1# Copyright 2020 The Chromium Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5# A fuzzable_proto_library is a proto_library that is the same as any other in 6# non-fuzzer builds (ie: use_libfuzzer=false). However, in fuzzer builds, the 7# proto_library is built with the full protobuf runtime and any "optimize_for = 8# LITE_RUNTIME" options are ignored. This is done because libprotobuf-mutator 9# needs the full protobuf runtime, but proto_libraries shipped in Chrome must 10# use the optimize for LITE_RUNTIME option which is incompatible with the full 11# protobuf runtime. tl;dr: A fuzzable_proto_library is a proto_library that can 12# be fuzzed with libprotobuf-mutator and shipped in Chrome. 13 14import("//build_overrides/build.gni") 15import("//testing/libfuzzer/fuzzer_test.gni") 16import("//third_party/protobuf/proto_library.gni") 17 18template("fuzzable_proto_library") { 19 if (use_libfuzzer) { 20 proto_library("proto_library_" + target_name) { 21 forward_variables_from(invoker, "*") 22 assert(current_toolchain == host_toolchain) 23 24 cc_generator_options = "speed" 25 extra_configs = [ "//third_party/protobuf:protobuf_config" ] 26 } 27 28 # Inspired by proto_library.gni's handling of 29 # component_build_force_source_set. 30 if (defined(component_build_force_source_set) && 31 component_build_force_source_set && is_component_build) { 32 link_target_type = "source_set" 33 } else { 34 link_target_type = "static_library" 35 } 36 37 # By making target a static_library or source_set, we can add protobuf_full 38 # to public_deps. 39 target(link_target_type, target_name) { 40 if (defined(invoker.testonly)) { 41 testonly = invoker.testonly 42 } 43 sources = [ "//third_party/libprotobuf-mutator/dummy.cc" ] 44 public_deps = [ 45 ":proto_library_" + target_name, 46 "//third_party/libprotobuf-mutator:protobuf_full", 47 ] 48 } 49 } else { 50 # fuzzable_proto_library should behave like a proto_library when 51 # !use_libfuzzer. 52 proto_library(target_name) { 53 forward_variables_from(invoker, "*") 54 } 55 } 56} 57