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 30605-980f9eb85c) Lines: 1861 2294 81.1 % Date: 2026-01-12 09:21:57 Functions: 111 126 88.1 % 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	2235
vecfactoroddu_i	2235
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	27801
ifac_isprime	27960
vecfactoru_i	31967
vecfactorsquarefreeu_coprime	32675
special_primes	36081
elldouble	40073
ifac_delete	45557
INIT	51470
moebiusu_fact	54194
Z_factor_limit	55364
moebius	59605
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
coreu	63022
is_pth_power	64266
maxomegau	71732
nextprime	130788
Z_oddprimedivisors_fast	141485
aux_end	142921
Z_factor_primes	163081
Z_oddprimedivisors_gcd	164213
Z_issmooth_fact	175570
get_rule	208727
ecm_elladd	234487
ecm_elladd0	240431
absZ_factor_limit	287374
is_kth_power	415445
core	709577
STOREu	737684
STORE	765637
absZ_factor_limit_strict	895400
u_oddprimedivisors_gcd	908997
tridiv_bound	909024
unextprime_overflow	1000171
factoru_primes	1052555
unextprime	1138160
uis_357_power	2366962
uis_357_powermod	2417837
moebiusu	2491546
is_357_power	2796721
factoru	3797723
absZ_factor	3844066
check_res	3920879
snextpr	4531317
tridiv_boundu	4668066
FpE_add_i	8291496
Z_factor	10194391
ifactor	10260100
ifactor_sign	15289898
u_357_divides	16794193
factoru_result	18487363
factoru_sign	18945274
one_iter	28233142
matsmalltrunc_init	39350766
matsmalltrunc_append	100644800
u_forprime_next_fast	144386815

Generated by: LCOV version 1.16