17 Functions: 170 185 91.9 % Legend: Lines: hit not hit

Function Name	Hit count
Z_dcba_rec	0
Z_ppgle	0
ext_pow	0
famat_Z_gcd	0
famat_idealfactor	0
famat_to_nf	0
idealHNF_Z_factor	0
idealapprfact	0
idealpseudomin_nonscalar	0
nfdivmodpr	0
nfkermodpr	0
nfpowmodpr	0
nfsolvemodpr	0
to_famat	0
vecpow	0
err_divexact	7
hnf_QC_QC	7
idealmin	7
nfmulmodpr	7
ramified_root_simple	7
idealappr	14
idealappr0	14
not_in_ideal	14
chk_vdir	21
hnf_Q_Q	21
idealintersect	21
idealismaximal_mat	21
mat_ideal_two_elt2	21
ZV_cba	28
in_ideal	28
trivial_merge	28
idealaddmultoone	35
idealismaximal_int	42
idealtwoelt2	42
ZV_cba_extend	49
idealdiv0	56
matreduce	63
hnf_Z_QC	70
idealaddtoone0	70
idealmul0	70
hnf_Q_QC	77
hnf_Z_ZC	77
idealismaximal	77
idealismaximal_i	77
idealcoprime	84
nfV_eltembed	84
nfV_idealhnf	84
nfweilheight	84
nfweilheight_i	84
isideal	91
vec_mulid	91
idealaddtoone	98
sunits_makecoprime	98
nf_coprime_part	126
gpidealfactor	189
idealhnf0	413
famat_to_Fp_coprime	665
idealhnf	665
idealprodprime	666
vecinv	826
vecdiv	903
idealprod	1064
idealprodval	1917
idealtwoelt0	2485
idealpow0	2499
idealdown	3031
idealispower	3906
idealdivexact	5263
gpidealval	7119
ramified_root	7749
idealsqrtn_int	7756
famat_div_shallow	10311
make_integral	10920
_mul	11384
nf_get_Gtwist1	12667
twistG	12709
idealdivpowprime	13007
idealred_elt	13399
famatV_factorback	13814
idealmulred	17221
idealaddtoone_i	17633
pr_inv	17872
famat_to_nf_moddivisor	18606
ext_inv	20410
famat_sub	20903
famat_sqr	22979
idealfactor_partial	25515
famat_inv_shallow	26952
Q_nffactor	28508
prV_e_muls	28513
_idealmulred	28605
ext_sqr	33941
_idealsqrred	35754
_sqr	35754
idealcoprimefact	37191
pr_inv_p	38323
idealsqr	39240
idealsqr_aux	39240
idealdiv	39744
idealapprfact_i	54082
famatV_zv_factorback	56273
pr_uniformizer	58379
idealredmodpower	59192
ext_mul	60619
famat_pow	60642
famat_pow_shallow	62006
prV_primes	66234
addmul_mat	66549
famat_remove_trivial	67000
idealHNF_inv	69862
factorbackprime	75598
idealpowred	80023
prV_lcm_capZ	80948
idealadd	83578
famat_mulpow_shallow	88321
p_makecoprime	94901
idealtwoelt	97410
RM_round_maxrank	97993
idealnorm	105784
idealinv	115842
get_random_a	117742
idealredmodpower_i	118370
nf_to_Fp_coprime	119798
to_Fp_coprime	122255
idealred0	138491
nf_get_Gtwist	138499
idealpseudomin	142427
famat_mulpows_shallow	147671
famat_pows_shallow	152033
append	154121
famat_add	160836
famatsmall_reduce	184675
vecsqr	185983
Q_to_famat	197087
famat_inv	199377
famat_div	200130
idealHNF_inv_Z	211939
ok_elt	225051
famat_mul_shallow	225074
idealHNF_factor	240104
mat_ideal_two_elt	250559
idealmulelt	266228
idealfactor	268304
idealfactor_limit	268731
idealHNF_Z_factor_i	293992
idealHNF_factor_i	293992
famat_reduce	306365
idealpows	313344
idealsqrprime	317603
Z_to_famat	376307
idealnumden	389737
famat_mul	449637
idealHNF_mul	474441
idealmul	512025
idealmul_aux	512025
ZM_famat_limit	568153
Z_cba	757267
idealaddtoone_raw	785589
idealhnf_two	802885
_idealaddtoone	803223
idealmulpowprime	828269
idealpow	942533
idealpow_aux	942538
idealHNF_mul_two	975119
Z_ppio	986062
idealpseudominvec	1252981
idealpowprime	1309721
idealpseudored	1344889
idealhnf_principal	1391724
lcmuu	1638770
idealhnf_shallow	1855832
famat_makecoprime	2220940
to_famat_shallow	2768094
pr_hnf	3801333
idealHNF_norm_pval	4248190
zk_pvalrem	4330776
nf_remove_denom_p	4376566
idealHNF_val	4385916
Fl_invgen	5900574
Z_cba_rec	6827597
idealval	9801605
vecmul	16004689
idealtyp	16545026
Z_ppo	19279487
u_ppo	54298714

Generated by: LCOV version 1.16