minSizeForMallocHeaderIsSizeClass = true
			break
		}
	}
	if !minSizeForMallocHeaderIsSizeClass {
		throw("min size of malloc header is not a size class boundary")
	}
	// Check that the pointer bitmap for all small sizes without a malloc header
	// fits in a word.
	if minSizeForMallocHeader/goarch.PtrSize > 8*goarch.PtrSize {
		throw("max pointer/scan bitmap size for headerless objects is too large")

  reflectOffs,
  timer,
  traceStrings,
  userArenaState
# Above MALLOC are things that can allocate memory.
< MALLOC
# Below MALLOC is the malloc implementation.
< fin,
  spanSetSpine,
  mspanSpecial,
  traceTypeTab,
  MPROF;

# We can acquire gcBitsArenas for pinner bits, and
# it's guarded by mspanSpecial.
MALLOC, mspanSpecial < gcBitsArenas;

# Memory profiling

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Malloc small size classes.
//
// See malloc.go for overview.
// See also mksizeclasses.go for how we decide what size classes to use.

package runtime

// Returns size of the memory block that mallocgc will allocate if you ask for the size,
// minus any inline space for metadata.

	// MALLOC metadata             103ce8000-103cec000    [   16K    16K    16K     0K] r--/rwx SM=COW          DefaultMallocZone_0x103ce8000 zone structure
	// MALLOC guard page           103cf0000-103cf4000    [   16K     0K     0K     0K] ---/rwx SM=COW
	// MALLOC guard page           103cfc000-103d00000    [   16K     0K     0K     0K] ---/rwx SM=COW

extern "C" {

TF_Buffer* TF_NewBuffer() { return new TF_Buffer{nullptr, 0, nullptr}; }

TF_Buffer* TF_NewBufferFromString(const void* proto, size_t proto_len) {
  void* copy = tensorflow::port::Malloc(proto_len);
  std::memcpy(copy, proto, proto_len);

  TF_Buffer* buf = new TF_Buffer;
  buf->data = copy;
  buf->length = proto_len;
  buf->data_deallocator = [](void* data, size_t length) {

}

const void TFE_MonitoringStringGaugeCellValue(
    TFE_MonitoringStringGaugeCell* cell, TF_Buffer* buf) {
  tensorflow::string value = cell->cell.value();
  void* data = tensorflow::port::Malloc(value.length());
  value.copy(static_cast<char*>(data), value.length(), 0);
  buf->data = data;
  buf->length = value.length();
  buf->data_deallocator = [](void* data, size_t length) {
    tensorflow::port::Free(data);

	profstackdepth           int32

	// debug.malloc is used as a combined debug check
	// in the malloc function and should be set
	// if any of the below debug options is != 0.
	malloc    bool
	inittrace int32
	sbrk      int32
	// traceallocfree controls whether execution traces contain
	// detailed trace data about memory allocation. This value
	// affects debug.malloc only if it is != 0 and the execution

static void *sendthr(void *arg) {
	pthread_t th = *(pthread_t*)arg;
	while (1) {
		int r = pthread_kill(th, SIGWINCH);
		if (r < 0)
			break;
	}
	return 0;
}

static void foo() {
	pthread_t *th = malloc(sizeof(pthread_t));
	pthread_t th2;
	pthread_create(th, 0, thr, 0);
	pthread_create(&th2, 0, sendthr, th);
	pthread_join(*th, 0);
}
*/
import "C"

import (
	"time"
)

//export go_callback

	go func() {
		runtime.LockOSThread()
		for {
			select {
			case <-done:
				return
			default:
				runtime.Gosched()
			}
		}
	}()

	runtime.GC()
	// Trigger GC from malloc.
	n := 512
	for i := 0; i < n; i++ {
		_ = make([]byte, 1<<20)
	}

	// Create a bunch of busy goroutines to load all Ps.
	for p := 0; p < 10; p++ {
		wg.Add(1)
		go func() {
			// Do something useful.

		go func() {
			runtime.LockOSThread()
			for {
				select {
				case <-done:
					return
				default:
					runtime.Gosched()
				}
			}
		}()

		runtime.GC()
		// Trigger GC from malloc.
		n := 512
		for i := 0; i < n; i++ {
			_ = make([]byte, 1<<20)
		}

		// Create a bunch of busy goroutines to load all Ps.
		for p := 0; p < 10; p++ {
			wg.Add(1)
			go func() {