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Revision 1.15, Sat Feb 23 03:10:06 2019 UTC (5 years, 1 month ago) by kamil
Branch: MAIN
Changes since 1.14: +2 -1 lines 

Add KCOV - kernel code coverage tracing device

The KCOV driver implements collection of code coverage inside the kernel.
It can be enabled on a per process basis from userland, allowing the kernel
program counter to be collected during syscalls triggered by the same
process.

The device is oriented towards kernel fuzzers, in particular syzkaller.

Currently the only supported coverage type is -fsanitize-coverage=trace-pc.

The KCOV driver was initially developed in Linux. A driver based on the
same concept was then implemented in FreeBSD and OpenBSD.

Documentation is borrowed from OpenBSD and ATF tests from FreeBSD.

This patch has been prepared by Siddharth Muralee, improved by <maxv>
and polished by myself before importing into the mainline tree.

All ATF tests pass.

# $NetBSD: Makefile,v 1.15 2019/02/23 03:10:06 kamil Exp $

.include <bsd.own.mk>

TESTSDIR=	${TESTSBASE}/modules
CPPFLAGS+=	-D_KERNTYPES

# Ideally this test could be in the parent Makefile, which could not descend
# into this directory at all.  Unfortunately, the etc/mtree/NetBSD.dist file
# creates the 'modules' subdirectory unconditionally, which if left empty
# will confuse atf-run.  Therefore we must install, at the very least, the
# Atffile into it.
TESTS_C=	t_modctl
TESTS_C+=	t_builtin
TESTS_C+=	t_kcov
LDADD=		-lprop
LDADD+=		-lrumpfs_kernfs -lrumpvfs -lrump -lrumpuser -lrump -lpthread

TESTS_SH=	t_abi_uvm
TESTS_SH+=	t_modload
TESTS_SH+= 	t_klua_pr_52864
TESTS_SH+=	t_threadpool

SUBDIR=		k_helper
SUBDIR+=	k_helper2
SUBDIR+=	k_helper3
SUBDIR+=	k_uvm
SUBDIR+=	threadpool_tester

.include <bsd.test.mk>