}

			if autosize != 0 {
				// Make sure to save link register for non-empty frame, even if
				// it is a leaf function, so that traceback works.
				// Store link register before decrementing SP, so if a signal comes
				// during the execution of the function prologue, the traceback
				// code will not see a half-updated stack frame.
				// This sequence is not async preemptible, as if we open a frame

For runtime error debugging, it may be useful to run with `GOTRACEBACK=system`
or `GOTRACEBACK=crash`. The output of `panic` and `fatal` is as described by
`GOTRACEBACK`. The output of `throw` always includes runtime frames, metadata
and all goroutines regardless of `GOTRACEBACK` (i.e., equivalent to
`GOTRACEBACK=system`). Whether `throw` crashes or not is still controlled by
`GOTRACEBACK`.

Synchronization
===============

	}

	level, all, docrash := gotraceback()
	if level > 0 {
		if gp != gp.m.curg {
			all = true
		}
		if gp != gp.m.g0 {
			print("\n")
			goroutineheader(gp)
			traceback(pc, sp, 0, gp)
		} else if level >= 2 || gp.m.throwing >= throwTypeRuntime {
			print("\nruntime stack:\n")
			traceback(pc, sp, 0, gp)
		}
		if !didothers && all {
			didothers = true

	CALL	AX

	// should never return
	CALL	runtime·abort(SB)
	UNDEF

/*
 * support for morestack
 */

// Called during function prolog when more stack is needed.
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must

or the failure is internal to the run-time.
GOTRACEBACK=none omits the goroutine stack traces entirely.
GOTRACEBACK=single (the default) behaves as described above.
GOTRACEBACK=all adds stack traces for all user-created goroutines.
GOTRACEBACK=system is like “all” but adds stack frames for run-time functions
and shows goroutines created internally by the run-time.
GOTRACEBACK=crash is like “system” but crashes in an operating system-specific

	dwarfDebugLinesSym *LSym

	GCArgs             *LSym
	GCLocals           *LSym
	StackObjects       *LSym
	OpenCodedDeferInfo *LSym
	ArgInfo            *LSym // argument info for traceback
	ArgLiveInfo        *LSym // argument liveness info for traceback
	WrapInfo           *LSym // for wrapper, info of wrapped function
	JumpTables         []JumpTable

	FuncInfoSym   *LSym
	WasmImportSym *LSym
	WasmImport    *WasmImport

	UNDEF

/*
 * support for morestack
 */

// Called during function prolog when more stack is needed.
// Caller has already loaded:
// R3: framesize, R4: argsize, R5: LR
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must

			q = p

			if autosize != 0 {
				// Make sure to save link register for non-empty frame, even if
				// it is a leaf function, so that traceback works.
				// Store link register before decrement SP, so if a signal comes
				// during the execution of the function prologue, the traceback
				// code will not see a half-updated stack frame.
				// This sequence is not async preemptible, as if we open a frame

	// so switch to g0.

	// Save old SP. Use R13 instead of SP to avoid linker rewriting the offsets.
	MOVW	R13, R5

	MOVW	g_m(g), R6

	// Set vdsoPC and vdsoSP for SIGPROF traceback.
	// Save the old values on stack and restore them on exit,
	// so this function is reentrant.
	MOVW	m_vdsoPC(R6), R7
	MOVW	m_vdsoSP(R6), R8
	MOVW	R7, 4(R13)
	MOVW	R8, 8(R13)

//go:nosplit
func (l *dlogger) pc(x uintptr) *dlogger {
	if !dlogEnabled {
		return l
	}
	l.w.byte(debugLogPC)
	l.w.uvarint(uint64(x))
	return l
}

//go:nosplit
func (l *dlogger) traceback(x []uintptr) *dlogger {
	if !dlogEnabled {
		return l
	}
	l.w.byte(debugLogTraceback)
	l.w.uvarint(uint64(len(x)))
	for _, pc := range x {
		l.w.uvarint(uint64(pc))
	}
	return l
}