func printlock() {
	mp := getg().m
	mp.locks++ // do not reschedule between printlock++ and lock(&debuglock).
	mp.printlock++
	if mp.printlock == 1 {
		lock(&debuglock)
	}
	mp.locks-- // now we know debuglock is held and holding up mp.locks for us.
}

func printunlock() {
	mp := getg().m
	mp.printlock--
	if mp.printlock == 0 {
		unlock(&debuglock)
	}
}

	if !ok {
		// We were unable to get the requested reservation.
		// Release what we did get and fail.
		sysFreeOS(got, physPageSize)
	}
	return
}

func GetNextArenaHint() uintptr {
	return mheap_.arenaHints.addr
}

type G = g

type Sudog = sudog

func Getg() *G {
	return getg()
}

func Goid() uint64 {
	return getg().goid
}

			"(*mspan).base",
			"(*mspan).markBitsForBase",
			"(*mspan).markBitsForIndex",
			"(*mspan).writeUserArenaHeapBits",
			"(*muintptr).set",
			"(*puintptr).set",
			"(*wbBuf).get1",
			"(*wbBuf).get2",

			// Trace-related ones.
			"traceLocker.ok",
			"traceEnabled",
		},
		"runtime/internal/sys": {},
		"runtime/internal/math": {
			"MulUintptr",
		},
		"bytes": {

        final Map<String, Object> dest = newHashMap();
        BeanUtil.copyBeanToMap(src, dest);
        assertThat(dest.get("aaa"), is((Object) "aaa"));
        assertThat(dest.get("bbb"), is(nullValue()));
        assertThat(dest.get("ccc"), is((Object) "ccc"));
        assertThat(dest.get("ddd"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test

//
//go:nosplit
//go:linkname rand
func rand() uint64 {
	// Note: We avoid acquirem here so that in the fast path
	// there is just a getg, an inlined c.Next, and a return.
	// The performance difference on a 16-core AMD is
	// 3.7ns/call this way versus 4.3ns/call with acquirem (+16%).
	mp := getg().m
	c := &mp.chacha8
	for {
		// Note: c.Next is marked nosplit,
		// so we don't need to use mp.locks

// and then calls coroexit to remove the extra concurrency.
func corostart() {
	gp := getg()
	c := gp.coroarg
	gp.coroarg = nil

	defer coroexit(c)
	c.f(c)
}

// coroexit is like coroswitch but closes the coro
// and exits the current goroutine
func coroexit(c *coro) {
	gp := getg()
	gp.coroarg = c
	gp.coroexit = true
	mcall(coroswitch_m)
}

//go:linkname coroswitch

so their memory remains type stable. As a result, the runtime can
avoid write barriers in the depths of the scheduler.

`getg()` and `getg().m.curg`
----------------------------

To get the current user `g`, use `getg().m.curg`.

`getg()` alone returns the current `g`, but when executing on the
system or signal stacks, this will return the current M's "g0" or

//
// Ensure mayMoreStackPreempt can be called for all ABIs.
//
//go:nosplit
//go:linkname mayMoreStackPreempt
func mayMoreStackPreempt() {
	// Don't do anything on the g0 or gsignal stack.
	gp := getg()
	if gp == gp.m.g0 || gp == gp.m.gsignal {
		return
	}
	// Force a preemption, unless the stack is already poisoned.
	if gp.stackguard0 < stackPoisonMin {
		gp.stackguard0 = stackPreempt
	}
}

//   - fortio.org/log
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname getm
func getm() uintptr {
	return uintptr(unsafe.Pointer(getg().m))
}

var (
	// Locking linked list of extra M's, via mp.schedlink. Must be accessed
	// only via lockextra/unlockextra.
	//
	// Can't be atomic.Pointer[m] because we use an invalid pointer as a

		// symbolizer.
		pcBuf[0] = logicalStackSentinel
		if getg() == gp {
			nstk += callers(skip+1, pcBuf[1:])
		} else if gp != nil {
			nstk += gcallers(gp, skip, pcBuf[1:])
		}
	} else {
		// Fast path: Unwind using frame pointers.
		pcBuf[0] = uintptr(skip)
		if getg() == gp {
			nstk += fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf[1:])
		} else if gp != nil {
			// Three cases: