Implementation sources

Exceptions & traps

Exception vectors and first-level handlersosfmk/arm64/locore.s

Second-level exception handlersosfmk/arm64/sleh.c

Kernel entry and CPU bring-uposfmk/arm64/start.s

Mach trap tableosfmk/kern/syscall_sw.c

BSD system call dispatch (arm)bsd/dev/arm/systemcalls.c

Mach exception deliveryosfmk/kern/exception.c

Processor and exception-syndrome registers (arm64)osfmk/arm64/proc_reg.h

Saved-state (exception frame) accessorsosfmk/mach/arm/thread_status.h

Exception delivery structuresosfmk/kern/exception.h

Thread and thread_ro structuresosfmk/kern/thread.h

Task & thread coordination

Task restartable ranges changedosfmk/kern/restartable.c

libpthread

Thread creation, lifetime, and attributeslibpthread/src/pthread.c

pthread mutexeslibpthread/src/pthread_mutex.c

pthread condition variableslibpthread/src/pthread_cond.c

pthread read-write lockslibpthread/src/pthread_rwlock.c

Thread-specific datalibpthread/src/pthread_tsd.c

Fork handlerslibpthread/src/pthread_atfork.c

Cancellation and joinlibpthread/src/pthread_cancelable.c

pthread quality of servicelibpthread/src/qos.c

Debugging

Kernel debugging and panic APIosfmk/kern/debug.h

Panic and debugger entryosfmk/kern/debug.c

Kernel Debug Protocol (KDP)osfmk/kdp/kdp.c

Kernel core dumpsosfmk/kdp/kdp_core.h

Userspace debugging

Task-port access and authorizationbsd/kern/kern_proc.c

Task suspension, resume tokens, and thread enumerationosfmk/kern/task.c

Thread suspension, aborts, and state accessosfmk/kern/thread_act.c

Exception-port registration and restorationosfmk/kern/ipc_tt.c

arm64 register and debug-state accessosfmk/arm64/status.c

arm64 debug-register installationosfmk/arm64/pcb.c

Debugger memory operations and cache attributesosfmk/vm/vm_user.c

VM protection, code writes, and target cache traversalosfmk/vm/vm_map.c

Physical-page instruction-cache synchronizationosfmk/arm/pmap/pmap.c

IPC rights and reply-port copyin checksosfmk/ipc/ipc_right.c

MIG (Mach Interface Generator)

MIG compiler driverbootstrap_cmds/migcom.tproj/mig.c

MIG codegen: header (.h)bootstrap_cmds/migcom.tproj/header.c

MIG codegen: user stubsbootstrap_cmds/migcom.tproj/user.c

MIG codegen: server demuxbootstrap_cmds/migcom.tproj/server.c

MIG routine modelbootstrap_cmds/migcom.tproj/routine.c

MIG type marshalingbootstrap_cmds/migcom.tproj/type.c

LLDB debugserver

debugserver task control and exception threadllvm-project/lldb/tools/debugserver/source/MacOSX/MachTask.mm

debugserver Mach exception messages and saved portsllvm-project/lldb/tools/debugserver/source/MacOSX/MachException.cpp

debugserver process launch, attach, stop, and resumellvm-project/lldb/tools/debugserver/source/MacOSX/MachProcess.mm

debugserver per-thread suspension and resume preparationllvm-project/lldb/tools/debugserver/source/MacOSX/MachThread.cpp

debugserver all-stop thread coordinationllvm-project/lldb/tools/debugserver/source/MacOSX/MachThreadList.cpp

debugserver memory writes and instruction-cache flushesllvm-project/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp

debugserver arm64 single-step statellvm-project/lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp

Debugging references

GNU Mach kernel debugger (ddb)the built-in interactive kernel debugger — commands, variables, expressions