"unsafe"
)

func osinit() {
	// https://webassembly.github.io/spec/core/exec/runtime.html#memory-instances
	physPageSize = 64 * 1024
	initBloc()
	ncpu = 1
	getg().m.procid = 2
}

const _SIGSEGV = 0xb

func sigpanic() {
	gp := getg()
	if !canpanic() {
		throw("unexpected signal during runtime execution")
	}

	// js only invokes the exception handler for memory faults.
	gp.sig = _SIGSEGV
	panicmem()

//
// 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
	}
}

// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, can not allocate memory.
func minit() {
	getg().m.procid = uint64(getthrid())
	minitSignals()
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()
	getg().m.procid = 0
}

// Called from exitm, but not from drop, to undo the effect of thread-owned

	"internal/goarch"
	"internal/stringslite"
	"unsafe"
)

// May run during STW, so write barriers are not allowed.
//
//go:nowritebarrierrec
func sighandler(_ureg *ureg, note *byte, gp *g) int {
	gsignal := getg()
	mp := gsignal.m

	var t sigTabT
	var docrash bool
	var sig int
	var flags int
	var level int32

	c := &sigctxt{_ureg}
	notestr := gostringnocopy(note)

// anyhow for values on the stack. Just ignore msanread when running
// on the system stack. The other msan functions are fine.
//
//go:linkname msanread
//go:nosplit
func msanread(addr unsafe.Pointer, sz uintptr) {
	gp := getg()
	if gp == nil || gp.m == nil || gp == gp.m.g0 || gp == gp.m.gsignal {
		return
	}
	domsanread(addr, sz)
}

//go:noescape
func domsanread(addr unsafe.Pointer, sz uintptr)

//go:linkname msanwrite

			lock(&rw.rLock)
			if rw.readerPass > 0 {
				// Writer finished.
				rw.readerPass -= 1
				unlock(&rw.rLock)
			} else {
				// Queue this reader to be woken by
				// the writer.
				m := getg().m
				m.schedlink = rw.readers
				rw.readers.set(m)
				unlock(&rw.rLock)
				notesleep(&m.park)
				noteclear(&m.park)
			}
		})
	}
}

// runlock undoes a single rlock call on rw.

// See go.dev/issue/67401.
//
//go:linkname atomicwb
//go:nosplit
func atomicwb(ptr *unsafe.Pointer, new unsafe.Pointer) {
	slot := (*uintptr)(unsafe.Pointer(ptr))
	buf := getg().m.p.ptr().wbBuf.get2()
	buf[0] = *slot
	buf[1] = uintptr(new)
}

// atomicstorep performs *ptr = new atomically and invokes a write barrier.
//
//go:nosplit
func atomicstorep(ptr unsafe.Pointer, new unsafe.Pointer) {

		print("runtime: found obj at *(", hex(base), "+", hex(off), ")\n")

		// Dump the source (base) object
		gcDumpObject("base", base, off)

		// Dump the object
		gcDumpObject("obj", obj, ^uintptr(0))

		getg().m.traceback = 2
		throw("checkmark found unmarked object")
	}

	ai := arenaIndex(obj)
	arena := mheap_.arenas[ai.l1()][ai.l2()]
	arenaWord := (obj / heapArenaBytes / 8) % uintptr(len(arena.checkmarks.b))

// so it emits the test and keeps the call, giving the desired
// escape analysis result. The test is cheaper than the call.
var cgoAlwaysFalse bool

var cgo_yield = &_cgo_yield

func cgoNoCallback(v bool) {
	g := getg()
	if g.nocgocallback && v {
		panic("runtime: unexpected setting cgoNoCallback")
	}
	g.nocgocallback = v

	}
	// Examine the CPU profiler's view. Filter it to only include samples from
	// the single test goroutine. Use labels to execute that filter: they should
	// apply to all work done while that goroutine is getg().m.curg, and they
	// should apply to no other goroutines.
	pprofStacks := make(map[string]int)
	for _, s := range prof.Sample {
		if s.Label["tracing"] != nil {
			var fns []string
			var leaf string