| # Copyright 2018 The Chromium OS Authors. All rights reserved. |
| # Distributed under the terms of the GNU General Public License v2. |
| |
| # @ECLASS: cros-sanitizers.eclass |
| # @MAINTAINER: |
| # ChromeOS toolchain team <chromeos-toolchain@google.com> |
| # @DESCRIPTION: |
| # Ebuild helper functions for sanitizer builds on Chrome OS. |
| |
| if [[ -z ${_CROS_SANITIZER_ECLASS} ]]; then |
| _CROS_SANITIZER_ECLASS=1 |
| |
| inherit flag-o-matic toolchain-funcs |
| |
| IUSE="asan coverage fuzzer msan ubsan" |
| |
| # @FUNCTION: coverage-setup-env |
| # @DESCRIPTION: |
| # Build a package with coverage flags. |
| coverage-setup-env() { |
| use coverage || return 0 |
| append-flags -fprofile-instr-generate -fcoverage-mapping |
| append-ldflags -fprofile-instr-generate -fcoverage-mapping |
| } |
| |
| # @FUNCTION: msan-setup-env |
| # @DESCRIPTION: |
| # Build a package with memory sanitizer flags. |
| msan-setup-env() { |
| use msan || return 0 |
| append-flags "-fsanitize=memory" |
| append-ldflags "-fsanitize=memory" |
| } |
| |
| # @FUNCTION: ubsan-setup-env |
| # @DESCRIPTION: |
| # Build a package with undefined behavior sanitizer flags. |
| ubsan-setup-env() { |
| use ubsan || return 0 |
| local flags=( |
| -fsanitize=alignment,array-bounds,shift,vla-bound |
| -fno-sanitize=vptr |
| -fno-sanitize-recover=all |
| ) |
| append-flags "${flags[@]}" |
| append-ldflags "${flags[@]}" |
| } |
| |
| # @FUNCTION: sanitizers-setup-env |
| # @DESCRIPTION: |
| # Build a package with required sanitizer flags. |
| sanitizers-setup-env() { |
| asan-setup-env |
| coverage-setup-env |
| if [[ $(type -t fuzzer-setup-env) == "function" ]] ; then |
| # Only run this if we've inherited cros-fuzzer.eclass. |
| fuzzer-setup-env |
| fi |
| msan-setup-env |
| ubsan-setup-env |
| } |
| |
| # @FUNCTION: use_sanitizers |
| # @DESCRIPTION: |
| # Checks whether sanitizers are being used. |
| # Also returns a true/false value when passed as arguments. |
| # Usage: use_sanitizers [trueVal] [falseVal] |
| use_sanitizers() { |
| if use asan || use coverage || use fuzzer || use msan || use ubsan; then |
| [[ "$#" -eq 2 ]] && echo "$1" |
| return 0 |
| fi |
| |
| [[ "$#" -eq 2 ]] && echo "$2" |
| return 1 |
| } |
| |
| fi |