chrome/tools/perf/flush_cache/flush_cache.cc

// Copyright (c) 2006-2008 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.

// This little program attempts to flush the system cache for some files.
// It's useful for testing Chrome with a cold database.

#include "base/files/file_path.h"
#include "base/process/memory.h"
#include "base/test/test_file_util.h"

int main(int argc, const char* argv[]) {
  base::EnableTerminationOnHeapCorruption();
  if (argc <= 1) {
    fprintf(stderr, "flushes disk cache for files\n");
    fprintf(stderr, "usage: %s <filenames>\n", argv[0]);
    return 1;
  }

  for (int i = 1; i < argc; ++i) {
    base::FilePath path = base::FilePath::FromUTF8Unsafe(argv[i]);
    if (!file_util::EvictFileFromSystemCache(path)) {
      fprintf(stderr, "Failed to evict %s from cache -- is it a directory?\n",
              argv[i]);
    }
  }

  return 0;
}