go-delve/delve · error

could not get thread identity information

Error message

could not get thread identity information

What it means

Error "could not get thread identity information" thrown in go-delve/delve.

Source

Thrown at pkg/proc/native/registers_darwin_amd64.go:301

	case x86asm.R14:
		return r.r14, nil
	case x86asm.R15:
		return r.r15, nil
	}

	return 0, proc.ErrUnknownRegister
}

func registers(thread *nativeThread) (proc.Registers, error) {
	var state C.x86_thread_state64_t
	var identity C.thread_identifier_info_data_t
	kret := C.get_registers(C.mach_port_name_t(thread.os.threadAct), &state)
	if kret != C.KERN_SUCCESS {
		return nil, fmt.Errorf("could not get registers")
	}
	kret = C.get_identity(C.mach_port_name_t(thread.os.threadAct), &identity)
	if kret != C.KERN_SUCCESS {
		return nil, fmt.Errorf("could not get thread identity information")
	}
	/*
		thread_identifier_info::thread_handle contains the base of the
		thread-specific data area, which on x86 and x86_64 is the thread’s base
		address of the %gs segment. 10.9.2 xnu-2422.90.20/osfmk/kern/thread.c
		thread_info_internal() gets the value from
		machine_thread::cthread_self, which is the same value used to set the
		%gs base in xnu-2422.90.20/osfmk/i386/pcb_native.c
		act_machine_switch_pcb().
		--
		comment copied from chromium's crashpad
		https://chromium.googlesource.com/crashpad/crashpad/+/master/snapshot/mac/process_reader.cc
	*/
	regs := &Regs{
		rax:    uint64(state.__rax),
		rbx:    uint64(state.__rbx),
		rcx:    uint64(state.__rcx),
		rdx:    uint64(state.__rdx),

View on GitHub (pinned to a23773e6c3)

When it happens

Trigger: Thrown at pkg/proc/native/registers_darwin_amd64.go:301 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-delve/delve@a23773e6c3 (2026-08-31). Data as JSON: /api/errors/4fbaf496bdc4652b. Report an issue: GitHub.