summaryrefslogtreecommitdiff
blob: 52b037500853795fd34d3ba684be33717aab1bf8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

PYTHON_COMPAT=( python3_{6..9} )
inherit check-reqs cmake flag-o-matic llvm llvm.org python-any-r1

DESCRIPTION="Compiler runtime libraries for clang (sanitizers & xray)"
HOMEPAGE="https://llvm.org/"

LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="$(ver_cut 1-3)"
KEYWORDS=""
IUSE="+clang test elibc_glibc"
# base targets
IUSE+=" +libfuzzer +memprof +profile +xray"
# sanitizer targets, keep in sync with config-ix.cmake
# NB: ubsan, scudo deliberately match two entries
SANITIZER_FLAGS=(
	asan dfsan lsan msan hwasan tsan ubsan safestack cfi scudo
	shadowcallstack gwp-asan
)
IUSE+=" ${SANITIZER_FLAGS[@]/#/+}"
REQUIRED_USE="
	|| ( ${SANITIZER_FLAGS[*]} libfuzzer profile xray )
	gwp-asan? ( scudo )
	ubsan? ( cfi )"
RESTRICT="!test? ( test ) !clang? ( test )"

CLANG_SLOT=${SLOT%%.*}
# llvm-6 for new lit options
DEPEND="
	>=sys-devel/llvm-6"
BDEPEND="
	>=dev-util/cmake-3.16
	clang? ( sys-devel/clang )
	elibc_glibc? ( net-libs/libtirpc )
	test? (
		!<sys-apps/sandbox-2.13
		$(python_gen_any_dep ">=dev-python/lit-5[\${PYTHON_USEDEP}]")
		=sys-devel/clang-${PV%_*}*:${CLANG_SLOT}
		sys-libs/compiler-rt:${SLOT}
	)
	${PYTHON_DEPS}"

LLVM_COMPONENTS=( compiler-rt )
LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support llvm/utils/unittest )
llvm.org_set_globals

PATCHES=(
	"${FILESDIR}/9999/compiler-rt-prefix-paths.patch"
)

python_check_deps() {
	use test || return 0
	has_version "dev-python/lit[${PYTHON_USEDEP}]"
}

check_space() {
	if use test; then
		local CHECKREQS_DISK_BUILD=11G
		check-reqs_pkg_pretend
	fi
}

pkg_pretend() {
	check_space
}

pkg_setup() {
	check_space
	llvm_pkg_setup
	python-any-r1_pkg_setup
}

src_prepare() {
	sed -i -e 's:-Werror::' lib/tsan/go/buildgo.sh || die

	local flag
	for flag in "${SANITIZER_FLAGS[@]}"; do
		if ! use "${flag}"; then
			local cmake_flag=${flag/-/_}
			sed -i -e "/COMPILER_RT_HAS_${cmake_flag^^}/s:TRUE:FALSE:" \
				cmake/config-ix.cmake || die
		fi
	done

	if use asan && ! use profile; then
		# TODO: fix these tests to be skipped upstream
		rm test/asan/TestCases/asan_and_llvm_coverage_test.cpp || die
	fi

	llvm.org_src_prepare
}

src_configure() {
	# pre-set since we need to pass it to cmake
	BUILD_DIR=${WORKDIR}/compiler-rt_build

	if use clang; then
		local -x CC=${CHOST}-clang
		local -x CXX=${CHOST}-clang++
		strip-unsupported-flags
	fi

	local flag want_sanitizer=OFF
	for flag in "${SANITIZER_FLAGS[@]}"; do
		if use "${flag}"; then
			want_sanitizer=ON
			break
		fi
	done

	local mycmakeargs=(
		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
		# use a build dir structure consistent with install
		# this makes it possible to easily deploy test-friendly clang
		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${SLOT}"

		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
		# builtins & crt installed by sys-libs/compiler-rt
		-DCOMPILER_RT_BUILD_BUILTINS=OFF
		-DCOMPILER_RT_BUILD_CRT=OFF
		-DCOMPILER_RT_BUILD_LIBFUZZER=$(usex libfuzzer)
		-DCOMPILER_RT_BUILD_MEMPROF=$(usex memprof)
		-DCOMPILER_RT_BUILD_PROFILE=$(usex profile)
		-DCOMPILER_RT_BUILD_SANITIZERS="${want_sanitizer}"
		-DCOMPILER_RT_BUILD_XRAY=$(usex xray)

		-DPython3_EXECUTABLE="${PYTHON}"
	)
	if use test; then
		mycmakeargs+=(
			-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
			-DLLVM_LIT_ARGS="$(get_lit_flags)"

			# they are created during src_test()
			-DCOMPILER_RT_TEST_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang"
			-DCOMPILER_RT_TEST_CXX_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang++"
		)

		# same flags are passed for build & tests, so we need to strip
		# them down to a subset supported by clang
		CC=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang \
		CXX=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang++ \
		strip-unsupported-flags
	fi

	if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
		mycmakeargs+=(
			# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
			# this allows adding arm64 support using SDK in EPREFIX
			-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
			# Set version based on the SDK in EPREFIX
			# This disables i386 for SDK >= 10.15
			# Will error if has_use tsan and SDK < 10.12
			-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
			# Use our libtool instead of looking it up with xcrun
			-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
		)
	fi

	cmake_src_configure

	if use test; then
		local sys_dir=( "${EPREFIX}"/usr/lib/clang/${SLOT}/lib/* )
		[[ -e ${sys_dir} ]] || die "Unable to find ${sys_dir}"
		[[ ${#sys_dir[@]} -eq 1 ]] || die "Non-deterministic compiler-rt install: ${sys_dir[*]}"

		# copy clang over since resource_dir is located relatively to binary
		# therefore, we can put our new libraries in it
		mkdir -p "${BUILD_DIR}"/lib/{llvm/${CLANG_SLOT}/{bin,$(get_libdir)},clang/${SLOT}/include} || die
		cp "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/bin/clang{,++} \
			"${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/bin/ || die
		cp "${EPREFIX}"/usr/lib/clang/${SLOT}/include/*.h \
			"${BUILD_DIR}"/lib/clang/${SLOT}/include/ || die
		cp "${sys_dir}"/*builtins*.a \
			"${BUILD_DIR}/lib/clang/${SLOT}/lib/${sys_dir##*/}/" || die
		# we also need LLVMgold.so for gold-based tests
		if [[ -f ${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so ]]; then
			ln -s "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so \
				"${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/$(get_libdir)/ || die
		fi
	fi
}

src_test() {
	# respect TMPDIR!
	local -x LIT_PRESERVES_TMP=1
	# disable sandbox to have it stop clobbering LD_PRELOAD
	local -x SANDBOX_ON=0
	# wipe LD_PRELOAD to make ASAN happy
	local -x LD_PRELOAD=

	cmake_build check-all
}