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 30634-7c77b4d1a9) Lines: 1881 2319 81.1 % Date: 2026-01-25 09:23:13 Functions: 112 127 88.2 % Legend: Lines: hit not hit

Function Name	Hit count
COPY	0
SHALLOWCOPY	0
Z_ECM	0
Z_issmooth	0
Z_pollardbrent	0
coreu_fact	0
ifac_GC	0
ifac_check	0
ifac_factor_dbg	0
ifac_print	0
ifac_realloc	0
radicalu	0
rho_dbg	0
vecfactoroddu	0
vecfactoru	0
factoru_is_2357_power_special	6
ifac_ispowerful	7
ifac_resort	7
ifac_sort_one	7
Z_to_Up	14
ifac_defrag	14
uprecprime	38
vecsquarefreeu	49
precprime	56
ECM_alloc	57
ECM_init	57
ECM_loop	93
dvdii_inplace	219
ifac_moebius	236
coreu_init_from_squarefree	247
ifac_skip	320
core_init_from_squarefree	327
ifac_core	353
ifac_moebiusu	663
Zn_ispower	756
ifac_read	760
Z_pval_inplace	762
Zp_ispower	798
pollardbrent_i	802
ifac_factoru	807
uis_357_powermod_32bit_2	837
update_pow	908
factoru_is_2357_power	1071
ispowerful	1708
diviiexact_inplace	1820
squfof_ambig	2007
maxomegaoddu	2221
vecfactoroddu_i	2221
ifac_start	2523
ifac_decomp	2576
Z_factor_until	3045
ellfacteur	3262
ifac_insert_multiplet	3279
pollardbrent	3489
squfof	5057
ifac_crack	5755
ifac_whoiswho	5760
ifac_start_hint	5906
ifac_next	6477
uisprime_nosmall	6721
vecfactorsquarefreeu	7014
ecm_elladd2	7194
ifac_divide	9731
factorint	10290
ifac_checkprime	11190
uis_357_powermod_32bit_1	13730
ifac_main	14049
ifac_find	15129
ZV_aff	25650
ellmult	25650
STOREi	27799
ifac_isprime	27960
vecfactoru_i	31967
vecfactorsquarefreeu_coprime	32677
special_primes	36079
elldouble	40073
ifac_delete	45557
INIT	51470
moebiusu_fact	54194
Z_factor_limit	55363
moebius	59693
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
coreu	63022
is_pth_power	64264
maxomegau	71735
nextprime0	119154
nextprime	130788
Z_oddprimedivisors_fast	141475
aux_end	142912
Z_factor_primes	163072
Z_oddprimedivisors_gcd	164204
Z_issmooth_fact	175835
get_rule	208727
ecm_elladd	234487
ecm_elladd0	240431
absZ_factor_limit	287388
is_kth_power	414641
core	709579
STOREu	737663
STORE	765614
absZ_factor_limit_strict	895427
u_oddprimedivisors_gcd	909004
tridiv_bound	909038
unextprime_overflow	1000218
factoru_primes	1052553
unextprime	1138190
uis_357_power	2366960
uis_357_powermod	2417837
moebiusu	2484419
is_357_power	2796718
factoru	3797477
absZ_factor	3844114
check_res	3920888
snextpr	4531317
tridiv_boundu	4671642
FpE_add_i	8291496
Z_factor	10194487
ifactor	10260216
ifactor_sign	15289977
u_357_divides	16792138
factoru_result	18487317
factoru_sign	18945192
one_iter	28255155
matsmalltrunc_init	39093151
matsmalltrunc_append	100237796
u_forprime_next_fast	144617436

Generated by: LCOV version 1.16