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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{10..13} )
LLVM_MAX_SLOT=17
LLVM_MIN_SLOT=14
inherit toolchain-funcs llvm optfeature python-single-r1
AFL_PATCHSET="${PN}-4.07c-patches"
DESCRIPTION="Fork of AFL, the popular compile-time instrumentation fuzzer"
HOMEPAGE="https://github.com/AFLplusplus/AFLplusplus"
SRC_URI="https://github.com/AFLplusplus/AFLplusplus/archive/v${PV}.tar.gz -> ${P}.tar.gz"
SRC_URI+=" https://dev.gentoo.org/~sam/distfiles/${CATEGORY}/${PN}/${AFL_PATCHSET}.tar.xz"
S="${WORKDIR}"/AFLplusplus-${PV}
LICENSE="Apache-2.0"
SLOT="0"
KEYWORDS="amd64 arm64"
IUSE="test"
REQUIRED_USE="${PYTHON_REQUIRED_USE}"
# Tests involve heavy use of LD_PRELOAD in some cases
# This isn't compatible with sandbox
RESTRICT="test"
LLVM_DEPS="
<sys-devel/llvm-$((${LLVM_MAX_SLOT} + 1)):=
|| (
"
# We go downwards as Portage prefers left-most in || ( .. )
for ((i=${LLVM_MAX_SLOT}; i >= ${LLVM_MIN_SLOT}; i--)) ; do
LLVM_DEPS+=" sys-devel/clang:${i}"
done
LLVM_DEPS+=" )"
unset i
RDEPEND="
${PYTHON_DEPS}
${LLVM_DEPS}
!app-forensics/afl
"
DEPEND="
${RDEPEND}
test? ( dev-util/cmocka )
"
QA_FLAGS_IGNORED="
usr/lib.*/afl/afl-gcc-cmplog-pass.so
usr/lib.*/afl/afl-gcc-cmptrs-pass.so
"
QA_PREBUILT="usr/share/afl/testcases/others/elf/small_exec.elf"
PATCHES=(
"${WORKDIR}"/${AFL_PATCHSET}
)
llvm_check_deps() {
has_version -b "sys-devel/clang:${LLVM_SLOT}" && \
has_version -b "sys-devel/llvm:${LLVM_SLOT}"
}
pkg_setup() {
llvm_pkg_setup
python-single-r1_pkg_setup
}
mymake() {
# afl-fuzz spews garbage to stdout if the environment contains any
# variables whose name beginning with USE_ (including the underscore),
# regardless of their value (even if empty!). The ebuild environment
# contains several such variables and the garbage that gets printed
# ends up in the generated man page.
#
# We can work around the problem by unsetting all these variables when
# running make.
local badvars=("${!USE_@}")
env "${badvars[@]/#/-u}" emake \
CC="$(tc-getCC)" \
CXX="$(tc-getCXX)" \
CFLAGS_FLTO="" \
LLVM_CONFIG="$(get_llvm_prefix ${LLVM_MAX_SLOT})"/bin/llvm-config \
PREFIX="${EPREFIX}/usr" \
HELPER_PATH="${EPREFIX}/usr/$(get_libdir)/afl" \
DOC_PATH="${EPREFIX}/usr/share/doc/${PF}" \
MAN_PATH="${EPREFIX}/usr/share/man/man8" \
"$@"
}
src_compile() {
mymake
}
src_test() {
mymake test
}
src_install() {
mymake DESTDIR="${D}" install
dostrip -x /usr/share/afl/testcases/
}
pkg_postinst() {
# TODO: Any others?
optfeature "fuzzing with AFL_USE_ASAN" sys-libs/compiler-rt-sanitizers[asan]
optfeature "fuzzing with AFL_USE_MSAN" sys-libs/compiler-rt-sanitizers[msan]
}
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