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- // Copyright 2016 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 "base/syslog_logging.h"
- #include "build/build_config.h"
- #if BUILDFLAG(IS_WIN)
- #include <windows.h>
- #include <sddl.h>
- #include "base/debug/stack_trace.h"
- #include "base/strings/string_util.h"
- #include "base/win/scoped_handle.h"
- #include "base/win/win_util.h"
- #elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
- // <syslog.h> defines LOG_INFO, LOG_WARNING macros that could conflict with
- // base::LOG_INFO, base::LOG_WARNING.
- #include <syslog.h>
- #undef LOG_INFO
- #undef LOG_WARNING
- #endif
- #include <ostream>
- #include <string>
- namespace logging {
- namespace {
- // The syslog logging is on by default, but tests or fuzzers can disable it.
- bool g_logging_enabled = true;
- } // namespace
- #if BUILDFLAG(IS_WIN)
- namespace {
- std::string* g_event_source_name = nullptr;
- uint16_t g_category = 0;
- uint32_t g_event_id = 0;
- std::wstring* g_user_sid = nullptr;
- class EventLogHandleTraits {
- public:
- using Handle = HANDLE;
- EventLogHandleTraits() = delete;
- EventLogHandleTraits(const EventLogHandleTraits&) = delete;
- EventLogHandleTraits& operator=(const EventLogHandleTraits&) = delete;
- // Closes the handle.
- static bool CloseHandle(HANDLE handle) {
- return ::DeregisterEventSource(handle) != FALSE;
- }
- // Returns true if the handle value is valid.
- static bool IsHandleValid(HANDLE handle) { return handle != nullptr; }
- // Returns null handle value.
- static HANDLE NullHandle() { return nullptr; }
- };
- using ScopedEventLogHandle =
- base::win::GenericScopedHandle<EventLogHandleTraits,
- base::win::DummyVerifierTraits>;
- } // namespace
- void SetEventSource(const std::string& name,
- uint16_t category,
- uint32_t event_id) {
- DCHECK_EQ(nullptr, g_event_source_name);
- g_event_source_name = new std::string(name);
- g_category = category;
- g_event_id = event_id;
- DCHECK_EQ(nullptr, g_user_sid);
- g_user_sid = new std::wstring();
- base::win::GetUserSidString(g_user_sid);
- }
- void ResetEventSourceForTesting() {
- delete g_event_source_name;
- g_event_source_name = nullptr;
- delete g_user_sid;
- g_user_sid = nullptr;
- }
- #endif // BUILDFLAG(IS_WIN)
- EventLogMessage::EventLogMessage(const char* file,
- int line,
- LogSeverity severity)
- : log_message_(file, line, severity) {
- }
- EventLogMessage::~EventLogMessage() {
- if (!g_logging_enabled)
- return;
- #if BUILDFLAG(IS_WIN)
- // If g_event_source_name is nullptr (which it is per default) SYSLOG will
- // degrade gracefully to regular LOG. If you see this happening most probably
- // you are using SYSLOG before you called SetEventSourceName.
- if (g_event_source_name == nullptr)
- return;
- ScopedEventLogHandle event_log_handle(
- RegisterEventSourceA(nullptr, g_event_source_name->c_str()));
- if (!event_log_handle.is_valid()) {
- stream() << " !!NOT ADDED TO EVENTLOG!!";
- return;
- }
- std::string message(log_message_.str());
- WORD log_type = EVENTLOG_ERROR_TYPE;
- switch (log_message_.severity()) {
- case LOGGING_INFO:
- log_type = EVENTLOG_INFORMATION_TYPE;
- break;
- case LOGGING_WARNING:
- log_type = EVENTLOG_WARNING_TYPE;
- break;
- case LOGGING_ERROR:
- case LOGGING_FATAL:
- // The price of getting the stack trace is not worth the hassle for
- // non-error conditions.
- base::debug::StackTrace trace;
- message.append(trace.ToString());
- log_type = EVENTLOG_ERROR_TYPE;
- break;
- }
- LPCSTR strings[1] = {message.data()};
- PSID user_sid = nullptr;
- if (!::ConvertStringSidToSid(g_user_sid->c_str(), &user_sid)) {
- stream() << " !!ERROR GETTING USER SID!!";
- }
- if (!ReportEventA(event_log_handle.get(), log_type, g_category, g_event_id,
- user_sid, 1, 0, strings, nullptr)) {
- stream() << " !!NOT ADDED TO EVENTLOG!!";
- }
- if (user_sid != nullptr)
- ::LocalFree(user_sid);
- #elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
- const char kEventSource[] = "chrome";
- openlog(kEventSource, LOG_NOWAIT | LOG_PID, LOG_USER);
- // We can't use the defined names for the logging severity from syslog.h
- // because they collide with the names of our own severity levels. Therefore
- // we use the actual values which of course do not match ours.
- // See sys/syslog.h for reference.
- int priority = 3;
- switch (log_message_.severity()) {
- case LOGGING_INFO:
- priority = 6;
- break;
- case LOGGING_WARNING:
- priority = 4;
- break;
- case LOGGING_ERROR:
- priority = 3;
- break;
- case LOGGING_FATAL:
- priority = 2;
- break;
- }
- syslog(priority, "%s", log_message_.str().c_str());
- closelog();
- #endif // BUILDFLAG(IS_WIN)
- }
- void SetSyslogLoggingForTesting(bool logging_enabled) {
- g_logging_enabled = logging_enabled;
- }
- } // namespace logging
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