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{ lib, stdenv, fetchurl, bash, flex, bison, valgrind }:
stdenv.mkDerivation rec {
pname = "lockdep";
# it would be nice to be able to pick a kernel version in sync with something
# else we already ship, but it seems userspace lockdep isn't very well maintained
# and appears broken in many kernel releases
version = "5.0.21";
fullver = "5.0.21";
src = fetchurl {
url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
sha256 = "1my2m9hvnvdrvzcg0fgqgaga59y2cd5zlpv7xrfj2nn98sjhglwq";
};
# ensure *this* kernel's userspace-headers are picked up before we
# fall back to those in glibc, as they will be from a mismatched
# kernel version
postPatch = ''
substituteInPlace tools/lib/lockdep/Makefile \
--replace 'CONFIG_INCLUDES =' $'CONFIG_INCLUDES = -I../../../usr/include\n#'
'';
nativeBuildInputs = [ flex bison ];
# Workaround build failure on -fno-common toolchains like upstream
# gcc-10. Otherwise build fails as:
# ld: lockdep.o:/build/linux-5.0.21/tools/lib/lockdep/../../include/linux/rcu.h:5: multiple definition of
# `rcu_scheduler_active'; common.o:/build/linux-5.0.21/tools/lib/lockdep/../../include/linux/rcu.h:5: first defined here
NIX_CFLAGS_COMPILE = "-fcommon";
buildPhase = ''
make defconfig
make headers_install
cd tools/lib/lockdep
make
'';
doCheck = true;
checkInputs = [ valgrind ];
checkPhase = ''
# there are more /bin/bash references than just shebangs
for f in lockdep run_tests.sh tests/*.sh; do
substituteInPlace $f \
--replace '/bin/bash' '${bash}/bin/bash'
done
./run_tests.sh
'';
installPhase = ''
mkdir -p $out/bin $out/lib $out/include
cp -R include/liblockdep $out/include
make install DESTDIR=$out prefix=""
substituteInPlace $out/bin/lockdep --replace "./liblockdep.so" "$out/lib/liblockdep.so.$fullver"
'';
meta = {
description = "Userspace locking validation tool built on the Linux kernel";
homepage = "https://kernel.org/";
license = lib.licenses.gpl2;
platforms = lib.platforms.linux;
maintainers = [ lib.maintainers.thoughtpolice ];
};
}
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