Implementation sources

Exception delivery structures

osfmk/kern/exception.h · 90 lines · browse source

The kernel exception-handling data structures: struct exception_action (a registered exception port with its behavior and thread-state flavor) and the related declarations used by the exception_triage path.

exception_action source struct
Common storage for exception actions. There are arrays of these maintained at the activation, task, and host.
struct exception_action {
	struct ipc_port         * XNU_PTRAUTH_SIGNED_PTR("exception_action.port") port; /* exception port */
	thread_state_flavor_t   flavor;         /* state flavor to send */
	exception_behavior_t    behavior;       /* exception type to raise */
	boolean_t               privileged;     /* survives ipc_task_reset */
	boolean_t               hardened;       /* associated with the task's hardened_exception_action */
	struct label            *label;         /* MAC label associated with action */
}
hardened_exception_action source struct
struct hardened_exception_action {
	struct exception_action ea;
	uint32_t                signed_pc_key;
	exception_mask_t        exception;
}
exception_init source
Initialize global state needed for exceptions.
extern void exception_init(void);
exception_triage source
Make an up-call to a thread's exception server
extern kern_return_t exception_triage( exception_type_t exception, mach_exception_data_t code, mach_msg_type_number_t codeCnt);
exception_deliver_backtrace source
extern void exception_deliver_backtrace( kcdata_object_t bt_object, ipc_port_t exc_ports[static BT_EXC_PORTS_COUNT], exception_type_t exception);
sys_perf_notify source
Notify system performance monitor
extern kern_return_t sys_perf_notify(thread_t thread, int pid);