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 30764-6b81f1f3fa) Lines: 1881 2319 81.1 % Date: 2026-03-26 09:27:02 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	11165194
INIT	51698
SHALLOWCOPY	0
STORE	765840
STOREi	27800
STOREu	737889
ZV_aff	35508
Z_ECM	0
Z_factor	10196629
Z_factor_limit	55361
Z_factor_primes	163134
Z_factor_until	3045
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
Z_issmooth	0
Z_issmooth_fact	175946
Z_oddprimedivisors_fast	141538
Z_oddprimedivisors_gcd	164266
Z_pollardbrent	0
Z_pval_inplace	762
Z_to_Up	14
Zn_ispower	756
Zp_ispower	798
absZ_factor	3896380
absZ_factor_limit	288151
absZ_factor_limit_strict	897968
aux_end	142974
check_res	3921087
core	710995
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	55432
ellfacteur	3286
ellmult	35508
factorint	10290
factoru	3799139
factoru_is_2357_power	1071
factoru_is_2357_power_special	6
factoru_primes	1086313
factoru_result	18545236
factoru_sign	19004252
get_rule	288303
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	28060
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	10262234
ifactor_sign	15347712
is_357_power	2796802
is_kth_power	415750
is_pth_power	64302
ispowerful	1708
matsmalltrunc_append	169247104
matsmalltrunc_init	67691491
maxomegaoddu	5294
maxomegau	71840
moebius	58753
moebiusu	2517267
moebiusu_fact	54194
nextprime	130788
nextprime0	119154
one_iter	36728772
pollardbrent	3525
pollardbrent_i	838
precprime	56
radicalu	0
rho_dbg	0
snextpr	6162410
special_primes	36105
squfof	5093
squfof_ambig	2007
tridiv_bound	911572
tridiv_boundu	4716266
u_357_divides	16868719
u_forprime_next_fast	145609809
u_oddprimedivisors_gcd	942704
uis_357_power	2366985
uis_357_powermod	2417917
uis_357_powermod_32bit_1	13731
uis_357_powermod_32bit_2	837
uisprime_nosmall	8605
unextprime	1138191
unextprime_overflow	1000215
update_pow	908
uprecprime	38
vecfactoroddu	0
vecfactoroddu_i	5294
vecfactorsquarefreeu	7014
vecfactorsquarefreeu_coprime	32676
vecfactoru	0
vecfactoru_i	32073
vecsquarefreeu	49

Generated by: LCOV version 1.16