Description
The SDK reports memory warning breadcrumbs by subscribing to the addObserverForName:UIApplicationDidReceiveMemoryWarningNotification
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[NSNotificationCenter.defaultCenter |
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addObserverForName:UIApplicationDidReceiveMemoryWarningNotification |
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object:nil |
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queue:nil |
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usingBlock:^(NSNotification *notification) { |
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if (nil != [SentrySDK.currentHub getClient]) { |
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SentryBreadcrumb *crumb = |
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[[SentryBreadcrumb alloc] initWithLevel:kSentryLevelWarning |
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category:@"device.event"]; |
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crumb.type = @"system"; |
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crumb.data = @ { @"action" : @"LOW_MEMORY" }; |
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crumb.message = @"Low memory"; |
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[SentrySDK addBreadcrumb:crumb]; |
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} |
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}]; |
With #2493 we now use a dispatch queue for a more fine grained approach
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const auto queueAttributes |
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= dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_UTILITY, 0); |
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_memoryWarningQueue = dispatch_queue_create("io.sentry.queue.memory-warnings", queueAttributes); |
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_memoryWarningSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, 0, |
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DISPATCH_MEMORYPRESSURE_NORMAL | DISPATCH_MEMORYPRESSURE_WARN |
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| DISPATCH_MEMORYPRESSURE_CRITICAL, |
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_memoryWarningQueue); |
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__weak auto weakSelf = self; |
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dispatch_source_set_event_handler(_memoryWarningSource, ^{ |
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const auto strongSelf = weakSelf; |
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if (!strongSelf) { |
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return; |
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} |
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handler(dispatch_source_get_data(strongSelf->_memoryWarningSource)); |
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}); |
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dispatch_resume(_memoryWarningSource); |
With that we could also create breadcrumbs for DISPATCH_MEMORYPRESSURE_NORMAL, DISPATCH_MEMORYPRESSURE_WARN, DISPATCH_MEMORYPRESSURE_CRITICA. Furthermore, we could add the currently available memory with
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- (mach_vm_size_t)memoryFootprintBytes:(NSError *__autoreleasing _Nullable *)error |
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{ |
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task_vm_info_data_t info; |
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mach_msg_type_number_t count = TASK_VM_INFO_COUNT; |
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const auto status = task_info(mach_task_self(), TASK_VM_INFO, (task_info_t)&info, &count); |
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if (status != KERN_SUCCESS) { |
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if (error) { |
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*error = NSErrorFromSentryErrorWithKernelError( |
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kSentryErrorKernel, @"task_info reported an error.", status); |
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} |
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return 0; |
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} |
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mach_vm_size_t footprintBytes; |
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if (count >= TASK_VM_INFO_REV1_COUNT) { |
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footprintBytes = info.phys_footprint; |
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} else { |
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footprintBytes = info.resident_size; |
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} |
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return footprintBytes; |
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} |
Thermal State
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- (void)registerStateChangeNotifications |
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{ |
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// According to Apple docs: "To receive NSProcessInfoThermalStateDidChangeNotification, you must |
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// access the thermalState prior to registering for the notification." (from |
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// https://developer.apple.com/documentation/foundation/nsprocessinfothermalstatedidchangenotification/) |
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[self recordThermalState]; |
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|
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[_processInfoWrapper monitorForThermalStateChanges:self callback:@selector(recordThermalState)]; |
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if (@available(macOS 12.0, *)) { |
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[_processInfoWrapper monitorForPowerStateChanges:self |
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callback:@selector(recordPowerLevelState)]; |
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} |
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} |