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 - ifactor1.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30786-ffec283a2b) Lines: 1882 2319 81.2 % Date: 2026-04-07 09:25:56 Functions: 112 127 88.2 % Legend: Lines: hit not hit

Function Name	Hit count
COPY	0
ECM_alloc	75
ECM_init	75
ECM_loop	129
FpE_add_i	11165508
INIT	51698
SHALLOWCOPY	0
STORE	765826
STOREi	27798
STOREu	737876
ZV_aff	35508
Z_ECM	0
Z_factor	10196523
Z_factor_limit	55360
Z_factor_primes	163138
Z_factor_until	3045
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
Z_issmooth	0
Z_issmooth_fact	175558
Z_oddprimedivisors_fast	141543
Z_oddprimedivisors_gcd	164271
Z_pollardbrent	0
Z_pval_inplace	762
Z_to_Up	14
Zn_ispower	756
Zp_ispower	798
absZ_factor	3896329
absZ_factor_limit	288152
absZ_factor_limit_strict	897936
aux_end	142979
check_res	3921128
core	710978
core_init_from_squarefree	327
coreu	64436
coreu_fact	0
coreu_init_from_squarefree	247
diviiexact_inplace	1838
dvdii_inplace	231
ecm_elladd	324077
ecm_elladd0	332229
ecm_elladd2	9966
elldouble	55433
ellfacteur	3286
ellmult	35508
factorint	10290
factoru	3798493
factoru_is_2357_power	1071
factoru_is_2357_power_special	6
factoru_primes	1086330
factoru_result	18544812
factoru_sign	19003441
get_rule	288305
ifac_GC	0
ifac_check	0
ifac_checkprime	11262
ifac_core	353
ifac_crack	5791
ifac_decomp	2600
ifac_defrag	14
ifac_delete	45761
ifac_divide	9791
ifac_factor_dbg	0
ifac_factoru	807
ifac_find	15213
ifac_insert_multiplet	3297
ifac_ispowerful	7
ifac_isprime	28058
ifac_main	14133
ifac_moebius	236
ifac_moebiusu	663
ifac_next	6477
ifac_print	0
ifac_read	760
ifac_realloc	0
ifac_resort	7
ifac_skip	320
ifac_sort_one	7
ifac_start	2523
ifac_start_hint	5930
ifac_whoiswho	5796
ifactor	10262214
ifactor_sign	15347518
is_357_power	2796809
is_kth_power	417979
is_pth_power	64313
ispowerful	1708
matsmalltrunc_append	154826407
matsmalltrunc_init	63223510
maxomegaoddu	5119
maxomegau	71839
moebius	56617
moebiusu	2480408
moebiusu_fact	54194
nextprime	130788
nextprime0	119154
one_iter	36741318
pollardbrent	3525
pollardbrent_i	838
precprime	56
radicalu	0
rho_dbg	0
snextpr	6162411
special_primes	36103
squfof	5093
squfof_ambig	2007
tridiv_bound	911541
tridiv_boundu	4715457
u_357_divides	16843148
u_forprime_next_fast	144833893
u_oddprimedivisors_gcd	942713
uis_357_power	2366983
uis_357_powermod	2417925
uis_357_powermod_32bit_1	13731
uis_357_powermod_32bit_2	837
uisprime_nosmall	8605
unextprime	1138221
unextprime_overflow	1000246
update_pow	908
uprecprime	38
vecfactoroddu	0
vecfactoroddu_i	5119
vecfactorsquarefreeu	7014
vecfactorsquarefreeu_coprime	32676
vecfactoru	0
vecfactoru_i	32072
vecsquarefreeu	49

Generated by: LCOV version 1.16