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// Copyright (c) 2009 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.
#include "chrome/browser/chromeos/boot_times_loader.h"
#include <vector>
#include "base/command_line.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "base/thread.h"
#include "chrome/browser/browser_process.h"
namespace chromeos {
// Beginning of line we look for that gives version number.
static const char kPrefix[] = "CHROMEOS_RELEASE_DESCRIPTION=";
// File to look for version number in.
static const char kVersionPath[] = "/etc/lsb-release";
// File uptime logs are located in.
static const char kLogPath[] = "/tmp";
BootTimesLoader::BootTimesLoader() : backend_(new Backend()) {
}
BootTimesLoader::Handle BootTimesLoader::GetBootTimes(
CancelableRequestConsumerBase* consumer,
BootTimesLoader::GetBootTimesCallback* callback) {
if (!g_browser_process->file_thread()) {
// This should only happen if Chrome is shutting down, so we don't do
// anything.
return 0;
}
scoped_refptr<CancelableRequest<GetBootTimesCallback> > request(
new CancelableRequest<GetBootTimesCallback>(callback));
AddRequest(request, consumer);
g_browser_process->file_thread()->message_loop()->PostTask(
FROM_HERE,
NewRunnableMethod(backend_.get(), &Backend::GetBootTimes, request));
return request->handle();
}
// Executes command within a shell, allowing IO redirection. Searches
// for a whitespace delimited string prefixed by prefix in the output and
// returns it.
static std::string ExecuteInShell(
const std::string& command, const std::string& prefix) {
std::vector<std::string> args;
args.push_back("/bin/sh");
args.push_back("-c");
args.push_back(command);
CommandLine cmd(args);
std::string out;
if (base::GetAppOutput(cmd, &out)) {
size_t index = out.find(prefix);
if (index != std::string::npos) {
size_t value_index = index + prefix.size();
size_t whitespace_index = out.find(' ', value_index);
size_t chars_left = std::string::npos;
if (whitespace_index == std::string::npos)
whitespace_index = out.find('\n', value_index);
if (whitespace_index != std::string::npos)
chars_left = whitespace_index - value_index;
return out.substr(value_index, chars_left);
}
}
return std::string();
}
// Extracts the uptime value from files located in /tmp, returning the
// value as a double in value.
static bool GetUptime(const std::string& log, double* value) {
FilePath log_dir(kLogPath);
FilePath log_file = log_dir.Append(log);
std::string contents;
*value = 0.0;
if (file_util::ReadFileToString(log_file, &contents)) {
size_t space_index = contents.find(' ');
size_t chars_left =
space_index != std::string::npos ? space_index : std::string::npos;
std::string value_string = contents.substr(0, chars_left);
return StringToDouble(value_string, value);
}
return false;
}
void BootTimesLoader::Backend::GetBootTimes(
scoped_refptr<GetBootTimesRequest> request) {
const char* kInitialTSCCommand = "dmesg | grep 'Initial TSC value:'";
const char* kInitialTSCPrefix = "TSC value: ";
const char* kClockSpeedCommand = "dmesg | grep -e 'Detected.*processor'";
const char* kClockSpeedPrefix = "Detected ";
const char* kPreStartup = "uptime-pre-startup";
const char* kChromeExec = "uptime-chrome-exec";
const char* kChromeMain = "uptime-chrome-main";
const char* kXStarted = "uptime-x-started";
const char* kLoginPromptReady = "uptime-login-prompt-ready";
if (request->canceled())
return;
// Wait until login_prompt_ready is output.
FilePath log_dir(kLogPath);
FilePath log_file = log_dir.Append(kLoginPromptReady);
while (!file_util::PathExists(log_file)) {
usleep(500000);
}
BootTimes boot_times;
std::string tsc_value = ExecuteInShell(kInitialTSCCommand, kInitialTSCPrefix);
std::string speed_value =
ExecuteInShell(kClockSpeedCommand, kClockSpeedPrefix);
boot_times.firmware = 0;
if (!tsc_value.empty() && !speed_value.empty()) {
int64 tsc = 0;
double speed = 0;
if (StringToInt64(tsc_value, &tsc) &&
StringToDouble(speed_value, &speed) &&
speed > 0) {
boot_times.firmware = static_cast<double>(tsc) / (speed * 1000000);
}
}
GetUptime(kPreStartup, &boot_times.pre_startup);
GetUptime(kXStarted, &boot_times.x_started);
GetUptime(kChromeExec, &boot_times.chrome_exec);
GetUptime(kChromeMain, &boot_times.chrome_main);
GetUptime(kLoginPromptReady, &boot_times.login_prompt_ready);
request->ForwardResult(
GetBootTimesCallback::TupleType(request->handle(), boot_times));
}
} // namespace chromeos
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