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 - modules Coverage Total Hit Test: PARI/GP v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 95.6 % 12493 11947 Test Date: 2026-07-23 17:04:59 Functions: 99.0 % 813 805 Legend: Rating: low: < 75 % medium: >= 75 % high: >= 90 %

File	Line Coverage				Function Coverage
	Rate		Total	Hit	Rate	Total	Hit
part.c		81.5 %	189	154	92.3 %	13	12
galpol.c		83.3 %	54	45	100.0 %	4	4
groupid.c		85.3 %	224	191	87.5 %	8	7
genus2red.c		91.6 %	1559	1428	100.0 %	60	60
stark.c		92.7 %	1838	1704	98.5 %	134	132
ellmanin.c		93.8 %	48	45	100.0 %	4	4
ellfromeqn.c		93.8 %	145	136	100.0 %	11	11
elldata.c		94.7 %	151	143	100.0 %	16	16
thue.c		95.1 %	989	941	98.5 %	65	64
galois.c		96.2 %	1861	1790	97.3 %	74	72
ratpoints.c		96.7 %	911	881	100.0 %	33	33
krasner.c		98.0 %	442	433	100.0 %	35	35
algebras.c		99.3 %	3989	3963	99.7 %	345	344
forperm.c		100.0 %	37	37	100.0 %	4	4
forsubset.c		100.0 %	56	56	100.0 %	7	7

Generated by: LCOV version 2.0-1