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 30622-caa25a75db) Lines: 1861 2294 81.1 % Date: 2026-01-22 09:18:00 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	43
precprime	56
ECM_alloc	57
ECM_init	57
ECM_loop	93
dvdii_inplace	220
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	804
ifac_factoru	807
uis_357_powermod_32bit_2	837
update_pow	908
factoru_is_2357_power	1062
ispowerful	1708
diviiexact_inplace	1821
squfof_ambig	2007
maxomegaoddu	2193
vecfactoroddu_i	2193
ifac_start	2523
ifac_decomp	2577
Z_factor_until	3045
ellfacteur	3263
ifac_insert_multiplet	3280
pollardbrent	3491
squfof	5059
ifac_crack	5757
ifac_whoiswho	5762
ifac_start_hint	5907
ifac_next	6477
uisprime_nosmall	6712
vecfactorsquarefreeu	7014
ecm_elladd2	7194
ifac_divide	9734
factorint	10281
ifac_checkprime	11194
uis_357_powermod_32bit_1	13730
ifac_main	14053
ifac_find	15133
ZV_aff	25650
ellmult	25650
STOREi	27474
ifac_isprime	27700
vecfactoru_i	28968
vecfactorsquarefreeu_coprime	32677
special_primes	35553
elldouble	40073
ifac_delete	45566
INIT	51480
Z_factor_limit	53740
moebiusu_fact	54194
moebius	58555
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
coreu	62975
is_pth_power	63754
maxomegau	68736
nextprime	130788
Z_oddprimedivisors_fast	140041
aux_end	141435
Z_factor_primes	161637
Z_oddprimedivisors_gcd	162769
Z_issmooth_fact	176131
get_rule	208727
ecm_elladd	234487
ecm_elladd0	240431
absZ_factor_limit	252770
is_kth_power	410279
core	617437
STOREu	729546
STORE	757172
absZ_factor_limit_strict	777575
tridiv_bound	802162
u_oddprimedivisors_gcd	886848
unextprime_overflow	996536
factoru_primes	1029107
unextprime	1134501
moebiusu	2317176
uis_357_power	2366455
uis_357_powermod	2417153
is_357_power	2796005
absZ_factor	3742432
factoru	3767603
check_res	3919303
tridiv_boundu	4479245
snextpr	4531317
FpE_add_i	8291496
Z_factor	10089624
ifactor	10153720
ifactor_sign	14929573
u_357_divides	16433833
factoru_result	18124309
factoru_sign	18555904
one_iter	28252395
matsmalltrunc_init	38616392
matsmalltrunc_append	98726579
u_forprime_next_fast	141081780

Generated by: LCOV version 1.16