GODEBUG=http2client=0  # disable HTTP/2 client support
	GODEBUG=http2server=0  # disable HTTP/2 server support
	GODEBUG=http2debug=1   # enable verbose HTTP/2 debug logs
	GODEBUG=http2debug=2   # ... even more verbose, with frame dumps

Please report any issues before disabling HTTP/2 support: https://golang.org/s/http2bug

The http package's [Transport] and [Server] both automatically enable

		inReg = append(inReg, bool2byte(abid.inRegPtrs.Get(i)))
		outReg = append(outReg, bool2byte(abid.outRegPtrs.Get(i)))
	}
	if ft.Kind_&abi.KindGCProg != 0 {
		panic("can't handle gc programs")
	}

	// Expand frame type's GC bitmap into byte-map.
	ptrs = ft.Pointers()
	if ptrs {
		nptrs := ft.PtrBytes / goarch.PtrSize
		gcdata := ft.GcSlice(0, (nptrs+7)/8)
		for i := uintptr(0); i < nptrs; i++ {

}

// gsignalStack is unused on js.
type gsignalStack struct{}

const preemptMSupported = false

func preemptM(mp *m) {
	// No threads, so nothing to do.
}

// getfp returns the frame pointer register of its caller or 0 if not implemented.
// TODO: Make this a compiler intrinsic
func getfp() uintptr { return 0 }

func setProcessCPUProfiler(hz int32) {}
func setThreadCPUProfiler(hz int32)  {}

   * structures.
   *
   * We make such subtle calls in [okhttp3.internal.ws.MessageInflater] because we try to read a
   * compressed stream that is terminated in a web socket frame even though the DEFLATE stream is
   * not terminated.
   *
   * Use this method to create a degenerate Okio Buffer where each byte is in a separate segment of
   * the internal list.
   */
  @JvmStatic

func ArrayInit(i, j int) [4]int {
	return [4]int{i, 0, j, 0}
}

// Check that assembly output has matching offset and base register
// (issue #21064).

func check_asmout(b [2]int) int {
	runtime.GC() // use some frame
	// amd64:`.*b\+24\(SP\)`
	// arm:`.*b\+4\(FP\)`
	return b[1]
}

// Check that simple functions get promoted to nosplit, even when
// they might panic in various ways. See issue 31219.
// amd64:"TEXT\t.*NOSPLIT.*"

//go:linkname checkptrBase
func checkptrBase(p unsafe.Pointer) uintptr {
	// stack
	if gp := getg(); gp.stack.lo <= uintptr(p) && uintptr(p) < gp.stack.hi {
		// TODO(mdempsky): Walk the stack to identify the
		// specific stack frame or even stack object that p
		// points into.
		//
		// In the mean time, use "1" as a pseudo-address to
		// represent the stack. This is an invalid address on
		// all platforms, so it's guaranteed to be distinct

				continue
			}
			// double the buffer size up to maxBytes
			if len(d.buf) < d.maxBytes {
				base += n
				d.buf = append(d.buf, make([]byte, len(d.buf))...)
				continue
			}
			// must read the rest of the frame (until we stop getting ErrShortBuffer)
			d.resetRead = true
			return nil, nil, ErrObjectTooLarge
		}
		if err != nil {
			return nil, nil, err
		}
		if d.resetRead {

import okhttp3.internal.http2.Header.Companion.TARGET_SCHEME_UTF8
import okhttp3.internal.immutableListOf
import okio.Sink
import okio.Source

/** Encode requests and responses using HTTP/2 frames. */
class Http2ExchangeCodec(
  client: OkHttpClient,
  override val carrier: Carrier,
  private val chain: RealInterceptorChain,
  private val http2Connection: Http2Connection,
) : ExchangeCodec {

	"body",
	"caption",
	"center",
	"col",
	"colgroup",
	"dd",
	"details",
	"dialog",
	"dir",
	"div",
	"dl",
	"dt",
	"fieldset",
	"figcaption",
	"figure",
	"footer",
	"form",
	"frame",
	"frameset",
	"h1",
	"h2",
	"h3",
	"h4",
	"h5",
	"h6",
	"head",
	"header",
	"hr",
	"html",
	"iframe",
	"legend",
	"li",
	"link",
	"main",
	"menu",
	"menuitem",
	"nav",

	sp -= 4 * goarch.PtrSize
	ctxt.set_sp(sp)
	*(*uint64)(unsafe.Pointer(uintptr(sp))) = ctxt.link() // save the current lr
	ctxt.set_link(ctxt.pc())                              // set new lr to the current pc
	// Write the argument frame size.
	*(*uintptr)(unsafe.Pointer(uintptr(sp - 32))) = h.argSize
	// Save current registers.
	h.sigCtxt.savedRegs = *ctxt.cregs()
}

// case 0
func (h *debugCallHandler) debugCallRun(ctxt *sigctxt) {