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112 lines
3.8 KiB
Plaintext
112 lines
3.8 KiB
Plaintext
# Copyright 2017 The Chromium Authors. All rights reserved.
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import("//build/config/sanitizers/sanitizers.gni")
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import("//testing/libfuzzer/fuzzer_test.gni")
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import("//third_party/libprotobuf-mutator/fuzzable_proto_library.gni")
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config("include_config") {
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include_dirs = [ "src/" ]
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}
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source_set("libprotobuf-mutator") {
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testonly = true
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# Dont allow building on windows to avoid tryjob failure. This is OK since
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# libFuzzer doesn't build on windows anyway.
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if (!is_win) {
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configs += [ ":include_config" ]
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# Remove *San and coverage for a performance boost.
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configs -= not_fuzzed_remove_configs
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configs += [ "//build/config/sanitizers:not_fuzzed" ]
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public_configs = [ ":include_config" ]
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sources = [
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"src/src/binary_format.cc",
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"src/src/libfuzzer/libfuzzer_macro.cc",
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"src/src/libfuzzer/libfuzzer_mutator.cc",
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"src/src/mutator.cc",
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"src/src/text_format.cc",
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"src/src/utf8_fix.cc",
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]
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# Allow users of LPM to use protobuf reflection and other features from
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# protobuf_full.
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public_deps = [
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"//third_party/protobuf:protobuf_full",
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]
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# Let ClusterFuzz builders know to not build targets that depend on
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# libprotobuf-mutator for AFL.
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if (use_afl) {
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all_dependent_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
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}
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}
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}
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# This protoc plugin, like the compiler, should only be built for the host
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# architecture.
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if (current_toolchain == host_toolchain) {
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# This plugin will be needed to fuzz most protobuf code in Chromium. That's
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# because production protobuf code must contain the line:
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# "option optimize_for = LITE_RUNTIME", which instructs the proto compiler not
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# to compile the proto using the full protobuf runtime. This allows Chromium
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# not to depend on the full protobuf library, but prevents
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# libprotobuf-mutator from fuzzing because the lite runtime lacks needed
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# features (such as reflection). The plugin simply compiles a proto library
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# as normal but ensures that is compiled with the full protobuf runtime.
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executable("override_lite_runtime_plugin") {
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sources = [
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"protoc_plugin/protoc_plugin.cc",
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]
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deps = [
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"//third_party/protobuf:protoc_lib",
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]
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public_configs = [ "//third_party/protobuf:protobuf_config" ]
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}
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# To use the plugin in a proto_library you want to fuzz, change the build
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# target to fuzzable_proto_library (defined in
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# //third_party/libprotobuf-mutator/fuzzable_proto_library.gni)
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}
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# The CQ will try building this target without "use_libfuzzer" if it is defined.
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# That will cause the build to fail, so don't define it when "use_libfuzzer" is
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# is false.
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if (use_libfuzzer) {
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# Test that override_lite_runtime_plugin is working when built. This target
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# contains files that are optimized for LITE_RUNTIME and which import other
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# files that are also optimized for LITE_RUNTIME.
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fuzzer_test("override_lite_runtime_plugin_test_fuzzer") {
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sources = [
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"protoc_plugin/test_fuzzer.cc",
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]
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deps = [
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":libprotobuf-mutator",
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":override_lite_runtime_plugin_test_fuzzer_proto",
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]
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# Don't actually run this on CF. It's only a test to ensure builds work.
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additional_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
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}
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}
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# Proto library for override_lite_runtime_plugin_test_fuzzer
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fuzzable_proto_library("override_lite_runtime_plugin_test_fuzzer_proto") {
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sources = [
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"protoc_plugin/imported.proto",
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"protoc_plugin/imported_publicly.proto",
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"protoc_plugin/test_fuzzer_input.proto",
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]
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}
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# Avoid CQ complaints on platforms we don't care about (ie: iOS).
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# Also prevent people from using this to include protobuf_full into a production
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# build of Chrome.
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if (use_libfuzzer) {
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# Component that can provide protobuf_full to non-testonly targets
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static_library("protobuf_full") {
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public_deps = [
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"//third_party/protobuf:protobuf_full",
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]
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}
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}
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