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# Copyright 2015 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.
# Defines fuzzer_test.
#
import("//build_overrides/build.gni")
# fuzzer_test is used to define individual libfuzzer tests.
#
# Supported attributes:
# - (required) sources - fuzzer test source files
# - deps - test dependencies
# - libs - Additional libraries to link.
# - additional_configs - additional configs to be used for compilation
# - dict - a dictionary file for the fuzzer.
# - environment_variables - certain environment variables allowed for the
# fuzzer (AFL_DRIVER_DONT_DEFER is the only one allowed currently).
# - libfuzzer_options - options for the fuzzer (e.g. -close_fd_mask=N).
# - asan_options - AddressSanitizer options (e.g. allow_user_segv_handler=1).
# - msan_options - MemorySanitizer options.
# - ubsan_options - UndefinedBehaviorSanitizer options.
# - seed_corpus - a directory with seed corpus.
# - seed_corpus_deps - dependencies for generating the seed corpus.
#
# If use_libfuzzer gn flag is defined, then proper fuzzer would be build.
# Without use_libfuzzer or use_afl a unit-test style binary would be built on
# linux and the whole target is a no-op otherwise.
#
# The template wraps test() target with appropriate dependencies.
# If any test run-time options are present (dict or libfuzzer_options), then a
# config (.options file) file would be generated or modified in root output
# dir (next to test).
template("openscreen_fuzzer_test") {
if (is_clang && !build_with_chromium) {
assert(defined(invoker.sources), "Need sources in $target_name.")
test_deps = [ "//testing/libfuzzer:fuzzing_engine_main" ]
if (defined(invoker.seed_corpus) || defined(invoker.seed_corpuses)) {
assert(!(defined(invoker.seed_corpus) && defined(invoker.seed_corpuses)),
"Do not use both seed_corpus and seed_corpuses for $target_name.")
out = "$root_build_dir/$target_name" + "_seed_corpus.zip"
seed_corpus_deps = []
if (defined(invoker.seed_corpus_deps)) {
seed_corpus_deps += invoker.seed_corpus_deps
}
action(target_name + "_seed_corpus") {
script = "//testing/libfuzzer/archive_corpus.py"
args = [
"--output",
rebase_path(out, root_build_dir),
]
if (defined(invoker.seed_corpus)) {
args += [ rebase_path(invoker.seed_corpus, root_build_dir) ]
}
if (defined(invoker.seed_corpuses)) {
foreach(seed_corpus_path, invoker.seed_corpuses) {
args += [ rebase_path(seed_corpus_path, root_build_dir) ]
}
}
outputs = [ out ]
deps = [ "//testing/libfuzzer:seed_corpus" ] + seed_corpus_deps
}
test_deps += [ ":" + target_name + "_seed_corpus" ]
}
if (defined(invoker.dict) || defined(invoker.libfuzzer_options) ||
defined(invoker.asan_options) || defined(invoker.msan_options) ||
defined(invoker.ubsan_options) ||
defined(invoker.environment_variables)) {
if (defined(invoker.dict)) {
# Copy dictionary to output.
copy(target_name + "_dict_copy") {
sources = [ invoker.dict ]
outputs = [ "$root_build_dir/" + target_name + ".dict" ]
}
test_deps += [ ":" + target_name + "_dict_copy" ]
}
# Generate .options file.
config_file_name = target_name + ".options"
action(config_file_name) {
script = "//testing/libfuzzer/gen_fuzzer_config.py"
args = [
"--config",
rebase_path("$root_build_dir/" + config_file_name, root_build_dir),
]
if (defined(invoker.dict)) {
args += [
"--dict",
rebase_path("$root_build_dir/" + invoker.target_name + ".dict",
root_build_dir),
]
}
if (defined(invoker.libfuzzer_options)) {
args += [ "--libfuzzer_options" ]
args += invoker.libfuzzer_options
}
if (defined(invoker.asan_options)) {
args += [ "--asan_options" ]
args += invoker.asan_options
}
if (defined(invoker.msan_options)) {
args += [ "--msan_options" ]
args += invoker.msan_options
}
if (defined(invoker.ubsan_options)) {
args += [ "--ubsan_options" ]
args += invoker.ubsan_options
}
if (defined(invoker.environment_variables)) {
args += [ "--environment_variables" ]
args += invoker.environment_variables
}
outputs = [ "$root_build_dir/$config_file_name" ]
}
test_deps += [ ":" + config_file_name ]
}
executable(target_name) {
testonly = true
forward_variables_from(invoker, "*")
deps += test_deps
if (defined(invoker.additional_configs)) {
configs += invoker.additional_configs
}
configs += [ "//testing/libfuzzer:fuzzer_test_config" ]
if (defined(invoker.suppressed_configs)) {
configs -= invoker.suppressed_configs
}
if (defined(invoker.generated_sources)) {
sources += invoker.generated_sources
}
if (is_mac) {
sources += [ "//testing/libfuzzer/libfuzzer_exports_mac.h" ]
}
}
} else {
# noop on unsupported platforms.
# mark attributes as used.
not_needed(invoker, "*")
group(target_name) {
}
}
}
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