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- // Copyright 2018 Google
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
-
- #import "Private/GULLogger.h"
-
- #include <asl.h>
-
- #import <GoogleUtilities/GULAppEnvironmentUtil.h>
- #import <GoogleUtilities/GULLoggerLevel.h>
-
- /// ASL client facility name used by GULLogger.
- const char *kGULLoggerASLClientFacilityName = "com.google.utilities.logger";
-
- static dispatch_once_t sGULLoggerOnceToken;
-
- static aslclient sGULLoggerClient;
-
- static dispatch_queue_t sGULClientQueue;
-
- static BOOL sGULLoggerDebugMode;
-
- static GULLoggerLevel sGULLoggerMaximumLevel;
-
- // Allow clients to register a version to include in the log.
- static const char *sVersion = "";
-
- static GULLoggerService kGULLoggerLogger = @"[GULLogger]";
-
- #ifdef DEBUG
- /// The regex pattern for the message code.
- static NSString *const kMessageCodePattern = @"^I-[A-Z]{3}[0-9]{6}$";
- static NSRegularExpression *sMessageCodeRegex;
- #endif
-
- void GULLoggerInitializeASL(void) {
- dispatch_once(&sGULLoggerOnceToken, ^{
- NSInteger majorOSVersion = [[GULAppEnvironmentUtil systemVersion] integerValue];
- uint32_t aslOptions = ASL_OPT_STDERR;
- #if TARGET_OS_SIMULATOR
- // The iOS 11 simulator doesn't need the ASL_OPT_STDERR flag.
- if (majorOSVersion >= 11) {
- aslOptions = 0;
- }
- #else
- // Devices running iOS 10 or higher don't need the ASL_OPT_STDERR flag.
- if (majorOSVersion >= 10) {
- aslOptions = 0;
- }
- #endif // TARGET_OS_SIMULATOR
-
- #pragma clang diagnostic push
- #pragma clang diagnostic ignored "-Wdeprecated-declarations" // asl is deprecated
- // Initialize the ASL client handle.
- sGULLoggerClient = asl_open(NULL, kGULLoggerASLClientFacilityName, aslOptions);
- sGULLoggerMaximumLevel = GULLoggerLevelNotice;
-
- // Set the filter used by system/device log. Initialize in default mode.
- asl_set_filter(sGULLoggerClient, ASL_FILTER_MASK_UPTO(ASL_LEVEL_NOTICE));
-
- sGULClientQueue = dispatch_queue_create("GULLoggingClientQueue", DISPATCH_QUEUE_SERIAL);
- dispatch_set_target_queue(sGULClientQueue,
- dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0));
- #ifdef DEBUG
- sMessageCodeRegex = [NSRegularExpression regularExpressionWithPattern:kMessageCodePattern
- options:0
- error:NULL];
- #endif
- });
- }
-
- void GULLoggerEnableSTDERR(void) {
- asl_add_log_file(sGULLoggerClient, STDERR_FILENO);
- }
-
- void GULLoggerForceDebug(void) {
- // We should enable debug mode if we're not running from App Store.
- if (![GULAppEnvironmentUtil isFromAppStore]) {
- sGULLoggerDebugMode = YES;
- GULSetLoggerLevel(GULLoggerLevelDebug);
- }
- }
-
- __attribute__((no_sanitize("thread"))) void GULSetLoggerLevel(GULLoggerLevel loggerLevel) {
- if (loggerLevel < GULLoggerLevelMin || loggerLevel > GULLoggerLevelMax) {
- GULLogError(kGULLoggerLogger, NO, @"I-COR000023", @"Invalid logger level, %ld",
- (long)loggerLevel);
- return;
- }
- GULLoggerInitializeASL();
- // We should not raise the logger level if we are running from App Store.
- if (loggerLevel >= GULLoggerLevelNotice && [GULAppEnvironmentUtil isFromAppStore]) {
- return;
- }
-
- sGULLoggerMaximumLevel = loggerLevel;
- dispatch_async(sGULClientQueue, ^{
- asl_set_filter(sGULLoggerClient, ASL_FILTER_MASK_UPTO(loggerLevel));
- });
- }
-
- /**
- * Check if the level is high enough to be loggable.
- */
- __attribute__((no_sanitize("thread"))) BOOL GULIsLoggableLevel(GULLoggerLevel loggerLevel) {
- GULLoggerInitializeASL();
- if (sGULLoggerDebugMode) {
- return YES;
- }
- return (BOOL)(loggerLevel <= sGULLoggerMaximumLevel);
- }
-
- #ifdef DEBUG
- void GULResetLogger() {
- sGULLoggerOnceToken = 0;
- }
-
- aslclient getGULLoggerClient() {
- return sGULLoggerClient;
- }
-
- dispatch_queue_t getGULClientQueue() {
- return sGULClientQueue;
- }
-
- BOOL getGULLoggerDebugMode() {
- return sGULLoggerDebugMode;
- }
- #endif
-
- void GULLoggerRegisterVersion(const char *version) {
- sVersion = version;
- }
-
- void GULLogBasic(GULLoggerLevel level,
- GULLoggerService service,
- BOOL forceLog,
- NSString *messageCode,
- NSString *message,
- va_list args_ptr) {
- GULLoggerInitializeASL();
- if (!(level <= sGULLoggerMaximumLevel || sGULLoggerDebugMode || forceLog)) {
- return;
- }
-
- #ifdef DEBUG
- NSCAssert(messageCode.length == 11, @"Incorrect message code length.");
- NSRange messageCodeRange = NSMakeRange(0, messageCode.length);
- NSUInteger numberOfMatches = [sMessageCodeRegex numberOfMatchesInString:messageCode
- options:0
- range:messageCodeRange];
- NSCAssert(numberOfMatches == 1, @"Incorrect message code format.");
- #endif
- NSString *logMsg;
- if (args_ptr == NULL) {
- logMsg = message;
- } else {
- logMsg = [[NSString alloc] initWithFormat:message arguments:args_ptr];
- }
- logMsg = [NSString stringWithFormat:@"%s - %@[%@] %@", sVersion, service, messageCode, logMsg];
- dispatch_async(sGULClientQueue, ^{
- asl_log(sGULLoggerClient, NULL, (int)level, "%s", logMsg.UTF8String);
- });
- }
- #pragma clang diagnostic pop
-
- /**
- * Generates the logging functions using macros.
- *
- * Calling GULLogError(kGULLoggerCore, @"I-COR000001", @"Configure %@ failed.", @"blah") shows:
- * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Error> [{service}][I-COR000001] Configure blah failed.
- * Calling GULLogDebug(kGULLoggerCore, @"I-COR000001", @"Configure succeed.") shows:
- * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Debug> [{service}][I-COR000001] Configure succeed.
- */
- #define GUL_LOGGING_FUNCTION(level) \
- void GULLog##level(GULLoggerService service, BOOL force, NSString *messageCode, \
- NSString *message, ...) { \
- va_list args_ptr; \
- va_start(args_ptr, message); \
- GULLogBasic(GULLoggerLevel##level, service, force, messageCode, message, args_ptr); \
- va_end(args_ptr); \
- }
-
- GUL_LOGGING_FUNCTION(Error)
- GUL_LOGGING_FUNCTION(Warning)
- GUL_LOGGING_FUNCTION(Notice)
- GUL_LOGGING_FUNCTION(Info)
- GUL_LOGGING_FUNCTION(Debug)
-
- #undef GUL_MAKE_LOGGER
-
- #pragma mark - GULLoggerWrapper
-
- @implementation GULLoggerWrapper
-
- + (void)logWithLevel:(GULLoggerLevel)level
- withService:(GULLoggerService)service
- withCode:(NSString *)messageCode
- withMessage:(NSString *)message
- withArgs:(va_list)args {
- GULLogBasic(level, service, NO, messageCode, message, args);
- }
-
- @end
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