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Diffstat (limited to 'third_party/libprotobuf-mutator/BUILD.gn')
-rw-r--r-- | third_party/libprotobuf-mutator/BUILD.gn | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/libprotobuf-mutator/BUILD.gn b/third_party/libprotobuf-mutator/BUILD.gn new file mode 100644 index 00000000..cc3eeaeb --- /dev/null +++ b/third_party/libprotobuf-mutator/BUILD.gn @@ -0,0 +1,87 @@ +# Copyright 2020 The Chromium Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +import("//build_overrides/build.gni") +import("//testing/libfuzzer/fuzzer_test.gni") +import("//third_party/libprotobuf-mutator/fuzzable_proto_library.gni") + +config("include_config") { + include_dirs = [ "src/" ] +} + +source_set("libprotobuf-mutator") { + testonly = true + + configs += [ ":include_config" ] + + public_configs = [ ":include_config" ] + sources = [ + "src/src/binary_format.cc", + "src/src/libfuzzer/libfuzzer_macro.cc", + "src/src/libfuzzer/libfuzzer_mutator.cc", + "src/src/mutator.cc", + "src/src/text_format.cc", + "src/src/utf8_fix.cc", + ] + + # Allow users of LPM to use protobuf reflection and other features from + # protobuf_full. + public_deps = [ "//third_party/protobuf:protobuf_full" ] +} + +# This protoc plugin, like the compiler, should only be built for the host +# architecture. +if (current_toolchain == host_toolchain) { + # This plugin will be needed to fuzz most protobuf code in Chromium. That's + # because production protobuf code must contain the line: + # "option optimize_for = LITE_RUNTIME", which instructs the proto compiler not + # to compile the proto using the full protobuf runtime. This allows Chromium + # not to depend on the full protobuf library, but prevents + # libprotobuf-mutator from fuzzing because the lite runtime lacks needed + # features (such as reflection). The plugin simply compiles a proto library + # as normal but ensures that is compiled with the full protobuf runtime. + executable("override_lite_runtime_plugin") { + sources = [ "protoc_plugin/protoc_plugin.cc" ] + deps = [ "//third_party/protobuf:protoc_lib" ] + public_configs = [ "//third_party/protobuf:protobuf_config" ] + } + # To use the plugin in a proto_library you want to fuzz, change the build + # target to fuzzable_proto_library (defined in + # //third_party/libprotobuf-mutator/fuzzable_proto_library.gni) +} + +# The CQ will try building this target without "use_libfuzzer" if it is defined. +# That will cause the build to fail, so don't define it when "use_libfuzzer" is +# is false. +if (use_libfuzzer) { + # Test that override_lite_runtime_plugin is working when built. This target + # contains files that are optimized for LITE_RUNTIME and which import other + # files that are also optimized for LITE_RUNTIME. + openscreen_fuzzer_test("override_lite_runtime_plugin_test_fuzzer") { + sources = [ "protoc_plugin/test_fuzzer.cc" ] + deps = [ + ":libprotobuf-mutator", + ":override_lite_runtime_plugin_test_fuzzer_proto", + ] + } +} + +# Proto library for override_lite_runtime_plugin_test_fuzzer +fuzzable_proto_library("override_lite_runtime_plugin_test_fuzzer_proto") { + sources = [ + "protoc_plugin/imported.proto", + "protoc_plugin/imported_publicly.proto", + "protoc_plugin/test_fuzzer_input.proto", + ] +} + +# Avoid CQ complaints on platforms we don't care about (ie: iOS). +# Also prevent people from using this to include protobuf_full into a production +# build of Chrome. +if (use_libfuzzer) { + # Component that can provide protobuf_full to non-testonly targets + static_library("protobuf_full") { + public_deps = [ "//third_party/protobuf:protobuf_full" ] + } +} |