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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.
#include <windows.h>
#include <time.h>
#include "base/files/file_path.h"
#include "base/strings/stringprintf.h"
#include "chrome/common/chrome_version_info_values.h"
#include "chrome/tools/crash_service/caps/logger_win.h"
namespace {
// Every message has this structure:
// <index>~ <tick_count> <message> ~\n"
const char kMessageHeader[] = "%03d~ %08x %s ~\n";
// Do not re-order these messages. Only add at the end.
const char* kMessages[] {
"start pid(%lu) version(%s) time(%s)", // 0
"exit pid(%lu) time(%s)", // 1
"instance found", // 2
};
bool WriteLogLine(HANDLE file, const std::string& txt) {
if (txt.empty())
return true;
DWORD written;
auto rc = ::WriteFile(file, txt.c_str(),
static_cast<DWORD>(txt.size()),
&written,
nullptr);
return (rc == TRUE);
}
// Uses |kMessages| at |index| above to write to disk a formatted log line.
bool WriteFormattedLogLine(HANDLE file, size_t index, ...) {
va_list ap;
va_start(ap, index);
auto fmt = base::StringPrintf(
kMessageHeader, index, ::GetTickCount(), kMessages[index]);
auto msg = base::StringPrintV(fmt.c_str(), ap);
auto rc = WriteLogLine(file, msg.c_str());
va_end(ap);
return rc;
}
// Returns the current time and date formatted in standard C style.
std::string DateTime() {
time_t current_time = 0;
time(¤t_time);
struct tm local_time = {0};
char time_buf[26] = {0};
localtime_s(&local_time, ¤t_time);
asctime_s(time_buf, &local_time);
time_buf[24] = '\0';
return time_buf;
}
} // namespace
namespace caps {
Logger::Logger(const base::FilePath& path) : file_(INVALID_HANDLE_VALUE) {
auto logfile = path.Append(L"caps_log.txt");
// Opening a file like so allows atomic appends, but can't be used
// for anything else.
DWORD kShareAll = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
file_ = ::CreateFile(logfile.value().c_str(),
FILE_APPEND_DATA, kShareAll,
nullptr,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL,
nullptr);
if (file_ == INVALID_HANDLE_VALUE)
return;
WriteFormattedLogLine(
file_, 0, ::GetCurrentProcessId(), PRODUCT_VERSION, DateTime().c_str());
}
Logger::~Logger() {
if (file_ != INVALID_HANDLE_VALUE) {
WriteFormattedLogLine(
file_, 1, ::GetCurrentProcessId(), DateTime().c_str());
::CloseHandle(file_);
}
}
} // namespace caps
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