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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.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "base/metrics/persistent_histogram_allocator.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/persistent_memory_allocator.h"
struct Environment {
Environment() { logging::SetMinLogLevel(logging::LOGGING_FATAL); }
};
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
static Environment env;
// Copy data into a non-const vector.
std::vector<uint8_t> data_copy(data, data + size);
// PersistentMemoryAllocator segments must be aligned and an acceptable size.
if (!base::PersistentMemoryAllocator::IsMemoryAcceptable(
data_copy.data(), data_copy.size(), /*page_size=*/0,
/*readonly=*/false)) {
return 0;
}
std::unique_ptr<base::PersistentMemoryAllocator> memory_allocator =
std::make_unique<base::PersistentMemoryAllocator>(
data_copy.data(), data_copy.size(), /*page_size=*/0, /*id=*/0,
/*name=*/"",
/*access_mode=*/
base::FilePersistentMemoryAllocator::kReadWriteExisting);
std::unique_ptr<base::PersistentHistogramAllocator> histogram_allocator =
std::make_unique<base::PersistentHistogramAllocator>(
std::move(memory_allocator));
base::PersistentHistogramAllocator::Iterator hist_iter(
histogram_allocator.get());
while (true) {
std::unique_ptr<base::HistogramBase> histogram = hist_iter.GetNext();
if (!histogram) {
break;
}
histogram_allocator->MergeHistogramDeltaToStatisticsRecorder(
histogram.get());
}
return 0;
}
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