From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- xpcom/base/LogModulePrefWatcher.cpp | 164 ++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 xpcom/base/LogModulePrefWatcher.cpp (limited to 'xpcom/base/LogModulePrefWatcher.cpp') diff --git a/xpcom/base/LogModulePrefWatcher.cpp b/xpcom/base/LogModulePrefWatcher.cpp new file mode 100644 index 0000000000..bd06660533 --- /dev/null +++ b/xpcom/base/LogModulePrefWatcher.cpp @@ -0,0 +1,164 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "LogModulePrefWatcher.h" + +#include "mozilla/Logging.h" +#include "mozilla/Preferences.h" +#include "mozilla/Services.h" +#include "nsIObserverService.h" +#include "nsString.h" +#include "nsXULAppAPI.h" +#include "base/process_util.h" + +static const char kLoggingPrefPrefix[] = "logging."; +static const char kLoggingConfigPrefPrefix[] = "logging.config"; +static const int kLoggingConfigPrefixLen = sizeof(kLoggingConfigPrefPrefix) - 1; +static const char kLoggingPrefClearOnStartup[] = + "logging.config.clear_on_startup"; +static const char kLoggingPrefLogFile[] = "logging.config.LOG_FILE"; +static const char kLoggingPrefAddTimestamp[] = "logging.config.add_timestamp"; +static const char kLoggingPrefSync[] = "logging.config.sync"; +static const char kLoggingPrefStacks[] = "logging.config.profilerstacks"; + +namespace mozilla { + +NS_IMPL_ISUPPORTS(LogModulePrefWatcher, nsIObserver) + +/** + * Resets all the preferences in the logging. branch + * This is needed because we may crash while logging, and this would cause us + * to log after restarting as well. + * + * If logging after restart is desired, set the logging.config.clear_on_startup + * pref to false, or use the MOZ_LOG_FILE and MOZ_LOG_MODULES env vars. + */ +static void ResetExistingPrefs() { + nsTArray names; + nsresult rv = + Preferences::GetRootBranch()->GetChildList(kLoggingPrefPrefix, names); + if (NS_SUCCEEDED(rv)) { + for (auto& name : names) { + // Clearing the pref will cause it to reload, thus resetting the log level + Preferences::ClearUser(name.get()); + } + } +} + +/** + * Loads the log level from the given pref and updates the corresponding + * LogModule. + */ +static void LoadPrefValue(const char* aName) { + LogLevel logLevel = LogLevel::Disabled; + + nsresult rv; + int32_t prefLevel = 0; + nsAutoCString prefValue; + + if (strncmp(aName, kLoggingConfigPrefPrefix, kLoggingConfigPrefixLen) == 0) { + nsAutoCString prefName(aName); + + if (prefName.EqualsLiteral(kLoggingPrefLogFile)) { + rv = Preferences::GetCString(aName, prefValue); + // The pref was reset. Clear the user file. + if (NS_FAILED(rv) || prefValue.IsEmpty()) { + LogModule::SetLogFile(nullptr); + return; + } + + // If the pref value doesn't have a PID placeholder, append it to the end. + if (!strstr(prefValue.get(), MOZ_LOG_PID_TOKEN)) { + prefValue.AppendLiteral(MOZ_LOG_PID_TOKEN); + } + + LogModule::SetLogFile(prefValue.BeginReading()); + } else if (prefName.EqualsLiteral(kLoggingPrefAddTimestamp)) { + bool addTimestamp = Preferences::GetBool(aName, false); + LogModule::SetAddTimestamp(addTimestamp); + } else if (prefName.EqualsLiteral(kLoggingPrefSync)) { + bool sync = Preferences::GetBool(aName, false); + LogModule::SetIsSync(sync); + } else if (prefName.EqualsLiteral(kLoggingPrefStacks)) { + bool captureStacks = Preferences::GetBool(aName, false); + LogModule::SetCaptureStacks(captureStacks); + } + return; + } + + if (Preferences::GetInt(aName, &prefLevel) == NS_OK) { + logLevel = ToLogLevel(prefLevel); + } else if (Preferences::GetCString(aName, prefValue) == NS_OK) { + if (prefValue.LowerCaseEqualsLiteral("error")) { + logLevel = LogLevel::Error; + } else if (prefValue.LowerCaseEqualsLiteral("warning")) { + logLevel = LogLevel::Warning; + } else if (prefValue.LowerCaseEqualsLiteral("info")) { + logLevel = LogLevel::Info; + } else if (prefValue.LowerCaseEqualsLiteral("debug")) { + logLevel = LogLevel::Debug; + } else if (prefValue.LowerCaseEqualsLiteral("verbose")) { + logLevel = LogLevel::Verbose; + } + } + + const char* moduleName = aName + strlen(kLoggingPrefPrefix); + LogModule::Get(moduleName)->SetLevel(logLevel); +} + +static void LoadExistingPrefs() { + nsIPrefBranch* root = Preferences::GetRootBranch(); + if (!root) { + return; + } + + nsTArray names; + nsresult rv = root->GetChildList(kLoggingPrefPrefix, names); + if (NS_SUCCEEDED(rv)) { + for (auto& name : names) { + LoadPrefValue(name.get()); + } + } +} + +LogModulePrefWatcher::LogModulePrefWatcher() = default; + +void LogModulePrefWatcher::RegisterPrefWatcher() { + RefPtr prefWatcher = new LogModulePrefWatcher(); + Preferences::AddStrongObserver(prefWatcher, kLoggingPrefPrefix); + + nsCOMPtr observerService = + mozilla::services::GetObserverService(); + if (observerService && XRE_IsParentProcess()) { + observerService->AddObserver(prefWatcher, + "browser-delayed-startup-finished", false); + } + + LoadExistingPrefs(); +} + +NS_IMETHODIMP +LogModulePrefWatcher::Observe(nsISupports* aSubject, const char* aTopic, + const char16_t* aData) { + if (strcmp(NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, aTopic) == 0) { + NS_LossyConvertUTF16toASCII prefName(aData); + LoadPrefValue(prefName.get()); + } else if (strcmp("browser-delayed-startup-finished", aTopic) == 0) { + bool clear = Preferences::GetBool(kLoggingPrefClearOnStartup, true); + if (clear) { + ResetExistingPrefs(); + } + nsCOMPtr observerService = + mozilla::services::GetObserverService(); + if (observerService) { + observerService->RemoveObserver(this, "browser-delayed-startup-finished"); + } + } + + return NS_OK; +} + +} // namespace mozilla -- cgit v1.2.3