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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "base/process/launch.h"
#include "base/sanitizer_buildflags.h"
#include "base/strings/string_util.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
using testing::ContainsRegex;
// The UaF is not detected under UBSan, which happily runs the fuzzer forever.
#if !BUILDFLAG(IS_UBSAN) && !BUILDFLAG(IS_UBSAN_SECURITY)
base::FilePath FuzzerPath() {
base::FilePath out_dir;
base::PathService::Get(base::DIR_OUT_TEST_DATA_ROOT, &out_dir);
return out_dir.AppendASCII("stacktrace_test_fuzzer");
}
base::FilePath FuzzerInputPath(std::string_view input_file) {
base::FilePath src_dir;
base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &src_dir);
return src_dir.AppendASCII("testing/libfuzzer/tests/data")
.AppendASCII(input_file);
}
TEST(FuzzerStacktraceTest, SymbolizesUAF) {
base::CommandLine cmd(FuzzerPath());
cmd.AppendArgPath(FuzzerInputPath("uaf"));
std::string output;
EXPECT_FALSE(base::GetAppOutputAndError(cmd, &output)); // Target crashes.
// TODO(https://crbug.com/40948553): Get MSan fuzzer build to work and expect
// the correct output here.
#if defined(ADDRESS_SANITIZER)
constexpr std::string_view kOutput = R"(
ERROR: AddressSanitizer: heap-use-after-free on address 0x[0-9a-f]+.*
READ of size 4 at 0x[0-9a-f]+ thread T[0-9]+
#0 0x[0-9a-f]+ in TriggerUAF\(\) testing/libfuzzer/tests/stacktrace_test_fuzzer.cc:[0-9]+:[0-9]+
)";
EXPECT_THAT(output, ContainsRegex(
base::TrimWhitespaceASCII(kOutput, base::TRIM_ALL)));
#endif
}
#endif // !BUILDFLAG(IS_UBSAN) && !BUILDFLAG(IS_UBSAN_SECURITY)
} // namespace
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