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 30818-1d7bcd2a3c) Lines: 1882 2319 81.2 % Date: 2026-04-16 09:26:05 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	75
ECM_init	75
ECM_loop	129
dvdii_inplace	231
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
ifac_factoru	807
pollardbrent_i	837
uis_357_powermod_32bit_2	837
update_pow	908
factoru_is_2357_power	1071
ispowerful	1708
diviiexact_inplace	1838
squfof_ambig	2007
ifac_start	2523
ifac_decomp	2600
Z_factor_until	3045
ellfacteur	3286
ifac_insert_multiplet	3297
pollardbrent	3524
squfof	5092
maxomegaoddu	5268
vecfactoroddu_i	5268
ifac_crack	5791
ifac_whoiswho	5796
ifac_start_hint	5930
ifac_next	6477
vecfactorsquarefreeu	7014
uisprime_nosmall	8605
ifac_divide	9791
ecm_elladd2	9966
factorint	10290
ifac_checkprime	11262
uis_357_powermod_32bit_1	13731
ifac_main	14133
ifac_find	15213
STOREi	27799
ifac_isprime	28056
vecfactoru_i	32073
vecfactorsquarefreeu_coprime	32677
ZV_aff	35508
ellmult	35508
special_primes	36104
ifac_delete	45761
INIT	51698
moebiusu_fact	54194
Z_factor_limit	55356
elldouble	55433
moebius	56678
Z_has_prime_3mod4	61152
Z_has_prime_3mod4_i	61152
is_pth_power	64307
coreu	64450
maxomegau	71841
nextprime0	119154
nextprime	130788
Z_oddprimedivisors_fast	141531
aux_end	142967
Z_factor_primes	163127
Z_oddprimedivisors_gcd	164259
Z_issmooth_fact	175737
absZ_factor_limit	288149
get_rule	288304
ecm_elladd	324076
ecm_elladd0	332228
is_kth_power	416411
core	711007
STOREu	737848
STORE	765799
absZ_factor_limit_strict	897903
tridiv_bound	911504
u_oddprimedivisors_gcd	942703
unextprime_overflow	1000235
factoru_primes	1086309
unextprime	1138208
uis_357_power	2366984
uis_357_powermod	2417931
moebiusu	2487978
is_357_power	2796814
factoru	3798431
absZ_factor	3896338
check_res	3921124
tridiv_boundu	4718430
snextpr	6162410
Z_factor	10196481
ifactor	10262148
FpE_add_i	11165120
ifactor_sign	15347452
u_357_divides	16847453
factoru_result	18544705
factoru_sign	19003471
one_iter	36732339
matsmalltrunc_init	63995623
u_forprime_next_fast	145058844
matsmalltrunc_append	156421174

Generated by: LCOV version 1.16