Osx

Getting current information Get current task with: #include <kern/task.h> task_t cur_task = current_task(); Get current thread with: ...

Get sleep notification in your IOKit kext IOReturn yourIOKitDriverClass::powerStateHandler(void *target, void *refCon, UInt32 messageType, IOService *service, void *messageArgs, vm_size_t argSize) { IOPMSystemCapabilityChangeParameters * params; if ( messageType != kIOMessageSystemCapabilityChange ) { // We are not interested in anything other than cap change. return kIOReturnSuccess; } params = (IOPMSystemCapabilityChangeParameters *) messageArgs; if ((params->changeFlags & kIOPMSystemCapabilityWillChange) && (params->fromCapabilities & kIOPMSystemCapabilityGraphics) && (params->toCapabilities & kIOPMSystemCapabilityGraphics) == 0) { // caught a sleep } return kIOReturnSuccess; } bool yourIOKitDriverClass::start(IOService *provider) { IOService *rootDomain = (IOService *)getPMRootDomain(); if (rootDomain) rootDomain->registerInterestedDriver(this); registerPrioritySleepWakeInterest(powerStateHandler, this, 0); } Actually it’s not a sleep notification exactly but it’s good enough if you don’t need to handle power in your kext (and you probably don’t want to handle power in your kext) ...

Introduction If you ever need to debug a newly (Yosemite) OSX kernel using firewire here is a small tutorial to help you through. ...